holley jet extensions advise - Mustangsandmore Forums

Brought to you in part by:

Mustangsandmore Forums

Ford Racing

holley jet extensions advise

profile | register | preferences | faq | search

UBBFriend: Email This Page to Someone!

next newest topic | next oldest topic

Author	Topic: holley jet extensions advise
stoker Gearhead Posts: 142 From: folsom,cal, Registered: Jan 2002	posted 07-31-2002 08:19 PM when draggin ,at what et do they become necesary,any info helps.also what jetting would put me in ballpark 306 inch 430HP 3000 stall 3.50 gear.car will go at least high 12s.weight is around 3000# IP: Logged
Moneymaker Administrator Posts: 19704 From: Lyons, IL, USA Registered: May 99	posted 07-31-2002 08:26 PM Until you start to get at least 3 feet of elevation, they are not required. ------------------ Alex Denysenko Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA member NHRA and IHRA SS/LA National Record Holder '00, '01, & '02 Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 Part time secret agent license #0089 Professional Manwhore The Barry of BarrysGrrl IP: Logged
Mike Harris Gearhead Posts: 122 From: Oakfield, Ga USA Registered: Jul 2002	posted 07-31-2002 10:02 PM Sorry Alex, but I have to disagree. Not only does front end "elevation" uncover the jets, but G-force does as well. One does not necessarily beget the other. This coming from cars that 60 foot in the 1.15-1.20 range and are lifting the front only 6-8 inches, but even that is extreme as it does not take that much. Any car with a 60 foot of 1.70's or better will benefit from it. Even if someone put them in there that may not really need it, they will certainly not harm anything. Nothing worse than someone jetting a carb to the moon to overcome a bog only to find out they were uncovering the jets. P.S.- Alex, just noticed the "professional manwhore" title. Please tell me you would pass on the giant with the size 24 feet!! ------------------ Mike Harris MKZ Racing home.isoa.net/~mharrisj IP: Logged
64FalconF-16 Gearhead Posts: 191 From: Republic Of Texas!! Temporarily living in KY Registered: Feb 2002	posted 07-31-2002 10:11 PM I have disagree too. Jet extensions are cheap insurance. You do not want to run you engine lean because of the G forces that force the fuel in the rear bowl away from the jets. If you run N20 or a supercharger they are a must.. ------------------ 64 Pro-Street Falcon 351C 4V 8.1s in 1/8 79 Ford Bronco 4 X 4 Lifted 6" 400 9.9s in 1/8 :) 70 Plymouth Cuda' 440 Magnum. 2600# Race Car 6.90 in 1/8 IP: Logged
steve'66 Gearhead Posts: 6522 From: Sonoma,CA,USA Registered: Mar 2000	posted 07-31-2002 10:15 PM Also, On a stick car they seem to be more important than the slightly later hit of an auto. With the current combo c-4 & 408w the 850 doesn't have jet extensions at a 1.53 60'er. But the old 351w t-5 tranny needed them at 1.68 60'ers. Also running the float level high in the rear bowl can overcome the problem too. SteveW IP: Logged
Moneymaker Administrator Posts: 19704 From: Lyons, IL, USA Registered: May 99	posted 07-31-2002 10:39 PM OK, OK, you guys win. Stoker, just as soon as you start 60 footing in the 1.15 range, hurry up and get those real cool horsepower increasing jet extensions installed. ------------------ Alex Denysenko Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA member NHRA and IHRA SS/LA National Record Holder '00, '01, & '02 Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 Part time secret agent license #0089 Professional Manwhore The Barry of BarrysGrrl IP: Logged
Mike Harris Gearhead Posts: 122 From: Oakfield, Ga USA Registered: Jul 2002	posted 07-31-2002 10:53 PM quote: Stoker, just as soon as you start 60 footing in the 1.15 range, hurry up and get those real cool horsepower increasing jet extensions installed. Hmmm, that tomato was thrown at me? Please re-read my post, I meant nothing disrespectful, nor that he had to hit 1.15 60's. Only saying that elevation was not the only reason. ------------------ Mike Harris MKZ Racing home.isoa.net/~mharrisj IP: Logged
