Help: R33 Tune Problems

[EVL-R33]

Ok, so I got my R33 RB25DET back from the tuner with a new turbo installation with the following:

Mods:

Garrett 3037 turbo

Top mount manifold

SARD 550cc Injectors

Bosch 023 Fuel Pump

Plazmaman intake plenum

FMIC

Profec B Spec II BC

PFC

and more supporting mods...

Although they done a good job with the turbo/piping installation, the tune im not too happy with and need some advice on.

Problems: When my car is cold, the revs surge from around 1300 to 1800rpm (this goes away when the car warms up), the tuner said he had no idea why this is happening and mentioned that the PFC doesnt have a cold start tuning option (if this makes any sense)?

The other thing he said was at high revs it knocked too much, so he reduced the timing right down to around 15deg IGN timing and now its very sluggish. He said that getting a high flow cat might fix this problem?

Anyone had any similar problems?

Cheers.

PS. I just checked the Injector latencies on PaulR33s PFC docs, and im not sure if the tuner set mine correctly, they read 70% and -1.30ms, souldnt they be 67% and +0.052 for SARD 550cc in RB25DET?

Edited April 16, 2009 by EVL-R33

[Guilt-Toy]

where are you located mate? PM me who tuned the car please

[R31Nismoid]

Sounds like a shit tuner to me for one thing

The fact they state a PFC doesnt have a tuneable cold start is pathetic - you can do it via datalogit.

Either way, it wont be related to cold start on the actual ECU.

It'll be a leaky VAC hose somewhere, or a stuffed O2 sensor. Likely the first option

What exhaust do you have now? If you have a 3037 and do not have a serious flowing CAT - then it begs the question of what other mods are lacking as well.

Double edge sword here i think.

1. Average tuner

2. Average parts/setup by the owner

Both equating to an average setup.

[femno]

He probably didnt do the stable idle procedure either.

You can put in temp correction through the hand controller from memory, so no excuses for that.

It was knocking so he reduced IGN to 15. Overall at the cas or in the map? Sounds like he just moved the cas, as removing timing from up top shouldnt make it sluggish.

What cat do you have?

[EVL-R33]

Hey guys thanks for the replies.

I have a stock cat, and he actually though that might be one of the reasons for the knocking, he did ask me to get a highflow and take it back for a re-tune at no extra cost.

R31Nismoid, I got a 38mm external gate setup (Tial gate) and the 3037 has a 0.63rear avo rear housing, and I'm hoping that the cat is the problem behind the knocking, but as for the cold start, I'm hoping he will give it another go and fix that problem too.

The other thing I just remembered is that I dont have an oil catch can, they plumed it back, would this cause any knocking?

It probably wont show much but I added a pic below of the setup.

[SDEWY5]

setup looks cool!

[paulr33]

if it needs 15deg on max load to stop pining some may be wrong

ie cas is off set, base timing is whack, cam gear is whack and so on

check the basics with a timing light

this is a must for anyworkshop

do a base dyno run

check timing

THEN tune and adjust away