does turning of the ignition for a few seconds then turning it back on to create a backfire hurt the exhaust?it is as funny as heck, i ve only done it once though.

 

if you dont mind possibly the chance of blowing off your exhaust maniflolds or the posibility of reforming pistons and bending rods. just my two cents. oh yeah by the way, i think its preaty funny also.

 

I did it onece accidently, and it split my muffler like the house of representives around election time.

 

I had a new 1979 f-150 4x4 with the 400m in it with headers and dual turbo’s. I was young and thought it was funny too. I did it hundreds of times. That is until it blew my mufflers right out the side. Other than that it didn't hurt anything else. If you pump the gas while it is off it will load up the exhaust with fuel for a much bigger bang. The cops don't think much of it. One time in a tunnel I did this on my motorcycle. I cut the ignition pumped the gas then put the switch back to run and a huge bang followed by standing on the center stand for a good bunch of sparks was really funny. It sure got the tailgaters off of me. I am much more responsible now. Ya right. Ha Ha

 

Sounds like it could be a very expensive joke.

 

Back when I was younger .... and more foolish ... I was driving a Ford F750 dump truck hauling gravel. We'd been hauling past this one place all day. Two girls, both well racked I might add, were bikini sunbathing in the front yard. On the previous round I had noticed they had their tops untied lying on their stomachs.

I switched off the ignition, waited expectantly, and switched back on again .......KAAAAPOOOOOOWWWW!!!!! They both jumped right straight up!!! Unfortunately they had retied their tops since the last round and all I got was two very! dirty looks.

Yeah, it was funny!!

 

I agree with Roger, it is probably not a smart thing to do to your truck, but when other more important prioraties arise, why not do it!!

 

I have the 75 F250 that my dad bought new when I was a kid. One of my favorite memories of this truck is that for YEARS whenever my dad was driving, he could make it backfire out both exhausts at the same time (pipes were routed out in front of the rear tires) just by letting off the gas. Well, me and my dad always thought it was funny, and he especially liked to make it backfire whenever he passed a kid riding bicycle on the side of a country road (Good one dad! He's in the ditch, he's in the ditch!)
Finally, my dad started hearing a growling grinding noise coming from underneath the truck, unable to find the problem, he took it to the mechanic. Once it was up on the lift, the mechanic came and got my dad and me and showed us what the problem was. Turns out all those blasts out the exhaust over the years had blown the mufflers up untill they looked like swollen ticks hanging on the underside of the truck, and one had swollen up so much that one of the U-joints was starting to hit it and had cut a perfect U-joint sillouette in the side of it. After that, my dad decided that since the whole backfiring thing was going to cost him money, it needed to be fixed. The mechanic found a bad vacum line on the emission controls and cured the problem. It hasn't done it since.
I recently told an old high school buddy that my dad had given me his old truck, he said "You mean the one that back fires all the time?...Cool!)

 

One of my favorite sites from earlier days on the Internet, "Cockney Pavement Terror", featured pictures of people having their wits scared out of them by a photographer with a backfiring delivery van.

This site goes way back to the early web dates, 1994 or so (I remember when it first appeared, back then you could visit virtually every site!). The site is gone but the 1996 version exists on the Internet Archive:

http://web.archive.org/web/199611040...e.com/pterror/

 

At one time we had a 79 F250HD 460 C6 4.10 that had a backfire problem. Sometimes if you simply backed off on the throttle and then hit it again it would go off. Dual exhaust and it twice blew both mufflers wide open, split them on the seam like they'd been opened up with a can opener. Auto supply outfit set us up with a pair of medium duty Dodge truck mufflers and double clamps. It still backfired but not disasterously.

 

your not gona hurt your motor the explosion dosent occur in the motor it happens in the pipes worst thing likely to happen is rupturing you muffler or tailpipe. otherwise you may hurt someones feelings! DW