Take a look at my heads,cam combo.370ci,80mm
03-20-2011, 07:32 PM
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Take a look at my heads,cam combo.370ci,80mm I'm running a 370 iron block, forged rods/pistons stock crank.
My tuner speced out a 232/238, 595/602 lift on a 115 plus 4 lsa.
Due to money I want to run my current 241s that have been ported and polished years ago. I don't know flow numbers.
This wil be used with an ls6 intake and a bad *** comp turbo triple ceramic ball bearing 80mm turbo with billet wheel and 3.5inch dp. Its rated at 1250hp.
Im hoping for 850whp on 116 octane and 18psi through a locked auto and 9 inch.
What do you think will limit me if anything,heads not flowing enough?
How about that cam?
Alex
My tuner speced out a 232/238, 595/602 lift on a 115 plus 4 lsa.
Due to money I want to run my current 241s that have been ported and polished years ago. I don't know flow numbers.
This wil be used with an ls6 intake and a bad *** comp turbo triple ceramic ball bearing 80mm turbo with billet wheel and 3.5inch dp. Its rated at 1250hp.
Im hoping for 850whp on 116 octane and 18psi through a locked auto and 9 inch.
What do you think will limit me if anything,heads not flowing enough?
How about that cam?
Alex
03-21-2011, 02:45 PM
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Don't know any specs on the heads other than the shop I bought them from said there was $1700 in ported and polishing done. Could have bs.
Lets just say they have a mild port job.
manegment is stock computer,80lbs injectors,big rails,2 pumps. The usual.
Lets just say they have a mild port job.
manegment is stock computer,80lbs injectors,big rails,2 pumps. The usual.
03-21-2011, 03:52 PM
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I run 241's that were ported by Rapid motorsports on my 402 twin turbo. They netted me a 9.13 @ 151 mph at 15 psi so far. That was through a th400and a loose converter. I'm hoping for 8's when I get the motor rebuilt. (spun a bearing I think). Don't worry too much about hp. Worry about the times it runs, cause that's where it matters.....
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03-21-2011, 10:45 PM
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98Z28Cobrakiller is running a 232/232 .595 (TU2) with AFR 225's and 88mm going high 8's.
I'd be wary of running a conv split cam with only a 79mm turbine and 18 psi or more.
I'd be wary of running a conv split cam with only a 79mm turbine and 18 psi or more.
03-22-2011, 06:42 PM
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big cam = big turbine
not so great head = more boost
more boost = back pressure
79mm turbine = higher back pressure ratio (BPR)
higher BPR calls for a single or reverse split cam.
It just reaches a point of diminishing returns and cam should be adjusted to match.
Conventional split has good results, better results on big turbine setups -at least 87mm.
75mm turbine chokes a 355 at 5k w/18psi. -info is on TTF if you search for it-
232/232 will go 8's and drive better than what you listed....according to 98Z28....
Most upgrade heads and compressor later, buy cam once per engine.
not so great head = more boost
more boost = back pressure
79mm turbine = higher back pressure ratio (BPR)
higher BPR calls for a single or reverse split cam.
It just reaches a point of diminishing returns and cam should be adjusted to match.
Conventional split has good results, better results on big turbine setups -at least 87mm.
75mm turbine chokes a 355 at 5k w/18psi. -info is on TTF if you search for it-
232/232 will go 8's and drive better than what you listed....according to 98Z28....
Most upgrade heads and compressor later, buy cam once per engine.
03-22-2011, 08:57 PM
#12
Just because it's not what other people would or are running dosen't mean it wont make good power. Everyone tells me my little 215@.050 cam is way too small but it has no problem showing well over 1000hp down the track in a 4x4 truck. It just doesn't need a trans braker, 2step, or those other appraratuses to launch off a 3200rpm foot brake.
03-22-2011, 09:14 PM
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Just because it's not what other people would or are running dosen't mean it wont make good power. Everyone tells me my little 215@.050 cam is way too small but it has no problem showing well over 1000hp down the track in a 4x4 truck. It just doesn't need a trans braker, 2step, or those other appraratuses to launch off a 3200rpm foot brake.
What rpm do you shift at?
03-22-2011, 10:06 PM
#14
The small cam/small turbin is what I was trying to get at. I also run a Tc76 with a 68mm wheel.
Mid 9's at 4850lbs is also 8sec power in a 1000lb less of chassis. Thats not figuring in the wind, and parastatic losses from the truck, and 4wd running gear. Shift points are 6-6200, and hits the traps at 6800.
03-22-2011, 11:05 PM
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232/232 is good too. Imagen the driveability of the 215 with the A/C running in the summer, or the quick spoolup time when you don't have buddies at the track to hold the lights for you.
The small cam/small turbin is what I was trying to get at. I also run a Tc76 with a 68mm wheel.
Mid 9's at 4850lbs is also 8sec power in a 1000lb less of chassis. Thats not figuring in the wind, and parastatic losses from the truck, and 4wd running gear. Shift points are 6-6200, and hits the traps at 6800.
The small cam/small turbin is what I was trying to get at. I also run a Tc76 with a 68mm wheel.
Mid 9's at 4850lbs is also 8sec power in a 1000lb less of chassis. Thats not figuring in the wind, and parastatic losses from the truck, and 4wd running gear. Shift points are 6-6200, and hits the traps at 6800.
I got spec'd a 219/219 113 to peak at 6200 on a 6.0 w/317 n/a and shift higher of course assuming < 2.0 BPR. I asked specifically for a cam that would peak at 6200 n/a.
I've got the same 80mm turbo as OP NIB gathering dust in the garage. Waiting until I finish the truck and start on the next project (with the boys) to use it. Can't decide, but it looks to be a better match for a 347 for some rpm.
03-22-2011, 11:29 PM
#16
Is spool instant with the TC? Like 1800 rpm?
I got spec'd a 219/219 113 to peak at 6200 on a 6.0 w/317 n/a and shift higher of course assuming < 2.0 BPR. I asked specifically for a cam that would peak at 6200 n/a.
I've got the same 80mm turbo as OP NIB gathering dust in the garage. Waiting until I finish the truck and start on the next project (with the boys) to use it. Can't decide, but it looks to be a better match for a 347 for some rpm.
I got spec'd a 219/219 113 to peak at 6200 on a 6.0 w/317 n/a and shift higher of course assuming < 2.0 BPR. I asked specifically for a cam that would peak at 6200 n/a.
I've got the same 80mm turbo as OP NIB gathering dust in the garage. Waiting until I finish the truck and start on the next project (with the boys) to use it. Can't decide, but it looks to be a better match for a 347 for some rpm.
