A fellow thirdgenner, checkeye, has installed vortec L31 heads, a CompCams 252 cam and the Vortec Performer manifold on his LG4. Edelbrock Headers, 3" Cat and a 3" Edel cat back were already there. His car ran 15.X before the swap. Today I watched him make a traction impaired run (2.43 60') of 14.58 @ 99.79 mph. Do the math, http://prestage.com/carmath/calc_HP_...HandWeight.asp this car has gained major HP. No Qjet tuning that I'm aware of and he lost about .5 points of compression, down from 8.6:1 to 8.0:1 because of the larger combustion chambers and thicker head gasket.

This is another testament to the performance of the vortec cyl heads ($400). If you are looking to hop up your LO3 cheap, bolt a set of these on and stab in a good cam.

If you haven't checked, with traction 99.79 mph is 13.9 territory. Damn it was exciting!

[This message has been edited by Brent (edited November 04, 2000).]

 

thats real good, especially for an LG4

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1989 pontiac firebird
bright red extior(just repainted)
grey interior
5 spd
305 TBI (stock)
WS.6 formula wheels
3.73 posi rear end
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system: 2 10" MTX thunder 2000 in a Professionally done custom bandpass box.
Blaupunkt CD player
Blaupunkt 4x6 and 6x9
600 watt rockford fosgate 4.6 amp

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