The twin charged kits are mechanically limited to 20psi. We do this for customer protection. This is a good spot because beyond it you can run into a lot of limits.

The MAF is maxed. If you use a larger housing idle and economy suffers. If you use an AFC it adds cost.

The fuel pump is close to maxed, we like to have a margin of safety.

93 octane is close to it's limits and some customers have 91 or 92 in their area.


Anyway, testing a new MAF sensor we have with corresponding PCM changes allowed us to go just a little higher. 22psi is all the car will take on 93 octane and we wanted to see the power it would make. We also got a lot of flack for not starting the pulls sooner or not showing RPM so hopefully this chart is to hater liking



Notice from 2700 to 7200 the car is AVERAGING over 300 WHP and 300 ft/lbs. Damn!

 

Is it just me, or does this not look as smooth as all the other twincharge dyno's? Just that dip in TQ at 3200RPM, other than that looks good. Im def liking these kits for sure

 

^Im guessing around 3k is where the blower starts bypassing, and around 4k is where the turbo is getting near fully spooled. I may be wrong but I like to guess lol

Nice numbers ZZP!

 

what boost level was the 11.49 on?

 

12.6 afr damn... i thought i was pushing it with 11.9.

anyways nice numbers that thing is gonna scream

 

thats max AFR...right at the start of the pull

 

i was thinking it was where the car was at when it made that power... cant read zzp dyno sheets for some reason hahahaha

 

damn! nice numbers zzp.

 

lol. blue line - afr....and it says MAX afr right over the number you read. average AFR was 11.9, with a minimum afr of 11.6

 

27-28 matt said

 

so the average customer can expect much slower track times yes?

 

Id say if the car runs smoothly with no real drivablility issues and makes those numbers all on a stock engine, that's one hell of a job zzp... Glad you guys are doin it big!!!

 

im assuming if u have all the mods that 11.49 had im sure they will give you that much boost if you askit and realize the potential for destroyed parts. I think they are just covering there back so the stock internal guys dont just jack up the boost and blow ****

 

according to the post about the car's track times. it runs

11.5@128mph on 28psi, slicks and assuming 110 octane race gas?

and 11.7-12.0sec on 23psi, slicks and not sure if it was 93 octane or 110 on those passes.

 

my point was that unless you want to shell out the dough for the head work, a different trans, and the other stuff that was done, its semi-misleading to push the twin charge kit as a kit you can bolt on and run those kind of times. yes i know some common sense would be needed on the buyer's end, but we ARE talking about the cobalt crowd here.

dont read too much into that, im not taking anything away from the 11 second pass, there are just far cheaper means of obtaining the same kind of times a bolt on twincharge kit appears it will be putting down.

 

That is what I would guess too.

 

You guessed right. Starting the pull at not much past 2000 RPM resulted in the blower bypass opening a little sooner than normal. This can be adjusted in the PCM, but it's not really a big deal since most people don't race from 25mph in 3rd gear.

12.6 afr was just where the pull started.
The afr was 11.8:1 for most of the pull.

28 peak, but obviously much less in the beginning of the pass.

Ryan is running a stock head.
Ryan's trans swap is not making his car faster.
We never advertised that you can bolt on a twincharge kit and run 128mph trap speeds. I'm not sure where you are coming up with any of this. We advertise our twincharge kit to make 350whp. When customers email and ask, we guarantee 350whp. When we hit 388 on 93 octane with a recirculated wastegate and full exhaust system, then we have surpassed what we promised.

There are far cheaper means of obtaining the same kinds of times? "Far cheaper?" I doubt it.

 

1st, a trans swap to longer gears in the LSJ will help times i would think. the 1-2 split is terrible. i could be wrong, but it seems like it would help.

i was unaware that you guys advertised 350whp, i simply didnt know, my fault. i wasnt meaning this against you at all, i was more or less just stating people were going to be dissappointed if they put the kit on expecting similar numbers to the 11 second pass.

the twin charge kit costs $3,300.00, there are ways of running times equal to the twincharge kit for much less.

 

given that they just changed to a taller final drive, the gap between 1st and 2nd gear is just as long. If yu cmpare the gears using max MPH instead of RPMs then the gap between the two gears gets even wider

 

is it just the final drive thats different?

 

nice! keep it up

 

dont most people dyno in 4th gear? almost a 1:1 ratio... not tryin to start anything. jsut asking.

 

quite a few guys are doing it in 3rd from what i understand, to keep from stressing the motor so much

 

i see. makes sense now.

 

for reference, i did a pull in 3rd and a pull in 4th on a dyno a couple years ago and the difference was only like 3-5 hp and tq