Are theses engines worth building currently have a 04 4port auto that’s ready for a rebuild but I have a few options I’m considering and I’ve noticed there’s a pretty big torque difference between 4ports & 6ports also could I hybrid build or pp a 4port ? From my understanding 4ports handle boost better as well

 

you don’t have any understanding at all as indicated by your mentioning hybrid and PP.
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Torque will come on sooner with a 4 port vs a 6 port due to less intake flow but higher velocity, not necessarily more. (Someone can correct me if I am wrong here)

Also most people that turbo a 6 port leave the additional ports open due to tuning difficulty. So that additional torque gain is usually due to this. Suggest you hop on over to the turbo build threads. Loads of information there to get you up to speed one what it would all entail.

 

I was going if a kmr video of him porting a 4 port and he had mentioned applications in a peripheral port build is why I ask that question basically is there any gain in adding the additional exhaust ports even tho your lacking the additional two intake ports

 

I will definitely check out the turbo sub forms but My intent is to build the engine in preparation of turbocharging in a about a year or so

 

Quick and dirty answer; NO. Low end power is gone, and the upper rpm does not benefit from the additional exhaust flow volume. AKA the exhaust ports are not the restriction everything thinks they are for the renesis. At least not until high HP applications. Hell Landspeed was able to achieve 600whp+ with the renesis, this was a completely unstreetable setup though, probably not even road course-able as well.

 

If by 'handle boost better' you mean 'make way less power' then yes . You basically need to run another 4-5psi to keep up with a 6 port. Do that safely with high octane fuel and you could have a decent powerband ...however the Auto trans would blow well before then.

 

hold up tho cause my bolt on 4 port dynos at 202 ( air pump delete ported throttle body weapon r ram intake with duct work mishimoto thermostat hks spark plugs ngk. Wires oem coil packs straight piped and a governor delete

 

So thro the 4p in the trash ?

 

Yes basically. Mazda did. Whatever you do to a 4p will produce more bang on a 6p. I'd be curious to see the curve of that 202 dyno.

 

None of that makes any power ............... possible exception is the straight pipe but the only way you are getting 202 is at the flywheel.

 

Now this is with the automatic 4 speed transmission.... but this pretty much shows you how gutless the 4 port will be compared to a 6 port. Video is mine of my original Rx8, and I had every single bolt on imaginable (minus turbo or supercharger, no nitrous, but basically every available bolt on) and still only made 150 wheel hp at 7,300 rpm and 124 ft-lb wheel torque at 4,900 rpm.

 

he’s merchandising people who have no understanding. Some people will sell anything for a buck because you asked for it rather than telling you the truth and declining your money. Search this forum and you’ll find that porting not only doesn’t benefit this engine, it often decreases performance.

Otherwise where are the dynos from him or his customers showing anything better than stock power levels? There aren’t any, and for good reason.

wake up and start educating yourself; not intended as a slam or condescension, it’s just the cold, hard truth. but men love darkness (lies) more than the light (truth), because they either can’t bear the painful reality of it or their pride, vanity, and arrogance keeps them from accepting it. There’s no shortage of it on here no different than everywhere else.
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