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Posted

I think you are wrong mate, an escort rs turbo pushes out 132 bhp as standard and the fiesta turbo pushes out 133 bhp as standard (cos the fiesta uses a different ECU system). And the fiesta has NO limited slip diff either.........

 

The dump valve is not needed unless a large amount of boost pressure is used.

Posted

the series 2 pushes out 133 bhp standard and the series 1 pushes 132 for some reason, as for the dump valve , well it doesnt give you anymore power! a dump valve works like this:

 

the turbo unti has 2 sets of blades, one on the exhaust side of the unitwhich spins up with the exhaust pressure, and another which is spun by the other set to create the pressure needed to get more air into the cylinders.

when you take your foot off the throttle the turbo's outlet is shut, meaning that the pressure has no-where to go, but being as the exhaust blades are still spinning pressure is still building up. without anywhere to go the build upwill damage the turbo's blades which is where the dump valve comes in to vent the excess air and release the pressure !

 

bit boring and technical but hope it helps!

Posted
the series 2 pushes out 133 bhp standard and the series 1 pushes 132 for some reason, as for the dump valve , well it doesnt give you anymore power! a dump valve works like this:

 

the turbo unti has 2 sets of blades, one on the exhaust side of the unitwhich spins up with the exhaust pressure, and another which is spun by the other set to create the pressure needed to get more air into the cylinders.

when you take your foot off the throttle the turbo's outlet is shut, meaning that the pressure has no-where to go, but being as the exhaust blades are still spinning pressure is still building up. without anywhere to go the build upwill damage the turbo's blades which is where the dump valve comes in to vent the excess air and release the pressure !

 

bit boring and technical but hope it helps!

that's what i was gonna post....

 

even got last months issue of fast ford out to check the figures..

 

:thumb:

Posted

nice bit of techy stuff there :thumb: I've been tuning my RS's for 9 years 8o 8o that makes me old. In a nut shell it's to stop the turbo stalling/slowing down. But unless your running 400bhp+ it wont help on a cossie and as for the RST, it just sounds cool, alot of reports have stated that a D/V on an RST has slown down the performance :( Had a d/v on my FRST 1.8 Interpro conversion and it made no difference, same with the Baileys one on my cossie, which is very loud :D

 

Overboost, well the ECU has a boost limiter pre 1990 will boost to about 8psi post 1990 10.5psi, a chip takes out the boostlimiter or raise's it.

My S1 was running ahmed bayjoo stage 1 chip with a boost limit of 17psi although it only run 15psi

 

:cheers:

Posted

Heero - the williams has 150bhp as standard yes, there isnt much diff about the 16v and the williams.....as the williams was based on the 16v. all thats diff engine wise is has a 2ltr lump, kickin out about 13+ bhp and has a higher top end speed.

 

same 0-60 according to the books, but obviously alot of it is down to driver.

 

also because of the 2ltr the willy has alot more touque at lower rev's which is where the 16v struggles.

 

Cheers, Marc.

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