R34 Gt-t Manual Vs Auto With Manual Converison

[2dabass]

hey guys just see what you guys think of this

my cousin has a r34 gt-t manual ( stock ) other then a pod filter and cat back

and one of my mates just bought one with a exaust, pod and been boosted to 10psi

but it was a auto and now converted to a manaul but its a shit load slower!!!! even though its running more boost..

how is this possibal are the auto's de tunned?

any feed back is good feed back

[syfon]

Yes it's me, and yes that R34 is slow haha.

I just can't wait till I get a turbo-back exhaust fitted and the engine/turbo should rev quicker and be much more responsive.

But yes, i would also like to know what other people think. Are the automatic R34 GT-T Skyline's de-tuned from factory just like the automatic S15 200sx/Silvia's are?

Cheers for any help

[2dabass]

arnt you at work?

[syfon]

Yep, I sure am.

[wudi]

De-tuned? No

The Auto has a different ratio diff to the manual, That would play a part. Also engine condition, service history, type of fuel being used, condition of fuel pump etc etc

[2dabass]

De-tuned? No

The Auto has a different ratio diff to the manual, That would play a part. Also engine condition, service history, type of fuel being used, condition of fuel pump etc etc

but to play a big enough part that the one that had the conversion was running a singel stage boost controler and significantly slower?

[syfon]

Jace, I honestly reckon it is due to my car having the standard exhaust. Once I get the turbo-back exhaust, power fc, electronic boost controller and a tune i should be looking around the 270-280rwhp mark.

[J_R32]

someone correct me if im wrong, but manuals and autos have different ecu's....so if you have an auto ecu, that could also play a part.

[syfon]

I'm pretty sure my car has the manual ecu...

[ZXY]

Jace, I honestly reckon it is due to my car having the standard exhaust. Once I get the turbo-back exhaust, power fc, electronic boost controller and a tune i should be looking around the 270-280rwhp mark.

you wont get 270-280 with just those mods. The stock R34 turbo wont boost about 13psi with 14 maxing its efficiency range. I saw about 250rwhp with all those mods. I have a full turbo back apexi 80mm dump with 100mm exhaust.

Edited June 16, 2010 by ZXY

[Neuroglider]

i thought 34gtt turbo's could do 12max?

[bubba]

It's NOT boost dependant, it is airflow dependant..

What I have noticed is that the factory ECU's seemed to get less tolerant as the years went on.

[itsme]

Hrrm.. Maybe you just got a 34 in bad condition or something wrong with it? Mines an auto converted to manual and its perfectly fine.. havent done heaps to it, pod, zorst from the turbo back, lightened flywheel an hd clutch.. Nothing special and its got a good boot to it running stock boost.

Have you had it serviced? does it do anything odd? ie: idle funny, backfire etc??

Hope you work out what it is mate, maybe its been boosted and not tuned so afr are rooted?

Good luck buddy hope you work out what it is.

Also - be warned that if you need to upgrade the clutch (like i just have) the japs usually convert with an r33 gearbox so you would need a different clutch to a 34 clutch (one is pulltype and the other is push type).

Could cause you some drama if you get the wrong one first because I've been told its not easy to determine until you drop the gearbox out.

-Steve

Edited June 16, 2010 by itsme

[syfon]

Nah nothing funny about it.

I need to service it (plugs, oil, filters, throttle body clea, etc) but nothing unusual.

I know i can get close to 280rwhp with the usual mods (Z32afm, boost controller, exhaust, intake, fmic, computer, tuned correctly), as my old skyline was making 265rwhp with those mods

[syfon]

Yeah it does backfire, only because I unbolted the cat from the rest of the exhaust and have been driving around like that (i got bored of a dead quiet exhaust and did this till i get my proper exhaust haha)

[syfon]

Yeah it does backfire, only because I unbolted the cat from the rest of the exhaust and have been driving around like that (i got bored of a dead quiet exhaust and did this till i get my proper exhaust haha)