RSM Supercharger on a 3400/3500 hybrid? UPDATE 6/18/13

[Slinky]

Feeling lazy now that everythings together, Who wantsta swap my springs

[Z26_T]

What can I say.. I'd rather high ball you than low ball you and offend you . I was thinking you were already cammed so my thoughts were in the 280 range.

I'm pretty jealous. I think the pre-maf systems look cleaner, and GM probably uses them for a reason on their boosted systems.

Do you have any knock retard issues? I've heard of issues caused by the supercharger whine. I also have some pretty severe false KR issues on my car that I need to address.

[Slinky]

I have not seen any knock really Jon gave me a pretty good tune throughout, But we just got into the maf tune and I haven't really gone wide-open throttle a lot..

[3X00-Modified]

Z26_T, what do you mean by "pre maf" systems? Most of the terms used are blow through or suck through... His is a suck through just like my legacy so that has a BOV, with a recirc tube back to the intake pre turbo but post MAF.

[Z26_T]

Pre maf is a 60*v6 term I suppose then. It's just the lazy way of talking about the location of the MAF. Pre-turbo/SC or post-turbo/sc. Pre MAF are suck, Post MAF are blow. The 2.0L turbo and 1.4L turbo GM engines use the suck system like your subi.

[Slinky]

Does anyone know what the torque specs are for 3500 rockers? Guess im changin the springs saturday since its gunna be 65degrees

[3X00-Modified]

Pre maf is a 60*v6 term I suppose then. It's just the lazy way of talking about the location of the MAF. Pre-turbo/SC or post-turbo/sc. Pre MAF are suck, Post MAF are blow. The 2.0L turbo and 1.4L turbo GM engines use the suck system like your subi.

Well yeah that's how its setup. Most of the factory systems are like that because of two reasons... one most of the SC's have internal bypass valves, and have too short of a intake tube run from the SC to the TB to allow a MAF to work properly (same issue Tyler had), and on turbo setups the BOV needs to be recirculated to prevent unwanted noise and the only way to do that is once again have a long intake track, or have a recirc system with the maf pre turbo to prevent any issues.

I haven't see too many people run blow through setups on boosted cars... it may also present more issues with tuning too.

[Z26_T]

I haven't see too many people run blow through setups on boosted cars... it may also present more issues with tuning too.

Honestly this is the first aftermarket boosted obd2 system ive seen on the forums that doesnt use a blow through maf. A couple individuals on 60* started with suck then went to blow through. I guess we just like the sound of the bov? But I would wonder if i could tune my system better with a suck maf and a 50/50 bov. You use a 50/50 on your subi right?

Sorry for jacking your thread . If you still need the rocker specs i can look them up tomorrow. What year are your heads?

[Slinky]

I did like the sound of my bypass but id rather have drivability as opposed to asthetics at this point, maybe someday ill route it differant but i doubt it, everythings just so tight with that aftercooler in there, just fits perfect. And on top of that my bypass is not a bov so its only open until -6hg i believe than its closed, i could never really hear it when my car shifted bc its an auto... And their 06' 3500 heads i believe

[3X00-Modified]

I haven't see too many people run blow through setups on boosted cars... it may also present more issues with tuning too.

Honestly this is the first aftermarket boosted obd2 system ive seen on the forums that doesnt use a blow through maf. A couple individuals on 60* started with suck then went to blow through. I guess we just like the sound of the bov? But I would wonder if i could tune my system better with a suck maf and a 50/50 bov. You use a 50/50 on your subi right?

Sorry for jacking your thread . If you still need the rocker specs i can look them up tomorrow. What year are your heads?

Your probably right on that and I used to run a 50/50 on my subie, but I went back to 100% recirc to lessen the rich pops from the exhaust on every shift... Got annoying after a while. Every time it dumps air it was registering it coming in and adding excess fuel that wasn't needed.

As far as being able to use a blow through setup, he could but it's more of a routing issue than anything else... If he was using a different type of intercooler then he may be able to place the BOV further away from the MAF and make it work right but since the intercooler is right on the strut tower there is just no way its going to happen without giving the maf a false reading. It's also a bit weird since it's a SC... the SC itself never stops producing pressure like a turbo does at idle, Tyler notices a lot of air flowing out of the Bypass valve at idle which is what gave it that swirling affect on the MAF... I don't know of any other SC'd OBDII cars out there other than stock ones, which are all suck through setups since the SC is mounted right to the intake, Mars was OBDI so no maf involved.

And IIRC RSM sold this kit and a ECU mod to "remove" the MAF sensor from the system and revert it to speed density... I don't know how many GA guys bought this setup and are running it and how they configured the MAF, and that's only if they are using a bypass valve which is only "needed" when you exceed over 5PSI peak IIRC.

[Z26_T]

Gm service info says 24 lb ft on a 06 Malibu rocker arm bolt. Thanks for all the good info. I will look into it if I have any issues with my Maf. but like you stated, it's a bit different with a turbo since I don't start boosting until about 15% throttle. My Maf is also about 18 inches away from the bov

[3X00-Modified]

Yeah, I think the most Tyler could get was 6"

[Slinky]

Got my engine bay caps and strut tower caps back from anodize that I CNC machined, they look pretty good I just engraved them..

[MY91GT(Z)]

nice i want a set those will look killer with your car

[Slinky]

Thanx, i couldn't say paying $360 for caps so i programmed,machined and engraved my own, I'm very happy with the results and think they really complete my bay