I have a 1970 Chevelle with two(2) 455 Oldsmobile engines.I had both of the carbs rebuilt and flow tested.I could not make the front engine run,it would constantly shut off when I tried to give it some throttle.It would only run about 200/300 RPM's.I swapped carbs from front to back with the same results.The back engine would fire up instantly and the front engine wouldn't run.I figured air in / air out,so I took the diffuser plates off the supertrapp mufflers for the front engine and found one of them completely blocked.Cleared the plugged side and the engine started instantly and throttle response was just how it should be,nice and crisp.The mufflers had only six(6)diffusers on them because I removed about six(6) when I first built the car because it was too loud.I don't know whether the debris came from the exhaust(which is aluminized) or the muffler,but once it was out of there the engine ran as if it were new.Even though the car has less than 150 miles on it,I finished back it in 1992.This is for those of you that have Supertrapps,check them at the diffusers every once in a while,you may be slowly losing ground and not realizing it because it is happening so slowly.More diffusers will make it louder and help prevent this from happening to anyone else.I was starting to think I had an internal engine problem,I'm really happy that it turned out to be something so simple,now I can relax and finish getting the car ready to sell.

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#1112
Question my ability,question my intelligence,never question my integrity!
87drivetrain http://fieroaddiction.com/SBCTa.html

I still wanna see pictures of this beast...

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1986 SE 350 V8

Is this anything like that crazy Toronado from the 70s that could never hook all 4 tires for the whole 1/4 mile?

I played around with the number of disc on my 4" trapps for months. I finally decided I liked it best with 9 discs per trap. I ran 7 for a long time for the sound issue, but eventually i got sick of driving under 1500 rpm to please the locals, and the difference isn't much if you are letting it rev. I still shift way too early late at night, but If the sun's up, I'm hitting 6000 every gear. Screw the neighbors.

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Like electronica?
http://www.rantradio.com/rr-industrial128.pls

quote Originally posted by tesmith66: I still wanna see pictures of this beast...

So do I !!!!! I have been checking the forum because I know there are pictures somewhere on it,but I can't find them.This is the second time I've looked.

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#1112
Question my ability,question my intelligence,never question my integrity!
87drivetrain http://fieroaddiction.com/SBCTa.html