No Low End Power

[nizmokid]

Hi guys I have a R33 1.5 gtst

it has aultronic sm4

450hp garret turbo

walbro pump

555cc injectors

HKS cooler

3.5 inch exhaust

and all the other bits and pieces.

the car was road tuned good and safe, but didn't have much pick up in the lower rev range.

( can't spin the wheels in a standing start, just bogs down bad) top end is very smooth, not that throw you back in the seat which would be nice.

I am thinking I might need to take it to another tuner for a dyno tune and see if he can fix the problem.

can any one shed some light on this problem? before I book it into a dyno time.

[GTRNUR]

Sounds like a safe tune, not a responsive one. Too soft on the igniton advance makes a car unresponsive and makes the power delivery smooth rather than having it come on hard and fast. You cant fix this without booking more dyno time because ignition changes will affect your AFR's as well, as the fuel will be being burnt properly and it will be once a little more ignition is added.

You need to find someone thats skilled with the autronic as well as knows the rb25 really well.

[RB30-POWER]

yeah, might be best to get a tuner, familiar with the ecu and engine to tune each load point to best torque.

dyno will make it easy to see the output figures.

most likely should budget a few hours.

[nizmokid]

will book it in this week for a dyno tune ..... cheers!

[darren lewis]

will book it in this week for a dyno tune ..... cheers!

welcome to the world of the 2.5 litre turbo charged engine.