LT1 to LT4
#1
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Car: 87 vert
Engine: LT1
Transmission: T5
LT1 to LT4
Buddy of mine as the same LT1 set up as I have in my 3rdgen. If he where to add in the LT4 heads& intake(complete). How much more HP are we looking at?
#2
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Car: 86Z/92 RS Camaro
Engine: 357 vortec finished. need tuning
Transmission: Still works
Axle/Gears: need 3.73
With an LT4 intake/heads, Hot Cam, 1.6 rockers with valve spring, you should be able to get around or over 400HP.
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Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
The upgrade is not worth it. You can port the stock heads and go with a better cam than the hot cam and come out way faster and cheaper.
#4
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Originally posted by ShiftyCapone
The upgrade is not worth it. You can port the stock heads and go with a better cam than the hot cam and come out way faster and cheaper.
The upgrade is not worth it. You can port the stock heads and go with a better cam than the hot cam and come out way faster and cheaper.
A better way would be to get the stock heads ported, get 1.6 rockers, something like a CC306 or GM847 cam, Comp R lifters, 58mm TB, 30# injectors, and LT4 timing set, and run low 12's to high 11's, and spend less or close to the same amount of money, and be much faster.
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Car: 1991 RS Camaro (Jet Black)
Engine: 95 383 CI (6.3) LT1
Transmission: 95 T-56
Get the heads, intake, 1.6 roller rockers and a bigger cam. Only way the conversion is viable. The 425 hp they advertise was done using a $3000 aftermarket EFI system. With a CC305 or CC306 and the LT4 heads and intake and big cam like a gm847 or CC306, your practically gauranteed a 375rwhp number with a good tune.
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