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Problem With Rb25Det Tuning

zubrowka

By zubrowka,
in Engines & Forced Induction

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zubrowka Apprentice

zubrowka

Posted
Posted

Hey. Help me pleace, has serious problem. Have asked and searched around without result, is a bit desperat. So I hope some one can help me.

Have an s13 with RB25DET Generation 2, with:

Eagle rods

CP piston

Tomei poncams

80mm throttle body

aftermarket intake

ported Garret GT3540r .82 ar

Split Fire Ignition coils

Link G3 ECU

1.2 mm head gasket

Denso 850cc injectors

Aeromotive A1000 fuel pump

Apexi avcr

52mm wastegate

adjustable cam gears.

Have run it on the dynapack, according to the afr it leen out between 4700-5000, I cant gett higher rpm, but if I keep the pedal to the floor in a few seconds it goes over 5000rpm and hit the barrier at 7500 RPMs with no problem. Nothing is registrated in the link g3, it is the same problem when standing still so when I drive the car.

Any settings that are wrong?

Some one have a mapp I could try or compare with?

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https://www.sau.com.au/forums/topic/428661-problem-with-rb25det-tuning/
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Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

I just looked at the map you sent me, clearly there's less fuel between 4500 rpm and 5000rpm which explains your flat spot.

Don't use the AFR targets and assume it will work on load, you need to adjust the 'Fuel Table 1' tab, your timings look safe enough at 1bar at 17 degrees on song till redline.

see at 100kpa at 4500 it's set at 48.2, then at 5000 it's at 45.3, etc,

zubrowka Apprentice

zubrowka

Posted
  • Author
Posted

I just looked at the map you sent me, clearly there's less fuel between 4500 rpm and 5000rpm which explains your flat spot.

Don't use the AFR targets and assume it will work on load, you need to adjust the 'Fuel Table 1' tab, your timings look safe enough at 1bar at 17 degrees on song till redline.

see at 100kpa at 4500 it's set at 48.2, then at 5000 it's at 45.3, etc,

Thanks. I have to take a look at that.

are the injectors side feed? or did you convert to a top feed with the aftermarket plenum ?

what injectors are they exactly? got a part number?

Denso 850. Side feed. High-impedance. Dont have the part number, can take a look att the injectors, meybe i find the part number on the injector.

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

has it got a vct fuel or ign compensation table sounds like something to do with vct?

he emailed me his map, it just looks terrible... he's only configured the AFR targets table and left the fuel table as is, there's a total lack of fuel where he's car is leaning out. You can just look at the map and tell it's going to lean out without even needing to put the car on the dyno

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