Rb25 Neo Setup & Modification Advice Ideas

[Dose Pipe Sutututu]

Yea i understand that i dont have the fuel system for anything more then 18 psi.

what? lol

I run 875cc Siemens Deka IV and it is only hitting like 89% duty cycle at 24psi

I prefer to tune with loads of boost but very lazy timing rather than loads of timing but not so much boost.

Because you're on E85, EGTS are shit low

[Ke55pig]

Guess i just have to wait to see what the cyle is when there on the dyno.

I thought the whole idea was for heap of timing with e85 isnt timming safer then boost.

Id like to think with like 23 psi it would go over 400 but studs would be realy helpful for that

What power are you making with them only at 89 %

Edited October 23, 2015 by Ke55pig

[Dose Pipe Sutututu]

I don't know how much I'm making but last time I put it on a mainline 2WD dyno it made 340kW but only with 22psi but that was with stock stocks a little more timing. I'll shaved off the timing and added more boost for the track, against what everyone would think lol.

However I've got ARP studs and I've over torqued them to 108nm (non 2000 studs)

[Ke55pig]

I making 340 on mailine roller on 98

[Roy]

Out of interest, what do you reckon a 20G will make on e85 on a 25?

310 to 320rwkws should be a breeze with the 10cm housing. I made 310 on an RB20 with an 8cm housing

If its a street car put an 8cm housing on it and with E85 if there is a tad too much back pressure it wont matter. on 98 the backpressure woudl hold it back and make it puing with boost and exhaust but with E85... I know the 8cm housing on the 20G on my RB25 was EPIC.

[R31 drift pig]

310 to 320rwkws should be a breeze with the 10cm housing. I made 310 on an RB20 with an 8cm housing

If its a street car put an 8cm housing on it and with E85 if there is a tad too much back pressure it wont matter. on 98 the backpressure woudl hold it back and make it puing with boost and exhaust but with E85... I know the 8cm housing on the 20G on my RB25 was EPIC.

I have a L2 20G 10cm. I was hopeful of around 330-340 with the cams Ive put in, camtech 264/268 9mm's. Cant seem to find a lot about the l2 20g on a 25 for some reason, mostly the 25g/t67.

I making 340 on mailine roller on 98

Ive been in a r34 with a t67 25g 10cm, and less engine work done (Injectors/FMIC/Power FC/Z32/Nismo Pump/Exhaust and turbo kit) and it was pretty damn good on the road, made 300ish on 98, so I can only imagine how good yours'll be with the extra gear on e85.

Edited October 24, 2015 by R31 drift pig

[Ke55pig]

Yea looking foward to it its bye no means slow just needs more mid more then happy to make no more peak on e85.

It will be on dyno to sort out splutter jolting issue as soon as goes into positive pressure/boost.

New cas new afm new coils and new loom didnt fix hopeing its a easy fix fingers crossed

Edited October 25, 2015 by Ke55pig

[Dose Pipe Sutututu]

gap down to 0.5mm

[Ke55pig]

I have ran them at .8 everytime without issue it only does it after 20 mins of drving normaly goes perfect then turns to shiat

[Dose Pipe Sutututu]

Coils get hot, and they aren't as effective.. just gap them down man.

[Ke55pig]

Ill give it a shot really doubt it though they were fine on my 2 year old ones has brand new ones now

[Ke55pig]

Really keen for friday.

Fingers crossed my injectors and 044 can handle 360 ish wish me luck other wise its time for anothet pump and new injectors grr

[DRF72]

Hey mate, just looking at this. In your first post with the dyno sheet, the AFR's get REALLY rich as your starting to make power it looks like 11.4:1 ish but for some reason, being not enough time invested by the tuner or unstable fuel pressure the AFR's are all over the shop.

If the tuner can get a stable 12:1 AFR's while under full load that will also help with the miss and help in ramping up your mid range( it's not going to be a crazy gain but power delivery will be a lot more smoother and keep the heat higher in your exhaust to allow for greater thermal expansion and inturn turn the turbo faster)

Just a few things that seem to jump out at me.

Good luck with E85, you won't look back.

[Dose Pipe Sutututu]

Going rich as you reach peak torque and at peak torque will prevent knock, especially on 98RON. I assume that was done on purpose.

On E85, that doesn't matter so much...

I personally tune my car and my mates car using the same technique.. as it approaches max torque and is at max torque AFRs are in the 11.5 region and as torque dies down it leans up to nearly 12

[Ke55pig]

Yes i beleive that was done rich on purpose.

Hopefully got enough fuel for e85 and not run lean lol fingers crossed

[Dose Pipe Sutututu]

be a little dodgy, bump up the base fuel pressure

[DRF72]

Seen this done quite a bit at the track.

[Ke55pig]

This fix the injector issue will it fix the pump issue ?

[WMDC35]

Help with injector flow but the pump will have to work a bit harder, if you run out of injector first more fuel pressure, if run out of pump first less fuel pressure

[R31 drift pig]

I reckon you'll still scoot through with the pump. My tuner recommended 360-odd on a single 044 (what I have done with my 33), but said that 400 can be done.