steve'66 Gearhead Posts: 6522 From: Sonoma,CA,USA Registered: Mar 2000	posted 07-31-2002 11:14 PM Mike, It's ok it was thrown at all of us. Maybe we didn't need the extensions with the stick car. but they seemed to help, and were cheap. Alex is "da man". SteveW p.s. Alev, BTW I got Dave's wheels today. Gonna have the slicks mounted on them tomorrow. Don't get to race 'cause of the Nationals at Infineon this w/e but they should help. Thanks, SteveW IP: Logged
Moneymaker Administrator Posts: 19704 From: Lyons, IL, USA Registered: May 99	posted 07-31-2002 11:44 PM No tomatos, just oranges. Cool Steve. Nice aren't they? P.S. Didn't you guys see the wink? ------------------ Alex Denysenko Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA member NHRA and IHRA SS/LA National Record Holder '00, '01, & '02 Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 Part time secret agent license #0089 Professional Manwhore The Barry of BarrysGrrl IP: Logged
Rory McNeil Gearhead Posts: 1210 From: Surrey, B.C. Canada Registered: Nov 2000	posted 08-01-2002 02:56 AM As Steve mentioned, raising the rear float level will do the job in most instances. My Fairmont does go 1.15 60foots, or does 3 foot wheelstands, but it HAS gone 1.32 60 foots, along with 2 foot+ wheelstands I run a single 780 Holley vacumn secondary carb, with no jet extensions, but I do have the secondary float level cranked up quite a bit. I first uncovered the rear jets back when I installed a trans brake, & the car would launch, lay down, & then take off. I simply cranked up the float level until the problem disapeared. I`m probably 2 full turns of needle & seat higher than having the fuel just at the sight plug hole,but I`ve never had any problems the carb dumping fuel out of the boosters, or loading up when hitting the brakes after the burnout. It`s been set up like this for at least 10 years, with the auto,& the 4 speed, works just fine. ------------------ 78 Fairmont 428 4 speed 10.20@130mph 80 Fairmont 302 5 speed 12.8@105mph 85 Mustang NHRA Stocker under construction, 302 5 speed IP: Logged
bluestreek Gearhead Posts: 1289 From: Athens,GA Registered: Jul 2001	posted 08-01-2002 09:44 AM Throw some tomatoes at me, I love them!! Home grown preferred. I don't know if it was the rear jets, the fuel system, or the fuel pickup in the tank, but right at 1.70 60', My Stang began to fall on it's face after the front end began to lift. I upgraded everything and it cured the nose dive. Just like baseball, it's better to have all your bases covered. IP: Logged
Moneymaker Administrator Posts: 19704 From: Lyons, IL, USA Registered: May 99	posted 08-01-2002 06:14 PM Time for jet extensions??? http://ihra.com/photos/2002/northern/sunday/Dsc00966.jpg ------------------ Alex Denysenko Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA member NHRA and IHRA SS/LA National Record Holder '00, '01, & '02 Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 Part time secret agent license #0089 Professional Manwhore The Barry of BarrysGrrl IP: Logged
Mike Harris Gearhead Posts: 122 From: Oakfield, Ga USA Registered: Jul 2002	posted 08-01-2002 11:08 PM I dunno, Bryan needed them after this pass at 3270 pounds on 10.5's (not W's), as well as a new bumper. http://home.isoa.net/~mharrisj/br3.jpg ------------------ Mike Harris MKZ Racing home.isoa.net/~mharrisj IP: Logged
Moneymaker Administrator Posts: 19704 From: Lyons, IL, USA Registered: May 99	posted 08-01-2002 11:16 PM Time for some wheelie bars??? ------------------ Alex Denysenko Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA member NHRA and IHRA SS/LA National Record Holder '00, '01, & '02 Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 Part time secret agent license #0089 Professional Manwhore The Barry of BarrysGrrl IP: Logged
jsracingbbf Gearhead Posts: 1677 From: Batesville,MS. , U.S.A. Registered: Mar 2002	posted 08-01-2002 11:36 PM Cool pics! I like the Alex's Mustang better though Mike. Course I'm predjudiced. Also I would like to point out Alex is running a SBF no nitrous, while your buddy has a 540 CID BBC on the juice. I know the chevy is heavy but......gosh I'm thinkin the lil SBF is impressive! Just my .02 cents and No I wouldn't suck up to Alex for nothing I only suck up to my wife. LOL ------------------ Jerry Smith 69 Mustang Pro ET Drag "Even a blind hog can find an acorn every now and then " IP: Logged
