213 hp 238 ft-lbs 7.5 psi

[doctorj240]

Just got back from my first tuning session. 7.5psi only. The mafs maxed out at about 4600 rpm and we didn't think we should push it too much more than that. From the base map I used I gained about 20+ hp just from the tuning, mostly retarding the timing quite a bit. So now it's time for z32 mafs, 50lb injectors, and an ignition amplifier. I'll have the chart up as soon as I can.

[bruinbear714]

Just got back from my first tuning session. 7.5psi only. The mafs maxed out at about 4600 rpm and we didn't think we should push it too much more than that. From the base map I used I gained about 20+ hp just from the tuning, mostly retarding the timing quite a bit. So now it's time for z32 mafs, 50lb injectors, and an ignition amplifier. I'll have the chart up as soon as I can.

Very nice figures for a kit that comes with almost everything.

[MikeMurphy]

What is your timing at?

[NX95240]

great numbers!! have any pic of your setup?

[doctorj240]

What is your timing at?

Generally, under boost, the timing is retarded up to 12% from base timing. This gave the most power and torque. Only a little bit of fuel was added in a small range of the powerband.

[aleph1]

Seeing as Greddy advertises that the kit without IC will hit 210hp...i dont think its that great. Its decent, no offense or anything, Im sure its fast. But I would think more like 230 or something with that setup...

[andrave]

yeah me too...its nice and all, and its a nice increase over stock.. but thats a lot of money for that power level.

[doctorj240]

I'm still trying to figure out some problems with my car right now. I thought it would be closer to 230 with the setup I'm running but I won't complain too much. The a/f ratio across the board was b/t 11.5 and 12 so it was somewhat conservative. I know I can probably get more hp out of it, but this is my daily so I don't need any problems.

[aleph1]

Nah those are decent AFR for daily driving, thats what Im shooting for. There must be some other reason why its on the low end.

[andrave]

are you using that poopy thing that blocks the mafs?

[GEO]

yeh the restrictor...

[racin-type]

anyone here know how that 20g turbo from the greddy kit compares to the more familiar t3 combinations?

Where in the rpm range does the boost start building?

[WDRacing]

Wow, I wonder what other guys running the Greddy setup are putting out for HP. I didn't realize you have the FMIC already. Now those numbers don't appear so good afterall. For a $900 upgrade, it doesn't seem to have helped....at all.

With AF ratio's being in the 11.5-12 range your doing well for a daily.

Gaining HP from retarding the timing is a tad odd, unless there was just way to much advance to begin with. The goal however for power is usually to keep as much timing advance and boost without detonation. How much did the EGT's go up when you retarded the timing? Or do you know?

WD

[doctorj240]

Egts stayed roughly the same. Over every run we retarded the timing we gained both hp and tq. So the base map that I used, which wasn't the Greddy by the way, we got 20hp just from retarding timing that much. Like I said though, I'm still trying to figure out some problems. One other thing. I still have the stock cat on with a 2.5" exhaust. I also have all the emissions crap on. So there are still some restrictions that I'll be getting rid of in the near future.

[chandler]

man, you put a full 3 inch exhaust from turbo back you should see some decent gains then

[WDRacing]

Actually, I've seen many 2.5" exhausts on cars with over 300WHP. Until you start getting into the big boost a 2.5 will do just fine. You might want to consider a test pipe for dyno sessions though. Or atleast hog out your cat.

I have a test pipe you can borrow. Course the whole shipping thing will probably be as much as simply fabbing one up.

WD

[doctorj240]

I have a 3" midpipe, not installed yet, that replaces the stock cat but I need either a high flow cat or a test pipe to replace the dummy cat. I'll just buy one from projectnissan or enjuku or you if you have extras laying around.

[WDRacing]

Well, I'll be using the one I have some time. But I guess I could start fabbing some up. I'll shoot ya an email if I fab a couple. Sould be pretty cheap, just some 3'' pipe and 2 flanges.

WD

[C-Kwik]

doctorj: the datalogs you sent me still aren't showing up correctly on my PC. I'm not sure what is wrong there. I wanted to compare your results with mine since you have to make so many adjustments to my map to make it work on yours. It seems very odd that you had to back off timing so much from my settings. Mine doesn't detonate. Though, when I had a boost leak, it was more prone to detonation and the power was way down. Maybe double check all your connections to be sure. Make sure you use a socket to tighten down hose clamps and not just a screwdriver. Until I can compare the datalogs to mine, it's hard for me to say what is going on.

[ftrs13]

did you stop the dyno at 4600 rpm, because there should be a little more HP above that point, even though max torque has probably been reached.

[doctorj240]

did you stop the dyno at 4600 rpm, because there should be a little more HP above that point, even though max torque has probably been reached.

Nope, the hp peaked at 4900 rpm and tq peaked at 3900 rpm.

[aleph1]

now thats weird....

[ftrs13]

on a 20G???

before I looked at your sig, I thought that sounded more like a T25, or another small turbo.

youre making me doubt my z31 T3, I should get it to the dyno sometime soon.

your timing is really far back, it should only be *retarded* 3 degrees or so for 7psi boost. have you checked for leaks?? you could be suffering from boost leak

[doctorj240]

I've been constantly searching for leaks. I was hoping for closer to 230 hp with the 20g at 7.5 psi.

[TachyonS14]

ya, your power should not peak so low.

[Red733]

It's good to see you're making progress with the Greddy kit doctorj240. It gives me some hope when I'm tuning mine. =)

Btw, are you stilling having problems with the car dying after full throttle? How's it idle?

[TachyonS14]

Is the GReddy kit supposed to be 200 hp, or 200 whp?

[doctorj240]

I have good news and bad news. The bad news is that I checked compression today and got 145-70-155-150. I just noticed that I was getting a lot of blowby after the tuning session. So I checked the compression and got those crappy results. The good news is that the dyno results were most likely on 3 cylinders. That's probably why the numbers were so low, and everything was messed up.

So... where should I go for a good headgasket?

[racin-type]

holy **** those numbers are crazy. i feel for u man. u should find out what else is wrong before you immediately assume its only the head gasket. i would go with a stock headgasket.

good luck

[Nathan]

Or a fel-pro, imo their design is better than stock.