Thread: tri -y headers

No way.

I gave up on single throttles on my personal cars.

After February I will step up to 88mm and get close to 300whp from the 2.1L.

lol, so the power would be about 240whp with a stock IM then... I cant see myself doing more than a chipped ecu and maf setup.

I would go all out for marsh cams and valve train, along with a marsh header though.

Should be about 240whp depending on what cam/intake used.

Some E85 will get thrown in the mix so it will be interesting.

This whole thread turned to shit. If you are running a stock intake manifold, you have bigger problems than worrying about what header is best. Period.

my last post on this as my tri-y is already built and i don't have a horse in this race, but to quote graham dale-jones "with an rpm limit of 8500rpm you can't exploit a 4-1 manifold to it's best" and i think he know's what he's on about.

To be honest thats you, like I stated before we spin our motors to almost 10k. Do you think thats good enough to exploit our 4-1?

jeez do you guys read peoples posts, or do you just like to blindly argue?

so please re-read my original quote and tell me where i said your 10krpm engine isn't best suited to a 4-1? would you perhaps fall into the 1% of engines on this site that spin up past 9Krpm regularly

No. I wasn't implying that was a 4-1 header. Again, that is not your average header for the 99% you speak of that should be rocking it daily driving down the street. You mentioning the BTCC engine made this really go off topic, but it happens at times. Do you know how much that designed header cost and let's see how many of the 99% that will purchase it. At any rate, some more good info uncovered in this thread

Lol,Ya know what go on wid ya bad self...

just a bit of info here. if a correctly spec'd 4-2-1 was a better option than a correctly spec 4-1 for a VE than how come the many conversations i have had with Burns on this all led back to a 4-1 for a power band from below 5k - 8500 rpms? they spec'd my header off all of my 2.4's info. i am sure the Mike K had similar conversations with them when they built his header. oh and yea that was based off the info from the IPS k20 program. both headers were designed to have big broad trq curves with good top end power as well.