did some dyno work yesterday.lol

[rockabilly]

well some of you know the car by now, and as i have have fitted a new turbo it was time for a tweek on the map..

still got some misfire issues and could only run 1.9 bar boost, but heres, the graph.

spec is.
rb30 block fully prepped with spool rods and cp forged pistons
n1 oil/water pumps,
jun stage one cams 264/272 9.7mm lift
1000ccs injectors,
twin in-tank tomei pumps feeding both ends of the rail, 8mm return to tank fitted.
gt4094r turbo, 50mm turbosmart gate, 4" downpipe.
plus usual bits lol.

[vizibledog]

709bhp is not too bad. Suppose it'll do for nipping down to asda










That is one seriously fantastic car you have dude.

[Ahapartridge]

Looking better Mr Bernie, when's my go?

[Nick]

Damn that must be some fun Bernie

[rockabilly]

its lively nick

[Spearmint]

Excellent result Bernie, any clues on the misfire issue?

[rockabilly]

well as you guys know this misfire has been on for 3000 miles no but only on higher boost levels. we have changed the ign amp, regapped plugs to .6/.8/1.0mm no joy, fitted a hks twin power amp,removed splitfires and fitted std coils that helped, spoke to tweenierob today and its possible that the afr,s are going into the 10,s on full boost which in his eyes would cause misfires at high boost as the rb,s dont like much more than 11.6-8 afr,s also we could not boost more than 1.9 bar, even with the avcr at 90% duty, so we piped the wastegate up direct and it went to 2.4 bar, it appears the spring is to weak and as i have a spare stiffer one will need to fit that now.. but if anyone has any othe ideas please reply on this thread.

p.s did a compression test as the motor has done 4000 miles now and all six cylinders were 150psi give or take 2 psi..

[marroon-sky]

looking good mate remind me not to try and keep up with you lol

[Lambo Door Kits Ltd.]

Doing well my friend, be a while before I catch up with you.

[MR Y]

All that power, you live right up the road and i STILL havent set foot in it! I promise not to criticise your driving like you did mine

[Bubble]

you are a true nutter Bernie

Hope you manage to get that missfire sorted out soon and crank up the boost

[rockabilly]

see you friday mucker..

p.s. nice hat...

[Honey]

A very nice figure there Bernie, I too hope you manage to sort out the few teething problems.

See you Friday at JAE.

[Checkpoint]

Originally Posted by rockabilly

well as you guys know this misfire has been on for 3000 miles no but only on higher boost levels. we have changed the ign amp, regapped plugs to .6/.8/1.0mm no joy, fitted a hks twin power amp,removed splitfires and fitted std coils that helped, spoke to tweenierob today and its possible that the afr,s are going into the 10,s on full boost which in his eyes would cause misfires at high boost as the rb,s dont like much more than 11.6-8 afr,s also we could not boost more than 1.9 bar, even with the avcr at 90% duty, so we piped the wastegate up direct and it went to 2.4 bar, it appears the spring is to weak and as i have a spare stiffer one will need to fit that now.. but if anyone has any othe ideas please reply on this thread.

p.s did a compression test as the motor has done 4000 miles now and all six cylinders were 150psi give or take 2 psi..

With what you've rightly tried the wastegate spring is too weak.

We have a GT4094 on a 2litre Evo, it is an amazing turbo, believe it or not the Evo makes boost at roughly the same time as yours! Cam choice does a lot for this.

We usually upgrade to CDI ignitions as the std stuff is normally way out of its league at these levels especially with high rpm

[rockabilly]

cheers calum, will look into that mate. bernie