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Author
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Topic: Put Mach on Chassis Dyno
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ZEATER
Gearhead Posts: 180
From: Mount Pleasant,IA,USA
Registered: Aug 2001
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posted 10-02-2002 12:19 PM
   
Best run was 373.8 @ 5600 rpm 412.1 ft lbs torque @ 3900.The good news os the horsepower curve is very smooth. From 5200 to 6200 it only varied by 2 hp. I ran the car with full exhaust. The air fuel ratio stayed a steady 12.9:1 throughout the run. The final number was a 20 HP increase and 16 ft lb increase from when we started. I had been launching at 3500 and shifting at 5800. The shop suggested launching between 4000 to 4500 and shifting at 6200. I ran a 12.27 @ 111 last time out and was hoping to hit 11's. Weather permitting I'll run up Friday night.
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Mpcoluv
Gearhead Posts: 1341
From: Charlotte NC usa
Registered: Apr 2001
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posted 10-02-2002 12:41 PM
What's your engine combo?
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ZEATER
Gearhead Posts: 180
From: Mount Pleasant,IA,USA
Registered: Aug 2001
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posted 10-02-2002 12:46 PM
428 10.6:1 Ebrock heads Blue thunder intake 850 holley tri y headers Comp Cams hydraulic 292H cam 110 lobe sep Gross lift .56/.56
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Dad Vishus
Gearhead Posts: 1064
From: Moscow, Iowa, USA
Registered: Dec 2001
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posted 10-02-2002 01:58 PM
Hey Zeater, where do you race?If its Cordova, the bracket finals are there this week-end. You are quite a distance from there, so don't want you to make a long trip for nothing.  [This message has been edited by Dad Vishus (edited 10-02-2002).]
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steve'66
Gearhead Posts: 9533
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 10-02-2002 08:51 PM
Zeater,Nice numbers, hope it runs strong for you next time out! SteveW
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kid vishus
Gearhead Posts: 6590
From: middle of NC
Registered: Oct 2000
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posted 10-02-2002 09:41 PM
Yep Zeater, cordova isnt open to general racing this weekend. Next weekend it will be.
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68 S-code GT
Gearhead Posts: 3221
From: Sayreville, NJ, US
Registered: Mar 2000
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posted 10-03-2002 07:08 AM
Is it a FE engine or a stroker?
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ZEATER
Gearhead Posts: 180
From: Mount Pleasant,IA,USA
Registered: Aug 2001
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posted 10-03-2002 10:27 AM
I didn't see about the bracket finals on my Cordova pamphlet. I guess I will hold off a week. Thanks for the info.Yes it is a 428 not stroked
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Dad Vishus
Gearhead Posts: 1064
From: Moscow, Iowa, USA
Registered: Dec 2001
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posted 10-03-2002 11:52 AM
Have you ever gone to Eddyville to race? It can't be any farther than Cordova from Mt. Pleasant. Great 1/8 mile track! Best part is: NO SAND!!  [This message has been edited by Dad Vishus (edited 10-03-2002).]
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ZEATER
Gearhead Posts: 180
From: Mount Pleasant,IA,USA
Registered: Aug 2001
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posted 10-03-2002 12:03 PM
I have heard Eddyville is great. I just can't get into an 1/8th mile mind set. I have always raced 1/4 and that's over fast enough (hopefully faster). I should try it though. I've heard the traction is better.Cordova has improved lately. The pit areas are paved now.
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Dad Vishus
Gearhead Posts: 1064
From: Moscow, Iowa, USA
Registered: Dec 2001
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posted 10-03-2002 12:10 PM
Cordova has improved alot in the last few years.We raced there for the first couple of years. Then we tried Eddyville and have raced there regularly for 7 or 8 years now. Lets put it this way, Cordova is a 45 minute tow from my house. Eddyville is 2 hours. It IS that good.
