Will I Need A Tune

[napower]

hey guys and gals

quick question.

will my r34gtt need a tune if i up the boost 3-4 pounds from stock?

they already run a bit rich anyway stock, would that come into the equation of not needin a tune or am i a dummy?

cheeeeeeers

[DVS JEZ]

best to get it checked on the dyno to make sure your AFR's are ok which also checks the fuel system.

But at the least have supporting mods like cooler and free flowing exhaust including a decent cat.The stock turbo is risky but its a bit of a lucky dip whether it will last or not, some people go for years with the stock turbo on 16psi and some pop them at a little lower boost after a couple of months etc

[StealthX]

Hey bro, nah usually the stock ECU can handle an extra few pounds, the stock turbo wont like much more than 12psi, the ceramic turbine wheel doesn't enjoy it, and it'l fail on you for sure.

The thing you have to watch out for is Rich and retard. It's a safety feature built into the stock ECU. Basically in a nutshell, when the ECU reads more than a certain amount of airflow, it dumps in heaps of fuel and retards the timing heaps, to save the motor from detonation. It feels like a massive brick wall, you'll feel the car die in the ass untill the ECU reads less than that magic amount of air flow. Sometimes it happens at 10psi, sometimes at 14, it varies.

turn the boost up to 12psi, and make sure you have an upgraded dump/exhaust and an intercooler is a must above 10psi if you wish to make good powar.

good luck bro!

[napower]

Ah yeah had a thought i couldnt escape a dyno. I have a decent kakimoto catback, (thinkin of guttin my cat, undecided), hks sucker with cai, and a new dump,cooler and bov are on the way. should be sufficient

as for the chance of the turbo poppin ill take my chances.just replace it with a better one if it fooks up.

[Rolls]

even if it does run fine it will make way more power, better fuel economy and be nicer to drive with a tune.

[75coupe]

how much really can the car be tuned without an aftermarket ECU anyways.... what timing adjustment...???

[DVS JEZ]

how much really can the car be tuned without an aftermarket ECU anyways.... what timing adjustment...???

yep, its not so much in need of a tune just a check up to ensure the AFR's is safe, for the sake of $80ish for 3 power runs to check it.

[Rolls]

how much really can the car be tuned without an aftermarket ECU anyways.... what timing adjustment...???

If you get a nistune lots, uses the stock ECU with a chip that gives it almost as much functionality as an aftermarket ECU, highly recommended.

yep, its not so much in need of a tune just a check up to ensure the AFR's is safe, for the sake of $80ish for 3 power runs to check it.

If it is stock unless he has a failing fuel pump I can guarantee it will be too rich, upping the boost will probably not increase the power due to it upping the fuel map.

Edited June 12, 2011 by Rolls