Bro, if you're running 220 hp and you lost to "schwv", I can only imagine what his dyno numbers must be!!!

 

What was the BARO pressure, ambient temperatures and SAE correction factors?
You could of made these pulls on a cold winter's night in Death Valley!!
(then they wouldnt be so impressive)
WopOnTour

 

Tofu, Nice Numbers... I still enjoy Showing my SRT and TurboDodge buddies (I also own an 85 Daytona TurboZ W Stage II Logic Module) that Video you made a while back.

Congrats,

Sean

 

Lol, no idea, I just slipped the dyno man a $20 and told him to do some "inflation". just kidding.

 

Nice numbers. They would be lots better if you wern't at a 10:1 A/F at 6k rpms. And its still making power when you have to shift. Fix those two problems and you will hit 240~250.

 

Hmm...I don't understand whats going on with the dyno and gear difference.

I've always understood that dynoing in a gear BEFORE the 1:1 gear will give lower power numbers. I've seen that with alot of cars including mine. But I've never heard of it giving you higher power numbers.

But I've also seen some dynos not make a difference between the gears. Which I guess is the dyno actually correcting for that. And I'm sure the different types of dynos make a difference there.

And your A/F really needs to be closer to 11.8:1 for max power. 10:1 is just choking the motor, not keping it cool, lol.

The only difference I can think of with the gear you used in each dyno, is possible the heat soak. Running it up through 2nd gear won't generate as much heat as it would running it up all the way through 3rd gear. But whether that heat difference is enough to rob that much power is the question.

 

What kind of Dyno? Brand?

 

(.)(.)

 

Tofu... u got a CEL? or you're one of the lucky ones?

 

It was a Dynojet.

 

LOL, not lucky at all, I've got two of em! The "engine running lean" and "PCM internal Malfunction".

 

Tofu,
That PCM malfunction code is very bad! Get it fixed ASAP! We just had a Tiburon in our shop that blew the engine with this code. I ran the car lean for months a killed the engine.

 

wait a sec!!!!!!!!!!!!! can our ss/sc with lean codes, blow our motors!!!

 

Most likely NO with the P0171 system too lean. The PCM malfunction code(DTC)however is very bad because thaty mean the brain of the care is retarded or sick.

 

the way ive always known it, you dyno as close as you can get to 1:1 without going over...hence third gear...ive taken a look at third and fourth in my car, third seems to be pretty close at low rpms and fourth is closer at high rpms...so i would go with third personally...i know in my accord it was 4th dead on...and in the rsx it was 4th or 5th, cant remember...

 

You just contradicted yourself. 4th is closer to 1:1 then 3rd is so why dyno in 3rd?

 

Without going over he said. Like the price is right.

 

4th is a tick lower than 1:1 closer than 3rd

 

I can't wait to dyno my car after my exhaust comes in! Nice numbers! Seems our cars respond well to mods!!!

 

depends on whos numbers for the tranny you are reading...ive always seen 4th gear being over though...

ok found it...if you look here...

http://www.chevrolet.com/cobalt/specifications/

then click transmission... youll see that 3rd is 1.35 and 4th is .98...

now with transmissions, the numbers decrease through gears...therefore you would want to stay (in essence of number sake) above 1:1...but this is called "over" by most.

not that gear really matters anyway...a dyno measures how the car overcomes the load given by the dyno. the difference in gears would only mean a hp or two difference either way and that is about the same difference you would get from pull to pull...

 

That be fine, except those gear ratio specs have been known to be WRONG forever now. If you look closely they are actually showing the same rations as the Getrag F23 in the non-supercharged Cobalts and IONs (and the J-bodies for that matter)

More accurate ratios for the FGP Model F35 used in the Cobalt SS/SC and ION Redline can be found here
http://www.gmcanada.com/english/vehi...coba_opti.html
or here
http://media.gm.com/us/powertrain/en...g%20trans.html
So 3rd is 1.18 and 4th .89 so 4th is STILL closer to 1:1 but not by the margin the Chevy web-site states
HTH
Regards
WopOnTour

 

ok, even still...its third without going over...that .07 difference of a longer gear is why 4th is such a difference...