My RB26 doesn't run well at high rpm

[turbo corey]

the car runs good and starts good.i am runing a gt42 turbo,pfc with no mafs,1000cc inj,fpr,255fp,44mm wg,50mm bov,fmic,greddy bc. let me no if you can help thanks

the 1st guy that tells me the problem and it gets fix i will send them 20.00 with paypal asap

[Shocker]

lol, sounds like an ign problem, possible needs a better tune....... check the plugs, make sure they are colder like 7's and gapped to .8......
Modified by Shocker at 11:53 PM 9/15/2007

[turbo corey]

i did that did not work .the car is being tuned on the dyno now and this is going on

[gawdzilla]

how much boost are you trying to run? i've had this problem before and it was the plugs. i haven't boosted the new setup hard yet but if you're running big boost and copper plugs you need to change them very often.

probably your plugs are getting weak spark (gap, age of plugs/fouled, or coils)

[lilskyline240]

try running the coldest plugs you can get and gap them very small. SOunds like weak spark to me

[turbo corey]

ok i will do that and see if it works

[turbo corey]

ok this is the plugs i have in the car now ngk r (bkr7es) i looked for a coolder plug like a 8 or 9 and i can not get them do not no y.this sucks i have a 600 hp rb26 and i can not get it to run right .it runs go and starts good but when it see 6000-6500 .i am runing 16-20 psi

[lilskyline240]

instead of NGK's try some iridiums. otherwise take your NGK's and gap them real small. Like .022, your idle will suffer but might help you up top with your spark problem

[turbo corey]

my gap is .o22

[lilskyline240]

then try some iridiums. you might have gone past the capabilities of the NGK plugs. or your coil packs arent up to the task

[eh?]

You need a better tuner Try freshalloy gt-r/gts-t forums. I think Rb motoring Sean or XS power Eric could lead in you the best direction.

[turbo corey]

i had iridiums in it

[turbo corey]

xat was tuning my car on the dyno .it was doing it on the dyno.

[gawdzilla]

turbo corey... you have AIM? hit me up... i'm blops714

[lilskyline240]

i had iridiums in it

in your previous post you said you had NGK plugs in there?

[turbo corey]

yes i have ngks in there now .

[turbo corey]

i do not have aim you can call me if you like

[lilskyline240]

What are you using for an ignition source?

[turbo corey]

stock

[lilskyline240]

Might want to upgrade your ignition system. for a 600hp car your probably out of the abilities of the stock ignition

[eh?]

Meh xat.. bunch of SR nut swingers... take your car to CFT or Titan..Tape your coils with electrical tape or get a new set or get splitfires.

[turbo corey]

electrical tape y

[blurrbosi]

Just in case of any arching... stock or aem?

[turbo corey]

i have a pfc with no mafs

[matafied]

NGK's ehhh! i havent got set of those to last me an hour before they start breakn up! def change them to start. i wasted 90 bucks on a set of ngk's

[eh?]

RB coils are known to crack, you may not see them when cold but they will open up enough so that the current will bleed to the mouting rather than go to the spark plug. Sometimes you can see burn marks on the coils from the arching. The electrical tap acts like a band aid.With your set up I'd just get splitfires right off the bat or new coils, which ever is cheaper.

[Abdo]

Tape your coils with electrical tape and get a Jacobs Electronics ignition system.

[turbo corey]

ok i got new coil packs and i put electrical tape on the coil packs .it still doing the same thing .can the timing do this ? can boost l

[lilskyline240]

yes timing can do this. What seems weird to me is you have the knowledge to build a 600+hp rb26 but you cant trouble shoot a small problem like this? whats your A/F ratio when this happens? do you backfire? do you throw flames out of your exhaust? how do your plugs look after this happens. smell of unburnt fuel?

[matafied]

have you changed those plugs lol im sure you have