Turbo cam recomendation from Cam Motion
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From: Monticello, Kentucky
Turbo cam recomendation from Cam Motion I've got a turbo cam recommendation from Cam Motion and just wanted to post up and get some opinions before I buy. My setup details I just copied from an e-mail so I wouldn't have to type it out again.
> >No emissions
> >approx 3400 lbs
> >3.08:1 gear
> >TH400 w/brake, Mary Chance will be building the stall around the cam
> >26" tire
> >stock PCM, SD tune
> >
> >single GT 47-80 turbo
> >4" downpipe
> >
> >6.0 iron block, 364 ci
> >8:1 compression
> >JE pistons, 4340 rods
> >LS6 intake
> >1.75 roller rockers
> >ported 853's, approx 210cc intake ports, 2.00" 1.55" valves, 67cc chamber
> >intake flow numbers are:
> >3.900" bore
> >
> >0.05 39.1
> >0.1 70.6
> >0.15 104
> >0.2 142
> >0.25 177
> >0.3 209
> >0.35 226
> >0.4 246
> >0.45 261
> >0.5 266
> >0.55 272
> >0.6 279
> >0.65 285
> >0.7 289
> >0.75 295
> >
> >
> >
> >Other small details: hydraulic roller of course, 96# injectors, primarily
> >street car, 93 octane most of the time, might use 110 and some increased
> >boost for strip. Looking to acheive an optimal DCR and still use the 93.
> >I
> >
> >don't want to turn this thing beyond 7000 and I am guessing low end won't
> >matter with this turbo. Looking to make max power and still be
>streetable.
RECOMMENDATION
Grind Number X2202-2123-15+5
Duration (intake/exaust) 226/220
Lift (intake/exaust) 572/560
Lobe Center Separation 115
Intake Centerline 110
> >No emissions
> >approx 3400 lbs
> >3.08:1 gear
> >TH400 w/brake, Mary Chance will be building the stall around the cam
> >26" tire
> >stock PCM, SD tune
> >
> >single GT 47-80 turbo
> >4" downpipe
> >
> >6.0 iron block, 364 ci
> >8:1 compression
> >JE pistons, 4340 rods
> >LS6 intake
> >1.75 roller rockers
> >ported 853's, approx 210cc intake ports, 2.00" 1.55" valves, 67cc chamber
> >intake flow numbers are:
> >3.900" bore
> >
> >0.05 39.1
> >0.1 70.6
> >0.15 104
> >0.2 142
> >0.25 177
> >0.3 209
> >0.35 226
> >0.4 246
> >0.45 261
> >0.5 266
> >0.55 272
> >0.6 279
> >0.65 285
> >0.7 289
> >0.75 295
> >
> >
> >
> >Other small details: hydraulic roller of course, 96# injectors, primarily
> >street car, 93 octane most of the time, might use 110 and some increased
> >boost for strip. Looking to acheive an optimal DCR and still use the 93.
> >I
> >
> >don't want to turn this thing beyond 7000 and I am guessing low end won't
> >matter with this turbo. Looking to make max power and still be
>streetable.
RECOMMENDATION
Grind Number X2202-2123-15+5
Duration (intake/exaust) 226/220
Lift (intake/exaust) 572/560
Lobe Center Separation 115
Intake Centerline 110
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Well I am running 1.75 rockers so that lift number might be more like .590" but I'll have to check to see how they spec'ed it. I feel like maybe they should spec it again so that's why I posted up.
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I am really not a believer in the reverse-split turbo cam. Just look at my 224/236 cam with a T76GTS on a 388 LT1. Works well and that's a pretty extreme conventional split.
Also, I think it was Speed Inc. that built a turbo 370 LSx with a medium frame 80 mm turbo. The thing made almost 1000 rwhp through a TH400 using a cam that was 236/242-112.
Mike
Also, I think it was Speed Inc. that built a turbo 370 LSx with a medium frame 80 mm turbo. The thing made almost 1000 rwhp through a TH400 using a cam that was 236/242-112.
Mike
Last edited by engineermike; Mar 18, 2007 at 12:58 AM.
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Okay, found it:
https://ls1tech.com/forums/forced-induction/429231-994rwhp-863rwtq.html
370 LSx, AFR225's
T88 turbo at 22 psi boost
994 rwhp through an unlocked TH400
Cam: 236/242 - 112
Copy this.
