Me, MadMax024 (didnt dyno), and a friend w/ a turbo 240sx went to the dyno yesterday.



I was using my friends manual boost controller, and he didnt want me messing with it cause he already dyno'd, and it was set for him. He was running 11psi, but when I dyno'd, it only went to 9psi. It didnt spike at all. EGT's were suprising low, at 1300*F or just under, but considering I have TTZ pistons, I guess its not. My timing was set to 12* BTDC, just 3* retarded. The 9psi I am running is what they run stock, so it makes plenty of sense. That makes me happy and confident to run more boost, close to what TTZ guys can run on the streets. I am also running one step colder plugs from a TTZ, so that helps too.

Got my fuel nice and flat w/the aid of my S-AFC II. Of course this graph shows my low end problem that has plagued me for over a year now, which is even more prominent seeing as how I am boosted now. You can see what I am talking about if you look at both the hp and tq curves. Both of their slopes change dramatically right at 3500.

As for my thoughts on the dyno, I would say I am pretty happy. I was hoping to mess with the boost controller a lot more, and run at least 12psi, but I guess thats for another day. I was hoping to hit 300whp at 10 psi, which will be very close. In my opinion, 284 is vey good considering I run such a small exhaust turbine housing (.63 T3) and the fact that I have lowered compression.

By the way, my friend with the 240sx runs a straight T3 turbo, and on 11psi, made 212hp/242tq. Thats some torque!

 

second post

sweet! I keep forgetting you have lower compression lol.
You might be the first low compression boosted max on this site lol, or atleast the lowest.


up the timing

 

That is damned good w/ the lower compression. Powerband does look pretty bad off of the turbo though. The smaller turbine means you spend less time down there at least.

If you're willing to risk slightly leaner a/f you can probably break 300whp. Of course it's better just to run it safer.

BTW, you should have no problem destroying 240's at the track w/ that kind of power band. Car should be capable of solid 13's w/ that.

 

so thats 283 hp out of a 3rd gen??!!......

 

283.5 out of a VE

I cant wait until the whole knock sensor thing is fixed

 

very nice numbers

did oyu get a different turbo or is this the same turbo that you had the last time you dynod

 

nice work

-vq

 

Impressive Julio, now i'm curious on what that thing can run in the 1/4

mtcookson...we're waiting for your dyno

 

i'm guessing really low 13's

 

I dont want to kill the good news on this, but those numbers dont look good to me.

Before I dig into reasons, what is your setup on the turbo? Size, piping, intercooler? Break it down for us.

Dixit

 

Niiiice!!!

It sounds impressive so far and you definitely have room for fine tuning more hps out of it. It will be sweet to see a 3rd gen down in the 13s.

You hard work is done, now send me my stuff

 

It's pretty good considering it's your first dyno. You still have timing to tune. Good job!

 

yeah, i need to get over to the dyno sometime soon. been so busy with work and now working on the Z i've not driven the maxima much at all. not really much driving i can do around here though.

 

why dont you up the boost to 12-13 PSI or something? you have lower compressoin Pistons and rods right? you also retarded timing. What can possibly go wrong?

 

As he said, his friend "didn't want him touching the borrowed boost controller" so it was at 11psi.

If it was only hitting 9psi, you've either got some leaks somewhere, or you've got too small of a turbo. I would guess more on the leaking side of things, as you've got some horrible problems down low and your A/F goes crazy.. the engine isn't reading the proper amount of air going through the engine. turn off the boost and turn off the s-afc and do some dyno time. see what you're getting with that stuff off.
I would be looking at your power valve actuator and VTCs as well, as that's where the power below 3500 come into play. If you have one of those stuck the wrong way you'll lose 50lb-ft of torque easy.

As for the 283hp, that's pretty good at 9psi.. you're above what you would theoretically be making at 9psi if you were stock..
(a stock engine puts down about 170hp. if you cram twice as much air into the engine-14psi boost- you'll theoretically be looking at 340hp.. those are of course ballpark numbers, but you'll be looking at about 350hp if you run the boost to 14psi.)

But I would go back and check out your piping if you're only getting 9psi with the controller set at 11. you'll be leaking a lot of air somewhere.

 

Thanks for all the support guys. Like I said, i was pleased with the results. I wont be able to get to the track for a while though unfortunately unless MadMax024 gets his car back on the road too. Even then, my 60ft times are gonna blow monkey nuts cause of my low end problem. I dont even want to go until that is fixed. I didnt want to go to the dyno until it was fixed either, but my friends convinced me to go.

