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Need Some Info On Ignition Advance, Rb25det

isijappanisi
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isijappanisi Apprentice

isijappanisi

Posted
Posted

Hi,

Has anyone got an ignition map which i could compare to mine? got way too low power output on the dynapack today.

My tuner wasn't sure how much ignition the RB25DET could deal with.

So this is my ignition map, got 383RWHP and 390 NM of tourque @ 1.4 bars on a GT3582R

ignition.jpg

If any one has got a 400++ RWHP ignition map, could you please share it with me?

On PM or in this thread.

Thanks,

Stian

Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted

Hey

There must be something wrong there. my engine made 400rwhp on 17psi.

Here is my old timing map when my car made 487rwhp.

If your tuner is not sure what timing a rb25det can take then i would be worried if i was you. Every engine takes different timing. Different configurations = different tuning.

That was 24psi with a GT3582r to make 487rwhp.

This tune was back in the day when i used to run huge timing on cruise.

I remember on 17psi or 16 i think it was with 18deg timing it made 406rwhp.. stock cams

post-1240-1210031627_thumb.jpg

Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted

too early in the power range for valve float....

I think its something simple. check cam timing... what kind of exaust / manifolds are you using ?

what computer is that ? haltach or autronic or something?

anyway post up the setup of your car and we might be able to help track the issue down.

have you tried running the car on the dyno with the exaust dropped just before the cat?

try that

isijappanisi Apprentice

isijappanisi

Posted
  • Author
Posted
too early in the power range for valve float....

I think its something simple. check cam timing... what kind of exaust / manifolds are you using ?

what computer is that ? haltach or autronic or something?

anyway post up the setup of your car and we might be able to help track the issue down.

have you tried running the car on the dyno with the exaust dropped just before the cat?

try that

Hi,

This is the engine:

· 1.6 mm Greddy Head Gasket

· HKS Timing Belt

· Greddy Plenum

· Splitfire Coils

· Tomei Poncams

· Tial 44 mm Wastegate

· XS power style exhaust manifold

· Garrett GT3582R A/R .82

· FMIC

· Nismo 555cc Injectors

· Walbro 255 l/m in tank fuel pump

· HKS air filter

· 3” elbow/downpipe, with cat replacer.

· 3" Greddy cat back

Running with NGK BCPR7ES spark plugs, 0.9 mm gap.

My computer is GTSlink.

Going to check the cam timing later this day.

Thanks!

PM-R33 Grand Master

PM-R33

Posted
Posted (edited)

Hmm strange, AFR's seem allright and the power curve doesnt have any abnormal dips. It's almost as if something is holding it back. Are the cams dialed in correctly? Compression on all 6 cylinders fine? That setup should be making around 330-350kw@wheels on 1.4bar with bigger injectors :bomb_ie: What's the injector duty cycle on the 555's?

Edited by PM-R33
Ionos Community Regular

Ionos

Posted
Posted (edited)

I'm making 235rwkw at 1.2 bar (HKS GT2535) and can only run 10 degrees of advance at full power :thumbsup: 98 Octane of course. From looking at that timing here others are running 15 degrees or more. What gives?

Edited by Ionos

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