Im trying to put together a build on a c6 manual trans. I would like to do a head and cam package as well. Who is seeing the best results? APS TT kit or HP Kit, Ive seen some VERY Impressive Procharger cars on the sit so far. What kind of power am I looking at boost for boost? Ive gathered that 700hp is about the max for the stock ls2 motor? What do you guys think?
Boost for boost, the turbos will make a bit more power because they lack the load on the crank that is necessary for the engine to turn the supercharger with a belt.
The biggest difference is how the boost comes in on each setup.
With a centrifugal S/C, boost is linear.
At low rpm, you have low boost.
At high rpm, you have high boost.
With a typical TT setup, more boost is generally made lower in the rpm band, as the turbos spool up, so lower and mid range, there is usually a larger amount of torque available as opposed to a centrifugal S/C, cubic inch for cubic inch.
My car makes 500 rw torque at 3500 rpm and 600rw torque at 4600 rpm, on a stock 347cube engine.
Most centrifugal S/C's on a stock 347 won't make near 500rw torque until almost redline.
Some will say all that turbo torque down low is not controllable on street tires.
That is not true.
You just need to know the limitations of the rubber you are riding on.
I personally prefer the lower rpm torque available from a TT setup.
(Caveat- some of the Centrifugal 402 setups by ECS and A&A make really big torque lower in the rpm range, but those are much more extensive than a stock LS2; I'm still totally impressed by these setups!!)
You can not go wrong with any of the FI setups currently available from any of the better known tuners out there.
For centrifugal S/C- ECS, A&A, EPP, etc.
I'd definitely suggest buying your S/C kit from one of those shops who actually builds and supports them.
As far as max HP on a stock LS2, there have been people who've approached 700rwhp, but who knows how long it will stay together?
If it stays free from detonation, it may last a while, but all the other internal engine parts are taking a beating from the increased torque, and sooner or later something may break.
I'd say a good tune would allow you to approach 600rwhp (about 650 flywheel) and enjoy it for a while, provided you're not beating the crap out of it on a daily basis.
Do your own thorough research on this forum in the FI sections and you'll have all the info necessary to make a good decision.
__________________ 2002 QS MR Z06 APS TT RPM/Quicktime Blowshield, RPS Triple Carbon Clutch, DTE Brace and L&R Shafts, FJO Wideband, Full 3" exhaust w/LGMotorsports Big 3" Mufflers & 3" High Flow Cats 560rwhp 570rwtq
Mustang Eddy Current Dyno Results
60-130 6.89secs Performance Box GPS verified
Im trying to put together a build on a c6 manual trans. I would like to do a head and cam package as well. Who is seeing the best results? APS TT kit or HP Kit, Ive seen some VERY Impressive Procharger cars on the sit so far. What kind of power am I looking at boost for boost? Ive gathered that 700hp is about the max for the stock ls2 motor? What do you guys think?
Fuel octane will be the limiting power factor on a stock LS2 engine..............if you're runing 93 octane with with some meth injection you can confidently run 600 rwhp/600 rwtq with the C6 intercooled twin turbo system.
Fuel octane will be the limiting power factor on a stock LS2 engine..............if you're runing 93 octane with with some meth injection you can confidently run 600 rwhp/600 rwtq with the C6 intercooled twin turbo system.
Peter
I have a CoolingMist kit coming soon; the goal is exactly as above. Make about the same amount of power as I am now, just more safely.
I gotta stick to the ProCharger set up. Since November I have had a 745 rwhp car with no motor problems at all. The key to SC is doing it right the first time. Instead of going single nozzle on the meth, go dual. Use a three bar instead of a MAF for tuning. I suggest head studs or bolts also. And finally, do the intercooler mod so that you have no heating issues.
Thanks alot for all the info. Im not new at all to the FI world but very new to the corvette. I use to have a turbo 04 cobra. I really love the turbo setups as you can change boost so easily and the power is always there on a turbo setup. Who is seeing the best results in the turbo setups on these C6s? The APS kit looks very solid, but our shop has also done a HP Performance kit and that car moves! Anyone have any first hand Expierience? If I were to do a Aftermarket head to lower the compression and do a turbo cam, would that prolong the shortblock?
Thanks alot for all the info. Im not new at all to the FI world but very new to the corvette. I use to have a turbo 04 cobra. I really love the turbo setups as you can change boost so easily and the power is always there on a turbo setup. Who is seeing the best results in the turbo setups on these C6s? The APS kit looks very solid, but our shop has also done a HP Performance kit and that car moves! Anyone have any first hand Expierience? If I were to do a Aftermarket head to lower the compression and do a turbo cam, would that prolong the shortblock?
