LG4 heads vs. LO3 heads

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Mar 10, 2002 | 09:07 PM

94'_SS

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Joined: Jun 2001

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From: Tyler, Texas

LG4 heads vs. LO3 heads

Is there that big of a diffrence in the two? The LG4/L69 heads are supposed to preform better but how much? Would this swap make my stock chip throw fits? And how hard would it be to find 87 LG4 heads so my centerbolts will still work? Can both heads handle the LT4 hot cam? And would the hot cam freak my computer out?

Thanks for the help guys.

Mar 10, 2002 | 09:16 PM

brodyscamaro

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Joined: Mar 2001

Posts: 5,144

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From: CC, TX

Car: 1999 Yamaha Banshee

Engine: 379cc twin cyl 2-stroke stroker

Transmission: 6 spd manual

Axle/Gears: 14/41 tooth

i would think the LT4 hot cam would freak your computer out but i am not sure

Mar 10, 2002 | 09:46 PM

94'_SS

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From: Tyler, Texas

Here are the stats on the LT1 vs. LT4 Hot

LT1
Price: $219.75
Part # 12551705
Duration @ 0.050" Lift: 201/208
Lift: .447"/.459"
Lobe Separation: N/A
RPM Range:
Type: Hydraulic roller
1995-97 LT1 Corvette-Camaro.

LT4 Hot Cam Price: $175.50
Part # 24502586
Duration @ 0.050" Lift: 218 / 228
Lift: 0.525" / 0.525"
Lobe Separation: 112
RPM Range: 1500-6000
Type: Hydraulic roller LT4 Hot Cam
LT4 Hot Cam can be used in any late model (1986 and newer) Small Block Chevrolet block for a significant horsepower gain at a reasonable price.

But, the hot cam is supposed to use 1.6 rockers.

Is this too much lift and duration? Has any one done this swap (the hot cam of course everyone and their dog is doing the LT1 swap) and kept the computer?