Where should they be for drag race performance?


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Gunmetal 89GTA T-Tops L98
Gettin there's all the fun
Best 60 ft: 1.996'
Best 1/8th mile: 9.02 @ 76.5mph with 60' time of 2.14
Mods: air filter, hypertech chip, 3" exhaust

 

TPI cars generally like to shift in the ballpark of 5000 rpms with a 700R-4, and that depends some on the air temperature. They like to go higher RPM with very cold air.
Also they generally like to be shifted out of first gear at approx 500 rpms higher than the 2nd-to-3rd shift because of the difference in gear spread in the 700R.

This should get you close, but each car is a little different. Best way is to experiment using a G-tech or vericom to see what the car likes.
good luck
ODB


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*I do custom performance mods on Edlebrock Performer carburetors (dualplane intake mods in the works),
White 1986 Irocz, 305 with iron #416 heads,
383 with aluminum TFS heads,
Edlebrock Performer-RPM intake and Performer #1407 carburetor, +110hp shot of crack, 700R-4 tranny, Vigilante 2400 lockup converter, 3.25:1 Ford 9" rear, Mcreary Road-Stars, SLP-stainless 1.75" shortie headers & Y-pipe, single 3" Borla exhaust, Linginfelter-TPI camshaft part number 74216 pulls 17" vacuum solid. Cam specs 213/219 @.050 114-LSA, sometimes advertised at 216/219 @.050 112-LSA .462/.470 lift @1.5:1 ratio. Using Harland Sharp 1.65:1 roller rockers. MSD-6AL, billet distributor, multi-retard, blaster-3 coil, and RPM switch. SouthSide machine subframe connectors, SSM lift-bars, Moroso 4" underdrive crank pulley.

N/A runs 10.9 @124,
Crack-runs 10.3 @135
haven't run at track since Oct-99

 

I would have to say that a TPI (stock) runs out of breath around 4500, so that would be a better shift point.

For daily, I have mine set around 3300 and it will go up to 5200 when I punch it. My engine runs out of steam about 5300 too.

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1984 z28 w/ a 357 cu in. monster engine which is looking like the posterchild for Edelbrock with the exception of the Holley 750vac... all the suspension stuff... 9-bolt posi disk is in...

-=ICON Motorsports=-