Sr20 over boosting help appreciated :)
Sr20 over boosting help appreciated :)
alright the mbc is connected properly line on the bottom of the controller to the turbo housing and the side to the side port on my tail 38 mm waste gate......but the car still over boosts..... is the mbc bad ???? is my waste gate saying open and not closing ??? i should add that its boosting well beyond 25psi and it should only be boosting at around 16-18pi.......please any help is appreciated
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Beems240sx
- Posts: 457
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Re: Sr20 over boosting help appreciated :)
take the manual boost controller out of the equation. run the vacuum line straight to the waste gate and see if you are boosting at the spring rate in the tial waste gate. then tell us what happens
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s13drifter88
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1989 SOHC S13 Buzz Car - Location: Huntsville, AL
Re: Sr20 over boosting help appreciated :)
are u sure u got the right spring in ur wastegate. my old roommate had this same prob on his old civic. ordered a tial 38mm and it came with a 14psi spring when he wanted an 8psi spring.
Re: Sr20 over boosting help appreciated :)
ok well i couldnt drive it cause im redoing some stuff but i pulled the wastegate and its got a red spring (website for tial said its for 11.603 but its still boosting over 20
Re: Sr20 over boosting help appreciated :)
nevermind starch that now its only going to 11or 12 psi no pass and making a weird sound after 4 grand when the turbo spooling hard
Re: Sr20 over boosting help appreciated :)
Are you sure everything is tight? Might sound stupid but i overlooked this once and didnt tighten the compressor side elbow and it made a strange squeeling sound when spooling.06mustang wrote:nevermind starch that now its only going to 11or 12 psi no pass and making a weird sound after 4 grand when the turbo spooling hard
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PyR0NiAk
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Re: Sr20 over boosting help appreciated :)
I have to agree with taking the mbc out of the equation.. see what happens then. Your gauge may also be bad.. the squeeling noise is definitely not good, and like was said above, you need to check and make sure everything is snug.
Re: Sr20 over boosting help appreciated :)
ill double check and triple check and take it for a drive tom cause its raining 
but ill see tomm thanks for the suggestions
but ill see tomm thanks for the suggestionsRe: Sr20 over boosting help appreciated :)
Thats what we...er some of us are here for. Let us know how it goes.06mustang wrote:ill double check and triple check and take it for a drive tom cause its raining
Re: Sr20 over boosting help appreciated :)
Does the wastegate even open? Are you sure the MBC isn't backwards?