Finally got around to dynoing my car. I made 3 pulls all on 93 pump gas. For the first two pulls I set my boost controller to what I set it at at the drag strip, I usually see about .95-.98 bar at the drag strip with the cutout open, and about .85-.87 with the cutout closed, at the same setting on the boost controller. the last run I did with the cutout closed and the boost controller turned off, so just wastegate boost.

First pull was with the cutout open. I peaked at .93bar (13.5psi) for this run and made 367whp and 365wtq uncorrected. USIM is not the sweetest ever, peak torque was at about 5100rpm (basically a plateau from about 5000-5350 where it only varied a few ft-lb) and peak HP was at 5400rpm (plateau from 5200-5400) and then it falls off to about 310whp by 6400rpm where I let off. the pull felt smooth and normal (other than the fact that it spools way later on the dyno than it does on the street because of the decreased load). STD corrected numbers were 381whp and 379tq for those who care. Personally I don't believe in corrected numbers just like I don't believe in corrected 1/4 mile times. Temp according to the graph was 85 deg and baro was 29.50 which seems a little hot and a little low on the baro really.

Next pull I didn't touch the boost controller, just left it where it was, and just bolted the cutout cover back on. I saw less boost naturally, about 1psi less (12.5psi peak), and I made about 40whp less. I have a straight through muffler and very little bending, so it's a very free flowing exhaust. So the cutout does definately help me, even above and beyond the simple fact that I make more boost with it open. Peaks were 327whp @ 5400 and 325wtq @ 5100rpm, with a torque plateau right around the 320-325 range from 4600-5400. STD were 340/338. I lost about 65hp from peak @ 5400 to 6400 where I let off. Pull felt smooth.

Last pull I turned the boost controller off, cutout still closed. This run I could tell it was missing a little bit up top, and it's evident on the dyno graph. I peaked at 274whp and 278wtq on 9.7psi, both at about 5250rpm. By 6200rpm I had actually dropped down to about 175ish whp lol. Something, in addition to the USIM just sucking, was definately going on above 5800rpm, I could hear it a little bit, so I let off early because there was no point in staying in it.

So those are my baseline numbers that I wanted to get before I go and start changing some things. These boost controller settings are what I use at the track. I trapped anywhere from 117-120 on the higher boost setting with the cutout open, and 112-115 with the boost controller off and the cutout closed.

there was a 3.5 5spd altima there with I/E (can't remember if he had Ypipe or not) that put down 230+, and a 350z with intake that put down 240whp, so the dyno appears to read right in the middle of the road to me.

I've got the runfiles if anyone wants them, though on the version of the dynojet run viewer software I just downloaded I can't see anything but HP... no TQ, no RPM, etc. Not sure what's up with that.

Here are the graphs.

 

Didnt this car have a VI back in the day? Why was it swapped out, I remember something about NOS/fuel puddling. I cant belive the loss up top with the USIM. Do you have a full mods list around?

 

Wow neal, I smell VI FTMFW! Aside from that, yea you could see it on the graph that something happens right at 5800 on the 3rd run. Do you have the a/f data to further pinpoint the source of the problem? Good Luck

 

Yeah it had MEVI but it actually physically exploded back when hal had it because of fuel puddling like you remember. The top blew off of it and took out the hood as well.

Full engine mods are basically T61 P-trim w/ .82 hot A/R, 3" all the way back from the turbine, exhaust cutout, emanage blue, 6 x 370s and two 750s before the throttle body (I believe this is what is making the graph quite jagged, combined with the fact that it's street tuned mostly without datalogging and probably overly conservative), 24x12x3" IC w/ 2.5" piping, z32 maf, plx R500 wideband. I think that's it. Then there's all the suspension/wheels and stuff.

The top end issues are hopefully going to be resolved soon, and the fuel setup will be completely revamped. That's why I wanted to get on the dyno now so that I can have a good set of before and after numbers. For now I'll just keep shifting at 6000rpm heh, or maybe before (gotta plug these numbers in cartest).

 

There will be an intake of some sort in the future, that you can be sure of

I don't have any data from the actual dyno runs I made for two reasons: about a month ago my car was broken into and my wideband was stolen. i've got a new one that I just haven't bothered to install yet. So nothing datalogged on that front. I also had a dead laptop battery so I didn't have the laptop hooked up to the emanage to datalog anything on there. But I do have the ability to datalog a plethora of parameters, which I'll do at some point here (actually was considering doing that today but it's raining out). I'm honestly not terribly concerned with it, beyond mere curiousity as to what is going on, because the entire tune, fuel, and intake systems on the car are going to be completely new in the next few weeks/months.

 

Haha nice #'s Neal but yeah, obviously a lot more potential. What are your plans for the VI? It sounds like you have something in mind other than MEVI/00VI...

And I'm sure you're doing this but I'd get rid of the 2 injectors before the TB and just get 6 properly sized injectors. The less distance you have to have a fuel/air mixture flowing together in the ports the better.

 

By the way, it's sortof hard to tell from those graphs what's going on, I wish I'd had them graphed separately.

The first run is dark blue HP light blue TQ, the second run is dark red HP and dark blue TQ, and the third run for some stupid reason is dark red HP and light red TQ, which makes for a very hard to read graph.

BTW I do have all three runs on video (digital camera video not camcorder video, but still they are pretty decent and you can definately hear the sound difference between open and closed cutout if anyone's interested). I'll get those hosted soon.

