Anonymous

Ok let me set the scene it is a rainy miserable November day, went and saw a poor hard done by, but in ok nick rs, took pity on it even though its in bits, bumper in the boot along with clutch remains of turbo, manifold and a full exhuast was found. So I am buying it not out of pity but the fact is I quite like it.


So here poses the question, I have found a good turbo and hopefully soon to secure its purchase (at the weekend). What I need to know is do i need to change the fuelling at all, if so what with?

Spec of car is, wait for it, patience, exhaust and filter.


Spec of the turbo is a stage 3 turbo, inc 0.48ar exh, 55 trim compressor wheel, 360 thrust bearing.

Now my thoughts were to leave boost standard but the current owner of the turbo says it will feel laggy, not to fussed about lag as i dont intend to drive it off boost . What are peoples veiws and opinions.

Do have plans or the car but am a tight arse so dont want to spend to much money to quickly But will do to ensure the car works properly. If I do up the boost what levels are safe on an rst?

Just a few questions to start!

Please dont critise my spelling I cant help being an ass!!

flashpoint

If you are using a stranded intercooler I would not take the boost any higher than 13pis (you will have to have it chipped to run this boost) to be safe as it is not the best in the world you can run more 14, 15, 16 psi and higher but change the intercooler first, it sounds as if you intend to drive it hard, so when you have its running get down to your local rolling road and get it sorted , money well spent.

Cheers

Steve

Anonymous

does anyone no a local rolling road in hampshire anywhere? apart from sas in aldershot, who i would rather not go to

Anonymous

oh and cheers for the reply flashpoint

JesseT

Chips don't do much in an ERST. They are mainly changed just to get rid of the boost limit. The price of the chip for the job it does is just stupid. It is the easy solution, but I would either just fool the ESC II unit to make it beleive the boost is lower, or then change the entire ignition system.
The standard intercooler is really small and running above 1 bar is pointless. After the first acceleration the best power is already gone because of intercooler heating. I can recommend the large GRS unit. Top quality product together with top quality service from Graham.

Anonymous

Iam sorry if iam hyjacking your post mate, if you rase the boost wont it cause the engine to run lean then "pink" thought that was why people chip RST`s not only to lose the boost limit but to richen the mixture to.

Go easy iam new to all this, pick up my S1 this saturday. (then restore it, lol)

JesseT

Could you care to explain to me in detail, how the chip would richen the mixture as the chip is in the silver ecu which only controls the boost and ignition?

Anonymous

Oh right sorry mate, thought the ecu contolled the mixture aswell like on most modern cars, how is the mixtre controled?

Mark2910

Im Going to Solent Race and Rally in OJ Industrial Est Portsmouth tomorrow to have my RST set up properly. Ł59 per hour your on the rollers.

Anonymous

Mark2910 let me know how you get on because if they sort yours fine seems, they be the closet at the moment. What you going in for!

Mark2910

I just wanna make sure everything is running how it should before i decide to take on anything serious. Once it's all ok, I'll do a power run and see how goes.

Mark2910

Anyone got a spare no. 4 piston, Just before we got going he did a leakage test on the cylinders. 1 - 2 - 3 were all spot on at 35% and 4 went Right up to 85% it's a loosing all the pressure down the side of the piston. Im hopeing it's not the block fucked. Gonna get the head whipped of Monday and see whats wrong inside.

Runs and idles nice now on 3 1/4 cylinders except the cloud of smoke behind me .

But i'll recommend Solent R&R to ya. there no is 023 92 678188 Cost me Ł60 and i was there 2 hours.

Mark

Rick

The RST has two ecu's one ignition, and one fuel. The ignition ecu contains a chip with an ignition cut for too much boost, and too much rpm. It has a map table for ignition advance vs rpm vs MAP, with +-50 deg adjustemnt potential.

The fuel ecu also has a higher rpm limiter. It's job is to vary the current to the EMFPR, depending on input from various sensors.

Rick

Oh, and u could have a knackered valve, not piston.

JesseT

Did you mean a EMFPR when you said EMFPR
I would agree with Rick on the valve thing. The exhaust valve would be the first bet. They sometimes can just crack when old and end up like this:
http://www.hut.fi/~jttuomi2/pakoventtiili.jpg
...or then they can just look like the letter "D".

Rick

you've lost me....

JesseT

Well I've apparently lost myself also... I was supposed to write EMFPA, as an Electro-Magnetic Fuel Pressure Actuator. I take it that you were referring to this.

Rick

it's an actuator and regulator