I have sort of mixed feelings about my track visit today, first visit with the turbo set up. The good news is I was able to get the 60' times down to 1.745 and 1.713 on my two good runs. Using the M&H slicks at 11.5psi dumping at 6k and just short of power shifting 2nd, boost controller set at 14.5psi, but with no juice! However on the big end she is sufering, traps were consistant 108mph range and ets were 12.5sec. I really think the timing on the JWT ECU is too conservative, my EGTs were in hitting 920c but AFRs were steady at 11.1, this points to too little timing advance. Having a 2.5" flex section before my 3" exhaust is choking me I'm sure. Injector duty cycles were 96% peak and TT-MAFv was 4.69 with 15.3 psi spike, so I cant crank up the boost anymore until I switch to 740cc injectors. Excuses excuses, fast but not fast enough for me, Ive got more work to do

 

Wow

 

Nice to hear it hauls some a$$. good luck making it faster.

 

Not to say your time is bad cause 12's in anything is bada$$, but Requin6 ran a 12.9 at 111 i believe with s/c at 11psi and still had stock cat-back. So once you get all the details sorted out you should be in the 11's for sure, right? Also what kind build up did you do to the internals in there? NOw you need to go show some ZO6's whats up!!!

 

12.5 is slow for a guy when he has tasted the time of 11.9.

 

12.5 @ 108 not to bad but i think your right about the traps i expected to see somthing more like this

12.5 @ 115

and with spray 11.5 @ 125

you need to get to a dyno because those traps point to a some what lower than expected whp maybe 350whp but at 15psi that seems quite abit low but timing could have alot to do with that



i guess you cant really put the stock ecu backin to see how it would run

 

hes on stock internals

um Z06 vettes on average trap @ 115 to 116 so 108mph aint ganna cut it

 

3 inch downpipe, to 2 1/1 inch flex section to 3 inch exhaust? Can you tell from the e-manage how much timing is getting pulled?

 

The emanage will not tell you how much timing is being pulled. It will only show the amount of timing that you are pulling out of it using the emanage. MAtt I do agree with subs. I was thinking on my way home that maybe you should dyno that car at SRT to see what the car really is doing right now.

 

How are you running 14.5psi on stock internals. Is it that you have the J&S safegaurd?

 

Leme get the exhaust opened up, and AFR up a bit and see how he feels. I will also be trying the stock ECU again for the timing issue. No need to dyno just yet, 108mph shows it all, even my two crapy cold launchs were 108mph. When I switched from my 2.5" to 3" set up I picked up 30whp, when I added the Geforce ECU to the SC set up I picked up 20whp, thats 50whp right their. Ive got some work to do before I dyno.

 

its all in the tuning.

 

What about hooking up a ODB reader and seeing what timing is? It wont show you what emanage or J&S are doing to it, but it will show what the ECU is advancing, yes?

Glad you're getting to play some, it'll be awesome once you get the bugs worked out. We should have a track day somewhere between us here in the future - I'd love to check your setup out.

 

Yep I was thinkin the same thing, A buddy of mine has my cable I just need to get it back.

We need trailers.

 

so there is away to see the exact timing that is being pulled?

 

Only with an OBD reader

 

740cc Injectors are on their way, whoot!
These should be good for 600whp, the current ones were maxed out at 418whp, rough calculations based on dutycycle, but still in the ball park.

 

GREAT runs.



And DAMN 740cc injectors... wow.. what kind are they? 4th gen or 5th gen fuel rail?

 

4g, 300ZX-TT

 

Good to see you got it out to the track.

I'm curious about your traps though since you mention that the injectors top out at 418hp. If you were indeed putting down 418whp or even in that ballpark, you would have been trapping much higher than 108... what gives?

 

Could the Redline Shock Proof Heavy gear oil be sucking allot of power?
I was running lower air pressure than normal in the slicks, that will suck mph.
Compared to my old SC set up, with out running nitrous, the ET for boost only is close, MPH was ~112 for the SC set up. The 2.5" flex section is choking the exhaust. Bewen all this I'd say 4mph sounds about right.

 

Where can I get a good deal on a 3" flex section?

 

Got mine off ebay for $40

 

I try e-bay I have seen Stainless ones sell for like $120.

 

Burns Stainless and ATPturbo have them, but pricey.

Just make sure it's got the accordian looking inner lining.

 

Mardigras, do you have any emanage logs I can look at to see your spool?
Are you having to respool after each shift?

 

This is sort-of OT - but you said: "Using the M&H slicks at 11.5psi dumping at 6k"
You mean you reved to 6k from a stop and dumped the clutch on takeoff!?

If so - This tells me good things about the Clutchnet clutch!
My ACT blew when running to only 3500 and dumping it.

 

Stock engine? When you turn up the boost with the 720cc?

 

IANSW you only had ACT stage 1 though right?

 

I have not done data files, but I can say from what I have seen that it take about .50 to .75 seconds for it to re spool to full boost in the 2-3 shift.

 

SS braided for $55... http://www.kteller.com/store/index.php/cPath/23_85_87

not sure on the length needed for the Maxima though

 

Yes! 6k dump and hook!

The first run of the day is allways bad becase the clutch and tires are not warm yet. I get clutch slip in the burn out box, and no traction when I launch. The second run was AWESOME. I was pushed into my seat and my head felt very very heavy when she hooked and pulled a 1.7 60'. AWESOME!

 

Can we get SOMEONE local to Mardi to start recording these runs PLEEEEEEEASE.

I'd love to have seen the crowd reaction when you ran that 11.9 and soon to be low 11s.

 

if i remember correctly his 11.91 is on video... or perhaps im thinking of another one of his runs. i know i've seen him run on video before.

 

I think the one of me was a low 12 run against an F body. Corey had his camera but I dont know if he got any good runs or not?

 

Nice times ... not good enough huh? Much better than mine.. I was running 13s at 108 but on streets and no Quaife ... but I visit the track once a year! I think you are right about the timing being off, but I guess JWT has to be conservative. too bad you can't advance it yourself 740cc injectors? Holy cow! Can't you increase fuel pressure for now? Are you running Cartech or other FMU? Yes, get that flex replaced! We changed the design on the pipe to a 3" section a while back you must have an older kit.

 

One more thing I thought of is: are you running any kind of ignition booster? May be that would help too.

 

If I lean her out a bit I think the ignition will be fine, the J&S helps a bit with this. Just street gas for now.

 

Is there such a thing as an ignition booster for coil-on-plug cars?

 

I'm sure there is.... but what about one of those units that boosts voltage under 70%+ throttle. This would help fuel pump and ignition. They are only like 70$ as well

A MSD DIS setup would work with some fabricating...

LS1 coils are good to high power (guys in 9s are on stock coils and truck coils) ... fabbing these to the VQ wouldnt be too hard - and they can be had for under 200$

There would definately be horsepower to be gained if I could go back to say a .035gap from my 21 now!