SR20 overboosting problems
#1
SR20 overboosting problems
First I'll list my set up.
T25 Sr20 turbo 7 psi actuator with a 3 inch downpipe vband to a 2 foot pipe. Rx7 460 cc injectors, eBay bov, diypnp ms2.
Problem:
My car is overboosting way past 7 psi. My overboost settings in ms are set to 205kpa. I'm really kind of clueless to what's my problem and this set up has only been on my car for a week.
I'd appreciate any input from you guys thanks.
T25 Sr20 turbo 7 psi actuator with a 3 inch downpipe vband to a 2 foot pipe. Rx7 460 cc injectors, eBay bov, diypnp ms2.
Problem:
My car is overboosting way past 7 psi. My overboost settings in ms are set to 205kpa. I'm really kind of clueless to what's my problem and this set up has only been on my car for a week.
I'd appreciate any input from you guys thanks.
#6
Junior Member
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205 kpa = ~15 psi. That's your problem. In terms of overboost protection.
Do what he said. Port the wastegate. Also, make sure your wastegate flapper can open ALL THE WAY.
What downpipe do you have?
What downpipe do you have?
#9
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I bought a china turbo and even though the listing said the wastegate is rated at 7PSI, it wasn't opening until 10psi and probably fully opened around 13-15psi. You can disconnect the wastegate and do a quick check.
#11
He does't the overboosting problems get worse with the MBC in, that is why over boost was set for 14 we were shooting for 12. Spike and spool were WAY to fast with the MBC so it was removed to drill the breather bigger.
After the MBC was removed we were STILL seeing 14psi. The car can't be run WOT or over 4k, just hits overboost.
After the MBC was removed we were STILL seeing 14psi. The car can't be run WOT or over 4k, just hits overboost.
#20
mkturbo.com
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It can have to do with how wiggle room you give all the bolt holes. Just moving it slightly can make a difference. With mine I believe I just had to move it slightly to the left and it worked fine.