Turbo Cobras are bad ass! Lowering compression would allow you to run more boost, but I don't think that would be any different than running low boost on stock compression as far as engine life is concerned... I personally went with the APS kit over the other manufacturers for the following reasons:
- I was very familiar with APS' quality from the Subaru world
- I like the turbos as close to the manifolds as possible
- I do not like cats before my turbos (STS)
- I don't like my turbos visable from outside the car (STS)
- I do not like the idea of turbos in my plastic fenders (HP)
- I dont need a kit that is CARB approved
Thay are all good, but in my opinion, for what I'm using the car for, APS was the best.
I am reading the whole thread and I am still confused as to what the ultimate answer is!
I am looking at trying to get no more than 600 RWHP (Would be happy with 550) on a C6 2005 M6. Is the twin turbo better than a supercharger? Then, which one?
Is it true that the boost on turbos can be adjusted "easily"? I know that the boost from superchargers cannot really be changed without changing pullies...
The other option would be to "live" with only doing cams and ending up with 420 RWHP or so.
Can I do the cams and then later down the road do a turbo or supercharger? Is that even possible? Would I be wasting my $2500 or so on the cams?
This grabbed my attention. I am looking into the APS kit for my C5 soon however just to be on the safe side I did want the car to still be able to pass emissions. Is your kit not carb approved because you're not running cats or all the APS systems just will not pass the smog tests? Thanks !!
This grabbed my attention. I am looking into the APS kit for my C5 soon however just to be on the safe side I did want the car to still be able to pass emissions. Is your kit not carb approved because you're not running cats or all the APS systems just will not pass the smog tests? Thanks !!
thegame, as far as I know the APS kit will pass OBD II tests with cats. I do not think it will pass CARB (in California). Double check with APS on that. This has not stopped a ton of guys in Cali from doing the kit.
Quote:
Originally Posted by seb71
I am reading the whole thread and I am still confused as to what the ultimate answer is!
I am looking at trying to get no more than 600 RWHP (Would be happy with 550) on a C6 2005 M6. Is the twin turbo better than a supercharger? Then, which one?
Is it true that the boost on turbos can be adjusted "easily"? I know that the boost from superchargers cannot really be changed without changing pullies...
The other option would be to "live" with only doing cams and ending up with 420 RWHP or so.
Can I do the cams and then later down the road do a turbo or supercharger? Is that even possible? Would I be wasting my $2500 or so on the cams?
Thanks.
seb, if you want 550-600 whp and the ability to make more easily, then you can definately go TT.... or S/C. Really, either path will get you there. You can make that power on the APS kit with 8-10 psi all day long, and have awesome low-mid range torque and massive top end. I am obviously a little bias, but I try not to be. You can easily adjust boost with a turbo setup, however when doing so (more than 1psi+) I'd reccomend tuning aftarwards...
Now im you want to do a caM (singular, remember we only have one ), you can definately do that. You can pickup a comp cam with springs and retainers for around $800 or so plus install. I had installed a comp cam before my APS kit (.228/.232, .588.595, 114lsa) and picked up 43 RWHP. You can definately do a cam first (although for street drivability, I wouldn't reccomend much bigger than mine.) Just remember, if you do/have longtube headers, you can only use them with a S/C or the STS kit...
thegame, as far as I know the APS kit will pass OBD II tests with cats. I do not think it will pass CARB (in California). Double check with APS on that. This has not stopped a ton of guys in Cali from doing the kit.
seb, if you want 550-600 whp and the ability to make more easily, then you can definately go TT.... or S/C. Really, either path will get you there. You can make that power on the APS kit with 8-10 psi all day long, and have awesome low-mid range torque and massive top end. I am obviously a little bias, but I try not to be. You can easily adjust boost with a turbo setup, however when doing so (more than 1psi+) I'd reccomend tuning aftarwards...
Now im you want to do a caM (singular, remember we only have one ), you can definately do that. You can pickup a comp cam with springs and retainers for around $800 or so plus install. I had installed a comp cam before my APS kit (.228/.232, .588.595, 114lsa) and picked up 43 RWHP. You can definately do a cam first (although for street drivability, I wouldn't reccomend much bigger than mine.) Just remember, if you do/have longtube headers, you can only use them with a S/C or the STS kit...
Who is making a good turbo cam for these cars. And what type of heads are guying running on these tt setups. I hear AFR alot on the boards, is that what everyone is running? Where can i see some pictures or specifiication on this ttix kit?
Corvette Store
Procharger vs. TT
Listen to this guy, he knows his stuff. 
Really, either path will get you there. You can make that power on the APS kit with 8-10 psi all day long, and have awesome low-mid range torque and massive top end. I am obviously a little bias, but I try not to be. You can easily adjust boost with a turbo setup, however when doing so (more than 1psi+) I'd reccomend tuning aftarwards...
