exhaust system

Have an A-1 exhaust center vent on my JPS. The muffler is approximately 4 inches off the pavement, positioned vertically side to side. My dilemma stems from the mild scraping that results from going in and out of driveways. When I remember to go diagonally there is no scraping. Any ideas as to what system would eliminate the scraping or what I can do to the A-1 to rectify the problem????? Appreciate any ideas. The system I have works great but I'm tired of the scraping. Thanks

Bob

air suspension would help. :)

I eliminated that hemorrhoid of a muffler altogether and put a Flowmaster Hushpower muffler on mine, Bob. Dale Bates installed the same system on what is now British Boy's IM.
Fantastic sound and no clearance issues.

Very nice, Terry. Did you have the muffler part custom made?

Terry, did you replace the whole system or just the muffler?

Bob

Lane, the only custom part was the U bend off the header. My muffler guy had to fabricate a "Bishop's Hat" because of the tight quarters. Dale's car didn't need it because of the forward engine placement in the IM.

Bob, the header stayed as is. My muffler guy re-used the flange from the old setup.

Thanks, Terry. Do you recall which muffler you chose? Many choices.

I'm interested as well. Might be an improvement for next year.

This is what I have. Mine came polished:

http://www.flowmastermufflers.com/shop/index.php?main_page=product_info&cPath=0&products_id=2642&ab=12018300&recordID=&vehicle=&orig=12018300

I know, this ain't playing fair on this post because I have a Type 4. I put this Tangerine (aka expensive) system in and it's all backwards-like, but it sure gives you plenty of clearance. Just another good reason for a Type 4.

Mine is an A-1 Sidewinder on a Type Iv. I started out with pretty serious scraping issues when I failed to start up a steep incline straight on. This muffler is the one that doesn't require you to remone the thing to adjust the valves---I just wouldn't accept that.

Anyway my Vintage came with nifty adjusters welded onto the plates and it is a simple task to raise the rear end which I did.

I learned as I was working through that issue (From Alan Merklin, I think) that a Speedster should have a certain amount of the side rubber showing on the rear tires---I'm thinking 3-4" help me out here, Alan. After doing the 5 minute adjustment---zero scraping ever---even hitting inclines straight on.

There is zero diffefence in the appearance of my car's stance either.

There really is a hell of a lot of piping on these header/muffler systems ---I believe that a certain length is necessary for proper scavanging.

Raise that rear end some!

I've found that cornering (even spirited cornering) with me and Kathy in the car, nothing rubs.

However!

Put my super-wide-butted sister in the passenger seat and that side rubs something crazy!

So, the moral of this story is: Keep your super-wide-butted-sister the hell out of the Speedster!!! And I'm happy to do just that!

Jack:

The length of the zoomie tubes doesn't matter much for scavanging (that's more of a fluid-dynamics type of thing), but the inner diameter DOES matter for where, in the RPM range torque is introduced/highlighted. They sound the same, but they're not.

And, yes, it looks like a basket of snakes up under there. Drivers of in-line 4-bangers are jealous of us, for sure. Would that they could have cylinders 30 inches apart! Then, they might sound like a Boxer engine! My head snaps every time I hear a Subaru!