actuator problems - any ideas

[jonboy21t]

Ok here goes: I've had over boost problems when my anal valve is plugged in. I took the 21 to Slark Race Engineering on Monday to have the actuator set. We set it to 0.5 bar, plugged in the anal valve and all the power/boost came in between 4,000 & 5,500 rpm - not suitable for back lane caining!! Went back to Slark & set the actuator to 10psi turned up the bleed valve & am now running 14psi & all appears to be ok.

Does anyone have any ideas why: A. when the actuator was set at the correct pressure all the power came in so high up the rev range?
B. when the actuator was set @ 10psi the car pulled like a train from 2,500 rpm & C. When the anal valve was plugged in @ 10psi the car boosted of the guage & touched about 240bhp on the rolling road?

I know there's alot of questions in there but I need to find out what the f**k is happening to my car.

Also is it safe to set the actuator at 10psi & use the bleed valve to increase the boost to 13 - 15psi????

Thanks


jonno

 

[Tiny Tim]

Id say...

A) It wasnt set at what you hoped. Generally, 2 full turns on an actuator rod will equal 1 psi. - im guressing it was set to a lower psi
sounds pretty standard to me
C) Because it wasnt running 10psi, sounds like it was running silly boost.

Do you actually have an aftermarket boost gauge fitted?

 

[joff]

Well C is the easier one, 10 psi + another 7 ish psi (what the 'anal' valve adds) would give you a healthly increase in power, but it shouldnt be quite 240bh, more like 200 - 220 i'd say.

You can disconnect the amnal valve, and set your boost some other way, but it then removes the possibilty of the ecu dropping the boost for things like "limp home" mode

Joff

 

[jonboy21t]

Yes I do have an after market boost guage, without the bleed valve turned up it's boosting @ 10 psi. Then I turned the bleed valve to obtain 14psi.

Thanks

jonno

 

[Lee_R21Turbo]

Jon dude.....I take it you've tried a different anal valve??? :lol: :lol:

P.S. I aint forgotten about those bits...believe me I'm gonna sort it for you!!!

 

[jonboy21t]

Uh, no Lee I haven't . But I should do really, but they're over ?100 from Renault. If you've got an that works lying around, well you know my address

Cheers

jonno