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#21
02-02-2008, 02:23 PM
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Quote:
OMT, your cars were not less than 3,000 pounds, were they?
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Badder than old King Kong And meaner than a junkyard dog -Jim Croce |
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#22
02-02-2008, 10:24 PM
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I talked to a guy that raced 4 speed cars for years...
He said the steel wheel was worth ET and mph over the aluminum having ran both.. He said it was because when shifted right ( power shifted ) the engine is at X rpm you pull the next gear and the added inertia of the steel wheel pulled the car up and the motor down less on everyshift more of a snatch than the aluminum. I guess that sort of makes sense... He said If I was not power shifting the Steel would not help. |
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#23
02-03-2008, 03:57 AM
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At the time my streetcar weighed 3580 pounds without me in it. The first time I used the light flywheel was with a 400, an M-20 and 3.90 gears.
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#24
02-03-2008, 09:44 AM
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i asked this in the intention of doing my ram air iv 69 judge super stock car. Car will be heavy at factory wieght & think steel is the way to go.......
i feel PONTIACS need every advantage we can find, but only if it helps with the application. thanks for all your inputs & inertia & mass makes sense for a heavy street car or F.A.S.T. style car
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1969 Early 01D JUDGE #s MATCH RA III 4 Spd (Concours Restored) 1969 PRO STREET GTO 2500 lbs. ALL ALUMINUM 505 1969 RARE All Glass GTO (FOR SALE) YOU NEED THIS AC Cobra Kit Car 521 670 HP/715 Trq LOOKING FOR V PARTS !!!!!!!!!!!! |
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#25
02-03-2008, 02:18 PM
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There are different weight steels. Also the weight of the clutch and disc adds in also.
Form what I've seen on the FAST cars they often don't want to hit those little tires hard at the start to hook them up then pull as they go down the track.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#26
02-03-2008, 03:50 PM
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[QUOTE=J.C.you]i remember seeing a steel/alum flywheel dyno and track comparision years ago in one of the mags. believe i recall correctly, there was a small inertia spike with the steel, in the literature they posted. But, not enough tho, to overcome the alum weight advantage.QUOTE]
I think this is the article you are talking about: http://www.popularhotrodding.com/tec...ase/index.html It has some good theory and testing in there. I use a alum flywheel on my autocross/hillclimb TA and I dont have any issues on the street with it.
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Johnny 1980 455 TA Autocross/Hillclimb Powered by SD Performance http://youtube.com/watch?v=Xc5rpSGwXlM Suspension by www.pro-touringf-body.com |
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#27
02-05-2008, 03:31 PM
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I would say a minimum of 10:1 first gear overall ratio is needed with an aluminum.
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