2wd Exhaust Clearance

[JDon99]

Just thinking out loud here. Is there enough clearance for a single 5" exhaust on the 73-87 2wd trucks? Thanks fellas.

[Pop's C-10]

yes & don't do it...

[INSIDIOUS '86]

Why single? Two 2.5 pipes yield the same with better scavenge less pressure and better sound and can be quieter and yeild better ground clearance. So really not a point
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[JDon99]

Originally Posted by INSIDIOUS '86

Why single? Two 2.5 pipes yield the same with better scavenge less pressure and better sound and can be quieter and yeild better ground clearance. So really not a point
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This exhaust would be on a single turbo setup. Fwiw, two 2.5" pipes flow roughly half of a single 5". Just curious if there is room between the crossmembers and the body for the 5". Thanks for the replies

[INSIDIOUS '86]

Originally Posted by JDon99

This exhaust would be on a single turbo setup. Fwiw, two 2.5" pipes flow roughly half of a single 5". Just curious if there is room between the crossmembers and the body for the 5". Thanks for the replies

In theory yes but one muffler vs two and the scavenging effect plus velocity makes 2.5 far superior

But yes for turbo get a fat downpipe in there and don't go to long
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[andrewmp6]

What turbo are you going to run?Unless its a diesel 5 inch exhaust is over kill.

[JDon99]

Originally Posted by andrewmp6

What turbo are you going to run?Unless its a diesel 5 inch exhaust is over kill.

It would be in the 75-85mm compressor range, lsx engine. There is a guy over on performancetrucks.net that seen a 20 lb/min increase in airflow when dumping his 5" downpipe at the 4" bottleneck in his exhaust. That's a pretty substantial increase in my opinion. That is what got me thinking about the 5" exhaust and if it would even fit under the 73-87.

[andrewmp6]

How did he measure the air flow differences tho?

[JDon99]

Originally Posted by andrewmp6

How did he measure the air flow differences tho?

I would assume that he was datalogging those values.

[bk2life]

Originally Posted by JDon99

Is there enough clearance for a single 5" exhaust on the 73-87 2wd trucks?

really he didnt ask for everyones opinions on what you would do. he asked if a 5" sewer pipe will fit. there is room, it'll be tight. time consuming to piece it together, but if its not lowered to much you can make it work.

post some pics.