Picking exhaust

[565bbchevy]

You might as well plan for future power upgrades and throw on a 4-1/2" exhaust system. lol

 

[454GrandPrix]

You might as well plan for future power upgrades and throw on a 4-1/2" exhaust system.

I find your ideas intriguing and would like to subscribe to your newsletter.

 

[64nailhead]

I run a single 4" off the turbo and I worry that it's too small

 

[pontiacgp]

I run a single 4" off the turbo and I worry that it's too small

I know a shop who specialized in turbo buicks and their performance exhaust was a single 3" pipe. Those cars were set up for the track and did very well with a few other upgrades. The shop is now closed and the owner has passed away.

 

[SRD art]

While I was researching what others had done for exhaust when I swapped in the higher hp motor I read of some nasty turbo imports running over 900 hp through a single 3" exhaust. These guys were serious! And I honestly was quite surprised they went with that small a system, but maybe the increased velocity of the smaller single pipe helped build low end and mid range where those little motors lack.

That 4.5" system looks incredible!

 

[UNGN]

The key to making power with a turbo is zero backpressure. If the outlet of the turbo is around 3" and the muffler is straight thru 3", running a mandrel bent single 3" shouldn"t give it much backpressure.

Smaller pipes NEVER help a turbo motor, but as long as they don"t create backpressure at the max flow rate, they won"t hurt, either.