So we were hoping for a whp number around 450 with this setup but never got to where we wanted. The setup is as follows:

B16 block darton sleeved 81.25 bore
JE 9.0:1 pistons
Crower Rods
Crower Valvetrain
Stock cams
Full race stage 2 60-1 kit
3 inch exhaust all the way
1000 cc injectors
Tuned on hondata
65MM throttle body
Edelbrock VictorX Intake Manifold
Dyno'd on a Dynapack 4000 dyno

25 lb dyno


Here is a picture of the setup

Here is the car the setup is in


Looking through dyno sheets, I have seen similair setups make 450-500 whp. Kind of dissapointing but it is fun as hell on the street.

 

Those numbers seem very low for a sleeved b16 on 25 psi....

 

81mm bore and stock cams... i wouldnt expect alot.

 

With a little over 280tq I would expect it to be in the 400's especially in a B16.

 

Who tuned it?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nsxmatt &raquo;</TD></TR><TR><TD CLASS="quote">Who tuned it? </TD></TR></TABLE>

+1, something looks a little funky up top, at 6500rpm, that dip doesn't look normal.

boost drop then pick up again?

 

theres something wrong. My buddies B16 was making 350 @ 17psi, and your setup dwarfs his...

Compression good?
post maps of the boost @ A/f..

 

a/f's were 12.0 accross the board. Compression was 200 in all cylinders. Boost never dips, just constantly increases and holds drop a little at 7900.

 

I think it might be a 48 hotside by the way it chokes and doesn't make the power it should up top.

 

your exhaust housings .48? lol yeah, you need swap that for a .63 if you plan to go higher than 500 you could always opt for the .82

I'm surprised full-race sold you the .48 with that kit.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JoePSI &raquo;</TD></TR><TR><TD CLASS="quote">your exhaust housings .48? lol yeah, you need swap that for a .63 if you plan to go higher than 500 you could always opt for the .82

I'm surprised full-race sold you the .48 with that kit.</TD></TR></TABLE>

That housing looks like it did very well. Looking at the torque it I would have to say something else is up.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nsxmatt &raquo;</TD></TR><TR><TD CLASS="quote">Who tuned it? </TD></TR></TABLE>

 

at 15 psi last year the car was a lot faster. A whole lot faster. After building a 325 whp daily driver I thought my other car was slow. Now I know there is a problem. At 15 psi it made 307 whp and 207 torque. The cams are not going to give me a whole lot. Just did a valve a adjustment. No diff in power.
I think the turbo is bad? 25psi 395 ait temps 125, torque 282. sohc ebay kits can make more.

 

I would have held off a little longer to get it tuned until you put some different cams and possibly some adjustable cam gears in their. Check the link below from Evans-Tuning when he did a comparison just between stock B16a cams and GSR cams. By going with the GSR cams and not changing anything else he gained like 20WHP and a better powerband. Now if you did that, you would be somewhere above 410WHP and then if you went with some aftermarket cams and cam gears I think you would be closer to your goal. But again, who tuned it?


http://www.evans-tuning.com/dy....html

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ramma &raquo;</TD></TR><TR><TD CLASS="quote">at 15 psi last year the car was a lot faster. A whole lot faster. After building a 325 whp daily driver I thought my other car was slow. Now I know there is a problem. At 15 psi it made 307 whp and 207 torque. The cams are not going to give me a whole lot. Just did a valve a adjustment. No diff in power.
I think the turbo is bad? 25psi 395 ait temps 125, torque 282. sohc ebay kits can make more. </TD></TR></TABLE>

Thats a great bit of info. Completely useless till you answer who tuned it and quit avoiding the question.

 

I guess winglets and intercooler sprayers do not give an extra 200whp like the ricers say. Your paint looks very nice though.

My buddy tuned a sohc with a 57trim (.63ar), 3" exhaust, 59300 cam, Y8 (oem) intake manifold, 8.2:1 wisecos, and a stock Z6 head. It was 35x WHP with 18psi.

Looks like it may have been tuned with a wideband that needs replacing, or the tuner used incredibly conservative timing. I know its risky, but try moving the dizzy to advance (or retarding) timing 1* each time - but be very careful of detonation. If it takes a lot more timing w/o pinging, the tuner was too conservative. If it pings with little advance, start retarding it. There are times where too much timing can create phantom detonation, which kills power.

