As I have been posting in the thread Intermittent boost problem, I have been having a ruff go with my SS with Stage 1.

I only get 5-7psi in first gear & under 200 ft lbs of torque
2-5 gears I get the full 15-20psi & full 320+ ft lbs of torque

I should get full power and boost in all my gears, just as it always has.

Please vote, accordingly.

Post explanation and/or response as well.

 

Mine has always hit 20 in first,since the stg1 before the IC and HSpipes it would be hard to hit 20 in higher gears. Since the bolt ons, 2nd hits 20 easy and runs up over 80 so, I don't know about third or fourth yet. Thats why I'm going to the dyno to get tuned. Don't want to do a data log at 140. Ha Ha

 

That's what I'm saying man.

The stage one is to make the pre-determined power/torque in the gears. It's not a boost increaser... it's a power increaser. It just happens that it makes more boost to get the increased power.

On mine... one day... poof... no more than 5-7psi in 1st gear.

 

With my tune i have boost reduced to 7psi in 1st gear since full boost would be pointless and than from 2-5 im at full boost

 

Same as Bart for first, second is at 15 then 3rd thru fifth is full 26 form 3000 to 6200

 

Best relevant question here is: manual or auto trans Gas Man? Best thing is to compare w/ the same tranny you have IMO.

Later
Allex

 

I was under the impression that the GM tunes didn't give full boost until 3rd gear.

 

Here is something I found from a GM Engineer on the Upgrade kit.

#1 The upgrade kit does not do anything under 2500 RPM. This is to maintain the engine life. The manual transmissions have been reported to fracture the case due to excessive wheel hop. The upgrade kit does not change the transmission calibration in any way.

#2 Power is peaking at 4800 to 5100 rpm. The trans cal is made to take advantage of the torque curve.

#3 There is no difference in the calibration for the decel enleanment. Throttle position is what is used to shut the fuel off.

Either way PSI means little as that is not an indicator of power going to the wheels.

Note even on the no lift shift the PSI stays up but the power is not going to the wheels when you clutch it. Engine management is in effect in first geat and limits power to the wheels. This is why second gear is the one that has the most pull.

First the tranny would not last much with full power in first gear and second FWD cars have enough issues hooking up with the weight transfer. You take off hard the front wheels unload.

Few of us know what the management programs really do as GM rarely speaks on them in detail. Either way the trannys in the HHR were never intended for this much power and are very well protected. Just don't judge the power by the PSI as odds are it is not all going to the wheels.

 

elevation has alot to do with it also......+ I got the HP Tuners on top of my GM Stage 1 as well.... I always see 24+ in all gears maxed out at 28PSI..trust me 30 PSI you got limp mode....

 

So what does the speedo say when the boost is 26 in 5 gear at 6200 rpm ??