Dixit, my setup is a t04e (60trim) with a .63 T3 exhaust housing. All piping and intercooler (frontmount 24*6*3) inlets are 2.5". If you are gonna talk about my low end, dont even bother, thats a whole other discussion. But my exhaust turbine housing is probably choking the motor quite a bit, and coupled with my lowered compression, I dont see a problem.

 

Thanks for clearing up why i couldnt up the boost any.

"If it was only hitting 9psi, you've either got some leaks somewhere, or you've got too small of a turbo. "

Well, my 240 friend has his hooked up to the compressor housing, and mine is off the manifold, so the pressure drop from the intercooler explains the different boost. Not to mention the accuracies of the 2 boost gauges (both autometer). Gauges are known to be a little off from one to another. I mean, they both arent 200 dollar gauges, so I dont expect them to be perfect.

"I would be looking at your power valve actuator and VTCs as well, as that's where the power below 3500 come into play. If you have one of those stuck the wrong way you'll lose 50lb-ft of torque easy."

VTC's are freshly rebuilt, and I believe are fuctioning fine, because I can definitely feel a lot more low end than before the rebuild. The power valve on the other hand is open anytime I floor it. But on the dyno, there was a very low loss in low end with it was open opposed to when it was closed (5hp/tq). High end got a pretty good gain though (10-15hp @ 5psi).

I am gonna try and source a new engine harness for my car under the suggestions of Jeff, erty, and arron. It has been til now where I cannot deal with the loss being there anymore, so I guess I can try a new harness. Anyone got one for me???

 

I have an auto harness, but you'd have to run sperate wires to the VI

 

julio, good play on the engine harness, i highly doubt its going to be a hard job, maybe just disconnecting the SMJ at the firewall..whatever, a days work at most.
also i dont remember if i mentioned this to you, but john gained what, almost 12hp from that 1.5* timing advance? you didnt touch your timing at all
i think when my car is back, we'll dyno again (erty wanted to go with me) and you should just leave it at 9psi and tweak the timing..if its anything like john's 240, you'll be over 300hp on 9psi
wouldnt that be somethin' muhhahahahahahahha

 

These are very good numbers for a low compression VE. I know most people are going to judge your dyno to a 9psi VQ, but you cant. VQs have the same stock compression as VEs (10:1). As we all know, 10:1 + 9psi is going to be higher than 8:1 + 9psi, BUT you are still right in the 10:1/9psiVQ range with 9psi on your lower compression motor. I would seriously not hesitate running 15psi. I know a few friends that have owned TTZs and they usually ran 15, cause they said that is when you need to upgrade the turbo, so they never went more.

Good job

 

very very nice dyno results! show em what 3rd gens can put down.

 

If anyone wants a really big pic of it, email me theadministrator@gmail.com and I'll send it to you

 

Ahh me likes Julio. I thought I had the thread bookmarked with your engine specs but I guess I dont. =\ (I'm actually not sure it was you or not but I *think* it was - however if you never made such a thread then I guess I'm wrong) If you dont mind me asking, what are you running internally aside from the TTZ pistons (if anything)?

 

James, I believe that is it, I think he may have used the rods, but did say they are the exact same things as the TTZs.

 

He used VE Rods

 

Yup, stock rods. As wierd as it may seem, the VE rods are the same as the vg30de/tt rods. I have the Z rods right in front of me, and they look exactly the same. Both have oil squirters in the rods.

No other engine mods though. When I rebuilt @ 176k miles, all bearing were still in spec, as was the oil pump. All I really did was deglaze the cylinder walls.

 

Like I had said, I have the colder plugs, so detonation wont be a problem as long I keep a watchful eye on the ol' EGT gauge, keep 93 octane in it, and stay away from anything above 1450*F. The Z MAF wont max out, and my 370's w/higher fuel pressure is more than enough fuel for that kind of boost. I cant wait to do some high way runs on 12 or more psi. Once MadMax024 gets his stuff together, I will redyno with a lot more boost, depending on how the MBC spikes.

 

same thing

 

wow!!

 

its coming its coming intake manifold is done, and goes back on tomorrow..now to just find those pesky screws for the vac canister bracket
erty wants to dyno when i go..i'm sure john will be up for it, at least to go and watch.
i'm so nervous about going though, i dont know why..i guess i'd rather not find out i'm not putting down as much power as i want, and my a/f is all f'ed up.
the 240sxONE dyno day is july 31st, i'd like to go before then but if not i'll go with those guys(if they dont mind).
ryan is going to talk to TTZ guy and see if you can borrow his MAF, i dont think it'll be a problem

 

fine then ask ryan...punk. no love for matt

-M@

 

Julio, the harness is off the car in a box heheh .

One thing though, maybe try unplugging the VTC's, seriously, both front and back. I betcha you might get more lowend and maybe more boost.

 

nice run..keep the max poppin