Hi guys

I dynoed today at 11.5 psi and got 371 HP and 369 lb-ft to the wheels. I seem to be hitting a brick wall on boost. I can't seem to get over 11.5 psi for some reason. I am suspecting the exhaust is getting backed up again! 4" exhaust time?. My boost controller also seems to be out of whack I had to set it at 13 psi to get 11.5 psi of boost pressure.

Something's weird cos I dynoed at 352 HP @ 9 psi before, now, I only get 330 @ 9 psi. I lost 20 HP somewhere. The only thing I changed were the wheels. I used 17" 2002 wheels instead of my stock 16s.

I am definitely at injector limit!

I'll post the dyno graph pic soon! *** EDIT, dyno is on page 2 ***) Still no sign of detonation got 760 degrees C max on EGT.

Do you have a 3" exhaust now? And which injectors?
-Cyrus

how about some silvia injectors

I can't believe the fasted 4th gen if not max is from Colorado, maybe I'll see you sometime. I hardly see modded cars here, no less Maximas. Those are some good numbers man, what do you run in the quarter?

He's not the fastest if he hasn't been to the track.



Turbo hurry up and run that thing.

OMG that is alot of HP......... I am going SC in a couple weeks.

Dixit

holy moly, I dont even have a third of that power Some z31 manifolds could change all that, hehe.

Unless you can name someone with more HP in a 5 speed he's got the fastest max, 4th gens are light.

Where can I get those? Are those the 440 or 480CC ?

jsut cause u got the hp doesnt make u fast...alot more then that..as of now don still hold the record 12.2 auto.

lots of hp doesn't mean much if you can't get it to the ground. Are you going to run on street tires or drag radials?

Those #'s are very impressive, congrats! Please keep us 5th gen owners updated about a kit for us

Wow really? I thought Don's time was more like 13.1, not 12.2 he has the fastest auto around because of his highly modded tranny. Nigel's will easily do 13.1 with a 5 speed and those HP and Torque numbers, I never said he was the fastest Max. We'll see, I bet he runs low to mid 12's if not better.

Here is you saying he is the fastest 4th gen.

Here is you in the same post asking what he runs in the quater.

expain...

4in. piping

Sorry I haven't formatted it yet. here it is for now No boost is CAI and Y-pipe only:

holy fawk

nahhh go for the fully blown 5" piping

MaMa

That's sexy.

All I can say is DAMN!

your max Is sick what do you do, or should do

My bad! It was 372.1 HP not 371!

lol I mean what do you do on the 1/4

[QUOTE]Originally posted by turbo97SE
[B]Hi guys

I dynoed today at 11.5 psi and got 371 HP and 369 lb-ft to the wheels. I seem to be hitting a brick wall on boost. I can't seem to get over 11.5 psi for some reason. I am suspecting the exhaust is getting backed up again! 4" exhaust time?. My boost controller also seems to be out of whack I had to set it at 13 psi to get 11.5 psi of boost pressure.

Something's weird cos I dynoed at 352 HP @ 9 psi before, now, I only get 330 @ 9 psi. I lost 20 HP somewhere. The only thing I changed were the wheels. I used 17" 2002 wheels instead of my stock 16s.

I am definitely at injector limit!

For the record, are you running stock internals??

yeah, are you still running stock internals, or do you have VQ/VG30DET internals? (can't remember the engine code sorry )

I am pretty sure Nigel is on stock internals. And his only other mod is a Y-pipe (again I think).
-Cyrus

Man those are sick numbers!

Shouldn't your custom exhaust manifolds fit a 5th gen?

BTW, you might want to check your flex section on the Y-pipe, Cattman or Stillen?

I'd call RC Engineering for the injectors.

[QUOTE]Originally posted by i30krab
[B]for the record, read my sig

If the internals are indeed stock, all I can say is BOOM sooner or later!!

I know that everyone has opinions, but I think that that turbo is a tad too big. The peak numbers look good, but the chart looks like a supra dyno, it is small until 4000 rpm and then it hits hard. I think a smaller turbo would give you more area under the curve, and a better all around power curve, with probably the same peak. I do not claim to be an expert on turbos, and I am not bashing either, just stating my opinion. I am just happy that someone has finally gone through with it.

But no BOOM yet?
-Cyrus

Like I said, sooner or later! hopefully later.

Nigel, you're killing us man! Go to the track already!!!!!!!!!!

-Josh

He will trap really high but the ET won't be as low as most people think.

then rebuild time & make it even faster

I don't know, he's been running for a while and his only problems I think have been a slipping clutch and not enough traction. Don't you think would have seen something by now, espeically since his car is a daily driver?

My thoughts exactly. FWD

-Cyrus

How bout some actual help? What boost controller are you running? Have you checked your wastegate adjuster arm(if internal) or your spring and lock nut(if external)? As for your exhaust being too small, dream on. A single 3" pipe will flow well over 600 WHP so you've still got a long way to go. Anyways, I'm betting its either your boost controller(I'm guessing A'pexi AVC-R).

I will be going to the track in 3 weeks! I am on business trip starting this saturday.

You are not the first to comment on the size of turbo. I have decided to make an adapter to bolt on a T3/T4 and show you the numbers ... again, when I get back. I agree with you, if you have read some of my other threads that boost is late and falls off because of our intake manifold. Once that is fixed, I believe you can't beat the T4 for the strip.

So many people ask for dyno results and 1/4 mile results. It's the larger turbos that get good results, not the smaller ones. I know of civics running T4 turbos. Lag actually helps FWD cars to hook up. I've been asked a million times to take it to the strip. I am not a good driver (for strip) the results are likely to suck. Also remember, we are at 5500 ft above sea-level, so results will not be so good.

Would you like me to drive iot for you?