Mike Harris Gearhead Posts: 122 From: Oakfield, Ga USA Registered: Jul 2002	posted 08-01-2002 11:40 PM They don't allow them in this class Alex. This is Limited Street that runs with the Outlaw 10.5 cars. 3100 pound minimum, true 10.5 tires, mufflers,.....and no wheelie bars. Makes for a great show, but gets VERY expensive. I have two cars I work on that run this class, and Bryan is a fellow racer. He had just gotten the ladder bars swapped for a 4-link. We told him we were gonna put a mobile home trailer hitch ball in his seat as a back-up for the 5 point harness!! ------------------ Mike Harris MKZ Racing home.isoa.net/~mharrisj IP: Logged
stoker Gearhead Posts: 142 From: folsom,cal, Registered: Jan 2002	posted 08-01-2002 11:47 PM i know every application is different!but is 72 prim. & 82 sec jetting seem close to you guys.carb is 4150 dp 4777-2 with 50cc pump.original jetting is 67&76.also want to race at 5000 feet elevation,how much do you jet down verses zero elevation IP: Logged
Mike Harris Gearhead Posts: 122 From: Oakfield, Ga USA Registered: Jul 2002	posted 08-01-2002 11:57 PM Never said it wasn't impressive Jerry, I like it too! 5.20's through the 1/8 mile on true 10.5 inch tires ain't shabby either regardless of the powerplant. That's why I like the class.....the tire is the limiter. Of course, knowing that this IS a Ford site and not chebbies..... Ever seen this Mustang? http://www.wolferacecraft.com/images/job-09.JPG Stock rear suspension set-up, 3270 pounds, SBF w/turbo, 28x10.5 tires...7.77 @ 186mph!! Ya gotta like that! ------------------ Mike Harris MKZ Racing home.isoa.net/~mharrisj IP: Logged
Moneymaker Administrator Posts: 19704 From: Lyons, IL, USA Registered: May 99	posted 08-02-2002 12:01 AM Ok guys how about my buddy Joe Aluise. http://ihra.com/photos/2002/cordova/joe_aluise.jpg No offence Mike H. but here's one of my own. 3400 lbs of 63 Plymouth Belvedere, 9 inch tires, no juice, 443 cubes of NHRA and IHRA legal stock eliminator motor and oh yeah....no jet extensions. LOL ------------------ Alex Denysenko Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA member NHRA and IHRA SS/LA National Record Holder '00, '01, & '02 Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 Part time secret agent license #0089 Professional Manwhore The Barry of BarrysGrrl IP: Logged
Moneymaker Administrator Posts: 19704 From: Lyons, IL, USA Registered: May 99	posted 08-02-2002 12:03 AM You need to jet down about 2-4 sizes and up the timing 3-4 degrees for starters in 5k feet of air. ------------------ Alex Denysenko Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA member NHRA and IHRA SS/LA National Record Holder '00, '01, & '02 Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 Part time secret agent license #0089 Professional Manwhore The Barry of BarrysGrrl IP: Logged
Moneymaker Administrator Posts: 19704 From: Lyons, IL, USA Registered: May 99	posted 08-02-2002 12:06 AM Or......if you are really so impressed with chebbies, my other buddy Matt Morgan and his 502 GM crate motored Top Stocker also on 9 inch tires with no juice and at 3700 lbs. http://ihra.com/photos/2002/cordova/matt_morgan.jpg PS Also with no jet extensions. ------------------ Alex Denysenko Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA member NHRA and IHRA SS/LA National Record Holder '00, '01, & '02 Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 Part time secret agent license #0089 Professional Manwhore The Barry of BarrysGrrl IP: Logged
Mike Harris Gearhead Posts: 122 From: Oakfield, Ga USA Registered: Jul 2002	posted 08-02-2002 12:21 AM Cool wheelstands. I like the bumper shot. (Crunch!) Also, it is not that I am so impressed with Chebbies. I like all hotrods.....American muscle that is. Anyhow, here is one of me getting about 4 feet of air after eating pork n' beans.....well, better not show that one. Good thing I had my jet extensions!!! ------------------ Mike Harris MKZ Racing home.isoa.net/~mharrisj IP: Logged
