Posts: 462
From:Auburn, AL.. If you ever stop by check out my daily driver Maverick
Registered: Jan 2000

posted 10-03-2000 12:26 AM               

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Ok, I've got a small double pumper (600 CFM) on my Maverick, I plan on draggin it this Friday and would like to make some carb changes (hopefully for the better)

My combo is below,, I have ported stock heads & a weiand Stealth intake (pulls to 6800).

What jet sizes & shooter sizes would be best, or is a 600 DP about right out of the box? Seems to drive pretty well (except for traction)

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-Charlie Ping
1970 Maverick Grabber
-1987 5.0L B303 roller cam/rockers
-1968 Mustang Toploader
-1977 Lincoln Versailles 9 inch w/discs
-1980 Granada Front Discs
www.MAVERICKGRABBER.com

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Posts: 5491
From:Lyons, IL, USA
Registered: May 99

posted 10-03-2000 11:32 AM               

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Charlie, with open headers (why would anyone want to drag race with them closed?) I would recomend a 4.5 power valve and 64 jets in the primaries. A 35 disscharge nozzel and a pink cam should get you in the right direction also. For the secondaries I would start with 72 jets and a 31 disscharge nozzel. I would not make these modifications until after I made a pass or two to get a baseline and take a spark plug reading. Alex

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Posts: 462
From:Auburn, AL.. If you ever stop by check out my daily driver Maverick
Registered: Jan 2000

posted 10-03-2000 01:24 PM               

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Thanks Alex!
Those are the specifics I was looking for!
I'll leave it stock at first, do a plug check like you said.

Why a 4.5 power valve? I was under the impression that you only stepped down a power valve if your vacuum was too low to support a 6.5. What advantage will the 4.5 give me?

Thanks again. PS: of COURSE the headers 'll be open

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Posts: 462
From:Auburn, AL.. If you ever stop by check out my daily driver Maverick
Registered: Jan 2000

posted 10-04-2000 09:04 PM               

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Alex, another question...

The pink cam... Is it the really light pink one? There are about 3 shades of red..

Thanks Charlie

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Posts: 462
From:Auburn, AL.. If you ever stop by check out my daily driver Maverick
Registered: Jan 2000

posted 10-04-2000 09:41 PM               

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There! You can point it out to me..

[This message has been edited by cpmaverick (edited 10-04-2000).]

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Posts: 5491
From:Lyons, IL, USA
Registered: May 99

posted 10-05-2000 12:23 AM               

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The "PINK" pink one Charlie. The 4.5 power valve will keep it clean at idle and while brake torquing during the launch. Your vacuum will go up when you brake torque the car. Alex

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Posts: 462
From:Auburn, AL.. If you ever stop by check out my daily driver Maverick
Registered: Jan 2000

posted 10-05-2000 10:31 AM               

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Again, Thanks and Again, one more question

Educate me about brake torqueing. Remember I have a stickshift. This will be only my second trip to the track, so I'm a novice.

The pinkpink one has 3 holes... Is that something I should just experiment with?

I can't wait until Friday, my cars back together and running better than ever.

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Posts: 5491
From:Lyons, IL, USA
Registered: May 99

posted 10-05-2000 10:36 AM               

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OOPS! I thought that you had an automatic Charlie. I had forgotten that you put a top loader in it. Scratch the brake torquing part. The 4.5 power valve is still the way to go as it will keep the motor cleaner and not enrichen until WOT. Install the pink cam using the hole that will give you the longest pump shot duration. Alex

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Posts: 462
From:Auburn, AL.. If you ever stop by check out my daily driver Maverick
Registered: Jan 2000

posted 10-05-2000 12:44 PM               

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Cool, Thanks.

I thought brake torqueing was an auto thing... but hey, I'm new to this

According to Holley's website, any shooter 37 or above requires a 50cc accel pump conversion... your (or anybodys) thoughts?

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Posts: 5491
From:Lyons, IL, USA
Registered: May 99

posted 10-05-2000 02:05 PM               

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35 or 37 shooters will work with a 30cc pump. I do it all of the time and have been for about 20 some odd years. Alex

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Posts: 462
From:Auburn, AL.. If you ever stop by check out my daily driver Maverick
Registered: Jan 2000

posted 10-05-2000 02:09 PM               

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Great.

I don't have any more questions, YET!

