motherhupit

Hi just wondering is there anyway of reducing Turbo lag without changing the turbo,

I've Got a Fiesa RS Turbo Stage2 spec 195chip, beiges, T3 etc, apart from standard head and cam, and it seems to suffer from a lot of lag, i've been told the T3 looks to be a cossy one are these any bigger etc, the car flies on Boost but is just a real pain waiting for it all the time, saxo's beat me of the line since it either spins and its got a LSD or grips and has so much lag, turbo will reach full boost about 2600-2800 rpm and runs about 14psi, Cheers SEB,

pa_sjo

Don't confuse boost threshold with lag.. If your boost threshold is 2600 and above, then thats where you need to keep the revs above if you want power.. 'Lag' is the time it takes it to produces full boost from the time you open the throttle fully, when you're ABOVE the boost threshold..

If you want to lower the boost threshold without changing the turbocharger, the easiest way is probably to add a bit of nitrous to it. 25 shot or so.

motherhupit

Cheers didn't know that ok its not too bad then say 1-2secs 1st and 2nd 3secs in 3rd and 4 secs in 4th as a rough idea, but is a pain getting to full boost when cruising at say 2200rpm, etc, how much revs can these engines take without going wrong that much or wearing out etc, it had a full rebuild with 0.5m about 30k miles ago, and only does 6k rpm max, i don't really like reving them hard etc. Cheers

pa_sjo

To be honest I think you just need to learn a bit on how to drive turbocharged cars...

motherhupit

I've had the car for year and half now but yeah prob a bit off truth there i try to drive slower anyway to save fuel since its ecomony is shit i get 28mpg tops going steady. the tuner at woodford garage (who are a cossy specialists) who sets it up every year says its a bit laggy and my mot tester says it has lots of lag but then he drives a TT, but maybe its just gonna be like this due to the turbo etc.

pa_sjo

Perhaps you've got a fucked actuator, sticky/broken wastegate, trashed cam.. lots of things could make the situation worse.. you're best to take it to someone with considerable experience with these who will instantly be able to tell you if your given spec isn't performing as it should...

motherhupit

i have a dyno print out with the spec from 1997 lol showing 180hp and i asked the Tuner last time he done it and he guessed at the 180 mark so as a rough guide, it had a new ford cam in 2006 and has done about 30k on it, i've got a Boost valve (not a bleed Valve) to try and get ride of any wastegate creep that might be there, like you said thow i've never driven another RS so i wouldn't know how good or bad it is to be hoinst, and its my first turbo car aswell so don't really have anything to compair it to, my old MK3 1.6s seemed a lot quicker of the mark and upto 2500rpm, was just wondering if there was any other ways of doing it, but looks like i will just have to rev it more etc, Cheers for the help, also its running a Superchip a Blue one think its a SUPERCHIPS one what was fitted by Turbo Systems back int 1997 when it had most of the stage 2 tuning done but was only running a T2 then could it do with the Chip re-programing or a new one,

pa_sjo

Running a T3 on a car with a T2 chip - you're lucky you've not melted the engine

The power boost valve needs to go too.

You really, really need to take the car to a decent tuner who specialises in these.. MSD.. Grove.. etc. Noone too close to you though i'm afraid, but the trips are worth it.

motherhupit

Its a 195chip i though all these were mean't for T3's. But back in 1997 where they for T2's. I live 30mins from ALAN JEFFERIES, have you heard any good stuff about him, he does rolling road tuning for turbo cars, he said he might be able to re-program the chip, and he thinks my chip might not have stoich built in so thats whys its so shit on fuel

pa_sjo

Never heard of him.. There are only two places I would take a FRST on EEC management, and they are detailed in my previous post..

motherhupit

Okay i see MSD are based in blackpool where about are grove based and do they have a website does anyone know of a nearer place to devon etc, Cheers SEB

Stavros

by sounds of it there not much wrong with your car, running a fairly big turbo on a little 1.6, full boost under 3k is decent, and you cant expect to boot it at 2k in top and it fly.

hell, if you had a non turbo 2litre or similar and booted it at that revs itd not go anywhere either.

only cars that shift at no revs have small turbos or are big capacity.

pa_sjo

Stav, you don't think running the wrong chip is much wrong with the car?

Stavros

Not fuck all that will really affect spoolup, which is the question I answer.

Prob kill the engine top end, but he fannying around at low revs anyhow.

Mint FRST

iTrader: (1)

Put a T2 back on it! lol

Seriously they are a better drive.

Stavros

is the t2 manifold badly restrictive?

or does everyone just give up there and then and t3 it?

just there a lot of damn sight better turbos around for a rst with a t2 flange than the usual rst/cossie t3s that are fitted...

GavStyli

agreed!
or just fuck it and get nos