Moneymaker Administrator Posts: 19704 From: Lyons, IL, USA Registered: May 99	posted 08-02-2002 12:23 AM LOL ------------------ Alex Denysenko Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA member NHRA and IHRA SS/LA National Record Holder '00, '01, & '02 Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 Part time secret agent license #0089 Professional Manwhore The Barry of BarrysGrrl IP: Logged
Mike Harris Gearhead Posts: 122 From: Oakfield, Ga USA Registered: Jul 2002	posted 08-02-2002 12:26 AM BTW, since you run IHRA,,,,do ya know Ronnie "The King" Davis in Top Sportsman? He runs Outlaw some too. Cool guy. They are gonna run TS in NHRA too now from what he said. ------------------ Mike Harris MKZ Racing home.isoa.net/~mharrisj IP: Logged
Moneymaker Administrator Posts: 19704 From: Lyons, IL, USA Registered: May 99	posted 08-02-2002 12:29 AM Yes I know Ronnie very well. He is a good racer and a good dude. By the way, not that this particular pass or wheel stand is so impressive by my little tiny 289 http://ihra.com/photos/2002/northern/epps/denasynko.jpg but it had a 1.464 sixty foot time........ on the rear wheels ------------------ Alex Denysenko Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA member NHRA and IHRA SS/LA National Record Holder '00, '01, & '02 Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 Part time secret agent license #0089 Professional Manwhore The Barry of BarrysGrrl IP: Logged
Mike Harris Gearhead Posts: 122 From: Oakfield, Ga USA Registered: Jul 2002	posted 08-02-2002 12:37 AM On the rear wheels? That is cool. Any wheelstand is impressive, heck that one is. Look at it again, the guy with his ears covered could've gotten up under there and changed the oil for ya'! Think about the poor ricers though. They have to line up in reverse to get air That would be a b!tch going down the track....but ya know, if they watched Fast and Furious....I could sell THEM some jet extensions!! LOL ------------------ Mike Harris MKZ Racing home.isoa.net/~mharrisj IP: Logged
Moneymaker Administrator Posts: 19704 From: Lyons, IL, USA Registered: May 99	posted 08-02-2002 12:42 AM Hey Mike, if you are gonna be up for a while and want to shoot the sht why don't you hop in the Hot Tub chat room? http://www.geocities.com/~mustangs68/hottub.html ------------------ Alex Denysenko Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator* NHRA/IHRA/SRA member NHRA and IHRA SS/LA National Record Holder '00, '01, & '02 Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 Part time secret agent license #0089 Professional Manwhore The Barry of BarrysGrrl IP: Logged
Mike Harris Gearhead Posts: 122 From: Oakfield, Ga USA Registered: Jul 2002	posted 08-02-2002 12:46 AM Just on my way to bed Alex. It is 12:48 my time and 4:45 will get here quicker than I care to. I am gonna bookmark the link though for the next time everybody goes to it, I'll know how to get there. Is that something done regularly? I'll check back in tomorrow...well, later today. Take care! ------------------ Mike Harris MKZ Racing home.isoa.net/~mharrisj IP: Logged
Moneymaker Administrator Posts: 19704 From: Lyons, IL, USA Registered: May 99	posted 08-02-2002 12:48 AM Yes Mike, we try and do it every Tuesday night for at least an hour or so between 8 and 9 PM CST. (9-10 your time) ------------------ Alex Denysenko Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA member NHRA and IHRA SS/LA National Record Holder '00, '01, & '02 Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 Part time secret agent license #0089 Professional Manwhore The Barry of BarrysGrrl IP: Logged
cpmaverick Moderator Posts: 1564 From: Auburn, AL. Registered: Jan 2000	posted 08-02-2002 05:16 AM Actually Alex, I picked up 2 seconds in the 1/4 with my jet extensions when the Maverick was running 2.0 60' times. At least I think I did. They do go in the front bowl right? ------------------ -Charlie Ping 1970 Maverick Grabber [email protected] with AC and overdrive. http://www.maverickgrabber.com IP: Logged