Also pressure test the system. A boost leak at 25psi could really shoot the turbo off its efficiency range at some point, as it could be moving enough air to do 30+ psi (and overheats what doesn't leak).

Worst case it's the small housing that's the problem. It would decrease gains based more on PSI than on RPM. A bigger housing may see say 10% gains all over at 10psi, but see 20%+ at 20psi. Look around at other dynos, maybe the tuner has a graph of something similar, but with a .63ar housing. The manifold/cams could very well be helping a lot at the same time the housing is killing power. Adding cams with a restrictive exhaust can end up canceling gains & losses out.

 

the guy who tuned it is in the tuner direct. on the first page. 22psicrx. I was sitting next to him when he was doing it. Timing was synced to the dist and overall timming was increased to 15 and decreased. 15 degrees at 25 psi is high. It did not ping at all.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nsxmatt &raquo;</TD></TR><TR><TD CLASS="quote">

Thats a great bit of info. Completely useless till you answer who tuned it and quit avoiding the question. </TD></TR></TABLE>
Not avioding the question. Car was tuned on a dyna pack 4000 new innivative 02 sensor and dataloging was hooked up, tuned by 22PSICRX. He has tuned a lot of cars. The car before this one made 500whp at 20 psi. Same tuner same dyno.
there are no boost leaks.

 

adding cams will not give me the power goals that I have seen on simular setups. Also the car ran good last year and this year it is definately slower 307 at 15psi. The same motor same tuner made 357 and 246 at 20 psi on an 18 g turbo kit.
I still thinks its a turbo problem.

 

i think the bumper and mirrors are causing your problems. jk lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by patrick4588 &raquo;</TD></TR><TR><TD CLASS="quote">i think the bumper and mirrors are causing your problems. jk lol</TD></TR></TABLE>

lol.... probably not causing the problems with power, but those are a problem.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 97_coupe &raquo;</TD></TR><TR><TD CLASS="quote">I would have held off a little longer to get it tuned until you put some different cams and possibly some adjustable cam gears in their. Check the link below from Evans-Tuning when he did a comparison just between stock B16a cams and GSR cams. By going with the GSR cams and not changing anything else he gained like 20WHP and a better powerband. Now if you did that, you would be somewhere above 410WHP and then if you went with some aftermarket cams and cam gears I think you would be closer to your goal. But again, who tuned it?


http://www.evans-tuning.com/dy....html</TD></TR></TABLE>
i have seen his dyno chart of a b16 peak boost kit making 405whp at 16 psi.
there are plenty of good tuners, but we are talking about a hundred or so hp difference that is missing. Just trying find the problem. The setup is an old setup.
Again maybe the turbo is not performing.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by patrick4588 &raquo;</TD></TR><TR><TD CLASS="quote">i think the bumper and mirrors are causing your problems. jk lol</TD></TR></TABLE>I like this one, but the mirrors were turned around and still no gain came of it.

 

So the car only has a .48 a/r housing..?

If that is the case.. I am not surprised one bit.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93turbo16 &raquo;</TD></TR><TR><TD CLASS="quote">So the car only has a .48 a/r housing..?

If that is the case.. I am not surprised one bit.</TD></TR></TABLE>

Also, it looks like restriction or timing....... any headwork done?

 

So you upped the boost and it lost power? Too much overlap and over a 3:1 PR between intake and exhaust manifold pressure causing reversion. That or a severe boost leak or a thrust/shaft bearing problem in the turbo.

Pull of the carbon-fiber air filter and the JDM couplers (kidding!) off the turbo and give the compressor nut a spin with your hand. It should spin smoothly for a second or three. If it doesn't, its probably the turbo. Then use a pressure tester (home made, search for DIY guides) to pressurize the charge pipes from turbo outlet coupler to the TB coupler. If it looses less than 1psi per minute, its not enough to be a problem (even so try to find any leaks regardless).

I'd also PM The Shodan if I were you, although I probably know his reply. Never mismatch a large compressor with a small turbine or housing. Small spool increase is the price for a big power increase.

 

does it have adjustable cam gears, yeah the b16 cams are the least aggressive of the stock bunch, .48 with those cams and maybe some hidden small problems might have prevented you from the power you wanted.