Stg II 5.3 heads + 232/236 cam good enough for 383 Stroker?
09-29-2004, 11:59 AM
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Stg II 5.3 heads + 232/236 cam good enough for 383 Stroker? Here's what I have in the garage waiting to be installed:
MTI Stage II 5.3 Heads: 2.02/1.60, milled .030 for 11.3:1 CR
Cam is: 232/236 .571/.578 114 +4
I want a 383 Stroker in the future and I'm wondering if these heads and cam will suffice. Will I need to upgrade to Stg III LS6 or 6.0L heads? Will I need a bigger cam? The FAST 90mm LSX intake would be installed w/ the 383. My goal is close to 470-480 rwhp. I don't know if that is looking for too much, but I would at least like to have 450 rwhp NA.
MTI Stage II 5.3 Heads: 2.02/1.60, milled .030 for 11.3:1 CR
Cam is: 232/236 .571/.578 114 +4
I want a 383 Stroker in the future and I'm wondering if these heads and cam will suffice. Will I need to upgrade to Stg III LS6 or 6.0L heads? Will I need a bigger cam? The FAST 90mm LSX intake would be installed w/ the 383. My goal is close to 470-480 rwhp. I don't know if that is looking for too much, but I would at least like to have 450 rwhp NA.
09-29-2004, 12:20 PM
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Originally Posted by C4VetteLS1
Yea....sounds like a nice combo..I wouldnt blow the money on the fast intake/TB.
With ls6 and a ported TB that sounds like a nice 450-475 rwhp combo
With ls6 and a ported TB that sounds like a nice 450-475 rwhp combo
can anyone else chime in?
09-29-2004, 03:50 PM
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I picked up 15 rwhp and 15rwtq by just adding the intake and t/b on a stock 346 through a 12 bolt, so you should be around your numbers if you want to spend the bucks....
09-29-2004, 04:34 PM
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383 combo! Here is the dynograph of my lunati 383 with MTI stage III LS6 heads after adding the 90mm LSX intake, FAST TB & a Meziere EWP. The lower graph was before with an LS6 intake & ported TB. I have the R1 cam (232/236 .578/.575 112) installed straight up. Hope this helps you decide what to do!....Randy 
09-29-2004, 05:01 PM
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Originally Posted by TTtop
Here is the dynograph of my lunati 383 with MTI stage III LS6 heads after adding the 90mm LSX intake, FAST TB & a Meziere EWP. The lower graph was before with an LS6 intake & ported TB. I have the R1 cam (232/236 .578/.575 112) installed straight up. Hope this helps you decide what to do!....Randy
Wow! nice numbers!Hopefully I could put up decent numbers with the Stg. 2 5.3L heads. If anything, based on your setup, I could get away with keeping the cam and upgrading the heads. Thanks!
09-29-2004, 05:20 PM
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Thanks, I think it turned out pretty good myself! 
The thing you will first notice the most will be the low-end torque pulling the car from idle on up more effortlessly than before. The second thing is that the motor won't spin up through the rpms as fast as a big cammed H/C motor.
With those 5.3 heads you'll probably see great low to mid-range hp/tq, but they may run out of flow on the top-end. That could easily be solved by changing cams to something a little more radical!....Randy
The thing you will first notice the most will be the low-end torque pulling the car from idle on up more effortlessly than before. The second thing is that the motor won't spin up through the rpms as fast as a big cammed H/C motor.
With those 5.3 heads you'll probably see great low to mid-range hp/tq, but they may run out of flow on the top-end. That could easily be solved by changing cams to something a little more radical!....Randy