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Posts: 46
From:Staley,nc
Registered: Sep 2000

posted 10-06-2000 08:58 PM               

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Alex,I've got 25 + 37 squirters.I just put the 37's in primarys and 40's in rear. I believe someone drilled out the 37's because they look to be squirting a bigger shot.
I was wondering why you recomend a smaller shooter on the secoundarys,it just seems it would require something bigger.Could you enlighten me on this,Oh Great Wise One!!
THanks and thanks and thanks....perk

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Posts: 5491
From:Lyons, IL, USA
Registered: May 99

posted 10-06-2000 11:36 PM               

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The primaries open up first and take in the greatest initial "gulp" of air. They seem to need more fuel shot on most V-8 engines. The secondary transition does not require as much becuase vacuum is already begining to pull fuel through the boosters. Alex

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Posts: 225
From:So Cal
Registered: Feb 2000

posted 10-09-2000 10:07 PM            

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Charlie,Just curious on how you did last Friday with all the input you got on the carb jetting.Hope you didn't blow the Maverick up!
Jim

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"Just Falcon Around"
1962 Falcon 351W
1958 Morris Minor 289

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Posts: 462
From:Auburn, AL.. If you ever stop by check out my daily driver Maverick
Registered: Jan 2000

posted 10-10-2000 11:50 AM               

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quote:

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Originally posted by Just Jim:
Hope you didn't blow the Maverick up!
Jim

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Yeah, actually I did.
Blew a head gasket. I only got one run in, before I tried any tuning and before I opened up the headers

14.00 @ 101.25

Not bad, I had a 2.3 60' time.

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Posts: 5491
From:Lyons, IL, USA
Registered: May 99

posted 10-10-2000 12:37 PM               

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Bummer Charlie ! What brand of head gasket do you use and what do you torque the bolts down to? Alex

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Posts: 462
From:Auburn, AL.. If you ever stop by check out my daily driver Maverick
Registered: Jan 2000

posted 10-10-2000 12:44 PM               

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I used new ARP bolts, Fel Pro 1101-1 head gaskets, torqued the heads to 75 ft/lbs, then torqued the tops to 85 (as per Fel-pro's instructions). I think I must hae scratched a gaskt or something... I guess I'll find out. I talked to my head guy and he said to use ARP's torque specs this time so I guess I will...

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Posts: 5491
From:Lyons, IL, USA
Registered: May 99

posted 10-10-2000 12:54 PM               

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I always torque the ARP bolts to 85 lbs. on the short and 95 lbs. on the long. I have been doing it this way for over 10 years and have not had a head gasket failure since. I also do not use Fel-Pro head gaskets in full race applications anymore either. Alex

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Posts: 462
From:Auburn, AL.. If you ever stop by check out my daily driver Maverick
Registered: Jan 2000

posted 10-10-2000 01:51 PM               

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I take it you run 1/2" bolts though?

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Posts: 5491
From:Lyons, IL, USA
Registered: May 99

posted 10-10-2000 02:14 PM               

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Yes I use 1/2 inch bolts on some of MM's engines. I torque those to 95 lbs. and 105 lbs. The spec that I gave is the one that I use on all ARP 7/16ths bolts though Charlie. Alex

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Posts: 225
From:So Cal
Registered: Feb 2000

posted 10-10-2000 01:51 PM            

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Charlie,sorry to hear you blew a gasket,I was hoping you had a good trip to the track.For years,I have used Fel Pro gaskets that come with the 'rebuilder'gasket sets and haven't had any trouble.The last was a Fel Pro 8548PT2 which I just used on the 289.

Alex,what brand head gaskets do you recommend?Maybe my low compression 9.5 to 1 motors get away with the Fel Pros?

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1962 Falcon 351W
1958 Morris Minor 289

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Posts: 5491
From:Lyons, IL, USA
Registered: May 99

posted 10-11-2000 11:18 AM               

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Victor "Reintz". They are German made and were developed for the Boss 302 Trams Am program. Very expensive, not reuseable like the Fel-Pro's, but infalable. Alex P.S. I still use and recomend Fel Pro products. I just will not use their head gaskets (any of them) on any FoMoCo engine that see's the other side of 6000 RPM. I have blown too many of them and do not need the practice.

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Posts: 46
From:Stanton, MI
Registered: Oct 2000

posted 10-11-2000 08:28 PM            

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Alex,
Earlier in this thread you suggested Charlie use larger discharge nozzles, moving up to 35 in the primary and up to 31 in the 2ndaries... would you also recommend that Charlie should use a hollow screw rather than the solid screw? Curiously, Ryan

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From:Lyons, IL, USA
Registered: May 99

posted 10-11-2000 08:32 PM               

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The hollow screws have really never shown me much Ryan and Charlie. I have used them becuase Holley recomended them, but in back to back tests, saw no improvement in ET or response with them. Alex

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Posts: 462
From:Auburn, AL.. If you ever stop by check out my daily driver Maverick
Registered: Jan 2000

posted 10-11-2000 09:08 PM               

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Are the Victor gaskets also known as 'Nitroseal' Alex?

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Posts: 5491
From:Lyons, IL, USA
Registered: May 99

posted 10-11-2000 10:30 PM               

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No Charlie. I believe that the Nitroseal is a Mr. Gasket brand. Alsthough they may be repackaged Victors as Mr. Gasket does a lot of that and make very few of their own gaskets. Alex

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