after a long painful build finally i got the car tuned after having misfiring problem for ages

and i still got dissapointed with the final power figure

its only making 335whp @ 15psi

b18c
81.5mm 9:1 JE pistons
Eagle Rods
JG manifold
70mm TB
M&W pro 10 ignition
sc61 ---- > S housing with .63 a/r turbine housing and P-trim wheel

so pissed off

 

what are you tuning with? afr's? timing? size of DP and exhaust?

 

autronic computer
3" downpipe - open exhaust ( e-cutout )

 

what are plugs gapped to? did you check for boost leaks? valves adjusted correctly? Do a leakdown lately?.... start there atleast

 

what kind of dyno? happen to be a dyno dynamics or something?

 

every dyno reads different, some dynos if they are not setup right can read really up

also check for boost leaks

 

what injectors are you running? who is ur t uner?

 

timing set properly?

 

what manifold (log, short runner, topmount)? what turbo? a properly spec'ed turbo kit can make a world of difference.

if you had a rev-hard kit, i'd say you on the money. if your running full-race then i'd say your way low.

??????

 

What were your misfire issues caused by?

 

Give us a little more info on your setup, maybe we can narrow something down

 

post the dyno graph and the full setup

 

up the boost. i have a similar sized turbo and it did about the came until we hit 17psi, then the power jumped exponetially. maybe ur not in the efficiency yet

 

i kinda doubt it.. the last car i did w/an sc61 made 340 at 8psi

 

we assumed the misfiring was caused by an old tired dizzy cap and rotor ( they looked bad anyway )
so to save me from more headache i just told him to install m&w pro10 + crane coil, well that fixed the misfiring

my turbo setup is completely custom, heres my full setup:

81.5mm 9:1 JE pistons
Eagle Rods
Darton solid sleeves
SuperTech dual valve springs + retainers
ITR cams
Adj cam gears
JG manifold
70mm TB
SC61 turbo S housing + P-trim wheel in .63 a/r housing
custom high mount turbo manifold
880cc precision injectors + walbro pump

it was dynoed on a rolling dyno type ( dyno dynamics ?? )
car seems going really hard it just the final power figure really really dissapointed me

 

forgot to mention plugs are NGK platinum heat range 8, not quite sure about the gap tho

 

Hp/TQ numbers are exactly that. Numbers are numbers. If the car feels strong and you're happy with it, then the numbers shouldn't matter.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Cyber ITR &raquo;</TD></TR><TR><TD CLASS="quote">forgot to mention plugs are NGK platinum heat range 8, not quite sure about the gap tho</TD></TR></TABLE>

OMG. get those POS plugs out of your engine. NGK V-Power 7's (copper core) .025gap pn: 4091 i believe. and their only $2ea.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wade &raquo;</TD></TR><TR><TD CLASS="quote">what are plugs gapped to? did you check for boost leaks? valves adjusted correctly? Do a leakdown lately?.... start there atleast</TD></TR></TABLE>


im going to have to side with wade on this one...

valves adjusted correctly ?

how old are your injectors?

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

OMG. get those POS plugs out of your engine. NGK V-Power 7's (copper core) .025gap pn: 4091 i believe. and their only $2ea. </TD></TR></TABLE>

never run platinum plugs either.....

 

I would take it to the track. Obviously you were expecting a strong 11 sec. car if 335whp was depressing. Run it man, you'll feel alot better if you hit your goal on the track. And personally, I'd say it's more braggin' rights to have super times with such low dyno #'s.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Cyber ITR &raquo;</TD></TR><TR><TD CLASS="quote">after a long painful build finally i got the car tuned after having misfiring problem for ages

and i still got dissapointed with the final power figure

its only making 335whp @ 15psi

b18c
81.5mm 9:1 JE pistons
Eagle Rods
JG manifold
70mm TB
M&W pro 10 ignition
sc61 ---- &gt; S housing with .63 a/r turbine housing and P-trim wheel

so pissed off </TD></TR></TABLE>

If you would, post up the dyno..

Run someone w/a car you think would be close..see what happens...??

But I do think for the mods the #'s are low, but track and mph tell a different story..

 

Dyno dynamics read typifcally 15-17% lower than dynojets.... post a graph!

 

Don't mean to thread jack, but why not run platinum? What about denso iridium? Thanks

 

denso iridum are fragile.. dont run em... in the event that you do get a little detonation the insulator will break and trash stuff.

i run ngk iridum in everything, something making over 300 on pump gas id run an 8 heat range.

 

I thought irridium was mainly for plug life? One reason I ask is because all the plug info I've seen leads to that, and my friend's IS300 only had to change out the oem iridium plugs at 45k.