1) When using HPT to tune spark timing, does the 105 kPa column in the PE spark tables actually work? If you're strictly using HPT to tune spark, this would be your one column for in boost right? What is the actual working range of our 1 bar MAP, 5-105 kPa?
2) What are some turbochargers that would build boost around 3500 rpm? Assume a ported/built head with comp cam's turbo grind. I was thinking GT3076R, but that may even start building around 3krpm. I want the higher boost threshold because the build will be a daily driver and some decent fuel economy will be maintained.
with a 1 bar i believe that is the column you use for boost.
12.33 @ 111.67 mph [Oct 2009]
Dyno'd on 08/02/09 - Mustang Dyno:
327.6 WHP 333.6 WTQ [10.1 AFR]
The gt35 gets full spool at 3500-4k on the ld9. Thats with a .63 ar exhaust housing. Using a .82 would let it go a little higher. Its a great turbo!
jmarks82 wrote:The gt35 gets full spool at 3500-4k on the ld9. Thats with a .63 ar exhaust housing. Using a .82 would let it go a little higher. Its a great turbo!
My conflict is that I wanted around 300 crank hp. That's a gt35r is at less than half its capabilities.
I'd like something like a T3/T4E 50trim, but I bet it would spool early. Maybe I need to think about a fancy electronic boost controler to limit boost at the threshold RPM that I choose... Anyone know of one that can do that?
I thought the Profec II Spec B could. You're able to dial in your boost threshold, but to what degree i'm not exactly sure. Google the Spec B to see what others have been able to do with it.
gt2860 should be fine for 300hp...or a gt3071
i have a t3t4 57 trim for sale along with the profec b spec 2 pm me
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24th MEU VMM-261 (REIN) V22 Crewchiefs
11 April 2012 Morocco (African Lion)
I can see where you're coming from man, I think the same way, but wanting to spool after 3500 is kind of a waste in my opinion. My car is spooled by around 2800-3000RPM with my Garrett T3/T4 60 Trim 0.63AR, and to be honest, unless I WANT to I am not making boost. I assure you that it will suit your needs exactly, and when you do want to get on it you don't need to wait as long. Turbo lag kinda sucks sometimes, other times I love it. But yeah, I'd definitely suggest aiming for the 2800-3000RPM range, I still get 31mpg AVG in my car and I'm not necessarily a light foot. Cruising around, you never really make boost but it's just a millisecond away when you do.
" To study and not think is a waste. To think and not study is dangerous. "
Dave Dunsmoor wrote:I can see where you're coming from man, I think the same way, but wanting to spool after 3500 is kind of a waste in my opinion. My car is spooled by around 2800-3000RPM with my Garrett T3/T4 60 Trim 0.63AR, and to be honest, unless I WANT to I am not making boost. I assure you that it will suit your needs exactly, and when you do want to get on it you don't need to wait as long. Turbo lag kinda sucks sometimes, other times I love it. But yeah, I'd definitely suggest aiming for the 2800-3000RPM range, I still get 31mpg AVG in my car and I'm not necessarily a light foot. Cruising around, you never really make boost but it's just a millisecond away when you do.
I was mostly concerned with part throttle tuning. I've considered adding an FMU (like 2:1), meth injection and possibley an extra injector controller. I should have noted I'm planning to build the head/cams and get a balance shaft delete kit and run 7500rpm or so. So it would have a healthy 3500-7500 powerband, but retain stock-like driveability and economy below that.
I see from your registry that you're running the portfueler. This is probably the most ideal set up retaining the stock ECU in conjunction with HPT, but it's also the most expensive. On the other hand, I can't see tuning a turbo ecotec on solely HPT and larger injectors - I wouldn't be happy with the part throttle/boost threshold tuning with alpha-n. There HAS to be some boost referenced fuel added by one of the sources I mentioned above.
It's a matter of reading up and considering all the options, but overall price is a factor. It will be DIY, but the head build alone is like a grand. Turbo and components are like another 1500 at least. Additional tuning devices (i have HPT already) could be minimal to another grand.
In any case, thanks for the options guys.
oldskool wrote:
I was mostly concerned with part throttle tuning. I've considered adding an FMU (like 2:1), meth injection and possibley an extra injector controller. I should have noted I'm planning to build the head/cams and get a balance shaft delete kit and run 7500rpm or so. So it would have a healthy 3500-7500 powerband, but retain stock-like driveability and economy below that.
I see from your registry that you're running the portfueler. This is probably the most ideal set up retaining the stock ECU in conjunction with HPT, but it's also the most expensive. On the other hand, I can't see tuning a turbo ecotec on solely HPT and larger injectors - I wouldn't be happy with the part throttle/boost threshold tuning with alpha-n. There HAS to be some boost referenced fuel added by one of the sources I mentioned above.
It's a matter of reading up and considering all the options, but overall price is a factor. It will be DIY, but the head build alone is like a grand. Turbo and components are like another 1500 at least. Additional tuning devices (i have HPT already) could be minimal to another grand.
In any case, thanks for the options guys.
In regards to part throttle tuning, I absolutely agree with you that it's annoying. I'm particularly anal when it comes to how the car drives, and before I got the port fueler I just wasn't happy with the tune I was able to do. But at the same time, I don't think that spooling a few RPM's earlier is going to make it that much more difficult to tune. I was actually wondering if you were planning on revving higher than stock, so I agree that you could get away with the higher boost threshold - but again, you're going to have about the same powerband length that you will need to tune with our worthless computer in this car.
So I'm just curious as to why you are building up the cavalier when you have the solstice GXP already; is it just for fun? Keep us updated with your build though - I'd love to see some picture posts when you get to that point.
" To study and not think is a waste. To think and not study is dangerous. "
This build is contingent upon the car running 14's as it is now. I'm moving to a place with nearly double the garage space and about 1/3 less price, with a roomate to split as well, so I'll have some extra money eventually. L61's are now plentiful at the junkyards, and you can find some good deals on aftermarket parts through ebay/classifieds if you are patient. I'm feeling more comfortable with my tuning abilities these days, having done two platforms over about a year and a half's time.
Cliff notes - I've become a more confident tuner/builder and will have a little extra money to play - it's a hobby afterall...
The solstice will be getting it's own attention in due time - either a gt35r swap or a DIY LSx swap kit and then another parts hunt begins..
You might consider our Super 20G turbo. It's gotten many street cars into the 11 second range, but still has superb midrange street performance. It tops out at 500 HP (about 430 WHP) and is a super performer in the 300-450 HP range. Very effective internal wastegate system included, which saves time and effort. We can also supply a very proven exhaust manifold.
Bill Hahn Jr.
Hahn RaceCraft
World's Quickest and Fastest Street J-Bodies
Turbocharging GM FWD's since 1988
www.turbosystem.com