Mike
https://ls1tech.com/forums/forced-induction/429231-994rwhp-863rwtq.html
370 LSx, AFR225's
T88 turbo at 22 psi boost
994 rwhp through an unlocked TH400
Cam: 236/242 - 112
Copy this.
Mike
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Originally Posted by engineermike
I am really not a believer in the reverse-split turbo cam. Just look at my 224/236 cam with a T76GTS on a 388 LT1. Works well and that's a pretty extreme conventional split.
Also, I think it was Speed Inc. that built a turbo 370 LSx with a medium frame 80 mm turbo. The thing made almost 1000 rwhp through a TH400 using a cam that was 236/242-112.
Mike
Also, I think it was Speed Inc. that built a turbo 370 LSx with a medium frame 80 mm turbo. The thing made almost 1000 rwhp through a TH400 using a cam that was 236/242-112.
Mike
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Originally Posted by SSilverSSurfer
from what i understand a log style header would be better suited for a reverse split cam than a traditional header. certain kits like different splits. i dont know where i read that but maybe someone will chime in and correct me if im wrong.
Secondly, I keep hearing and reading that you have to altar the split depending on how much backpressure you have. However, I have never seen any dyno testing using multiple cams to prove any of these theoretical trends. Until someone posts said info, I'm not buying that a reverse split is EVER better than a single pattern or a conventional split.
Mike
Originally Posted by engineermike
First of all, I am using a 224/236 cam with a log header.
Secondly, I keep hearing and reading that you have to altar the split depending on how much backpressure you have. However, I have never seen any dyno testing using multiple cams to prove any of these theoretical trends. Until someone posts said info, I'm not buying that a reverse split is EVER better than a single pattern or a conventional split.
Mike
Secondly, I keep hearing and reading that you have to altar the split depending on how much backpressure you have. However, I have never seen any dyno testing using multiple cams to prove any of these theoretical trends. Until someone posts said info, I'm not buying that a reverse split is EVER better than a single pattern or a conventional split.
Mike
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From: Monticello, Kentucky
Originally Posted by eLTwerker
dhdenney and engineermike: what are the valve events @.050 of your turbo cams?
Not sure on mine because I just got the recommendation Friday evening. I was kinda surprised to see the reverse split too as I had read before that a single pattern and even the conventional split was probably better suited to an LSx motor.
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Originally Posted by engineermike
Okay, found it:
https://ls1tech.com/forums/showthread.php?t=429231
370 LSx, AFR225's
T88 turbo at 22 psi boost
994 rwhp through an unlocked TH400
Cam: 236/242 - 112
Copy this.
Mike
https://ls1tech.com/forums/showthread.php?t=429231
370 LSx, AFR225's
T88 turbo at 22 psi boost
994 rwhp through an unlocked TH400
Cam: 236/242 - 112
Copy this.
Mike
Last edited by dhdenney; Mar 18, 2007 at 11:50 AM. Reason: typo
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Originally Posted by eLTwerker
dhdenney and engineermike: what are the valve events @.050 of your turbo cams?
EVO 56
EVC 0
IVO 2 Before TDC
IVC 42
Cammotion recommendation to dhdenney:
EVO 50
EVC 10 Before TDC
IVO 3 Before TDC
IVC 43
Speed Inc 370 turbo cam
EVO 57
EVC 5 After TDC
IVO 10 Before TDC
IVC 46
cam If it was me, I would call comp cams and see what they reccommend. I built a motor several years ago for a nitrous fed 406 s10 and they reccommended a great cam that made excellant power for the combo. Just my 2 cents, Josh
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Originally Posted by dhdenney
I I called Speed Inc first about a cam and they were kinda black and white on it. It seemed like my only two options were their 225/225 (TU1) on the website and a 234/234 with Xtreme RPM lobes. They didn't seem to give an in-between option. That cam was never brough up to me.
Originally Posted by dhdenney
Thanks for that info. What are your specs if those are shareable?
Mine is single pattern in the low 220 duration. However, my setup is no where close to yours. I think Patrick did a great job tailoring the cam to what I wanted, and he is available for follow-up questions and a little tuning advice too.
Originally Posted by dhdenney
I had seen this before and studied it some. I called Speed Inc first about a cam and they were kinda black and white on it. It seemed like my only two options were their 225/225 (TU1) on the website and a 234/234 with Xtreme RPM lobes. They didn't seem to give an in-between option. That cam was never brough up to me. I called W2W for about a week and couldn't get anyone to return my call or e-mail. I finally got someone and they would "do it late today or tomorrow." Well that never happened so I called Cam Motion.