Not your average compressor surge issue.

[firebirdvert305]

I hope canadiantsi and oldman read this. Well let me start off by saying I run an SC61 .63a/r hotside, its a 2.0L stock 7:8:1 engine. I used to run 33psi on the stock 2g mas (unhacked) tuning with dsmlink, we started to lose airflow counts uptop in the rpm range (too much airflow for 2g mas, I was seeing 56lbs min... in some logs). The car hasnt ever surged once, with the 2g mas + FP 4" intake pipe + K&N filter. Now onto my quest for running more boost, we decided to goto a maf-t setup. With that being said, its now being ran in blow-though, with a K&N filter directly over the S compressor cover. Now since ive got the maf-t setup on the car, its surging real bad at 4700-4900 (transition from 20psi to 30psi).

Things you might want to know: has jmf race intake manifold, has 272/272 cams, greddy type S bov, tial 38mm w/.7bar spring, running devilsown meth injection post maf.

Couple of questions id like answered : Was the 2g mas + FP intake pipe that big of a restriciton to not cause comp surge? Do you think a ported surge cover will alliviate this problem? Should I stop being a b!tch and just throw on the .82 hotside and deal w/the extra lag in hopes of curing the surge?

 

[CanadianTSi]

Was the 2g mas + FP intake pipe that big of a restriciton to not cause comp surge?

Yes, freeing up the Intake allowed it to spool that little bit faster so now its over the Surge Line.

You seem to already know the solutions to your problem. In my particular setup the Surge Ported Cover doesn't stop my Turbo from surging, but I guess its up to you.

 

[firebirdvert305]

Tyler what size hotside are you running .63? Have you ever solved your problem w/surge?

 

[CanadianTSi]

I'm running a Mitsu Hotside, hence why it surges so bad.