Finally cranked up boost and dyno'd

Discuss the RB20, RB25 and RB26 series engines.
RRRRB
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This swap has been in the car since 09, recently switched to E85 and cranked up the boost

Had to stop because we were out of fuel, but happy with the numbers and probably wont bother with bigger injectors this year.

Rb25 bottom end rb26 Head
6766 turbo
ported head
260 Tomei cams

Image


Largekid
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solid graph! Whats your fuel system and how much boost?

RRRRB
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twin 044's 1200cc injectors
30psi

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HxC_Nismo
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very impressive man, how does the idle sound with the tomei 260 cams, cause Im still wondering how mine is going to sound at idle, since im running the same cams.

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HxC_Nismo
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also what spark plugs are you running and at what gap, cause im really considering running e85. Im running twin bosch 044 twin feed pumps with injector dynamic 2000cc injectors with tomei 260 cams and ported head with 3 angle valve job and i wanna do a e85 tune, cause i think i can break 800hp with e85, but my 93 with meth injection i think it will be around the low 700hp range.

Yellow4g63
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When you going to hit the track RRRRB?

RRRRB
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Idle is pretty much like stock, maybe a little lope/chop at times but very mild.

I'm using Iridium 8's gapped at .025 with Splitfire coils, id be careful with Meth as even cylinder distribution can be tricky with ITB's or just being an inline 6 in general. should be able to make 550-600whp on just pump.

I went to the track a few times last year, thats kinda how the car got where its at, beings i broke 2 rear ends and 3 axles i have upgraded to an R230 rear end and R32 GTR axles.

I will probably see the track in the next couple months when the weather gets a little better, hopefully it all holds together haha be interesting to see how the transmission tolerates this new power.

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HxC_Nismo
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RRRRB wrote:Idle is pretty much like stock, maybe a little lope/chop at times but very mild.

I'm using Iridium 8's gapped at .025 with Splitfire coils, id be careful with Meth as even cylinder distribution can be tricky with ITB's or just being an inline 6 in general. should be able to make 550-600whp on just pump.

I went to the track a few times last year, thats kinda how the car got where its at, beings i broke 2 rear ends and 3 axles i have upgraded to an R230 rear end and R32 GTR axles.

I will probably see the track in the next couple months when the weather gets a little better, hopefully it all holds together haha be interesting to see how the transmission tolerates this new power.
thanks for the info, the meth setup should be just fine plus i have a fail safe setup on it so if the meth injection fails or low fluid it will turn off my boost controller and just run on wg spring pressure. But I am debating on e85, but i want to see what I can make out of the pump and meth setup first since im kinda tapped on car funds at the moment because of the body and paint im getting done at the moment. what fuel psi are you running for your e85 setup since we have identical fuel set ups.

RRRRB
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60 psi base 1:1 rise with boost so 90 total

You said you have 2000cc I'm running 1200

You should be fine.

I had 2000cc injectors and I had a hard time getting them to cruise at a reasonable AFR on pump gas, so I down graded.

julio
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Looks like that intake mani/single throttle/ported heads combo works well. Holds torque much better than I would have thought for that boost.

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HxC_Nismo
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RRRRB wrote:60 psi base 1:1 rise with boost so 90 total

You said you have 2000cc I'm running 1200

You should be fine.

I had 2000cc injectors and I had a hard time getting them to cruise at a reasonable AFR on pump gas, so I down graded.
Injector Dynamics are known for having great idle capabilities with large cc injectors so thats why i bought em.

RRRRB
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HxC_Nismo wrote:
RRRRB wrote:60 psi base 1:1 rise with boost so 90 total

You said you have 2000cc I'm running 1200

You should be fine.

I had 2000cc injectors and I had a hard time getting them to cruise at a reasonable AFR on pump gas, so I down graded.
Injector Dynamics are known for having great idle capabilities with large cc injectors so thats why i bought em.
Thats what i had, and i wasn't satisfied in the slightest, with part throttle/cruise driveability.
julio wrote:Looks like that intake mani/single throttle/ported heads combo works well. Holds torque much better than I would have thought for that boost.


Yeah i was happy with the powerband it holds torque great, and it dropped over 1lb of boost up top so it would have held a little better with some more boost tuning.

Torque seems kinda weak though compared to other graphs ive seen. but im happy with the results

chad b.
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Damn, I hear ya! Man, you made some good numbers! Good for you!

Darius
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Nice numbers!

RRRRB
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Went back to the dyno yesterday with a little bigger injectors, and made 797whp at 36psi!!

Yellow4g63
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Nice what size did you go too?

RRRRB
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i upgraded to a high flowing set of 1400's

So my 1200's are now for sale :)


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