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Crd Dyno Tuning Of My R32 Gt-r.... My 0.02c!

williamsf1

By williamsf1,
in New South Wales

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williamsf1 Mentor

williamsf1

Posted
Posted (edited)

first of all I would like to say this post, and further posts are not designed to create the "workshop X are fantastic and workshop Y and a bunch of KrUn....zzzz" you know the rest, it has been done before!

For those that do not know my car this is a very brief history of the build and who has helped along the way...

R32 GT-R build 11/92 first rego 93

fresh rebuilt RB26DETT from DART automotive 3000km ago

engine:-

tomei poncam 260 260 9.15 cams

tomei sump baffles

OS cam gears

rebuilt with new internals to DART spec (ask Jim :) )

TRUST extended split dumps

HKS GT-SS turbos

TRUST FMIC

baffled cam covers

APEXi FC

BLITZ SBC spec R

3.5 inch exhaust HKS rear box

splitfire coils

iri-top plugs

700cc SARD injectors

044 in tank

SARD fuel reg

remote filter and oil cooler.... now holding about 7.5 ltrs of oil...

57mm PWR radiator

power steering cooler

HICAS removed

and it goes on...

drive line is stock apart from the Jim Berry clutch, redline fliuds in the Gbox and diff, and transmaxZ in the ATTESSA with Castrol R 10/60 for the engine

fuel is BP ultimate 98

I think that covers the power making side, there is quite a bit done to make it stop, and turn, but that can wait till I have the urge to add all that!!

I would like to thank Jim from CRD for spending the entire day today (rocked up at 0730 and walked out at 1700!) fiddling with, and bringing out nearly 100AWKW from what was essentially a great driving car in the first place!!!

basically the work done today was trial and error with ignition timing and also cam timing, however there were 4 signifigant points I should add....

1) it was found, and shown to me that the CAS (crank angle sensor) was on the way out as we couldnt get the factory 20....replaced

2) throttle was found to be opening only 85% as the nut had spun back... we now have 100% when needed

3) semi slick tyres when hot have a nett loss on the Dyno of about 10-20 AWKW!

4) Cam dialing in is worth the fuss! no question.....

Basically the people that did the hard work are BEL garage who tirelessly fitted and fettled the car, slowly getting it to the point were it will live with all this power! and DART for building such a smooth and strong engine, and adding the turbos, cams and pipes to the mix...

Jim just took it to the next level, and I am honestly stunned to how big a gain he has got!

basically I could go on, and will if asked for the details, however the numbers should speak volumes...

the pictures below have :-

1) HKS factory output on a "built" slightly oversize engine with power at the flywheel

2) dynolog dyno power run at DART with a very drivable road tune + dyno top up from BEL making 205AWKW 1.43 BAR boost and 585NM

3) CRD dyno finally 313AWKW 1.36 BAR max dropping to 1.22 BAR at peak power

thanks to all ;):):)

I will try to get a back to back run on DART's new state of the art dyno 2moro! so stay tuned....

hkspower_curve.bmp

post-16093-1126778850.jpg

post-16093-1126778882.jpg

Edited by williamsf1
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williamsf1 Mentor

williamsf1

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I truely doubt that I will run the car on the strip.... but never say never.... the car was built to go fast around corners (as nissan designed it) and you will see me at every race track I can take it to ;) that is a promise!!!

I hope to see all the Vic boys at a PI day sometime later in the year!!!

Mik Experienced

Mik

Posted
Posted
Doesn't anyone else think that 205AWKW is VERY low for an engine with all that gear recieving 1.45 BAR? Yet this was tuned by BEL, one of the top tuners?

Or am I just being silly?

Another GTR made 280awkw on the same dyno and trapped 125mph at the drags...so go figure.

Also, a wrx made a bit over 200 on the same dyno and made just under 300kw on a dyno dynamics.

It's all relative really.

williamsf1 Mentor

williamsf1

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Posted (edited)

Paul as I have stated above, the BEL tune and power run you see is on a dynolog dyno, so unless you have been on one it is just a number, not relative to anything else....

I have to say honestly that the BEL tune drove like a scun cat, and all who have been in the car would agree! but CRD did get more, with less boost using cam timing etc...

2moro will give a true like for like with another run on DART's dynolog...

anytime you want to take your car to DART's dyno to see for yourself I am sure you would be most welcome...

they are at Belmore Rd Punchbowl....

cheers....

oh and well said Mik :)

edit :- coz pauly asked nicely to remove the quoted rash statement :) or maybe it was stace :S :);)

Edited by williamsf1
wreckedhead Mentor

wreckedhead

Posted
Posted
Doesn't anyone else think that 205AWKW is VERY low for an engine with all that gear recieving 1.45 BAR? Yet this was tuned by BEL, one of the top tuners?

Or am I just being silly?

your just being silly.

Mik Experienced

Mik

Posted
Posted
would love to have seen BEL log the air/fuel ratio's this would have been a better indication of the quality of their tune.

Did you notice the straight line on Croydon's....a hallmark of Jim's work!

What does a straight AFR curve have to do with the quality of a tune? Getting a dead straight curve isn't exactly that difficult (or important for that matter).

One thing I noticed is that it seems damn lean. I wonder why Jim choose to tune so lean...he must have his reasons. Did he say anything about it Ben?

Duncan Grand Master

Duncan

Posted
Posted

Its the same target AFR as in Wreckedhead's dyno which I guess answers my question from the thread that was locked....Jim must be happy with 12.5 AFRs for a road car.

They have plenty of experience tuning, and there's no way I can argue....I'm just surprised they aim so lean?

Mik Experienced

Mik

Posted
Posted
Are we not looking at a built GTR engine....12.4 is on the money....take your cars back to Japan if you want overly rich power sapping mixtures. We have followed Jim's instructions and allowed him to guide us on the correct direction to follow. He must be right, as we have tortured our car for more than 2 years and its still producing world leading power/performance for our combination.

Yeah...what would the japs know...pack of dummies they are

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