Wheres My Bottom End

randys85

New Member
Sep 15, 2013
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Hi. Just joined. I have an 85 coup. And working on brothers 91gt automatic. Problem is car is stock except cold air fender setup. From a stop when you mash it tires break loose and soda bottle would flip out cup holder. We put on mac shorties offroad h pipe bullitts and elbows out infront of tires. Used clamps car was fine took it to friends to get welded now no bottom end tires wont break loose soda bottle doesn't move.
 
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I figured welding screwed up computer so that was replaced after various things told to my brother every sensor was replaced inj replaced tps set to .98 plugs wires replaced runs tad better n smoother but still no power but once you hit 3800rpm it takes off and the exhaust tone changes
 
Haha! So, anybody have any ideas that will help. We are going to be building a 331 with eldebrock heads n intake but want to get the problem fixed if its something electrical, tranny or fuel related
 
Hi. Just joined. I have an 85 coup. And working on brothers 91gt automatic. Problem is car is stock except cold air fender setup. From a stop when you mash it tires break loose and soda bottle would flip out cup holder. We put on mac shorties offroad h pipe bullitts and elbows out infront of tires. Used clamps car was fine took it to friends to get welded now no bottom end tires wont break loose soda bottle doesn't move.

So you want your soda bottle to flip out of the cuplholder?
 
So from what I'm seeing after only 2 replies this site would be perfect if I was building a car to compete with comedians are there any real mechanics here or people with some experience
 
in all honesty you made a post about knockng drinks from cupholders but lets get down to biz here. what size headers and piping did you use?
 
The purpose of that was for example of before and after. Exhaust piping is 2 1/2 I have to check the headers don't remember. It isn't a back pressure issue because it ran fine with just the U clamps
 
Auto, tranny was flushed new filter n fluid. I have heard stories on older cars where they grounded welder at tranny and it melted bearings together. But the tranny seems to shift fine
 
Did the first gear thing and even the shift to d and back to hold 2nd. No difference. Doesn't have power till 3800. The exhaust sounds like when vtech kicks in that's how much of a difference the exhaust changes in sound
 
Maybe I'm anal and should just replace motor and tranny but I'm the type that when something is wrong or breaks I replace it but I take bad part apart to see why it broke. I don't want to build my brothers 331 get it in and still have issues...am I wrong for this
 
Yes you are right headers to big will decrease low end but car was fine when it was just u bolt clamps holding it together. Bullitt mufflers welded at end of h pipe. 90° elbows to the bullits. Pipe comes out infront of tires