Mike Harris Gearhead Posts: 122 From: Oakfield, Ga USA Registered: Jul 2002	posted 08-02-2002 08:03 AM quote: Originally posted by cpmaverick: Actually Alex, I picked up 2 seconds in the 1/4 with my jet extensions when the Maverick was running 2.0 60' times. At least I think I did. They do go in the front bowl right? Talk about brown-nosing. Ya went here http://www.amusingpics.com/viewimage.php?id=149&file=brownnose.jpg didn't ya' ?? Just kidding. BTW, nice car. How do you like the Cal-Trac bars? Haven't actually seen them first hand yet and had a couple people I know interested in them. Alex, I will definitely be there next week. ------------------ Mike Harris MKZ Racing home.isoa.net/~mharrisj IP: Logged
Moneymaker Administrator Posts: 19704 From: Lyons, IL, USA Registered: May 99	posted 08-02-2002 10:16 AM I like the Cal-Track bars as we as the C&E Slide-a-Links. ------------------ Alex Denysenko Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA member NHRA and IHRA SS/LA National Record Holder '00, '01, & '02 Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 Part time secret agent license #0089 Professional Manwhore The Barry of BarrysGrrl IP: Logged
cpmaverick Moderator Posts: 1564 From: Auburn, AL. Registered: Jan 2000	posted 08-02-2002 11:12 AM Hehe, I wasn't brown nosing, just looking for a laugh. I'm more than happy to argue with Alex even though I usually lose Haven't been to the track with the Cals yet. I'm currently converting the Maverick to cable clutch and going through the T5. ------------------ -Charlie Ping 1970 Maverick Grabber [email protected] with AC and overdrive. http://www.maverickgrabber.com IP: Logged
kid vishus Gearhead Posts: 4538 From: middle of NC Registered: Oct 2000	posted 08-02-2002 11:43 AM Well, I hate to disagree with Alex, but when my granada got down to running mid to low 1.50 60' times, jet extensions helped it. I have a playback tach with a printer interface, and I used to have acces to a printer so I could print the rpm from the entire run. Without the jet extensions, there was an rpm drop after teh launch. (and not the normal rpm drop from the convertor "coming down" from the initial flash, it was after that). Once I put the jet extensions on, the secondary drop went away. It was never bad enough that it was real obvious to me that it was there, but it did show up on the graph. I probbably could have raised the rear float level and cured it, but at the time I didnt think of that. Jet extensions was my first thought, and it it worked. ------------------ Rob Hetzler member #773 '69 mustang, 351C, 9.97 @ 133 mph 1/4, 6.27 @ 108 1/8, 1.344 60' '70 mustang, flintstone power '93 F150 Lightning 15.33 @ 87 mph, completely stock with 149k miles '99 Pro Et track champion '00 Mod ET R-up (with new car) My Photo Page IP: Logged
Moneymaker Administrator Posts: 19704 From: Lyons, IL, USA Registered: May 99	posted 08-02-2002 12:04 PM Hey guys....I never said that they wouldn't HELP. I have used them dozens of times on Holleys to cure a multitude of difficulties. I just don't think that every application needs them. As with all race prep, most is all test and tune. ------------------ Alex Denysenko Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA member NHRA and IHRA SS/LA National Record Holder '00, '01, & '02 Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 Part time secret agent license #0089 Professional Manwhore The Barry of BarrysGrrl IP: Logged
cpmaverick Moderator Posts: 1564 From: Auburn, AL. Registered: Jan 2000	posted 08-02-2002 05:29 PM Well now you are just being sneaky Notice I never said they wouldn't help either Haha. ------------------ -Charlie Ping 1970 Maverick Grabber [email protected] with AC and overdrive. http://www.maverickgrabber.com IP: Logged
jsracingbbf Gearhead Posts: 1677 From: Batesville,MS. , U.S.A. Registered: Mar 2002	posted 08-03-2002 01:02 AM Mike why are the tires a limiter? I know it's tricky getting small tires to bite but if you overcome that, they would seem to have an advantage. Yes/No? less rotating mass = less weight, wouldn't this be better? I used to run a 10.5 inch tire because that was all that would fit under my first car. I liked them just fine as long as the track was prepped well they seemed to bite good. Of course back then I ran allot less motor than now. ------------------ Jerry Smith 69 Mustang Pro ET Drag "Even a blind hog can find an acorn every now and then " IP: Logged