[RyanGT]

My KB might have leakage, joe hasnt been on in few days so figured i would ask everybody. I had 16psi peak boost on the dyno. average was 14.5. Im now reading 12.5-13ish on my boost gauge. Its not being revved to 6+ rpm so i know it wont totally peak but it will be close since the kb is a PD blower.

Whats changed since then is a tighter belt, A/C delete kit, and the boost gauge also oil level.. It has a 14 psi pulley, without cats.

The ac delete pulley is significantly smaller than the original ac pulley. About 3 inches less of belt contact. Like a total 4 or 5 inches smaller in diameter. Would that effect boost at all? I thought it would just be the crank that would effect it.

The oil level was lower than desired... thats why im curious if its just leakage or just lower boost level. Lower the oil the less turbulence (kb website says). Its now at the normal mark (first notch) It was probably half an inch possibly a bit more below that. Which is not good! Wondering if it was damaged...

I checked for vacuum leaks with carb cleaner and couldnt find anything! Sprayed down the blower seals extremely well. And the hoses and where they seal, and nothing. Vacuum is about 14 at idle with 1k rpm. (curious if you guys with boost gauges get about that).

13 is decent amount, but it was making 16. I dont want a blower that is working for 16 only making 13... Any opinions on what to check? Or if it was the oil level that effected the boost a little bit combined with the ac pulley?

[RyanGT]

Might be worried about nothing... But plan is to get headers put on next week. So boost will go down more, so would like this resolved before they go on.

[RyanGT]

Boost gauge is tee'd into the vacuum line. There is also the kb bypass on there, as well as the frps. And the boost gauge is located under dash, so it runs from the tee all the way to inside car, about 2.5 feet. Joe said that shouldnt matter, but im giving you guys all the info possible! The boost gauge is a 3/8 hose, and other ones are 1/4. All tees are extremely tight and not leaking.

Mods in garage also.

[03zycobra]

I think the a/c pu;;ey might have something to do with it. Of course the change in oi; level could too........ I know that's a lot of help but at least you know that your blower is,nt experiencing vac loss

[RyanGT]

I kind of hoped thats what it was, just a little difference in pulley ratio and oil that put it a little lower. Im fine with a blower making 14 psi when working for it. Just dont want it working for 16 and making 13. Temps were about 16 degrees hotter than when i dyno'd too so that could have also skewed it to a tad bit lower.

Anybody else know about the ac pulley changing boost a bit? i need a bigger one if it is

[limited]

the a/c delete won't have nothing to due with the blower ratio,just the crank and blower pulley's do. could also be your guage, I run 14" vacuum at idle but I have stage 3 blower cams. I see 10lbs on my guage with a 9 psi pulley. the oil level on the blower should be at the first mark for racing but at the second for street. Is your oil foaming?

[RyanGT]

Really the oil level should be that high? Kb's website said top mark was for 6-15 psi second mark was 16-19, and 1/4 inch below is for 20+psi.

http://kennebell.net/techinfo/genera...chargerOil.pdf

Oil is maybe foaming a little bit, not that much though. Could that be the lost boost? Im thinking about tee'ing it another place, and having the gauge being by itself. Still in process of tuning drivability because of the bypass issue, so its only driven for datalogs.

At about 1.4k idle rpm its about 15 vac. But i seriously cant find any vac leaks, i made one (to see how it would read) and it was at about 4 vac. (by unplugging a tee part way).

Could timing have anything to do with it? or damage to blower? Really dont drive it that often so low oil probably wouldnt of damaged the rotors. And its not leaking from the seals (that i know of). I really sprayed that bitch down with carb cleaner.

[RyanGT]

On a side note, anybody know the size of fitting i would need or could find one. Bolt size is 10mm thread size is 1mm. Hose is a 3/8in.

[limited]

the oil level is whats written in my instructions,15 psi is pushing it for a 2.1, so if you were seeing 16 thats pretty damn good imho. the oil foaming is more than likely due to airation(sp?) from boost leaking by seals,assuming oil level is correct. what kind of issues are you having with the bypass? driveability wise? I know bank two runs lean because of bypass placement, but I had more of an issue with the egr valve. Joe got my car running good so I would have thought he would Know what to do with yours(my car was a learning curve for Him though)

you could hook up the guage on one of the 1/8" pipe plugs on manifold by #8 cyl. this spot is good for an iat guage also since it is a intercooled port

[RyanGT]

Joe just got back to me, told me not to worry about the boost levels. A boost gauge can be + or - a psi. So it could be 2 psi off technically. The foam is more like a little bubbles (barely) if any. And bypass issue is extremely bad at 14psi. Basically its a huge issue if you have cams, head work, or 14+ psi on a 2.1.

What was wrong with your egr? I could throw a delete on it and just leave it hooked up for when emissions comes by (for visual).

[limited]

I had a bad surge at cruise and tip in hesitation,unhooked the egr and it went away. I have two tunes I use from Joe. I have one with all the emisions on(egr mainly) that pass's emissions here in washington with my stage 3 cams (just passed a couple of month's ago)and one with egr off for eveyday driving

[RyanGT]

So its still hooked up just turned off with the tune? Pretty sure mine already is. M other tuner did that. ( i know i have 2 working on it ) lol. Joe is spending a lot of time on my car though, on tune number 8 (thats after i already had a base tune from a dyno shop with WOT done, and the "kb fix" from tim at mph).

Any idea where to get those fittings for the kb? Summit only sells inch ratings, and i need metric threads.

[limited]

yes,mine is still on and turned off with tune. Joe also spent a lot of time on mine(over 20 tunes) first it was getting it to idle right,then getting it to pass emissions,then adjusting for gt pump and then for a reg tune(and all this for $40!!!!!)

I don't know what fitting your refering to,all fittings on mine are american pipe. the plugs I was refering to are 1/8 pipe and the the ones on rear of blower are np also

[RyanGT]

Yeah thats what im talking about the rear ones. I know the hose size is american or close enough. But im curious about the threads and bolt size. Since i will need to buy one. Pretty sure its all metric (the kb came with that neat little sizer). I would be plugging it into the same size as the hobbs sensor plugs into. Would actually be taking one out since its not even hooked up. Its right next to the vacuum hose plug that feeds the frps and bypass.

[RyanGT]

Found a few fittings that will work, will just have to piece a few together. From summit. Going to get my temp sensor fittings while i get those too since ill have time next week to dink around doing stupid shit on car Maybe thermal wrap the CAI too since that gets hot as hell. And the intercooler hose towards blower. Already have loom on it and it helps, but might as well go all out if i got extra haha