What do you guys think of these headers?-wtb headers lol

[sultan]

shop around. i just sold an up-pipe for $25. I bought it with a set of std headers, that I got for $40 off trademe.

[slystiguy]

Will keep an eye out thanks for that info.

unfortunately it all turned to shit today an is getting abit demoralising all round.will update this on my other topic if any of you are following it

[Simon C]

PM me your e-mail slystiguy. I have an article from a US magazine directly comparing lots of different header designs from major tuning houses, back to back with dyno runs and in different stages of engine tune.

[Guest]

Speed, Style, & Sound Magazine ?

[BC5RA]

 Simon C said:

PM me your e-mail slystiguy. I have an article from a US magazine directly comparing lots of different header designs from major tuning houses, back to back with dyno runs and in different stages of engine tune.

Why not just post it on here for all and sundry.

[Simon C]

Yeah, that's the one. I don't have the URL for it, just a copy of the PDF. Took me ages to find it last time. If anyone knows the URL, feel free to post it up. From memory, the stock system spools very quickly but loses out at the top end. Most of the headers designs are within ballpark of each other, with various design features accounting for the differences.

[Guest]

http://wrx.grapon.com/exhaust/headers/wrxheadertest.pdf

Its a bit flawed the test but as good as anything about. There are issues with boost control which make the results biased. If you can look through that it does show some interesting results.

[Guest]

This is an interesting test - Tomei unequal vs Tomei equal.

Unequal spools up quicker due to shorter pipework and has a broader torque curve

Equal makes a higher peak figure

[Simon C]

You're right, there are certain biases in the testing. What would be really interesting is if they'd measured the pipe diameters and other quantitative aspects of the headers, not just listed the brands and the obvious design characteristics (4-2-1 vs 4-1, etc). There are a lot of other factors involved with how a header will perform, it would have been a great opportunity to get some further insight into it.

[Guest]

Yes very true