In case you are thinking about the greddy turbo kit

[Florida240sx]

Are your sure it's only 8lbs your running?

[Florida240sx]

that kit was used on a completely stock motor, exhaust, no intercooler, etc.

its nowhere close to the setup I am running.

All you got is exhaust....at 8psi I don't see a 50hp gain.... B tuning ti you could gain probably 20-30 in each areaWhat is your air/fuel ratio?Just went into the stick for kat horsepower poll and found a guy that has the greddy kit with AEM 278rwhp/282tq @9 psi on pump gas

[klattr1]

looking at your dyno graph, i notice two things:

1) definitely major boost creeping going on (which seems to be the case in your first post)

2) clutch slipping at 5000 rpms which spiked your peak TQ numbers more than it really is

so based on your signature "298whp 292tq ... at 8psi... believe it", i dont really believe it.

other than that, you were very informative.

[chandler]

Im gonna go with ryan on this one

C.

[GEO]

Better fix those things, before they become a problem.

[farlsmagee6]

its 12:1 all the way across... and yes it is running a solid 8 psi.. and tuning it does gain you some big numbers. greddy pre-tunes the emanage, but it runs so friggin rich its ridiculous. it makes a big difference once you start opening up the air flow and leaning the system out.

[crzycav86]

i agree with the clutch slipping theory.

you're making about 265tq, not 292.

[Zion8561]

i agree with the clutch slipping theory.

you're making about 265tq, not 292.

Im no dyno expert, but just out of curiosity...Since they are measuring WHP wouldn't a slipping clutch actually show up as a dip in the dyno chart?

It just seems that since the clutch is slipping then less power would be making it to the wheels instead of the other way around.

[S-14boy]

Just curious what your maps look like. I have had my kit for a while and when I originally had it dynoed at 7.5lbs I only put down 212.7hp, with a Spec Stage 3 Clutch, Fidanza FlyWheel, Greddy IC, Greddy BOV, and Profec B II. The best I have ever seen was 216hp with my Escort G-Timer2.

Heres my original dynohttp://i60.photobucket.com/alb...O.jpg

[Edub1]

8 PSI is 1.54 atmospheres. If you multiply that times the stock HP of 155 you get 239HP. So, it would seem that your turbo has greater than 100% efficiency. But I admit that isn't 100% scientific.

Anyway, the only reason bigger turbos make more overall HP is because it is easy to over run the smaller ones to where they become become inefficient and just make heat pressure rather than substance pressure. Once a turbo can move sufficiant air to create quality, efficient boost at the high rpm levels it would be of no benefit to increase turbo size.

A T04E at around 290HP is running around 74 - 75% of a possible 78%efficiency. Which means that your motor would be getting 8PSI of cool, quality boost. You should be able to look at a compressor map for your turbo and see it's efficiancy but I can't see how the T04E would fail to give 100% of what 8lbs can give.

I think it is probably the case that you did something wrong and your emanage wasn't pulling any timing or the dyno needs calibration.

[Chezedik]

On the part of the map where HP is highest, TQ is lowest, and so a slipping clutch will show lower TQ but a slight increase in speed due to engine RPM increasing in what might be described as carry-over. Anyone else care to add?

[GEO]

I still think his timing was way to advanced.

[NateDogg]

I'm still looking forward to seeing your timing map...It can help a lot of us so please share.

[Edub1]

If there is a problem with the emanage hookup or if the sensor is tapped into a bad spot the maps won't matter.

[Chezedik]

There is no sensor, you cut the wire from the CAS, and then you have an in and an out. It just tells the computer that the Crank Angle is different than what it is, just about like any other way of controlling timing through a piggyback.

[Edub1]

There is no MAP sensor?

[Chezedik]

No, you can add one if you like though. With the blue it is only good for datalogging and over-running the stock MAF. Ultimate allows for a conversion. I will be using it, but mainly for purposes of logging, and maybe for pulling timing if the software will allow.

EDIT: I just checked, and the adjustment map can function on MAP voltage instead of TPS, so it can be used as a boost dependant timing retard on a 16x16 table, not too shabby.

[Edub1]

I assume that since the poster is only using the emanage that he is pulling timing with it. Perhaps he isn't pulling any at all which might explain the high numbers.

[Chezedik]

He is using blue, and said he took it to a tuner, I am still waiting to see his tune, then I could say what was happening.

Farls, did you ever talk to your tuner about gettting that tune?

[farlsmagee6]

hey guys - just lettin you know ive been out of town the last two weeks and havent had much time to get back on this post. i will call the guy today and see if I cant have him send me the maps.

and as far as I know, the emanage IS pulling lots of timing... its pretty much the only way to keep from creeping with this setup. It pulls so much timing that it can keep the turbo from making any more than 8psi even though it wants to

but hopefully I'll have something for you in the next few days

[S-14boy]

Any word on those maps yet?

[rlvq35de]

im suprised no one raised the flag yet

[grullan]

I have the greddy kit too, at 6.5psi 233whp/244tq. My map and dyno sheet is on KA-T.org under the dyno section. I would like to see this map though.

[Edub1]

I have the greddy kit too, at 6.5psi 233whp/244tq. My map and dyno sheet is on KA-T.org under the dyno section. I would like to see this map though.

This sounds more realistic.

[nissanfanatic]

Dude...if your emanage is pulling "so much timing", you would not make decent numbers.. My ECU tune is advanced past what most people would say is safe at anything lower than 15psi. I made 256whp/252wtq at 7psi.. I run a well designed tubular manifold with a decently efficient setup.. Even if you tuned with AEM EMS, I doubt you will make 40ft/lbs more with only 1psi more boost...

http://www.stealth316.com/images/td06h-20g-cfm.gif

Your 20g flows 5lb/min more than my T04E 50trim.. Its not that great...

Your dyno graph clearly shows boost spiking/creeping and/or ignition missing.. Get that stuff fixed, switch to an external gate, and then go dyno again..

[jmhalder]

your right, that is in no way scientific... but i always use the same calculation to make a guess... lol

[WDRacing]

The mani you're using is WAY better then the cast log Greddy is selling.

I don't want anyone listening to anything in this thread except for the posts where we're saying this can't be done.

Retarding the timing so much the turbo can't spool will lead to VERY bad things. Incomplete burns in the combustion chamber, very hot egt's...

I'm officially calling this thread worthless. For the noobs, just forget everything you read in this thread. You'll better for it.

Peace, I'm OUT

WD

[nissanfanatic]

I thought so. I just like to get someone's story so I have something to use in order to catch them lying..

[grullan]

I'll be dynoing my car again at 10-12PSI here in the next few weeks, I really think that I'll come close to the 300whp mark. I have a really smooth tune on mine, afr is flat all the way to redline at a nice 11.7:1. My base timing is retarted 3 degrees to 17. The stock tune really sucked from Greddy, I was sent one via email and I retuned my car with it.

I'm not saying the those numbers aren't possible, but I don't think I can hit those numbers at 8 or 9psi.....even with my tune. I would check for boost creep....my 2 cents.

[WDRacing]

I could probably make 300whp at 10 psi with the perfect tune and everything in the system put together perfect. But thats using 12.8 or so AFR's and the bare minimum timing retard. Spraying the IC with N2O or ice water and using a fairly large turbo.

That was the good thing about running E85. No timing retard at all up to about 10 psi. Granted, the AFR's are around 9:1 so you go through some serious fuel, but the power payoff is huge.