Quote:
Originally Posted by wparsons
A good 4-2-1 EL will give just as much midrange bump (look at the nameless or ACE 4-2-1). You'll definitely want 3" piping the whole way back too.
I really wouldn't want to run a race car on a UEL header, the very different runner lengths could lead to different EGT's on the two heads, and can also change how much each back scavenges compared to the other (could change AFR).
|
Quote:
Originally Posted by glamcem
exactly, makes you wonder if the uneven stress on the engine could be held responsible for the cylinder 4th failures, burning coil packs ..etc and why so many people had issues with their USDM EJ engines specifically STIs (been coming with UEL header from factory) and hundreds of pages of about the failures on the cylinder 4th surprisingly it's not an issue with JDM STIs or race cars which all came with EL headers
yes the "boxer sound", the "rumble" .. but it's also known as "sound of inefficiency"
|
meh
UEL makes great power N/A with E85
and boosted with a C30-94 Rotrex with E85
UEL sounds amazing and performs flawlessly on track/race cars including my own, @
phastafrican 's , @
The Slow One 's and @
smbstyle 's cars which are all tracked heavily.
No doubt the ACE 4-2-1 EL will outperform everything, but the majority of EL headers are on par with the quality UELs based on the dynos I've observed.
Coil packs fail on both types of headers including stock. It's irrelevant. The coils cant take the heat and perform at high rpms for a long time. It's a well documented issue.