STI @ 21

Right was coming home from my girlfriends just now, and as you come off the M25 at junction 4 there is a nice long bit of dual carriageway all the way down. It was here on Saturday me and my brother had a side by side rolling start race, P1 vs STI8. The outcome was interesting, he managed to pull away, but I was changing up at around 6500 revs cause I didn't want to push to hard, whilst he was going on till just over 8000, also he was the one who said go. Anyway coming down the same bit tonight, and thought I would see how far I could push the STI 8, 3rd gear up to just under 8000, and then 4th just over 8000. No turbo lag at all, and felt beautifull. Anyway to get to the point, slowed down for the roundabout, went round, and then went off in 3rd up to 7500, were the car stuttered, but was then fine after when the same revs was reached in 4th. So whys it happened anything major, or just the turbo and engine not being use to hitting that hi. Sorry for the long message, but need to know as I am driving on the motorway tomorrow and I don't want anything to go wrong. Thanks for reading and any advice.

what would scooby do

How much fuel did you have in the tank at the time ?

STI @ 21

Around half maybe a bit under, wasn't empty.

Fizz

iTrader: (1)

air con on?

STI @ 21

Nop windows were open, as I wanted to have a listen, so radio was off, I think the only electrical thing on was the heated window.

Chris

Dan J

Yea that'd make sense! Cos it's very icy out there tonight it's a pain when the window ices up!

what would scooby do

You normally get problems on 1/4 tank and hammering round corners 1/2 tank not a problem... maybe just the heat recently ??

STI @ 21

No don't really know why I have the rear heated window on, rear window just seemed a bit misty. Just been talking to my brother on MSN, and he thinks it could be the rev limiter, boucying it, to stop it going to far. Resonable I think, but what get me is how it allowed me to push just over 8000 on one run, and then bounce at 7500 the next.

Dazza012

Heated rear window...on in this weather... Y ?

I retract that statement didnt refresh the board first sorry.

[Edited by Dazza012 - 7/14/2003 11:26:29 PM]

STI @ 21

Anyways I am off to bed got to be up early than usual at around 9 or so, will check the board then to see if anyone has come up with any definate cause or not. Chat to all soon.

Chris

what would scooby do

You may find that the rev counter is pants and mis-reads, I've heard on here of peeps using secs monitor which shows up different revs than the tacho does.. not sureof age/model of cars affected..

Dazza012

9 or so ??? early ....... bloody hell m8 days nearly over by then

what would scooby do

Daz.. bloody kids huh LOL

STI @ 21

the joys of student life, when I am at uni I am not usually up until gone ten, unless I have a 9 o'clock lecture. Nursing the hangovers. Anyway am definately off to be now, was just looking into some blue neons for my Silver STI8 would look awesome I think.

Chris

*Sonic*

is this triple figures ?

all on a private test track I assume

Brun

What is the rev limit supposed to be on the 8?

ROBO

My STi 7 never did anything like that. What mileage are you on now?
I wouldn`t be overly concerned unless you start getting repeat perfomances.

STI @ 21

I don't know what the rev limit is, the little red light setting, that tells you to change up gear only goes up as high as 7500. According to my bro, the P1 is limited to 8300, so I would have thought the STI8 would be around the same. Am on around 4000 miles, so it has been worn in, not overly concerned, just worried me a bit when it happened.

Leslie

I saw a post in a technical forum a short while ago which said that the rev counter can under read by up to 300 RPM.

Les

+Doc+

Suppose it could be a number of things.
Overboost protection? rev ltd? ****ty fuel (where do you fill up)?
A cars a car at the end of the day it wont be perfect all the time there are too many factors to take into consideration.
Doc

ROBO

If it only goes up to 7500 rpm then that`s time to change gear, nothing to be gained by squeezing those few exra revs out, just abusing it IMHO.
7 weeks until i pick up mine.

STI @ 21

I always use optimax so I don't think that would be a problem, will see how it goes today, and let you know. Cheers for the help.

Chris

V-techland

I was just gonna ask if you used Optimax!!!!!!!!!!

Its sh*t!!!!!!!!!!!!!!!!!! (Now i'm not trying to start another Optimax thread, so please don't flame me).

I've read too many threads on here that questions this fuel, so IMHO if alot of people keep querying it then there must be some thing amiss?

Friend had optimax in his STI V5 when the engine let go (at just 31K mile!) and under hard acceleration the car would stutter quite savagely

He religeously used Esso or BP SUL with no side effects (if anything the car ran better) up until the time he sold it. (post rebuild)

Two other good friends of mine are running UK spec MY00 cars, one standard and one modified, and they both adhere to the above statement.

Change the fuel you use, and IMO the problem will not reoccur!

How old was the Optimax in your tank?? The shelf life is only abut 1 week or so!!

NB: Optimax only seems to affect Scoobs badly, normally aspirated cars such as CTR's seem to have no problems??

*Sonic*

Optimax has been fine in my car uk MY00, and does perform slightly better than SUL, plus its cheaper by some considerable margin !

scooby_si

or to throw anopther theory in possibly fuel cut if yiou were over boosting i had this when it started getting more boost than ECU liked so did fuel cut Do you have a boost gauge?
Si

V-techland

Its not cheaper when coupled to a £4000 - £6000 engine rebuild Sonic!

But not looking for a flame, just MO