The supercharger is much louder, I would guess its to the point where other motorists mite think there is some thing wrong with the car.


the heat from the weld warped the surrounding area which caused the rotor to bind. it took more work then expected to finish it up

 

Video on car?

 

I'll make one next week

 

You're a brave man 03xtype. I commend you for embarking on this feat. Well, aside from more whine, did she make more power? I don't think I could deal with anymore whine than my "Mafioso" air intake tubed cat dishes out. Ditto to a vid and good work.

 

I believe Stiegiemier measured more hp with closing off the bleed-off ports?

 

What actually was done to your supercharger & why? I had my supercharger ported & don't remember that. I do understand your comment about noise, my car sounded like a fighter jet with all the supercharger whine.

 

The cobra/lightening folks claim to use industrial strength epoxy which is stronger than JB Weld...There's been some reports of folks removing the S/C nose and rotors therefore never even removing the S/C...

 

I had some repairs that involved the SC to come off. While it was off I figured its a good time to swap out the bearings and clean it up. I saw some posts on closing the ports also so I figured I would give it a try. I was to afraid to use an epoxy in case of a vibration making some come lose. But a less hot way would be best, If I knew it would warp I wouldn't of welded it closed. Maybe thread some screws part way in some where on the case that can hold a plate to cover it? Or spot weld a cover to reduce the heat.

 

JgaXKR, hows your XKR runnin with the blower ported? Noticeably stronger? Have a smaller pulley?, etc.

 

Spot weld a cover might be the best bet. It really wouldn't need to be a 100% air tight seal really, would it? Just enough spots to make sure the cover will stay on there securely and I'd think that would accomplish the job without the heating issue of a full on weld-fill. I'd also be a little sketchy on epoxy but there are some pretty strong ones out there these days.

Nice job overall! Thanks for the info.

 

Why do this? it risks a supercharger housing.

What's the benefit? More noise isn't a plus to me, more power is. Does it give a noticeable gain in power?

 

No offense but perhaps you shouldn't be posting in a title named "welding s/c SILENCER ports" since it isn't a plus to you...

 

The thread hasn't drifted off-topic? OMG.

 

And I haven't even mentioned nitrous, which would be a big plus for adding power and doesn't affect s/c whine very much...

 

From reading the cobra forums, they say you see a .5-1psi increase











Nitrous

 

Re: .5-1 lb. boost increase with covered blow-off ports: I've read the same Mike.

 

HMM NEVER HEARD OF THIS. AS FAR AS WELDING I USE THIS
Heat Block (Quart Jar)
ITS A GREAT HEAT ABSORBER TO USE AROUND WELDING LIKE THIS
IDE REALLY LIKE TO SEE MORE DYNO'D INFO AND REAL WORLD FIRST. I HAVE A MP90 ON MY FRONTIER I SUPERCHARGED A FEW YEARS AGO

 

I cant comment on feeling a power increase due to never giving it full throttle previously due to other issues.

 

What might work without welding is to fabricate a thin aluminum plate that duplicates the floor of that chamber and has an opening matching the main opening, but no openings for the bleed ports. Slather jbweld on the plate and glue it to the floor. The most that could happen if the plate comes loose is rattle around in the chamber as it is too big to go in either direction. If the plate extends up the sides like a "U", it cannot even do that as the top cover will hold it down with mechanical pressure.

You could also have openings for the silencer ports, but smaller ones biased towards the sides.

 

In the spirit of staying on topic I have seen before and after dynos on Cobras that didn't show any increase in anything but sound. Also spot welding on alternating sides and allowing time to cool helps when working with aluminum.

As for the off topic, Nitrous is highly recommended! I love mine and it came in handy the other night after all my car buddies got together for the day!