NO exhuast whatsoever

**ChaseR** · 02-27-2004, 11:35 PM

OK I was cutting my cat off today and I ran out of time becuase i had to go to work so I didnt have time to bolt up the exhuast again. LOL it sounds like a TOP fuel dragster and it sounds a lot faster

**johnwc723** · 02-27-2004, 11:38 PM

yeah well the great part about the whole exaust game is yes no ehaust is faster than anything else (less back pressure of course) i love it when people put the BOMB mufflers on there and they are louder than than if you were to just have no exaust on at all!

**riced_roach** · 02-27-2004, 11:54 PM

No exhaust is a good way of losing HP. You require some backpressure for a naturally aspirated engine. If you have a turbo you can get away with no muffler due to the characteristics of muffling from the turbo.

Perhaps it'll sound faster but I'd almost guarantee your slowing down.

**smufguy** · 02-28-2004, 05:30 AM

Originally Posted by riced_roach

No exhaust is a good way of losing HP. You require some backpressure for a naturally aspirated engine. If you have a turbo you can get away with no muffler due to the characteristics of muffling from the turbo.

Perhaps it'll sound faster but I'd almost guarantee your slowing down.

Defenitely true for street cars with mildly tuned engines.

Get a hig revver that guzzles gas at the Drag strip, and its a NA motor. Well then yeah u dont need anything beyond a 4-1 header. That is only if ur revvin like those friggin modded B18c5s that run strictly on track.

**jagojon3** · 02-28-2004, 09:00 AM

Originally Posted by smufguy

Defenitely true for street cars with mildly tuned engines.

Get a hig revver that guzzles gas at the Drag strip, and its a NA motor. Well then yeah u dont need anything beyond a 4-1 header. That is only if ur revvin like those friggin modded B18c5s that run strictly on track.

4-1? I don't think so.

**ChaseR** · 02-28-2004, 11:54 AM

Oh Definitly I put the "new" pipe back on without the cat and its noticably faster than without an exhuast at all.

**ChaseR** · 02-28-2004, 12:06 PM

Does anyone have any idea on about how much power is gained from doing this mod?

**86LXItooFAST4me** · 02-28-2004, 12:22 PM

im guessing 10-15 but it depends if you have any other mods, it corresponds with the rest of your air flow.

**riced_roach** · 02-28-2004, 10:34 PM

Dont expect miracles from an exhaust system. I would say if you can gain 3-5% your doing extremely well. Headwork, cam and more compression is what makes a significant difference. Since majority of guys stick with stock stroke I'd say theres one of the biggest limitations.

**smufguy** · 02-28-2004, 10:42 PM

Originally Posted by jagojon3

4-1? I don't think so.

i was talking about 'backpressure' for midly street engines, not the 4-1 header, but for high revviing all motor drag cars do need 4-1 headers.

1988starter · 02-29-2004, 09:20 PM

Stop throwing the word back pressure around you don't actually need any. Think of back pressure and exhaust velocity as 2 different plots on a graph the goal is to try to get as close to ZERO back pressure ZERO is ideal while maintaining the max exhaust velocity.

**smufguy** · 03-01-2004, 04:04 AM

Originally Posted by 1988starter

Stop throwing the word back pressure around you don't actually need any. Think of back pressure and exhaust velocity as 2 different plots on a graph the goal is to try to get as close to ZERO back pressure ZERO is ideal while maintaining the max exhaust velocity.

1988starter · 03-01-2004, 05:14 AM

read this it may help
https://www.3geez.com/forum/showthread.php?t=352

**smufguy** · 03-01-2004, 06:35 AM

starter, i know it man. There is a reason i put the word BACKPRESSURE in caps. It was to quote Riced roach and explain f22a89accordLxi and jagojon3 in his own words the use of 4-1 headers, not in my words.

1988starter · 03-01-2004, 06:58 AM

sorry man my bad I missed the ' '

**smufguy** · 03-01-2004, 10:33 AM

Originally Posted by 1988starter

sorry man my bad I missed the ' '

**lostforawhile** · 10-30-2006, 04:27 PM

Originally Posted by AccordinglyAZ

OK I was cutting my cat off today and I ran out of time becuase i had to go to work so I didnt have time to bolt up the exhuast again. LOL it sounds like a TOP fuel dragster and it sounds a lot faster

yea I have a straight pipe with a cherry bomb,it sounds like that every day. thats plenty of back pressure if you run a full length pipe. just don't want to go too big on the pipe diameter. of course it was a lot louder for a little while until i fixed the exaust studs LOL but the fumes were killing me

**lostforawhile** · 10-30-2006, 04:33 PM

Originally Posted by riced_roach

Dont expect miracles from an exhaust system. I would say if you can gain 3-5% your doing extremely well. Headwork, cam and more compression is what makes a significant difference. Since majority of guys stick with stock stroke I'd say theres one of the biggest limitations.

I think with this exaust you gain a little more then with the better exausts on modern cars. back when these were made the term performance import wasn't very common. they were trying to make it quiet performance be dammed. in other words nobody cared if it strangled the motor. with modern cars they are a little more performance sensitive and the exausts are better designed. the factory exaust on this car sucked. pure and simple

**Versanick** · 10-30-2006, 04:41 PM

give him props for having no exhaust. it's badass. however, you'll get very sick from NOX (when lean) and [all kinds of nasty stuff] when rich, fumes entering your car from underneath. When my carbd 86 had no exhaust (i was driving to the shop to get it put on), we drove 15 minutes ins top and go traffic and my friend and I were literally sick and dizzy for weeks. probably carbon monoxide poisoning. sick to stomach. it was awful.

good luck. and get a muffler on that thing.