Hymee

iTrader: (1)

I never said it had no oil cooler. It does. No one has picked it yet. It does make an appearance in the first photo, and there are some hints about it in the second.

Cheers,
Hymee.

Hymee

iTrader: (1)

I already explained that. This is a two rotor engine. There are 3 exahust ports. The front exhaust port (header pipe) handles exhaust only from the front rotor. The rear exhaust port/pipe handles exhaust from only the rear rotor. The center exhaust port is siameased between both rotors. That means the duty cycle for the exhaust gasses in the middle tube is twice as long as the front and rear - hence the pipe gets exposed to the hot gasses longer, and heats up more.

The shape is as fitted to a test vehicle about 2 years ago. It ran a 13.0. It wasn't an RX-8, so less attention needed to be made to fitting it in. The only other one I can think of that I posted pics of is Wildcard's headers, and these do actually fit the RX-8 without modification to any engine mounts etc.

Cheers,
Hymee.

Hymee

iTrader: (1)

What - you think I am going to give away the farm? Hehehe.

Cheers,
Hymee.

Hymee

iTrader: (1)

I beg your pardon.

guitarjunkie28

because it has twice the exhaust pulses running through it. the other ones only see exhaust from their rotor, while the middle sees it from both rotors.

Red Devil

All this talk of hp numbers and speculation. All I want to see is how much extra we can put down reliably and just what can that do for us in the 1/4 mile. I'm not interested in drag racing my RX-8, but getting a baseline type 1/4 mile figure or trap speed tells me more than any hp numbers.

rotary crazy

what I love to see is a tuner like you hymee try to extrac as much power as posible keeping the engine NA and without briged porting, but doing everything else, header , porting, intake, fuel mods, anything that you can do.

Nemesis8

iTrader: (3)

So, the 14 HP and 7 FTLBS is not for headers that fit the RX8, right? Will you dyno Wildcards headers then?

Brice-RX8

The 238 and 232 numbers that Mazda provide are different testing requirements. They have always been the same but since the new requirements alot of manufacturers have seen their numbers go down, some up. So, my 04 has the same amount of power as an 06, be it 238 or 232, whichever way you want to look at it.

Asmoran

^^
Then do some porting, then add your SC :D

You've got all the money in the world, don't you? :p

Richard Paul

iTrader: (5)

Well without finding my glasses and since you really want someone to find it I'll guess and say the following. A small oil cooler droped into a bucket of water will boil the water and keep the oil temp at 212f. As long as you keep replacing the water that is.

In practical terms you can put it into the well where you dump the dyno water.
Or intercool it with water feeding the dyno.

Tamas

iTrader: (1)

So, when are these going to be available to the general public and for how much? Do they offer the same gains?

Oh, and one more thing... will they be CARB-approved?

Philip_SA

Hymee,

thanks for all the info, it is great.
(I didnt check the vid yet, will download later)

I think our guys just want to know on that siamese center header pipe if it is split in the centrer (two smaller pipes into one, or one big one(looking on the inside of the pipe)) and then header lengths. same length or not? (all 3).Not your whole secret just right direction.

I know someone here by us played around with the headers a bit and didnt gain too much(actually very little) the big gain was in the rest of the pipe, 3" with no cat and big silencer at back or two small ones, this was the best call.

Thanks

Philip_SA

Just a thought

In 1991, the Mazda 787B, 4 rotor peripheral port motor, with that technology(15 years old) made 700HP on the flywheel.

OK it was a real works motor, but truly possible, I think now even more.

cleoent

So let me just get this straight...

In 2003 the RX8 supposedly had 250 BHP
In 2004 the RX8 supposedly had 238 BHP
In 2006 the RX8 supposedly had 232 BHP

but for realz this entire time it has about 210 stock? WTF mates? How can a car company do that and get away with it?

Animagix

=/ man that is gay... now i gotta tell my friends that my car really got 210bhp.

Renesis_8

Since you have over a thousand posts, i assume you know the reason behind the change from 250 to 238 to 232...

My best guess is Mazda used an engine that put out power within the limits(4%??) of the test, so they can advertise it as 232.
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cleoent

3-rotor rx8 would be sick. I think this is where mazda needs to go in the future with RX line if they want to remain competitive.

ineed2jump

Doesn't anyone understand a baseline? You've got the car; you know how it drives; so the number doesn't mean much anymore. The only question is how much do the changes you make effect the engine you have. Thanks for doing it right Hymee.

rotary crazy

that is the problem, there has been engine's that dyno in the 200+ rwhp range and engines in the 170 rwhp, so there is a really large discrepancy ( hope I spell that right) from engine to engine.

rotarygod

^ The really strange thing about that is that the Formula Mazda cars all run factory built Renesis engines that are no different than the ones in the RX-8. They are extremely consistent there in the power department.

rotary crazy

^that is?

guitarjunkie28

but i wonder if they check all those on the same dyno before they're installed...

one guy over here does a run on a dd in 100* weather on 91 octane, while another guy does one on a dynojet in 758 weather... coolant temps, the traction control stuff, etc etc etc etc... i think the engines are more consistant than the dynos lead us to believe.

Hymee

iTrader: (1)

You gotta read the posts again. It was more than 210, the correct answer has been posted. But that was our engine, on our dyno.

Cheers,
Hymee.

Hymee

iTrader: (1)

Thanks mate. And thanks for using your first post to show your appreciation. It also shows you have a good understanding.

Cheers,
Hymee.