need ideas for HT383 crate motor w/TPI...
07-20-2002, 12:18 AM
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Car: '86 IROC-Z/'94 Z28
Engine: 350 LT1/382 LT1
Transmission: 4L60-E/T-56
Axle/Gears: 3.45/3.42 (soon 4.10)
need ideas for HT383 crate motor w/TPI...
OK, I just got an HT383 crate motor rotating assembly (practically brand new)for my 6-speed '86 IROC for next to nothing from a friend who works for the dealer...and I have a perfect 350 roller block for it all to go into. I also have a set of mildly ported Vortec heads, but I also have a ported set of ZZ4 L98 heads and an LT1 intake. I also have an LT4 hot cam and I'm considering a CC305 or CC306 cam if I use the LT1 intake (with future plans to replace the heads with AFR's later). So basically I can use the Vortec heads, buy the Vortec base and use my SLP runners and 24# SVO's with the LT4 hot cam, or use a CC305/6 cam with ported aluminum L98's and my LT1 intake. I'm stumped, I have no idea which I want more and I want both. Mainly because I dunno how much the L98's flow compared to the vortec's. The L98 heads have high-lift springs and 7/16 studs and guideplates. I'd love to have 500 ft.lbs but want that cam lope and high-end pull too. Any recomendations? I don't plan on using any power adders with this motor, as it has hyperutectic pistons and I'm on a budget. Rear gears are 3.73 w/a torsen HD...315-35ZR17's out back. (did I say budget? 
) Trans is a new '95 unit with a Ram performance clutch (for the time being) and will be installed as soon as I get my credit card reissued to pay for my crossmember 
.
(I can also go real freaky and replace the rotating assembly in my 4.00" '93 LT1 motor and drop that in
)
This is a street/strip/track vehicle. Mileage is somewhat a concern...don't mind giving up a couple mpg's for a nicer cam (only a couple). Somebody help so I can get this motor in! I have 6 motors in my garage and can't make up my mind!
) Trans is a new '95 unit with a Ram performance clutch (for the time being) and will be installed as soon as I get my credit card reissued to pay for my crossmember .(I can also go real freaky and replace the rotating assembly in my 4.00" '93 LT1 motor and drop that in
)This is a street/strip/track vehicle. Mileage is somewhat a concern...don't mind giving up a couple mpg's for a nicer cam (only a couple). Somebody help so I can get this motor in! I have 6 motors in my garage and can't make up my mind!
07-20-2002, 12:42 AM
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Car: '86 IROC-Z/'94 Z28
Engine: 350 LT1/382 LT1
Transmission: 4L60-E/T-56
Axle/Gears: 3.45/3.42 (soon 4.10)
by the way, the specs of the cams...
LT4 Hot hydraulic roller
218/228
.525"/.525"(1.6 rocker)
112 LSA
CC306 hydraulic roller
230/244
.510"/.540"
112 LSA
CC XE282HR hydraulic roller
(same cam chevy high performance dyno tested the HT383 at making 455HP(5600) and 493 ft./lbs (4200) w/vortec heads)
230/236
.510"/.520"
110 LSA
I don't have the exact specs on the CC305 right now...
LT4 Hot hydraulic roller
218/228
.525"/.525"(1.6 rocker)
112 LSA
CC306 hydraulic roller
230/244
.510"/.540"
112 LSA
CC XE282HR hydraulic roller
(same cam chevy high performance dyno tested the HT383 at making 455HP(5600) and 493 ft./lbs (4200) w/vortec heads)
230/236
.510"/.520"
110 LSA
I don't have the exact specs on the CC305 right now...
Last edited by dhirocz; 07-20-2002 at 12:47 AM.
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