Well last Friday I was able to get to the track. I wasnt able to strip anything out or tune before I ran and it was a good idea to see a very baseline run (daily driven setup). I was on 8.0 psi, street tires, full interior, sound system and no tune, so the times werent impressive also the elevation that I am at (4400ft) I wasnt expecting much.
Corrected numbers looks a little bit better in terms of where I should be (trapwise).
I ran 4 times, very consistent but spinning thru the first 3 gears got the best time:

.145--R/T
2.489--60'
6.604--330
9.676--1/8
82.24--MPH
12.232--1000
14.418--1/4
104.31--MPH

Correction factors are: .9783(time) and 1.0206 (trap) so 14.1@106.

The time again was crappy but I am happy with the trap. I was only trapping 98ish when I was on a 125shot. 60' was horrible but thats what I get for running street tires. Overall, it was a eye opening experience. I dont think its a bad time for running in the 9.xx A/F and full interior and then some. I was thinking I would have been slower.

Today I was able to get her on the dyno. Being on the same setup, for some reason I wasnt able to get her boosting more than 7.5psi. She put down 349.2whp and 298.2 wtq @6150rpm on a Dynomite (which I never heard of before). Its a single roller same as the Mustang Dyno and supposedly the same output in terms of numbers. Again I am content with the numbers since I was only on 7.5psi, the A/F was a little better running in the low 10's.

 

real nice...the HKS turbo must be really doing a good job...i wonder what you would do at 13psi?

 

Andrew, its a Garrett. but yes the GTR35R is nice. I think I do have a boost leak because I can see it drop from 8psi to 6psi by redline.

 

i thought HKS ....GTR35R sounds like the GT35R by HKS

 

maybe a TO4z but no they are variatons of my turbo but they are mostly from Garrett.

 

I think you may be using n/a vehicle numbers. I believe that I did see a different chart for correcting f/i vehicles. It was about half a second more than they would at sea level.

 

Oops I didnt even think about that. Well then that puts me even slower
Edited the first post. Now I'm disappointed.

 

What was the correction factor on that dyno? Also what intake manifold do you have?

 

with that trap i can see you running low 13's easy, i ran a 13.5 @ 103mph once.

 

Last week I was running 13.2's at 101, 102 mph...

 

Its SAE corrected but he didnt tell me the actual factor. I have a full dek.

The thing is most of the SRT4s that ran that night was trapping like 102 with DRs but running 13.5s so I think with traction I can get there. I guess I really cant complain considering I wasnt even in my track setup so now I have something to look forward to.

BTW- my torque numbers seems kinda low. Is that normal?

 

That torque # is not your peak torque #, at least I'm assuming it isn't. That torque # is your torque at 6150rpm. Your peak torque number is higher I assume. HP = TQxRPM/5252. 298x6150/5252 = 349hp. Where is your dyno plot? I bet you make more torque lower in the RPM band, like down around 4000 or 5000 like every other turbo maxima out there. MikeD for instance only makes 320lb-ft of torque at that 6150, he makes 340+ from 4000-5500, and a peak of 356 at 4550, and that's with MEVI (less tq than DEK in the midrange, all else being equal.)

 

well i'll post the plot. I really am puzzle with that too because it shows that it is my peak hp but not my peak torque. I dont know how accurate that dyno is but here you go. I was looking for a mid range and it doesnt seem to be there at all like the other dynos that I've seen on here.



The first one is shorter than the second for some reason(different gear?). The second posted 347.4hp@6100/305tq@6000. I was told they were done in 4th gear so I dont know. Sorry for the quality of the pics. My camera sux.

 

Something is up with that dyno or with your car. you are making NA type power below 4500rpm. I've got to believe you are making good boost before then. Take a look at I30tMikeD's dyno plot for instance, he's making as much torque at 3000rpm-3500rpm as you are at 4500-5000.

I suppose it is possible that your piping is just so bad that you are lagging til 5000rpm but I find that very hard to believe. Mike's piping is far from optimal and he's making power way earlier than you are, and you've got that quick spooling GT35R on there and a DEK vs mikes less than optimal midrange giving MEVI. You've got a honda powerband going on there which certainly isn't normal for a turbo maxima.

 

its probably the dyno...another 6spd max was there and he pulled very low #s as well...

 

It's not the numbers themselves that are the most alarming, it's the shape of the curves.

 

Yea Mass Media also pulled low numbers:215whp 199whp? on 6spd w/ I/H/E and advance timing. He should be like the around 230whp at least. I think it really is the dyno more than my car. It pulls fine and build boost fine. I do believe I have a vacuum/boost leak tho.

 

what do you have for engine management? do you have the ability to datalog boost, rpm? Your numbers don't seem low, you are just missing about 2000rpm of midrange power. 350whp at 7.5psi is the highest hp at the lowest boost I've ever seen on a 3.0, though on the other hand your track numbers were not good so maybe that dyno is just wacked out and not giving accurate readings.

