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Got Over 400kw Atw?

T04GTR

By T04GTR,
in Engines & Forced Induction

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colinhunt
colinhunt

Let's not turn yet another thread into a discussion about your car, please.

Lithium
Lithium
SiR_RB
SiR_RB

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Mark-32 Community Regular

Mark-32

Posted
Posted (edited)

Did a firmware upgrade on the vipec that solved the misfire problem i was having a few pages back.

Went back for another tune it made 486rwkw on e85. Engine is rb26, -5's running 26 psi

Can any tech heads tell me how to upload the dyno graph as its over 2mb ??

Edited by Mark-32
N1GTR Grand Master

N1GTR

Posted
Posted

I'll PM you my email and i'll do it for you if you aren't sure how to

Or, you can sign up with a hosting place like photobucket and host it there then use the IMG tags to embed into this thread

EDIT: Here they are

c7a59d33.jpg

473796fc.jpg

Mark-32 Community Regular

Mark-32

Posted
Posted (edited)

that is a huge number for -5's even on e85....

keen to know spec list too

I was suprised myself but I have dyno papers from when it was first run in on dyno on 14psi, then tuned on 21 psi on pump fuel, then now on E85.

All the dyno runs today were in 5th gear as 4th would just bag the tyres.

Spec list of what i can remember in no particular order is-

RWD Rb26 conversion in an r32gtst

r33 5 speed

hi octane 11 litre sump (rear head drain, nismo oil air seperator going into main catch can that drains to sump.)

1mm restrictor

2860 -5s

big trust intercooler (unsure of exact dimensions but its over 100mm thick and pretty huge)

exhaust is stainless split dumps into 3 inch y pipes into a 3.5 inch sidepipe no mufflers

cams are tomei 260 10.8mm lift??

nitto/je pistons

nitto I beam Rods

Arp stud kits throughout

balanced and blueprinted

nitto 1.2mm head gasket

vipec v44 ecu internal boost controlled

fuel system is 1v 044 lift pump

2x 044 external out of surge tank feeding hicas lines

greddy twin entry rail

aeromotive fuel reg

ID1000 injectors

post-71053-0-50326500-1340183038_thumb.jpg

Edited by Mark-32
R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Eyebrow's are raised by that result... Seems to be a bit on the generous side?!?

What would correction ratio be between AT 9deg and IT 21deg?

+1

With probably the strangest boost curve ever... And -5s hold 26psi @ 8000rpm without any drop off in torque!?!

This is certainly odd.

Mark-32 Community Regular

Mark-32

Posted
Posted

I assumed the figure was so high as its rwd only?

To begin with the boost was at 24psi but the boost curve flattened off aswel as the power curve around 6500rpm making consistant 430 odd rwkw.

The tuner asked if i was happy with that and I said i wanted to add a litte more boost at the end of the rev range to see if the power curve would continue upwards in the direction it was heading. He then snuck more boost into the engine up top and thats what happened.

Im stoked with it, haters are guna hate either way but it is what it is.

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Mark-32 Community Regular

Mark-32

Posted
Posted

The tuner said it was cylinder pressure that would kill the engine and it seemed as though it was struggling for spark as you can see from the dip in the power curve that looks like wheelspin after 5500.

The tuner had to adjust the boost controller in that way so it would run properly.

I have a crappy photo of the dyno screen from where he was adding more boost. It went 420 on 21ish then 460 odd on 24+ then made 486 up to 26psi

I just dont know how to upload it as its over 2mb. I can send it to someone if they can do it for me?

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