STS Dyno #'s
#5
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I made 425 rwhp at 5 psi on the stock motor, so something is definitely not right. But, we need more info. What did the a/f look like? What compression is the motor? That's at least a start.
#6
The motor im running is at 8.8:1 compression. Im running 6.0 heads and a custom turbo cam, 223,225,115+4. Im not running an intercoller, and I have the stock 60-1 turbo. Im guessing that my problem might be a boost leak, but my guage reads that im getting 8.7 lbs of boost. Ill try to post my dyno sheet. The motor that I had put in was built by HPE.
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Originally Posted by JD_Z28
I was very dissapointed with the number I put out. 346 built with 6.0 heads and a custom turbo cam wit 8.7 lbs of boost, 405 hp and 420 torque. this is on a 2002 Camaro. What could be the problem?
So...tuning and lack of/ too much fuel could be the problem....and probably IS the problem. You need a laptop and a wideband hooked to the car on dyno pulls to see what exactly is going on. I thought I was getting plenty of fuel with 42lb injectors and a 255gph in-tank pump + hotwire kit. Well, no I'm not. I'd also never heard of other STS users switching to boost referenced FPR's.....but a lot of front mount guys do. Makes you think.......
Also make sure that everything's hooked up right and you are not sucking oil into the intake piping. Sucking oil into the intake pipe and setting off the oil buzzer are NOT one in the same thing. Did that once....and the MAF had oil on it. The PCM then pulled massive amounts of timing which of course murdered the HP.
Anyhow, you have TONS of potential with the described setup. Working the bugs out is a frustrating process (welcome to FI ), but with patience and a scientific approach you'll find the prob (or problems)......and the car will be smokin fast after. Good luck and hope this helps.
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Originally Posted by GR33N GoblinM6
did you guys notice his CR was 8:8:1??? crank it to at least 12psi... your compression ratio was way low
I made 383rwhp and 378rwtq naturally aspirated on my 8.1 compression motor.
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cant 76 an STS with a 346... I dont think its fuel either... I think its the low compression engine, heads (even lower compression).... I would even say 60# injectors... get a walbro 255... intercooler... get your 60 turbo reworked to a 67 or 70 (Dont remember how big you can go) and crank the boost up to 15lbs...
I think you could do 15 lbs on 93 octane with a 67 (8.6:1 CR) and see 650-700 RWHP... But I am no expert.
I think you could do 15 lbs on 93 octane with a 67 (8.6:1 CR) and see 650-700 RWHP... But I am no expert.
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I made 475 rwhp on the 60-1 (at 8psi). The dyno graph wasn't pretty, but it made that #. You have a couple of limiting factors in your setup though. As you start to up the boost, without an intercooler, you're not going to see the gains you should see. Do you have any record of what your IAT's were on the dyno? And you definitely don't want to go to high on the boost without upgrading the fuel system. I didn't notice anywhere...what size injectors are you running?
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Originally Posted by JD_Z28
The motor im running is at 8.8:1 compression. Im running 6.0 heads and a custom turbo cam, 223,225,115+4. Im not running an intercoller, and I have the stock 60-1 turbo. Im guessing that my problem might be a boost leak, but my guage reads that im getting 8.7 lbs of boost. Ill try to post my dyno sheet. The motor that I had put in was built by HPE.