Wait a second, this car is in NY?

 

yes with my fab/tuner BTF.

Honeoye, NY

 

thats like 30 mins from me. Looking forward to seeing what kinda numbers this thing puts down!

 

currently at 37psi.....

good news: Turbine pressure is only 1.5psi higher than compressor pressure.

bad news: with the current boost pressure, the AC delco plugs 41-108 gapped 0.035" are not cutting it.


will need colder plugs.....

 

Will need to gap down most likely.

 

Are you getting blow out with them gapped at 0.035? A lot of ppl run 0.032 for a ko4 lnf running 22-26psi. Or is a EGT/hi cylinder temps issue?

 

Stock plugs gapped at .028 here

 

How's the spool on this setup?

 

just blowout....so probably we can gap it down to .028

 

thats what I originally have w/ my gt35...and works flawlessly.


but we changed the plugs to new ones w/ this new set-up.

so we should try re-gapping it to .028


it will spool like a gt28 on a 2 liter engine.


so probably just only a tad slower than the k04

 

it will spool like a gt28 on a 2 liter engine.


so probably just only a tad slower than the k04

 

So around 3k? Thats crazy to spool that quick with so much power

 

At 37 psi or more with the kind of cylinder airmass, cylinders pressure and cylinder temperature I would squeeze them down to 0.024-0.026" Keep the stock plugs for now I have always had bad luck with other plugs causing minor misfires on LNFs.

 

Yeah, planning around 45psi.

Still observing the interactions between the turbos right now, even before adding timing.
Also observing The pressure of the turbines vs compressors.

Thanks for the input. I'm a bit Leary of using those other plugs as well.

We'll see what happens with decreasing the gaps of the plugs...

 

Around that rpm range.....

And yes, that's the reason of this build, to virtually eliminate lag in a high powered turbo system.

I got tired driving the gt3582r set-up, due to its lag ....

 

I knew a compound setup will spool quick but didn't know that quick that awesome I bet it's gonna be a handful to drive. Does it build the boost smoothly or is it a light switch?

 

it should build boost smoothly, not an ON/OFF light switch like the big turbo ecotecs.


it will react as an ecotec w/ a smallish turbo (gt28).........but the power doesn't fade at the higher rpms....since it will just continue to go up while the big turbo is singing.

very wide power curve.....

 

this is the latest log of BTF

according to him, somewhere burried in the tables......there is a hysteresis check.

If VE flow exceeds MAF by a dictated amount, it tells the Bosch PCM to dump fuel despite what the 02 sensor is telling it.

Even with the addition of the secondary fuel system (additional PI injectors), you can only cheat the MAF so far, before it realizes it


anywho............the combo of 93 pump gas (DI) and e85 (PI) combo is still looking good.
36 psi with no knock....

 

DYNO UPDATE:

yesterday, car was strapped onto the dynojet.

it only made 480whp SAE corrected on 30psi of boost


anything boost higher than that, we just lose power due to fueling issues.
DI injectors are maxed out at this level with 20% fuel from PI.

MAF is half the level of VE then the PCM starts doing crazy shiit.

It starts jacking the load% up even though it is not lean. Then PW of DI starts going up..and it misfires.


We need to sort out this fueling issue........in order to boost to around 45psi, which will give me another 150 horses which will be my goal.


Since Matt of ZZP is the only one with LNF who broke 700+whp sae corrected, I asked him how he was able to supply enough fuel on his cobalt (stock DI injectors, large fuel lobe, and 5th injector (80lb).

As usual, Matt is helpful enough to give me some tuning tips and feedbacks.

Thank you matt! You have given me a lot of help for a couple of years now!



My stage 1 cam w/ big fuel lobe and PI injectors are not enough.
So today, I bought a set of those bigger opel injectors. This set of injectors are 14% bigger thank stock...and will help keep the PW to 8ms.

 

Love reading your updates. Sorry to hear about your fueling troubles. My next mod will be installing those opel injectors which I have already along with either S1 or S2 cams with the bigger fuel lobe. Not that I have your power ambitions, but I'm pretty much maxed out on fuel right now which is too scary. Breaking the 500whp will just be a nice side effect for me ;-)

 

Damn DI drama

 

I'll be happy if I get something close to 600whp

but 500whp.....with early spool is not bad too.

We are just cautious w/ the k1 rods not holding up during 600whp runs.

so we'll see how it goes....still a lot more to go in tuning, unfortunately.

I hate drama!!!

 

Did you have any luck changing the plug gap? When I went to the ZFR I gapped mine down to .030" and it cleared up a lot of issues versus keeping them at .035". After reading a thread or two on here with people claiming they made more power on a big turbo by gapping their plugs down to <.028" versus .030 I think I'm going to gap my plugs down to .028" and play with that.

 

my previous set-up (gt3582r), we also gapped down to .028, and it gave me an instant 30whp )

on this set-u, we already gapped it down to .028.

issue we are getting is our DI injectors are maxed out....

 

I wouldn't have guess that you were still on the stock injectors not the Opels after all that you had done to it