 

Yes and yes. The two additional injectors will be trashed and 6 larger deatschwerks injectors are going to replace the 370s that are currently in there.

 

I can't believe you actually trapped 120 mph with that giant USIM drop off.

I say 00 VI + E-manage Ultimate. One grand and your trap speeds will get consistantly ridiculous. What does the car weigh? 3000 with you in it?

I put 3050 and 120 mph in a 1/4 mile rice math calculator and it said 411 HP at the crank. Pretty damn close to what 365whp should give.

 

The car is 3100 with me in it, all my runs are full interior these days. I don't bother taking anything out with this much power available (the trunk is bare all the time however).

I knew there was a dropoff beforehand because I could definately feel it up top. I shifted typically at close to redline in 1st, then about 6200 and then 5800-6000 at the track. I'm going to cartest it this afternoon and see what RPMs it tells me to shift at, just to see how close my estimation was.

 

I cant belive the car never had real injectors. It always amazed me that Hal had such a crappy fuel setup, yet did so much on the custom turbo setup. Isnt this turbo pretty big? Forgive me Im used to T25's, T28's, and T3/T4 turbos. Even the Sentra guys run something like a 72 lb or 740cc injector.

 

yeah it's on the larger end of the spectrum for maximas. it can flow about 62lbs of air which is a little more than 600hp.

 

nice numbers!!!!!!!!!!

Even with the MEVI, you would have nailed 400+ hp with about 350 wtq.

Glad your finally winning the battle

 

Nice numbers Neal.

I'd expect some great gains with your new injectors, trick manifold, and some dyno tuning. I think 415 whp is more like it.

 

Wow...wow...wow.

Can't wait to see 400+whp from this beast.

Good job Neal...interested in what your IM plans are.

 

I'll post up after it's completed. I'd like to get it done before I make any claims and what not.

 

Great numbers Neal! By the way are you still running all that boost on a stock block VQ30?

 

I was going to ask also but figured you'd say something like that...

 

Neal doesn't like to make claims, but from what he has told me it should make a significant difference. Heck I bet that with a 00 VI he would see some huge gains past 5K. IMO he should easy make 400whp when all is said and done.

 

Yes it's still a stock motor that i just grabbed out of a junkyard for $300. picked it up and slapped it in all in one day, nothing done to it.

 

I hope you and others understand that I'm not trying to be "secretive" or "hide my mods" or anything like that. I'm sure you've noticed that I always divulge my full mods and info (maybe I give too much info, maybe that's why my $550 wideband was stolen a month and a half ago) after I do something, but I never talk about things beforehand. I have some plans right now but if they don't pan out I don't want to be known as a guy who makes claims that aren't followed through upon.

 

Neal,

What boost controller are you running?

 

I have an old Apex'i AVC-D



http://www.spipowerexcel.com/apex_avcd.htm

 

Nice numbers Neal. I made my peak whp at 6300rpms with my VI, cant wait to see what you put down with a better flowing manifold. Is timing pulled back at all?

 

No worries. I wasn't insinuating that, I just figured you'd be going a different manifold route than MEVI/00VI and wouldn't want to post all the details until you can see results. I'd do the same thing.

And I will say that if I had a FI car I wouldn't be using either of those 2 manifolds either. The 00VI's not bad, but for a boosted car with a fairly large turbo, it wouldn't be my first choice either.

Sorry to hear about the theft too. I did not know about that.

 

yes alot, perhaps too conservatively. I haven't dyno tuned it so I just went with a set of values I was sure was safe. I pull it based on boost starting at 8 psi, I pull 1 degree per psi until 5000rpm and then i add it back 1 degree per 1000 rpm til redline. so at 10psi I'm pulling 3 degrees, at 14 im pulling 7 degrees, etc. I'll actually dyno tune it to get it as optimal as possible once I get the new intake manifold and injector setup up and running.

 

Nice numbers. What rpm did you see full boost?

 

I don't know. I wasn't watching the boost controller. On the street I usually see my maximum boost in 4th gear at around 3900-4000 but it was later on the dyno you can tell by looking at my graph, probably in the high 4000s or maybe low 5s.

 

Aint that the truth. I try to be like that too but sometimes it's hard not to tell anyone what's planned to go under the hood...

 

Sorry I wasn't specific enough Neal. I have 97 SE 5 speed with a MEVI,
555cc Nismo Injectors, TTzMaF, TTzFuelPump, JWT Ecu, a 58 trim T04E turbonetics ball bearing turbo, with a .68 a/r P-Trim and I dynoed at 300hp and 300torque @ 13psi. Everything else on the motor is stock. I have an FJO wideband and many other parts that help with the support and monitoring of the set up.
But I was just curious, because I am planning on getting a bigger turbo and wanted to know the limits of a "stock" VQ30, without doing the heads, pistons, rods, cams, etc.
I apologize if my first question came across as pure ignorance. But any info or response would be appreciated. Sorry to hear about the break in.
Thank you.

 

Neal, somewhat off topic, but what trans are you running?

 

I've got a mildly built 97-99 open diff trans in it right now.

gbturbo - no one really knows what the limit is. people have put upwards of 600whp through stock VQs with good tunes and others have blown headgaskets and cracked ring lands with 350. your engine is only as safe as your tune is.

 

Thanks for the response Neal. I totally agree with you, that's why am I taking so long to research exactly which new turbo to go with. Been lookin at the gt4067r and a few others. But thanks again and good luck with the new intake and future plans with the car.