North American Turbocoupe Organization

Less exhaust, less boost?
Huffin Offline
Junior Member
I ran out of time last night to finish my exhaust. I got up this morning and the battery was dead in my jeep. Sooooo I drove my TC to work today with just the downpipe; I wanted to evacuate my AC anyhow so no biggie. I notice that I have very little boost and that it takes forever for it to come on.

Could my exhaust be TOO free flowing right now?
88 TC, Auto Sad

Pete D Offline
In theory, no, the open exhaust should not be the problem. I think a few others in similar situations have reported similar outcomes. Can't explain it. Are you sure nothin gis restricting air intake?
Pete Dunham


FlyByeBoy Offline
In theory it should have no effect but back pressure is a trick thing. With only the down pipe do you hear the turbo whistle even in neutral with just a little rpm above idle?

88 TC X 2 One stock one not so stock. (NATO Member)
Not So Stock 88 TC. 94 SHO w/5speed. (NATO Member)

1987tc Offline
Senior Member
When I drove my old (red) 87tc to get the exhaust done all I had was about 1 foot of down pipe. Boosted great! Sounded like a 747 taxing for take off even at low rpm. I could hear the turbo at anything above dead idle.
Sold my Turbocoupe. It went to a good home.

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