RX-8 N/A Engine Modification
 

I have 2008 Rx-8. My current mods are Re-amemiya header and Amuse catback exhaust, HKS Racing Suction. I want to have more HP on my car without having turbo. Only N/A Mods. What are the full lists that I could add to it?

The only significant hp gain as n/a is engine swap.

BS - it has been proven time and again that the most significant hp gain is from the search engine .

You should do a research on the board.
Power wise on a NA car you could switch back to the stock intake or get an AEM cold air intake, remove the catalytic converter or replace it with a sports one.
Better coils, fresh plugs, lightweight flywheel should also help. Get an accessPORT.
There's not much that you can do.

well that as listed above and some heavy engine work which will cost > then going FI.

If you wanna stick with NA and willing to pay $$ a whole new world opens up :P

Ported & polished and stroked & bored... well, at least ported and polished. ;) But as cited potentially more costly than going FI.

The most cost effective NA enhancements are:

CobbAP with a MazdaManiac tune.
BHR Ignition system
High-Flo Cat (e.g. RP SuperCat)
eBay Chip (j/k)

thread moved

Porting would cost you $500~$700, and the access port would cost you $600 with MM's tuning. That's a good bit less than FI, porting is pretty unproven ground until I can get my motor together and dynoed. Even mine wont stay NA unless by some ridiculous miracle I got 300+ HP (not happening).

I think the most you could hope for NA if you just had money to waste would be 250~260 HP tops. If you are realistically looking for more than about 220 HP, you'll need FI.

If you are porting a running motor then you need to add in the rebuild costs that go along with it.

So do you recommend that he swap in a search engine? ;)

Ken

tuning.
tuning
more tuning

Attachment 259737

This is the best engine swap. I recommend it.

A Cold Air Intake would be where I start first. That will easily net you 15 to 20 extra HP.

You should get a new Cam. Maybe even some new valves, since the ones that come stock with the car are pretty brittle, and don't handle the extra HP your new CAI is going to add.

Putting Octane Booster in your gas tank *up to 103 Octane...* has been proven to increase 5 to 10 HP on the dyno. Very cheap extra HP if you're going to the drag strip.

With those starter mods, you should be getting to the mid to high 13's easy.

I loled at the CAI easily net you 15 to 20 extra HP for the Rx8.

Are you joking, smoking, or doing both? :P

Kafka, I'm pretty sure he's being sarcastic.....you don't put CAI with those gains nor octane booster with those gains and not be joking.......

:uhh:

You need to enable that hidden VTEC option in the ECU. It adds another 30 hp to the Engine.

Get in your car, close your door.

Turn your key to on , do NOT start the engine, then off, repeat this for 3 times. (leave key in ignition)

Then open and close your door for another 3 times.

Turn your key to on again

Then turn your radio on (if you dont have stock head unit, put it back on) and tune it to AM 1480

Turn it off.

Then Turn your key to on and off again,

Get out of the car

Close the door,

Press lock on your remote

Go into your house, find that packet of Koolaid you brought when you were 5, mix it with warm water, add ice, drink it

Congratulations ! You just enabled that VTEC function in your ECU !

Now you can proudly tell the Honda guys that you just got another 30 hp by ...

VTEC JUST KICKED IN y0!

LMAO you guys are so mean!!! lol

you have a header which is good. just get your self a good mid pipe, a bhr ignition upgrade and a AP from MM and you will be more than satisfied.

and next time dude search!!! or else you will get teh sarcasm on ur threadz

We only charge $299 for porting alone( no rebuild ).

http://www.turblown.net/store/index.php?productID=88

Its always been hard to make a LOT of power being n/a. Most guys go the nitrous route..

Just out of curiosity what type of results do you usually see with mild porting?

rtjhe:
why must you CONTINUE to always create multiple threads about the same thing? :banghead:
Do you realize that is against the Forum Rules ?

Hopefully a mod / admin will assist.

Threads Merged

rtjhe, don't start multiple threads about the same subject. Read the RX8Club Rules.

And there you go... a cheaper option.

which search engine gives the most power?

I've heard from creditable sources that there isn't much that can be done as far as porting the Renesis engine due to the proximity of the water jacket. There is power in the N/A as shown by Eric Meyer and others but it takes time and often a little engineering.

PS: if ya want some real N/A power, P-Port the engine :p tho some re-working of the EFI system would be in-store or a switch to a nice Weber downdraft.

just go FI you know u want 2