KZJ78 Dump Pipe

[Lenny33]

Sweet! Thanks! I just ordered my pipe yesterday.

good luck and have fun!

 

[kzj78dp]

For all of you who have gone to larger dump pipes, did you end up putting back any type of heat shield/radiant barrier like the stock setup? Not much space to the cab firewall as is (and I think you need ~3/4”/20mm air gap for these to be effective). Or, are you just running without any heat shield, and everything is fine?

 

[kzj78dp]

This is what I made, Remove the old dump pipe and this one fits back in to the original system.

View attachment 1855467

View attachment 1855468

also, @oldblue when you just enlarged the dump pipe but tied into the original smaller exhaust back, was there

a noticeable difference in power?
Lower EGT’s?

Is there some benefit of just enlarging the dump pipe without doing a larger exhaust all the way back?

Any others have experience with just enlarged the dump pipe without upgrading the rest of the exhaust?

 

[coldtaco]

I don't have any experience with what you are asking but logic would seem to be that you would not get a reduction in EGT's from a larger dump pipe if you keep the factory exhaust. I don't know if there would be any other benefits to doing this.

 

[TheEngineer]

your EGT will give better info if it is installed upstream of your turbo.. I actually left in the stock downpipe, and installed the 3" exhaust as in the pics.. one bend & about 6ft in overall length.. I installed an O2 bung for Lamda sensor.. I am going to be installing a 2nd EGT sensor to measure system heat loss.. the lower the heat loss the more grunt & better "sweep" of gases thru head
View attachment 1981243View attachment 1981244View attachment 1981245View attachment 1981249

Is there any drone with this setup at highway speeds? Looking to do a similar exhaust on ours. Do you remember what it cost as well if you don’t mind sharing? Getting a quote this week and not sure what to expect since it’s not a stock length system.