need help with a s/c

Gearbanger 101 · Dec 3, 2005

mustangmike01 said:
Sorry but where are you talking about? What is the PCV? is it the black round thing in the back of the s/c with pink foam?

I see you have the same s/c I have. How do you like it? Dose you're s/c act like a roots or not. mine only reads 3psi at 3,000rpm and slowly gose up from there. It dose not peak boost intill 6,000rpm. Dose you're do that? How much boost are you putting out? When I had it installed it peaked in second gear at 6,000rpm at 12psi. It just keeps going down. People say they do not last long at that boost level and I have to rebuiled it. I have 20,000miles on it now. How any miles are on you're s/c? And do you have this problems?

Thanks, Mike

The PCV valve is that little cylindrical thing sticking out of the rubber orifice on your valve cover. When you pull it out, you should hear what sounds like a marble rattling around inside (which is actually a one way check valve). These often get dirty and full of oily crud because supercharged vehicles tend to suck a lot of oil through them and need to be replaced. You might want to look into getting yourself an Oil Separator to reduce consumption in the future.

As far as boost goes, your M90 should be seeing nearly full boost by about 2500rpm. Before you do any more driving, I'd pull of your charger and get that oil seepage taken care of.

What your friends say about Roots blowers not lasting long is preposterous. As a matter of fact, they're the most durrable and reliable supercharger that has been made to date. 20,000 miles.....HA!!!.....add another "0" to that figure and then you'll see one that needs to be rebuild....but not with only 10% of that on the clock.

jstreet0204 · Dec 3, 2005

Gearbanger 101 said:
What your friends say about Roots blowers not lasting long is preposterous. As a matter of fact, they're the most durrable and reliable supercharger that has been made to date. 20,000 miles.....HA!!!.....add another "0" to that figure and then you'll see one that needs to be rebuild....but not with only 10% of that on the clock.

I think they were probably refering to the motor not lasting long at 12psi, since that is what you normally hear from the KB camp, but 12psi on a saleen series II is not the same as 12psi on a KB. Even with extensive porting the volume of air that gets into the cylinders is not going to be the same.

mustangmike01 · Dec 3, 2005

Gearbanger 101 said:
The PCV valve is that little cylindrical thing sticking out of the rubber orifice on your valve cover. When you pull it out, you should hear what sounds like a marble rattling around inside (which is actually a one way check valve). These often get dirty and full of oily crud because supercharged vehicles tend to suck a lot of oil through them and need to be replaced. You might want to look into getting yourself an Oil Separator to reduce consumption in the future.

As far as boost goes, your M90 should be seeing nearly full boost by about 2500rpm. Before you do any more driving, I'd pull of your charger and get that oil seepage taken care of.

What your friends say about Roots blowers not lasting long is preposterous. As a matter of fact, they're the most durrable and reliable supercharger that has been made to date. 20,000 miles.....HA!!!.....add another "0" to that figure and then you'll see one that needs to be rebuild....but not with only 10% of that on the clock.

I know it should but it has never don that. Even when it was first put on it only made 3psi at 3,000rpm and max boost came on at 5,000rpm at 12psi. That's way I asked jstreet0204 about if his dose the samething.

I'm thing of selling the whole thing anyway, motor, wires, computer, s/c all mods to go with it. I'm thinking of getting a 03 or 04 cobra motor and put the whipple on it, to make around 600rdhp.

jstreet0204 · Dec 3, 2005

mustangmike01 said:
I know it should but it has never don that. Even when it was first put on it only made 3psi at 3,000rpm and max boost came on at 5,000rpm at 12psi. That's way I asked jstreet0204 about if his dose the samething.

I'm thing of selling the whole thing anyway, motor, wires, computer, s/c all mods to go with it. I'm thinking of getting a 03 or 04 cobra motor and put the whipple on it, to make around 600rdhp.

Mine doesn't produce full boost at 3k, but it does get up to about 5 or 6lbs then by 5500 I am at 10lbs.

mustangmike01 · Dec 4, 2005

jstreet0204 said:
Mine doesn't produce full boost at 3k, but it does get up to about 5 or 6lbs then by 5500 I am at 10lbs.

Ok thanks, What did it dyno?

jstreet0204 · Dec 4, 2005

mustangmike01 said:
Ok thanks, What did it dyno?

I haven't been on a dyno since I put the sc on. I do all of my own tuning, so I haven't had a need to. I am pretty close to maxing out the stock maf so I would guess in the 350 hp ranges.

mustangmike01 · Dec 5, 2005

jstreet0204 said:
I haven't been on a dyno since I put the sc on. I do all of my own tuning, so I haven't had a need to. I am pretty close to maxing out the stock maf so I would guess in the 350 hp ranges.

Ok, I have never dynoed my car ether. I was street tuned. The shop that works on it said it is a little faster then the new Saleen mustang s/c with 400hp. I have beet in 03 and 04 stock Cobras.

I have had it for 3 years now and now I just need more power

thanks for the help, Mike

MYSLO4-6 · Dec 5, 2005

Hi mustangmike and jstreet, I have the same saleen supercharger as you guys, I think. It looks just like the one in the picture (mustangmike). I just bought the car about month ago with everything already done, so I'm a little clueless about this blower but this forum is helping me.

I was wondering what type of spark plugs you guys are using, What is your timing set at, air/fuel and are your shortblocks still stock??!!

The reason for asking is that I had it tuned on the dyno and about two weeks after buying it, I was getting down on it and piston #1 broke a small piece of the ring land. I'm having a new piston put in here very soon and was wondering what it should be tuned at.

BTW mine hits 10-12 of boost with no problems, but I guess that might be the problem for my stock shortblock??

Gearbanger 101 · Dec 5, 2005

MYSLO4-6 said:
The reason for asking is that I had it tuned on the dyno and about two weeks after buying it, I was getting down on it and piston #1 broke a small piece of the ring land. I'm having a new piston put in here very soon and was wondering what it should be tuned at.

BTW mine hits 10-12 of boost with no problems, but I guess that might be the problem for my stock shortblock??

If you're going to tear it down to replace one piston, you should at the very least replace them all with forged units.......especially with 10-12psi. It's cheap insurance in the long run.

MYSLO4-6 · Dec 5, 2005

I was going to do that but the shop I use down here said the motor would not be in balance, because they are not taking the engine out of the car. They are going to drop the K-member and replace it for the bottom of the motor. They the stock piston would keep the motor in balance.

Any thoughts on that??

Gearbanger 101 · Dec 5, 2005

As long as you replace them all, they'll come ballanced to one and other. If you're really worried, replace the rods and pistons together and never look back. http://www.modularperformance.com/miva/merchant.mv?Screen=CTGY&Store_Code=MP&Category_Code=EK

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