 

I dont have a map sensor for datalogging boost right now. I dont know what is up, my car feels fine but I think I will double check some things just so I can make sure it aint the car and its the dyno.

 

Those dyno #'s seem a bit high for the times you ran, but get those 60' down into the 2.1-2.2 range, and you should be able to pull a high 13.
You definately need some work on your launches, and some sticker tires. Try airing your current tires down to about 18-20psi

 

Y0 justin when i get back from cali we should go to cobb and see what we put down on a dynojet

 

Im not flaming or anything but hes at 4400 feet. This is going to play big role in how fast he can go compared to sea level. Its going to take quite a bit more effort, I was hoping for mid to low14s when i was running 5psi(track at 4900ft).

 

he ran a 14.4 up here. With the correction it was only a 14.1.

 

Altitude doesn't make as large of a difference on FI cars as NA cars because FI cars create their own false atmospheric pressure in the intake manifold. In NA cars the difference is more pronounced, but it's not a huge deal in a turbo car.

 

They have a 4 wheel mustang dyno. Maybe we can go to API. They also have a Mustang Dyno.

 

Went to the track last night, ran a 13.9@107 with a 2.3 60'. Was on street tires and had no traction til 3rd, the only thing that was different was I installed a open cutout.

 

Hmm 60ft suck

 

thats what you for racing on a crappy prepped track with the wrong type of tires (Potenza RE070, stiff sidewall autocross tire) even slicks/DR V8s were only running 2.0 60's but no excuses.
Theres plenty of room for improvement.

 

Kevlo u hater

 

WTH....

Exhaust leak or maybe the turbine A/R is huge?

 

what psi was that run at.

 

It was around 8psi-9psi, I havent checked for any boost leaks. Granted this isnt the normal 1/4 time for a boosted max but I dont have much seat time at the track with a boosted setup and I was on less than ideal tires for a drag track. The track condition isnt all that great either, this sounds like I'm making a bunch of excuse on why my track time is so poor but it really isnt my intention. The event I run at is called the midnight drags, the purpose of this event isnt like your normal track day, its really to keep the illegal street races at a minimum on the weekends so they only prep the track once before the start of the night and dont unless there was a spill of some sort. They don't really care much for the condition of the track so many of the cars dont post a good track time unless they have slicks or DRs.
I'm not the only one here that has poor times from this track, other org members (Mass Media & Glenmoormax) havent had much success in terms of getting anything better than 15+ sec passes. My friend with DR on a 75shot 5th gen can only manage a 2.0 60'... Evo's, STI's, SS, Mach I stangs all running high to mid 14's. That kinda tells you what I'm up against. You guys can say we all can't drive or what not but all I know is I'm not the only one having a hard time getting a decent run in. I don't know what to say to make it better but I can post slips of the cars that I ran against and all are running similar times and 60's.

 

Who knows, maybe the A/R is too big for the track. I mean it is a T4 .68 AR (hot side) but the spool seems fine and I have a decent trap I guess when you correct for elevation 109-110ish mph? thats good for around mid 300whp right? On the hwy it pulls like a monster but I dunno all these questions is making me feel uncertain about how the car is suppose to perform.

 

it's definately not the AR. lots of guys are running bigger AR than you are, on less efficient turbos and spooling way sooner. i30tmiked is a perfect example of this. less efficient turbo, larger A/R, reverse y pipe design, etc.

 

The only thing that large A/R can hurt is spool time, and if you say the spools OK, then a larger A/R turbo is only going to increase your topend power.

 

I honestly dont think the AR is an issue just like certain people are saying. I've done a lot of research before I bought the turbo so I knew what I was getting into.
The thing is, from a roll I would sit side by side Glenmoormax when he sprays his 125shot as I spool and would pull under full boost, same with a EVO MR (the same MR from the Vid I had in the weekend battles when my DE was broken). With this setup, I ran him on 5psi and pulled him a couple of cars where as in the vid i was on 10psi and couldnt do crap.

I'm planning on getting another dyno session when I had a chance, will be getting some DRs hopefully be able to get to the track this coming weekend.

 

I was just asking what your A/R was, I also don't think it is since it's on the small end.

You have an exhaust leak, WG not completely closed, turbo issue, or maybe just the dyno is screwed. Your torque curve isn't right, since you're making peak torque/power at redline. To me that means your exhaust gas volume/velocity isn't enough until you get to high RPM.

 

Here's Nigels' GT35R dyno:


vs. yours

 

was Nigels' Dyno done with the 00 vi? And what boost was he running. And what type of power would the dek and about 14-18 psi from the gt35r make if you had to guess

 

Not 100% sure...but pretty sure he ran a stock DE. Not sure if it was using a forward ypipe style kit.

http://forums.maxima.org/showthread.php?t=361469
"GT35R which has a T4 exhaust housing @12.3 psi."
"I get 1 to 2 psi of boost by 2000 rpm and 10 psi before 4000 rpm!"

Not sure on a guess, but 450-550whp should be possible.