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Long tubes and clearance

Old Dec 23, 2002 | 08:44 PM
  #1  
jamesbob02's Avatar
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From: Oklahoma City, OK
Car: 92 Z28
Engine: 357 TPI (L98)
Transmission: 700R4
Long tubes and clearance

I hear a lot about long tubes are the only way to go so thats what I really want to do, but the car's gotta be streetable (incline driveways, speedbumps and all) so, obviously I'm worried about clearance.

I know this has been beaten to death, but I heard some guy talking about using poly motor mounts that raise the motor about 1.5". I figure that this could positively impact ground clearance with longtubes. Anybody have experience with this or have an opinion.

Honestly, I'm just trying my hardest to find a way to put longtubes on my car without worrying about clearance. Thanks!
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Old Dec 27, 2002 | 01:11 AM
  #2  
jamesbob02's Avatar
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Joined: Oct 2002
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From: Oklahoma City, OK
Car: 92 Z28
Engine: 357 TPI (L98)
Transmission: 700R4
ttt

Anybody?
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Old Dec 27, 2002 | 08:18 AM
  #3  
TRAXION's Avatar
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Joined: Jul 1999
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From: Maryland
Car: 2005 Subaru STI
Engine: 153ci of Turbo Power!
Transmission: 6-Speed
I'm running long tubes with poly mounts. I don't have any good pics of the ground clearance but I'll get some within the next 2 weeks. In any case ... you MIGHT be able to get an idea of the ground clearance from this quick video ...

http://www.celligent.com/tim/iroc/movies/lts.wmv

I have the Mufflex Y-pipe mated to the flowmaster force II catback. No cats. The Y-pipe had to be modified by a local shop because it tucked up TOO close ... maybe a result of the poly mounts pulling the motor up? Not sure.

Tim
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Old Dec 27, 2002 | 10:58 AM
  #4  
Phil87IROC's Avatar
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Joined: Jul 1999
Posts: 247
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From: Tucson, Arizona
Car: 1987 IROC Z28
Engine: 6.0L LQ9 crate engine
Transmission: Performa Built 700R4
Axle/Gears: 3.42 10 bolt, Eaton/Moser
LTs............

I have had LTs on my IROC for 2 years now, I have poly mounts too......I drive the car about 70 miles a week on all types of roads. I have scraped the y-pipe once!! Only once. Y-pipe is the lowest part of my exhaust. It's not a problem for me. The lowest part of my car is still the stock front air deflector for the radiator. Like TRAX, I had my y-pipe modded to give a bit more space between it and the crossmember and DS/TA. I did have to dimple one pipe on pass side which rested against the A-frame.

Bottom line, if you drive your car so that you never scrape your air deflector, then you'll never scrape your LT-based exhaust.......

I'd say go for it, especially for a 350 car with a good cam.......
Attached Thumbnails Long tubes and clearance-myexh1.jpg  

Last edited by Phil87IROC; Dec 27, 2002 at 11:03 AM.
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Old Dec 27, 2002 | 11:22 PM
  #5  
jamesbob02's Avatar
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From: Oklahoma City, OK
Car: 92 Z28
Engine: 357 TPI (L98)
Transmission: 700R4
Thanks guys, that's truly a lot of help. Before, I was almost completely against getting LT's for my streetcar but you've given me a lot of hope! Thanks again.
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