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26/30 R34 Gtr **now With Results**

mr34 gtr
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nick81xd Community Regular

nick81xd

Posted
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Car is still on pump fuel haha low boost 30psi would be asking for trouble. It didnt get near that sort of boost levels. Tim not interested in alternate fuels at this stage so going to hit a wall soon for safe power levels

TheGotoGuy Apprentice

TheGotoGuy

Posted
Posted (edited)

i said 3Bar in relation to fuel pressure (3 bar is 43.5psi) as when quoting injector flows you should always quote the fuel pressure, Sards are rated at 800cc @ 3Bar fuel Pressure, I assumed that the GTR was runnung 3Bar fuel pressure as that is the normal operating pressure. i do not not know what the boost was or what the power is. I estimated power using a BSFC figure of .6 which is also the norm for an RBs on pump. It is possible if the engine is running AFRs in the low 10s it could run out of injectors at lower power levels than i estimated or maybe it was on E85, i know Nick loves that shit....not. :)

Edited by TheGotoGuy
GTRNUR Grand Master

GTRNUR

Posted
Posted

There is a time and place to share results. And that time is when the owner is happy with the results.

A lot of time and effort goes into safely tuning a high power engine too. These are things not to be rushed, that is unless you happen to have endless bags of money to replace all the things you break along the way.

TheGotoGuy Apprentice

TheGotoGuy

Posted
Posted

Guess im just weird, i have no trouble sharing specs and details and results good or bad when they are available.

I am transparent when it comes to builds, i don't really understand why Tim wont let Nick post some figures. It makes what it makes regardless, if it performed as expected great, if not then sharing info will lead to rectifying any problems faster.

Thats my view.

nick81xd Community Regular

nick81xd

Posted
Posted

POWERPLAY STORYTIME.....

Friday morning the car was driven from Bundy to Brisbane (4 hours) for a decent alignment, tune and a powerplay thrashing. Car ran perfect whole way down.

Took the car into Accurate Supsension Services for it to be better setup for street/track. Reccommend them to anyone wanting a quality setup. Car handles so much better then before, tested it at QR threw it into a few corners at speed and stuck like glue, it used to have the tendency to go into understeer when quickly turned in. It also squirmed and walked under power and heavy braking. All that is now gone.

IMAG0227.jpg

Once that was done it was taken to Mark at Godzilla Motorsport for its long awaited tune. The plan was feed it as much boost until the fuel system wouldnt allow anymore. Early tuning resulted in some suprising figures on very low boost levels. Alot of attention was paid to cruise and transition from decel to accel tuning. Trying to make the car a nice car to drive not only just powerful.

The end result transformed the car, it can potter along in 5:30pm banked up highway traffic (as we found out) without a cough or hesitation. The fuel economy has improved largely too. Gotten 50klms so far more out of a tank along highway.

Trying to get ahold dyno sheet from Mark so can post up current power figure and delivery. Injector duty cycle started to get high (90+%) so Mark added some extra fuel pressure to compansate so a bit more. got a extra 40hp before 92% IDC was reached and stopped at that power and boost level....a bit short of the expected boost that was planned

Its not too bad off boost, ample enough power to cruise along road and climb hills without dropping down gears, like the old 2.7 required. Power comes on hard at 5400 and is suprisingly a flat linear curve all the way till 8500. Unsure of when power will drop off but we all agreed 8500 is enough to rev it at this stage.

BADSIDE is the big cam idle has dissappeared completely :( :( :(. Going to talk to Mark about getting that back. Sounds too cool to get rid off :).

POWERPLAY.

Woke up saturday morning to a car with only half a clutch pedal throw, a little bit of 530am hotel carpark spanner swinging got a full clutch back again. went to track and in process the clutch was giving dramas again. Checked it out in the staging lanes and found the clutch master cylinder had decided it was going to start leaking very slowly and bleed off. Was not going to get a cylider on weekend so just kept eye on fluid level and adjusted things as we went.

On track car performed faultless, Needed more power as always. won some races lost some too. all in fun.

Car made it back to bundy with only a small oil leak (suspected oil relocation adapter and the clutch master leaking) For its first proper outing its done awesome.

Tim is working out what to do with the car next, gearbox upgrade, fuel system, Ecu, but for now just going to drive it until feels slow again and the start chasing power

nomnomv8 Rising Star

nomnomv8

Posted
Posted

i said it before & i'll say it again - when i built my 26/30, i should have bolted a t51r on it (as advised by my tuner)

Cant go past the t51r proven and will always get the result, sounds so good on full boost too! What turbo did you end up going for??

This link is giving me serious headaches though, the want for this setup inside a street driven lightweight R32 GTR doing easy 10 second passes down the quater and then backing up on a circuit is so tempting!!

http://www.spoolimports.com/articles-1/rb34det-results

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