Engine/Transmission (1998.5 - 2002) How much do different exhaust mods lower EGT's?

[rspinks]

From what I can gather a full 4" exhaust ($1100Cdn) on an ETH drops the EGT's by 200 degrees F. How much drop will I see with the following options:

1. High flow muffler only ($200Cdn)

2. 4" resonator back with high flow muffler ($650Cdn)

I'm hesitant to buy the downpipe because I may get an HX40 in the future. Thx.

 

[RustyJC]

Originally posted by rspinks

From what I can gather a full 4" exhaust ($1100Cdn) on an ETH drops the EGT's by 200 degrees F.

No offense, but that's not my experience. Our ETH ran 1300 degF pre-turbo stock and with the addition of a BHAF. Unfortunately, the EZ (with boost elbow) and Jardine 4" turbo-back exhaust system (around $430 US with 5" stainless tip) were added the same weekend, but the cumulative benefit of both changes was a 200 degF reduction in max EGT's. In its current configuration, our ETH's maximum EGT is 1100 degF towing a heavy 5ver. I believe the increased airflow from the EZ's boost module and elbow (boost is up from 22 psig stock to 30-32 psig now) had as much or more impact on EGT's as the 4" exhaust.





Rusty

 

[rspinks]

No offense taken, that's the kind of input I need. I should have been more clear: right now I have an EZ (Comp no wire) and BHAF and I just installed a pyro in the exhaust elbow. How much are the 3 variations of exhaust mods (high flow muff vs. res-back 4" vs. turbo-back 4") going to lower my EGT's? If it's not significant I'll spend the bucks elsewhere.



Thanks.