what the hell is wrong here...cause something is drastically wrong......



bigger pic at http://massj1.homestead.com/files/fuckup_dyno.JPG




Modified by GOLDBERG at 5:34 AM 5/2/2005

 

pics not working...

 

setup is....
lsvtec
jg cam gears
skunk2 im
pr3 pistons
an-r header
gsr tb bored by maxbore
aemitr cai
m22 cams
rocket valvetrain
hondata s200
370cc injectors
walbro fuel pump
fpr



Modified by GOLDBERG at 9:26 PM 5/4/2005

 

what about now?

 

Needs tuning? Setup looks pretty nice.

 

thats just the problem..that is after tuning..before tuning it was even worse... a bigger pic is available at http://massj1.homestead.com/files/fuckup_dyno.JPG

 

Hmmm....I'd say take it to another tuner, and make sure there are no other problems with the engine like bad compression, bent/burnt valves, timing belt off a tooth or something.

 

do a compression test. Is this a freshly built engine?

 

a stock ls will lay down close to those torque numbers lol

 

what you using for engine managment?

you can expect 370cc injectors to run right off the stock ECU program......

looking at that torque curve i would say your have some serious fuel issues....

 

um i stated above...hondata...fuel at wot is round 13.2ish....partial like 14.7...cam gears untouched..maybe the dudes wideband is off?

oh yeah another thing is compression is only like 175-185 across the board.. but engine doesnt smoke bad or anything

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GOLDBERG &raquo;</TD></TR><TR><TD CLASS="quote">um i stated above...hondata...fuel at wot is round 13.2ish....partial like 14.7...cam gears untouched..maybe the dudes wideband is off?

oh yeah another thing is compression is only like 175-185 across the board.. but engine doesnt smoke bad or anything </TD></TR></TABLE>


that compression is low for pr3 pistons you must be experincing blow buy did you go with oversize pistons and rings or just hone and use 81mm again

 

i was thinkin rings too..but it isnt smoking like a ****.......

 

do a leakdown yet?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LG_R32 &raquo;</TD></TR><TR><TD CLASS="quote">that compression is low for pr3 pistons you must be experincing blow buy did you go with oversize pistons and rings or just hone and use 81mm again </TD></TR></TABLE>

i second that... my first attempt with the ls/vtec resulted in ok compression numbers but the #4 cylinder rings weren't setting because the cylinder was honed out too much... went with the oversized and problem solved.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GOLDBERG &raquo;</TD></TR><TR><TD CLASS="quote">um i stated above...hondata...fuel at wot is round 13.2ish....partial like 14.7...cam gears untouched..maybe the dudes wideband is off?

oh yeah another thing is compression is only like 175-185 across the board.. but engine doesnt smoke bad or anything </TD></TR></TABLE>

Well, I have an idea, and you even support my idea with the compression numbers. How can u call it tuned w/o touching the cam gears. You know that those cams might prefer a little advance or retard to get right in time. I dont have much experience with the m22's.

Also was the ignition timing set on the motor? Then i would try eliminating some overlap in teh cams, (advance exhaust more than intake) and see if you arent bleeding out your compression. (This was happening with my cams)

Also, do you have a milled head? Or two layer gasket? This will also require you to advance both intake and exhaust to get it in time.

If your dead sure that the cars in time, try to eliminate some overlap, or play with the cam gears a little and see if u can get the compression #'s to go up.

 

yeah i told the tuner too adjust the cam gears..he just gave me a dumbass remark.....rocket says the cam gears might be off so to try the stock cam gears..

 

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

i second that... my first attempt with the ls/vtec resulted in ok compression numbers but the #4 cylinder rings weren't setting because the cylinder was honed out too much... went with the oversized and problem solved.</TD></TR></TABLE>

it all depends..i've seen engines get a light hone on rebuild and the rings seated perfectly..i've even stuffed new rings without hone and they seated perfectly.....I have my money on cam gears being out of adjustment

 

I wouldnt do the stock ones, i would just play with the ones u got a little. 1 or 2 degrees each way on the intake and do the same with the exhaust as the intake.

Also, once u find a good spot where they run and they are the same degrees advanced or retarded, try to advance or retard the exhaust 1 degree and see if it likes it or not.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GOLDBERG &raquo;</TD></TR><TR><TD CLASS="quote">oh yeah another thing is compression is only like 175-185 across the board.. but engine doesnt smoke bad or anything </TD></TR></TABLE>

175-185 compression is right around 9:1 compression. You need to leakdown the engine and determine where your compression is being lost. If any combustion chamber work was done on the head it will lose cc's and take away from the static compression. Make sure that you are TDC at the crank and cam gear.

 

hmm well its all leaking from the rings...cylinder 1-3 is below 10% somewhere but cylinder #4 is about 20% leakage...would that account for the massive power loss?

 

I dont think you would lose 30 lbs of torque from that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GOLDBERG &raquo;</TD></TR><TR><TD CLASS="quote">hmm well its all leaking from the rings...cylinder 1-3 is below 10% somewhere but cylinder #4 is about 20% leakage...would that account for the massive power loss?</TD></TR></TABLE>

Yes. There are many builders that will junk the motor after 3%. (in higher end apps.)

-s

 

well 10 percent is ok, 20 percent isnt good, Like i said i really wouldnt expect that much loss from it but i havent had a motor like that so i wouldnt know.

 

with some good tunning u should be good,, ur setup looks pretty good....