Recent content by garagestmarien

Okay, The BOV doesn't have any effect on the mixture for injection, perhaps it does on carb's but I've never had anything to do with them. On the injection, the fuel is calculated before the turbo and only on the amount of air entering. On mine using a recirculating BOV (factory Bosch) and a...

Don't want to cause an argument here but I'm afraid your wrong Sleeper. BOV's or dump valves whether recirculating or to atmosphere are there to protect the turbo. Without one, when you close the throttle there is nowhere for the gas to go, but the turbo is still spinning and trying to...

Correct, that is the F40. John

I agree that after market BOV'S make noise, but like on my engine CX25 GTi Turbo2, the factory recirculating type caused disrupted airflow to the intake. The standard airflow meter is Bosch with the flapper door and when testing the standard dump valve, you could actually see the door being...

OOPS! Sorry, this is my post. So another question. Wrapping the exhaust manifold and turbo (exhaust side) to keep the heat up and therefore allow the exhaust gas to go faster. Is there any noticable gain doing this. There are kits on the market and quite expensive at that. Any ideas John

Hi I've already got another post on this subject. But a few comments they may help. (I am commenting on an external wastegate) On my set up, the wastegate pipe goes into the exhaust just after the turbo and at right angles. Now to me, the wastegate is pushing in pressurized exhaust pulses into...

Thinking more on the subject. I don't think silencing for the main exhaust is really needed, because the turbine wheel is braking the exhaust pulse up, but when the wastegate opens, then pulsed exhaust is going down the pipe also. So I think a straight through system for the turbo is okay, to...

I remember when formula 1 had turbos and to equal the power to the others, the engines were half the size. 1500cc turbo, 3000cc normally aspirated.

I think the silencer could be kept small, if it was a baffle type, rather than a straight through. Perhaps, also a couple of bends along the pipe to break the noise.

Hi, Hopefully this question / comment will be good for discussion. I have read that a screamer pipe on a turbo is a good way to go in squeezing out some extra horses. But because of the sheer noise, the conversion wouldn't work on the street. So, my idea...

Hi, Can anyone help. I am just rebuilding a ford escort 1.6 16v 90hp engine. On fitting the cam belt, it seems quite loose from the crank to the exhaust cam. My Autodata details show the crank pulley lined up with a raised pointer in the sump. If I check no1 cylinder, this is not at TDC, the...

Can anybody help me in finding a circuit diagram for a Bosch ECU 0280 000 352. This is from a Citroen CX25 GTI Turbo 2 (1986). Or does anybody know any sites that specialise inECU hacking etc. Many thanks John