1.5 suprcharged dyno and tuning Q's.
 

Hi,
just got back from tuning
2 hours on the dyno(took a while cuz the car kept knocking out their wideband's)

I'm pretty happy with the results. Hp especially.
tq seems a bit low, but it is a 1.5L afterall

I was wondering what you thought about this though,
I completely forgot that I had my base(dizzy) timing set to 12deg btc, when stock is 16deg,
the tuner thought it was 16 and tuned with that in mind..
afterwards once I realized this, I was already off the dyno, but they turned the dizzy up to 15deg, car felt noticeably better actually.

I'm curious what some of you guys with tuning experience think about this,
I'm guessing it's making more power/tq than the chart shows now that theres more advance running thru it.
would it be worth going back for a returne? $$ wise I probably shouldn't.. but it would be cool to make more power..
Also if you look at the AF ratio, theres more leaning out that could be done on the top end,
and they said that there is more to be made up there, but we were already on the dyno for 2hours and i'm not a rich man!!

Any ideas on how I could make more torque, especially up top,
would leaning it out do it, or ignition tuning?

Just lmk any thoughts you have.

heres the chart/specs
92 cx hatch
jdm d15b vtec(all stock)
JRSC at 9psi
tunertoyz/stealthmode injectors(450cc)
B&M FPR/gauge
I/E stock header
http://home.comcast.net/%7Etadman3d/d15bdynA.JPG

Re: 1.5 suprcharged dyno and tuning Q's.
 

nice! Good power with the jrsc :). Your afr isn't that rich up top. 11.5 is a pretty safe afr to stick with. I doubt you will notice much difference at all between 11.5 and 12:1. Now adding back some timing could definintly gain you some more power. Post up your timing maps.

Re: 1.5 suprcharged dyno and tuning Q's.
 

Keep in mind if you upped your timing that will eat up some fuel. You may be a bit leaner now than on the dyno.

Re: 1.5 suprcharged dyno and tuning Q's.
 

What tuner doesn't know what the timing is set at before he tunes it. :P

But, if you can atleast let him hook up a wideband to it for a street tune just to regulate it. But I would say you are still safe, if he didn't mess too much with the timing and it was already pretty close to where it needed to be.

Re: 1.5 suprcharged dyno and tuning Q's.
 

Revving a stock D15b to 7800?

Re: 1.5 suprcharged dyno and tuning Q's.
 

haha yea checking the timing is a good thing. My friend swore up and down that he set the timing correctly on his jdm h22 and i couldn't figure out why i couldn't keep his car from pinging with conservative timing and a rich afr. It turns out his timing was way advanced because he was aiming for the wrong mark. After that it ran great :P

Re: 1.5 suprcharged dyno and tuning Q's.
 

OK good info!

First off,
yeah I would have liked it if they would have caught my timing while on the dyno..
but I don't really hold it against them, they are good tuners, and had alot of stuff to deal with that day.
He did say multiple times to make sure I had my car running right before coming in.

Oh aftwards I was asking about how he tuned timing, and from what I could gather he retarded it alot as it got up there.
and It got to around 19deg, so I guess that was 19deg total timing? And he did that under the assumption that dizzy timing was 16deg.

Also, SOHCmshue, your story about your guy with his h22 brings up another question,
if the AFR is safe, how do know that it's pinging/detonating?

And yeah, they did say that if I wanted I could go back and hook up a portable wideband to it, just to make sure things are safe.
But they thought that probably bumping the dizzy back up to 15 like we did only leaned up the AFR by like .2
but AGAIN it makes me wonder, if you can ping with a proper AFR, what is the benefit of checking that AFR again with a wideband?
I'd like to go up 1 more deg, back to 16 at the dizzy, cuz I could definetely feel improvement when we went up to 15.

Thanks!

Re: 1.5 suprcharged dyno and tuning Q's.
 

i could tell his car was pinging because it was very audible. The afr didn't have anything to do with his pinging. It was because he was running waaaaaay too much timing advance because the dizzy was adjusted wrong.

Re: 1.5 suprcharged dyno and tuning Q's.
 

How bad was his dizzy adjusted?
I'm alil scared cuz I cannot hear pinging. loud exhaust and a supercharger SCCREAAAMIN y'kno
no EGT gauge either ..

Re: 1.5 suprcharged dyno and tuning Q's.
 

you would know if you were pinging, just roll with the timing set like it is untill you can afford to hit the dyno again, it shouldnt take 2 hours to re-tune the timing