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kid vishus
Gearhead Posts: 6590
From: middle of NC
Registered: Oct 2000
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posted 10-03-2002 12:32 PM
Also, Scott Gardner has NOTHING to do with Eddyville. He's about as crooked as they come.The traction is TON better at Eddyville, and the entire track and pit areas are way above and beyond anything cordova will ever be able to do.
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n2oMike
Gearhead Posts: 2831
From: Spencer, WV
Registered: Jan 2001
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posted 10-03-2002 03:23 PM
I would have thought horsepower would have kept climbing on up to around 6k or so. You mentioned the car had a full exhaust. Could you inform us what size pipe and which mufflers were used? How about tailpipes? Thanks! ------------------
Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/carbedstangs/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220
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ZEATER
Gearhead Posts: 180
From: Mount Pleasant,IA,USA
Registered: Aug 2001
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posted 10-03-2002 03:42 PM
I am running tri y ceramic coated headers into 2 1/2 inch pipes to flowmaster mufflers. 2 1/2 inch pipes from there to back of car. I'm not sure why horsepower remained basically unchanged from 5200 to 6200. Torque also was 400 at 3500 and at 4500 with the highest at 412 at about 3900 so it was pretty stable. I'm not sure if a steady horsepower curve is a bad thing. It does show I'm producing the high horse for an extended rpm range.
Any suggestions?
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n2oMike
Gearhead Posts: 2831
From: Spencer, WV
Registered: Jan 2001
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posted 10-03-2002 06:35 PM
quote:
Originally posted by ZEATER:
I am running tri y ceramic coated headers into 2 1/2 inch pipes to flowmaster mufflers. 2 1/2 inch pipes from there to back of car. I'm not sure why horsepower remained basically unchanged from 5200 to 6200. ?
I'm thinking the exhaust system might be choking the car off on the top end. Engines don't usually level off like that unless there's a restriction somewhere. Are the tailpipes at least mandrel bent Flowmaster units? Muffler shop tailpipes bent with those hydraulic bending machines get crushed all to h*ll in making those tight bends required to go up and over the axle. The mustang 2.5" pipes are only $99 at Summit, and will be the best money you can spend on a full exhaust system for a mustang. Personally, I'd run 3" pipe back to a set of 3" mufflers that had a set of those 3-bolt header rings welded to their outlets. This will allow for REMOVABLE tailpipes using simple header reducers. When you want the unrestricted power and sound of a 3" exhaust, loosen a few bolts, and you've got a boomin' race ready exhaust. If you want a little quiet, bolt the tailpipes on. The removable tailpipes also all easy removal of the complete exhaust system if you want to do tranny work or run open headers.  Good Luck! ------------------
Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/carbedstangs/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220
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steve'66
Gearhead Posts: 9533
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 10-03-2002 08:35 PM
Yes,That engine needs 3" exhaust. SteveW
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ZEATER
Gearhead Posts: 180
From: Mount Pleasant,IA,USA
Registered: Aug 2001
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posted 10-04-2002 10:34 AM
What about exhaust cut outs?
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jkilroy
Gearhead Posts: 1808
From: Vicksburg, MS
Registered: Dec 99
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posted 10-05-2002 01:30 PM
Those are some great numbers, do you street drive that puppy often? I agree with Mike, those tri-y's are probably cutting you down 20hp on the top end. That cam shouldn't flatten out like that. That blue thunder intake is a dual plane right? That might be a contributing factor also, but if you street drive it, this is nearing perfection. Sounds like you have a well tuned, practical, package, job well done.------------------
Jay Kilroy
68' Fastback GT 390
"No such thing as a cam thats too big"
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Moneymaker
Administrator Posts: 27499
From: Lyons, IL, USA
Registered: May 99
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posted 10-05-2002 01:34 PM
Tires are probably slipping at 5000 RPM. Very common on chassis dynos. ------------------
Alex Denysenko
Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA/MCA 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 Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
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