$5000 budget Mustang

[Norm Peterson]

The brake duct/lower grill isn't finished yet, finished trimming, and welding tonight.

The exhaust had this resination at about 3000 rpm, I assume it was from the way I mounted the mufflers. Everything was in such tight quarters(as I'm sure your real familiar with) that when I mounted the mufflers, I welded three little mounting tabs to the frame, and 3 to mufflers. I used the little exhaust hangers that look almost like a shock bushing. I guess it was kinda rigid, because the front bushing kind fell apart, and started this ratting, that drove me up the wall. I'm hoping the flex in there will correct this issue. Only time will tell.

I think as long as the flex sections have more than enough "flex" to accommodate engine/transmission rocking and chassis flex, you'll be OK. There doesn't look like there's a huge amount of clearance between the muffler inlet pipe and the hole cut in that frame tube, so I can see where looseness at the front of the muffler would make for a rattle.

You'll also relieve fore/aft loads and lateral pipe displacement caused by exhaust pipe expansion - I'll bet it wants to grow quite a bit during a track session, and if it can't grow rearward it'll "pop out" of its cold shape either laterally or vertically. If it's mostly quiet just cruising around on a cold day and noisy out on the track or when driven hard, this is the likely reason.




You may or may not fix the resonance. That's a function of the lengths between changes in exhaust system cross section. Sometimes a drone where the two pipes get to resonating in phase with each other can be reduced or eliminated by making the right side and left side exhaust lines slightly different length ahead of the mufflers. The flex sections will at least shift the frequency that the pipes as a whole will want to buzz at.


Norm

[2blownstangs]

Very awesome car bro. We have alot of the same tastes/ideas. Keep up the great work

[Mr.VENGEANCE]

that exhaust looks sweet Ron!

[andrewb70]

Hey Ron,

It's great that you like the trans. The LS7 clutch is very heavy. The lighter you make the flywheel/clutch assembly, the faster and smoother your shifts will be. When I had the Liberty T56 in my RX7 I was using a Quarter Master flywheel and a single disk 8.5" clutch. The flywheel and clutch assembly were under 20 pounds, combined. That combo really made a difference in shift speed and quality.

Since this is the $5000 build thread, you can dream about a 3 disk carbon/carbon clutch setup with a reverse mount bellhousing. You did say $5000 per major component, right? :-)

Andrew

[Ron S]

Getting that LS7 clutch shimmed right, and the pedal stop adjusted was a PITA, but now that its done, it shifts great. This engine revs so quickly anyway, I don't know if I would really want the thing to wing any faster. And your right, those 2 and 3 disc setups cost way too much.

Did you get your trans. back in yet Andrew? I know it broke, but how do you ike it? Was that the same trans you had behind the big block?

[andrewb70]

I hear what you are saying about revving fast. The LS6 in my RX7 revved so fast that the stock belt tentioner couldn't control the belt well. I would throw a belt on occasion. PM sent.

Andrew

[Damn True]

I hear what you are saying about revving fast. The LS6 in my RX7 revved so fast that the stock belt tentioner couldn't control the belt well. I would throw a belt on occasion. PM sent.

Andrew

That was a neat car.

[Ron S]

Finally finished the lower grill, brake ducts. Put the race mesh in the center to match the grill, the turned out OK, but I wish I could produce these parts out of carbon fiber, would be alot lighter.

[RicerwannaB]

Lots of great info and ideas on this thread! Love the car!

[Six_Shooter]

I like those ducts.

[bonecrrusher]

Get some CF, resin, and a vaccum bag??

[Bryce]

Ron,

CF is not that hard to make, unless you need ultimate strength and/or a perfect finish.

[Payton King]

Dude, that is going to be killer in there.

Tell me you did not cut that board just for place to take a picture. LOL

[Ron S]

Dude, that is going to be killer in there.

Tell me you did not cut that board just for place to take a picture. LOL

No Payton, that is the stuff my contractor has set up in the basement. I'm sure he wouldn't mind me using it.

[Damn True]

Looks great Ron. Has the gears turning for a couple things on my car. How did you affix the mesh?

[Ron S]

Looks great Ron. Has the gears turning for a couple things on my car. How did you affix the mesh?

Its pinched in between a 1" aluminum flat bar, and the framing, and held together with rivets. The hard part True, is building a wooden buck to hammer the mesh over. These weren't that bad to make, the side vents on the car were a PITA though.

[Crestronwizard]

I am in the Baltimore area at least once a month for work.....do you offer tours? :-)

[Ron S]

I am in the Baltimore area at least once a month for work.....do you offer tours? :-)

I work in Bmore, but live at the MD./PA. line.

[Ron S]

Watching that show last night motivated me to finish this lower grill/brake ducts. I kind of liked the thing without the splitter, but its growing on me with it. If the weather holds out, I plan on hitting the drag strip next Sat., interested to see what kind of quarter mile times this thing runs.

[lt1chevelle]

looking good! is that a little nova under the cover?