rx8miami

Does anyone know of anyone or has personally experienced the headers that Amemiya has put out recently for the 8? If so fill me in, I am considering buying them but they are quite steep but hp costs $ so I may be willing considering the gains. Please chime in if you have any type of info. Thanks as always to the best car forum on the net!

pcldletter

I was thinking of having a set custom made by one of the best, but I heard that headers don't do much if anything for a rotary. Wonder if there is any truth to that.

epitrochoid

headers do plenty for a rotary, but none on the market do much for a renesis

this has been covered at length recently, try a search

therm8

Quick question about the 4-port motor:

I know that the siamesed port in the 6-port engine leads to complicated header design for decent power gains, but am I correct in assuming that the 4-port motor would not have this problem, and a more conventional header design would work? Learning as I go here .

billy19usa

I would wait till Racing Beat comes out with their header.

wakeech

ok, again, search. please stop attatching value soley to brand names without knowing how or why a product would be worth what you're paying for it. thank you. that kind of mentality is tolerated only in the "aftermarket" section (which is why i seldom frequent there).

the 4 port motors still have the siamesed exhaust ports in the intermediate housing, and this is the reason that the tuned length headers which Amemiya has produced and certainly other companies will produce won't be very effective: the middle runner is the wrong length. for intimate technical details consult rotarygod's writings.

don't worry about a header, especially when:

A) it's after a list of other things which are cheaper and more important to change with this motor if you're looking for power ...

and...

B) when they're largely ineffective as it is anyways.

waste of a few hundred dollars. get a canzoomer instead.

rx8miami

Thanks for your insight Wakeech but maybe I'm old school. I think that after a few respectable companies get a try at good, fluid headers for the 8 the hp/torque gains from them coupled with free flowing exhaust will outgain the cz. The canzoomer gains have yet to be proven on dyno runs but only with g-tech. I will be honest, I never owned a rotary before the 8 but I do recall tuners in the 80's squuezing out lot of gains from headers and exhaust. It is true that the new 6 port design may be more difficult to improve upon but I think only the test of time will tell. Don't get me wrong, I love the fact that $600 will get you a 30 hp gain with CZ but it still looks too good to be true until I am proven otherwise. All in all thanks for your input.

Gord96BRG

Did you do a search here for the Amemiya headers as suggested? You'd quickly find that $900 that get's you a 0 hp gain proves that, so far, the name does not buy you any HP. They rushed something to market that is, essentially, worthless.

Factory engine tuning is much more advanced than it was in the 80s - for performance tuned engines, the manufacturers have left much less on the table for the old standard intake and headers to gain. Further, without ECU tuning (a la Canzoomer), even if you could improve the breathing in and out, you won't make much more power.

Regards,
Gordon

rx8miami

Well, as matter of fact I did. The thing is a few of the posts mention 2-3 hp gains and some say 0. RB's site claims the same as the former for headers that they will soon come out with. I think that you are absolutely right about the fact that it seems the companies which have produced headers for the 8 show no gains but hopefully this will change in the future. But the same might hold true with ecu upgrades in the near future. The CZ mod may be the only respectable upgrade out there presently but in short time RB and others are putting one out as well. Will they prove the CZ outdated? I guess we shall soon know.

wakeech

this is why Maurice is very on top of things, where you can download new codes for your piggy back, not to mention he's developping a computer with near stand-alone capability.