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Hi all:
**LEGAL: The subject truck is used off-road only and is therefore emissions exempt**
I just finished putting true duals on my '92 explorer. I cut the factory Y-pipe apart and added some bends to it to get dual 2-1/4" pipes running right next to each other along the passenger side of the transmission. They run about 4 feet and then end in a 2-1/4" X-pipe. From there, dual 2-1/4" pipes run over the axle and in to dual thrush welded (knock-off Flowmaster 40) mufflers. The mufflers have turn downs half cocked to each side.
Anyways, at idle, it sounds great, with a very deep, pulsating rumble. From about 3000 RPM to redline, it once again sounds awesome, pretty much the best sounding six I've ever heard. My complaint is 1500-3000 RPM, where something starts resonating terribly. It's resonating so bad that it sounds like one of the pipes is rattling on the frame of the truck. I've checked and double checked all clearances and have at least 3/4" everywhere, so it's not rubbing.
Anyone have any suggestions? I'm thinking maybe I should put some glass packs in the 4' section before the X-pipe...
**LEGAL: The subject truck is used off-road only and is therefore emissions exempt**
I just finished putting true duals on my '92 explorer. I cut the factory Y-pipe apart and added some bends to it to get dual 2-1/4" pipes running right next to each other along the passenger side of the transmission. They run about 4 feet and then end in a 2-1/4" X-pipe. From there, dual 2-1/4" pipes run over the axle and in to dual thrush welded (knock-off Flowmaster 40) mufflers. The mufflers have turn downs half cocked to each side.
Anyways, at idle, it sounds great, with a very deep, pulsating rumble. From about 3000 RPM to redline, it once again sounds awesome, pretty much the best sounding six I've ever heard. My complaint is 1500-3000 RPM, where something starts resonating terribly. It's resonating so bad that it sounds like one of the pipes is rattling on the frame of the truck. I've checked and double checked all clearances and have at least 3/4" everywhere, so it's not rubbing.
Anyone have any suggestions? I'm thinking maybe I should put some glass packs in the 4' section before the X-pipe...
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