Ok <U>first</U> let me start with the setup -

B18C1 bore 20 over
CP 9:1 pistons
Eagle H beam rods, ARP bolts
T3/T04E ~ 57 Trim Garrett Turbo (50/63 A/R) T3/T4
Revhard manifold with Swaintech coating
Tial wastegate 10psi
Greddy Type S BOV
Modine IC
3" custom DP with 3" exhaust (Kteller) 3'' flex, and 3'' magnaflow
Walbro 255 pump
450 blue tops
uberdata tuned
3bar MAP

<U>Next</U>, the dyno graph -



I cant say that I am disappointed with the results. Because I had no idea what to expect.

<U>First Question</U>
1.Now the a/f ratio was in the 13's-14:1 BEFORE vtec. After vtec it calmed down and we got a 12.2~ish all the way to redline. Ben (Snail Tuning here on h-t, my tuner) has tried to get a better ratio before vtec but to no luck. Any ideas?
2. What should my timing be set at? Right now it sits at .8 degrees retard per 1lb. of boost.
3. Are these numbers to be expected for my setup at 10lbs. of boost?
4. Any other pointers would be great... please no flamming

Thanks goes to Snail Tuning and Back Street Performance for getting me on the dyno in less then a days time

http://www.backstreetper.com/



Modified by VTECisSeXY at 8:46 PM 3/9/2005

 

seems kinda low to me. that setup has potential to break 300 hp on that much boost.

 

https://honda-tech.com/zerothread?id=1164841

^^this guy broke 300 with a pretty similar setup to yours except it was done on a stock gsr block. i plan on breaking 300 hp as well on 10 or 11 psi with my stock gsr. just an idea of how much you should be shooting for.

 

yea i agree it seems kinda low.. but that guy ran stock compression

 

ignition problem. See how jaggy the lines are.. might want to start replacing stuff.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VTECisSeXY &raquo;</TD></TR><TR><TD CLASS="quote">yea i agree it seems kinda low.. but that guy ran stock compression </TD></TR></TABLE>

rofl, you see boosted-hybrid's comparison? Difference in power was like 10 WHP under boost from 10:1 to 9:1. Doesn't make much of a difference at all.

 

ahh shoulda read more

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93turbo16 &raquo;</TD></TR><TR><TD CLASS="quote">ignition problem. See how jaggy the lines are.. might want to start replacing stuff.</TD></TR></TABLE>

Seems that way

 

i would definately say you should be in the 300's easily with built block and 10psi.

i am shooting for 280 on my ls at 10psi w/ stock internals....we shall see

i would expect bigger numbers

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93turbo16 &raquo;</TD></TR><TR><TD CLASS="quote">ignition problem. See how jaggy the lines are.. might want to start replacing stuff.</TD></TR></TABLE>

Disagree...I think it had no smoothening enabled...if it did have jagged lines it would only be in the higher RPMS....those numbers are low for 10PSI on a 9:1 witha 57 trim. Hmm....might want to talk to your tunner or post up your map. Also have you done a compression check....just throwing out ideas&gt;?

 

Ben (snail tuning) will be online a little later.. just called him
He has the map

 

yea those numbers are weak. I agree with the ignition problem.

 

I vouch for those numbers to be very weak for a GSR. I made 259whp @ 211wtq on a bone stock LS at 10psi.. I wish I knew what was wrong...Good luck on that

Khoi

 

thanks for the input guys

 

I would also like to see the fuel and ign maps. Something is up?

 

kinda low with a built gsr..

 

Unfortunately I have to agree. That is VERY low for Built GS-R, and main timing should be adjusted by your software, not an overall base from your distributor or a BTM....

That should be about 280-300 on stock compression stock block..

Something else is up..

 

Aside from the obvious A/F issues, was the timing tweaked at all on the dyno?

 

on 10psi i made 320hp and 255tq i have 84.5 mm bore

 

o my the pics













Last two are the 2d highs and lows. The rest of them can be identified by the tab that is highlighted.

thanks ben

 

i sent him some pictures.

as for the a/f problems. no idea why they are off as bad as they were. i mean 2-3 months ago when we tuned, the car was in perfect a/f ratio. at 3grand it would go from 13.0down to 12 at 4psi, and hold at 12-12.2 from 4k-8k, not its kindove scrambled, and to lean it was running upwards of 12.5-12.7 on the dyno.

But even with it lean it should have had higher numbers.

I have had no experiance with adjusting timing, and i have read keeping it close to 16degrees seems to work good, and keep detonation low. so thats about what the setup was running at. this was my 2nd time on a dyno, and first time able to make any changes, or see how things played out. we weren;t on the dyno much, maybe an hr tops, because we just wanted to see what numbers this would put out. not really a tuning session. whenever it warms up, im ganna straiten out the a/f curve again. any pointers would be great. and if there is something noticably wronge with the tune, please don't flame, just help us out. im new to this.



the timing was retarded alittle more when we first got there, and i added 2% back from 4200RPM 9lbs of boost up to 8000rpm and highest boost possible. that gained 20 whp in some areas, but without any way to detect nock, we didn;t want to add anymore.


Modified by Snail Tuning at 10:31 PM 3/9/2005

 

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

Disagree...I think it had no smoothening enabled...if it did have jagged lines it would only be in the higher RPMS....those numbers are low for 10PSI on a 9:1 witha 57 trim. Hmm....might want to talk to your tunner or post up your map. Also have you done a compression check....just throwing out ideas&gt;? </TD></TR></TABLE>

I do think that the graph didn't have smootherning enabled, but that is true of igniton problems. The graph will get jagged, I just played around with a car that did the same thing and had a bad coil. If you took too much timing out the lines would get jagged. I am still betting something with ignition.

As far as the tuning goes,( I didn't notice the scalars.. it does look like you have a good bit of timing up there, I would knock it down a few degrees and go from there. Also that ignition map isn't a stock GSR last time I checked, at 10 lbs, with .8 retard you should be a whole lot lower than what it is now. I would make a new map, and copy paste them, and see it that helps. Are you positive about the actually timing at the dizzy? And, the same with plug gap and plugs.

 

IMO I think you have too much timing for 10 psi. I've tuned a few cars and I normally end up with about 20-22 degrees(on pump gas). that excess timing could be why your dyno looks so choppy. just my .02

 

Those numbers do seems low.....My built SOHC non vtec is putting down about 245 to the wheels on 10psi with a street tune. But I'm also running like 11.5:1 af/r. I would look into it a little more.

 

You're running as much total timing as I was on 100 oct, on a B16A setup.