transmission slipping and exhaust issues with Supercharger

[redssrloaded]

I've found someone near me that can install the Magnuson supercharge for a reasonable price. However he has told me the following in an email. What do you think:

"other things that need to be addressed
on this application is the exhaust and especially the trans.
We have fixed the trans slipping by replacing the power servo
and fourth gear servo. If this is not done the trans will
slip under full throttle. Also the exhaust is restrictive on
these trucks. The trucks have dual cats that go down into
a single muffler and that back out to two tail pipes. I have
some pictures of the muffler system that we altered but can
not find the pictures of the supercharger installed itself. We
modified a bracket to fit the factory engine cover so you could
not tell without looking close that there was a supercharger
on it, it looked factory."

I have no idea what he is talking about. Is he right? Should I modify the exhaust and the tranny also? How about the breaks?

[Greg Ducato]

Changing the servo for 2nd gear would be a good idea. Using a Corvette servo will greatly increase the band apply in second gear and will really be helpfull in keeping the trans from slipping with the additional power. I don't think you will need a special 4th gear servo unless you plan on some hard charging at 100mph plus. As for the xhaust, if you are putting a big lung on this engine to pump the good air in, then you will need to address the issue of getting the bad air out, so yes, you will need some exhaust mods to make the supercharger swap the best it can be.

[2005SSR6Speed]

I concur with Greg on the comments above.

[redssrloaded]

Thank you very much to both of you. You provided a great service to me and I greatly appreciated it. I wish I could come to SoCal for your special

Does GM have a big problem with these additional mods? I know the S/C mod is probably OK, buy how about the tranny and exhaust? I have an extended GMPP for another 5 years.

How about the breaks? Any need to upgrade there?

[Greg Ducato]

The Corvette servo is a GM designed part and is used in many factory applications so I don't think you could void a warranty with this item, I can't comment on the other mods.

[WOW_FCTR]

The one thing about the exhaust that wasn't mentioned yet is that the Magnuson extra warranty will be void if you change the exhaust. So don't buy it if you plan on changing the exhaust. (the extra warranty covers drive train failures, not just the SC.)

[Flassh]

Red,

You need to be on good terms with your Chevy dealer when it comes to mods. The supercharger would certainly give them an out on any warranty coverage regarding engine or drivetrain damage, but it would become a dealer discretion situation. He doesn't HAVE to tell GM you have a supercharger on it. It shouldn't affect your brakes, suspension, top, power steering, alternator, or anything else not directly affected by the extra power.

I suspect Magnuson is affecting its sales by not extending their warranty to vehicles with modified exhausts. Anyone looking to spend the bucks for a supercharger would very likely have more mods in mind. Doesn't seem like the exhaust improvements should have a negative effect on the supercharger.

[Beach potato]

Great advice from everybody....also read JimG's E-book chapter 10 thru 16 for more excellant advice on mods.

[redssrloaded]

So I finally got a cal back from hi and this is what he wants for all the mods, let me know if it's reasonable:

S/C+ install and the Magnuson warranty $6000
The bracket would be $250.00
Trans $500.00 (we use only billet parts for trans)
Exhaust $500.00 Flowmaster
$600.00 Edlebrock Stainless mufflers


It would be dumb to void the Magnuson warranty to mod the exhaust. So should I just forget about it?

[WOW_FCTR]

Originally Posted by redssrloaded

So I finally got a cal back from hi and this is what he wants for all the mods, let me know if it's reasonable:

S/C+ install and the Magnuson warranty $6000
The bracket would be $250.00
Trans $500.00 (we use only billet parts for trans)
Exhaust $500.00 Flowmaster
$600.00 Edlebrock Stainless mufflers


It would be dumb to void the Magnuson warranty to mod the exhaust. So should I just forget about it?

It only voids the extended/extra warranty that you'd pay $300 extra for, that would cover the drive train. (I'm sure I'm getting this info right, but since I haven't actually pruchased one, I'm not %100 sure). The warranty that comes with the SC only covers the SC and isn't voided by an exhaust change. Of course all of this is probably on their website.

[XSELER8]

Also, install a boost gauge.

[Greg Ducato]

Personnally I think the billet servos for both 2nd and 4th gear are overkill especially without any othe mods to the trans. For applications of less than 400rwhp the $35 Corvette servo will be just dandy, power levels over that may need additional servo mods but that would depend on your driving style. Just my opinion.

[redssrloaded]

Just called Magnuson, they said any mod to the exhaust system behind the Cat Converter is OK, no headers. I have no idea what that means but I'm gonna ask my guy. This is in the case of that extra $200 warranty for the drive train.

[redssrloaded]

Joe, if you are reading this, how do I can make sure this guy does good work? I got his contact info from Magnuson website and they only have 2 dealers here in Chicago area. Is that good enough reason to go with this guy? His response to my exhaust issue and voiding the $200 Magnuson extra warrant was :

"As far as the exhaust goes, the mod's I do is after the
catalytic converters. The pipes come off the exhaust
manifolds into a catalytic converter, passenger and drivers
side then both pipes meet on the passenger side where
they go into a muffler. The exhaust exits the muffler via
a single outlet and then splits into two. What I do is at the
muffler input I remove the stock muffler and put in two
separate mufflers and then remove the Y-pipe on the output
and run dual pipes connecting to the stock tail pipes."

His price seems reasonable and he is giving me a bit of a break if I do all the above mods.

Thanks

[XSELER8]

Dessrloaded. Definitely research your installer. I had a bad experience (My Mustang) from a recommended performance shop. I took it elsewhere (250m round trip) to have it retuned & tweaked. And don't let price or distance be the issue. Have it done right the first time and it's a good deal. Tell the installer/tuner your intentions. My car is not a serious racer. I went for a safe /reliable tune. Driveability was my first concern. Good luck with the blower.
You could inquire about installers on a Corvette forum. You would get a lot of good feedback on performance shops. Just a thought.

[Double-L]

Originally Posted by redssrloaded

So I finally got a cal back from hi and this is what he wants for all the mods, let me know if it's reasonable:

S/C+ install and the Magnuson warranty $6000
The bracket would be $250.00
Trans $500.00 (we use only billet parts for trans)
Exhaust $500.00 Flowmaster
$600.00 Edlebrock Stainless mufflers


It would be dumb to void the Magnuson warranty to mod the exhaust. So should I just forget about it?

A lot of BS, Not a bad price for the super charger but if you are not going with headers unless you just want the sound the exhaust doesn't have to be done and in fact when I just had a super charger I loved the sound of it , Now the tranny if you leave the torque setting the way the factory has them your tranny is not going to slip I don't care how much extra power you add, I run at the drag strip for about 6 months with the stock tranny and no sign of slipping, Make no since to me to pull the tranny with out changing the torque converter, Also add a boost gauge, Later if you get into some speed parts you will need a fuel pressure and air/fuel mixture