Does New Turbos = Re-Tune?

[91BNR32]

Hi guys To cut the story short, I got told the R32 GTR I bought had Nismo turbo's, so had some work done thinking they were steel wheel turbo's.

Had a bit of work done at the shop.. Power FC, boost controller, cam gears, injectors, pump, 302 awkw @ 19psi. 2 weeks later.. Big Bang under boost... white smoke etc... and I found out they ended up being the stock r32 gtr ceramic ones. :\ Not happy as you can imagine...

Just had some brand new 2860 -5's Garrett's fitted up over the last week $, and was wondering does it need to be completely re-mapped again? or just a quick re-map on the dyno. Or Is it safe to even drive or give it some stick? Appreciate your advice. Cheers

Edited May 7, 2012 by 91BNR32

[Piggaz]

It will most definately need to be looked at.

[vorse]

seconded

[91BNR32]

Right, well that clears that up lol.

Is it fine to just plod around in it though until I can get it booked in?

[LANDSCRIBBLE]

I would use 1/4-1/2 throttle, and keep revs under 4000 to be on the safe side, until it gets a retune

[R31Nismoid]

Even less RPM really, 3000rpm more than enough, light throttle should be ok to put around - but thats it. put around.

[joeyjoejoejuniorshabadoo]

i'd baby it to the tuners at most

[Dose Pipe Sutututu]

Of course, as the amount of air ingested will change drastically across the rev range not to mention there would be less exhaust restriction to dial in more timing.

In saying that, safe to drive provided you don't hit +ve manifold pressure.

[GTSBoy]

Yeah, as above. You could drive it at high revs so long as it wasn't making boost. The old tune should be equally valid at just about any revs that it was tuned at with little load. Just be gentle.

[91BNR32]

.7 bar is the lowest out of the 4 boost settings on the controller that the tuners set up. Sounds like I'll just put it on that and baby it back to them.

Still have standard AFMs so prob make still around the 300ish. But if I get some z32/nismos I've read up these -5s can do 340+ awkw? 19-20psi would be the most I'd run 

 

[Hadouken]

so you got yourself some -5's when you could have gone for -9's, judging by the power you want from it...

Also I am utterly astonished that it did not take your engine with it!

[Don Dada]

302awkw @ 19psi....Not bad at all.

Got a dyno sheet?

[Moodles2]

-5's will make about 370-400kw at 19-20psi.. sounds like you got the wrong turbos, -9's is what you really probably wanted.

[N1GTR]

^^^On a built engine, with all the rest of the car up to scratch yes, if they're bolted onto an otherwise pretty stock GTR (so excluding exhaust, ecu, pod filters) they'll give a crap result compared to the guys with all the right parts and the same turbos

[DVS JEZ]

^^^On a built engine, with all the rest of the car up to scratch yes, if they're bolted onto an otherwise pretty stock GTR (so excluding exhaust, ecu, pod filters) they'll give a crap result compared to the guys with all the right parts and the same turbos

Agreed. For some reason everyone latelythinks -5's will give them 380 + kw on a stockish 2.6L. Have a look through the dyno results thread, there are very few that have done this. Most are around 350 and under, and thats with cams etc

On topic though yes you will need a tune

[91BNR32]

yea I thought about the -9's for that little more response, but selling the car soon, and the workshop already had these on the shelf. Im sure I will still be happy with the -5's as it will be a improvement over the stock ceramics. Still can't believe I ran 20psi through them.. was lucky they only let go and not back through the motor..

Motor was fully rebuilt 3000km ago. Built to N1 spec, N1 pistons, oil pump, etc etc. so by all means no fully forged motor.. Still okay for 20psi though.

[DVS JEZ]

As much as i dont want to say this u cant be certain no ceramic dust has gone back through the motor but u may be lucky.

Xcalaba has run big boost on stock ceramic turbo's for a long time. No one is sure how- i think he is using witch magic

[Hadouken]

Black magic!!!

[91BNR32]

As much as i dont want to say this u cant be certain no ceramic dust has gone back through the motor but u may be lucky. Xcalaba has run big boost on stock ceramic turbo's for a long time. No one is sure how- i think he is using witch magic

I hope im lucky.. thats the last thing I need... The car still idled and drove completely fine when not putting it under boost after it let go.

Car Has no Cat on it, and I was giving it boot when it went bang. So im hoping it just blew out the back. (the rear turbo exhaust wheel went.) For piece of mind I will do a compression test to just be sure.

Edited May 7, 2012 by 91BNR32

[Hadouken]

Do comp test and report back.