if so how much hp gain is it? i got someone that says they will do it for me for 3000 and i need to know if its worth it

if so how much hp gain is it? i got someone that says they will do it for me for 3000 and i need to know if its worth it

Spending $3000 to port a renesis is definitely not worth it. If the engine were already apart due to some other failure then you could begin to think about it. The renesis is incredible port timing in stock form and not much can be accomplished. Lack of knowledge and experience porting can do great damage to your engine through increased wear of seals.

Paul.

Listen to Paul, he's a very valuable member of our Rotary Community and know his stuff!

With that said, $3k for a porting job is crazy. I would imagine most of that cost is going towards the labor to remove / reinstall the engine. Definitely not worth it if your engine is good working condition.
I know of two members here who have ported their cars (there's probably more). Phil's8 was ported after he blew his 1st engine. (4 port supercharged A/T)
Charles R Hill rebuilt his engine and had it ported while it was out. His dyno figures were quite impressive. (approx 213 hp), second closest to him that day on the dyno was mine at 203. 10hp for 3k. you decide...

Listen to Jedi. The force is good with him it seems :).

Paul.

Definitely not worth the money or the trouble of pulling the motor.

In addition to the two jedi mentioned, I believe there is a BB turbo 8 that had his motor ported. Also there is someone on rx8web.com that had his motor ported but no details yet.

There is a video on youtube of a ported renesis. They claim 263bhp.http://www.youtube.com/watch?v=LkKw72dZ2yc&feature=related

Here is the video of the engine on the dyno.http://www.youtube.com/watch?v=KQL45DYgIFw

There is a video on youtube of a ported renesis. They claim 263bhp.http://www.youtube.com/watch?v=LkKw72dZ2yc&feature=relatedThat is a custom peripheral port engine. It's not really a Renesis. It did start life as a reny.


Didn't guitarjunkie28 & Judge Ito do some engine porting?

jedi AGAIN! :banghead: how am i supposed to hit 3k post with you on this sh*t all the time:boid:

Listen to Paul, he's a very valuable member of our Rotary Community and know his stuff!

With that said, $3k for a porting job is crazy. I would imagine most of that cost is going towards the labor to remove / reinstall the engine. Definitely not worth it if your engine is good working condition.
I know of two members here who have ported their cars (there's probably more). Phil's8 was ported after he blew his 1st engine. (4 port supercharged A/T)
Charles R Hill rebuilt his engine and had it ported while it was out. His dyno figures were quite impressive. (approx 213 hp), second closest to him that day on the dyno was mine at 203. 10hp for 3k. you decide...

Well the thing is with both Ray and Phil, they had the motors out already. If you have the motor out of the car and are having someone work on it, it seems silly to NOT port it. I'm already budgeting for a future rebuild when my engine gets old enough or I blow it to pieces with boost, and when it gets rebuilt it gets all the goodies. I would also imagine the porting Ray had done will be more than 10 HP with a FI 8.

Spending $3000 to port a renesis is definitely not worth it. If the engine were already apart due to some other failure then you could begin to think about it. The renesis is incredible port timing in stock form and not much can be accomplished. Lack of knowledge and experience porting can do great damage to your engine through increased wear of seals.

Paul.

correct.

and ray is the only one i know of that has a ported engine running..

but paul.

i have a spare motor. and your guy is the one to do it. :)

beers :beer:

Pettit seems to offer some porting services along with other reliability mods...


I've been looking as my engine is about to shit the bed any month now. No reason not to port the engine if its being rebuilt or replaced. I wish there were more options out there :eyetwitch

port --- yes, if your current engine is bad and gonna have to take it out "any way"

but 3 K for a port job? oh hell no.

correct.

and ray is the only one i know of that has a ported engine running..

but paul.

i have a spare motor. and your guy is the one to do it. :)

beers :beer:

Phils8 is running. The porting I did on that one wasn't that much of an increase in volume. They are larger but more than anything it was a smoothing of the flow through the port. MAzda leaves some shrp right angle cast points in the ports.
As was stated if your going to do this the gains for the cost are not the greatest. If you have the engine out being rebuilt. Then it would be more cost effective.

I like these posts.

After college if I still have my 8 and can afford a daily driver. I'm considering getting a rebuilt renny then porting it. Then FI. So that's make take. I would not have the engine pulled out just to get ported. But if i plan to get a rebuild because of my 8s age. Then i see as a minor amount of money.

Just my $.02

I like these posts.

After college if I still have my 8 and can afford a daily driver. I'm considering getting a rebuilt renny then porting it. Then FI. So that's make take. I would not have the engine pulled out just to get ported. But if i plan to get a rebuild because of my 8s age. Then i see as a minor amount of money.

Just my $.02

re- read the post above you - this man speaketh the truth .
FI adds so much to this engine without any other mods .
On the other hand if you were thinking of building the badest FI 8 out there then porting would help you get there .

If someone isn't a rotor head then I would never drop my car off with them. Specially if it was along the lines of a 3k dollar job.

Just use that 3k to go towards some boost and you will be much happier.

The interesting thing about where a Renesis sees benefits from porting; it happens in areas of the torque curve that nobody seems to care about or wants to discuss.

people only care about peak hp because that is what has the wow factor - something you call skite to your mates about . In reality increasing the midrange torque would make the 8 much better drive than just adding 10-15 at the peak .
How much mid range did you end up getting ?

Don't forget Racing Beat can do porting.

Don't forget Racing Beat can do porting.

Absolutely. Jim Mederer is one of the sharpest men EVER in the rotary game. He ranks among a VERY small group of builders :eyetwitch. He doesn't do most of their porting any more but I'm sure has evrything to do with their design.

Paul.

Paul - Can you order from Mazmart a renny with any kind of porting?

Paul - Can you order from Mazmart a renny with any kind of porting?


Rick has done a lot of port experimentation on these motors and can definitely provide that option. One of my issues with it is that the stock ports are HUGE already. These motors make 250 to 260 flywheel hp without port work and I've even heard of more. I hope to be introducing some really neat internals soon, like some new seals for the renny that people should find beneficial.

So yes, we can. More to come......:eyetwitch

Paul.

^^^ tease.

His seals will make the renny run cooler like the pump and thermostat.

Mu ha ha....

Rick has done a lot of port experimentation on these motors and can definitely provide that option. One of my issues with it is that the stock ports are HUGE already. These motors make 250 to 260 flywheel hp without port work and I've even heard of more. I hope to be introducing some really neat internals soon, like some new seals for the renny that people should find beneficial.

So yes, we can. More to come......:eyetwitch

Paul.

wait what.

i'd like to see a dyno or a video. with accepted calculations, the 04-08 renesis engine makes ~215hp at the flywheel. i would love to see evidence otherwise.

wait what.

i'd like to see a dyno or a video. with accepted calculations, the 04-08 renesis engine makes ~215hp at the flywheel. i would love to see evidence otherwise.
I'm pretty sure he is talking about engines with modified internals - could be wrong .....

Mine was from Autoexe ( http://autoexe.co.jp/SozaiTopPage/indexKinoubetsu.html ) and it just blown. All seals are good. Suspected something got into it and cause the damage. As I'm not in the country at the moment, so I hope my friend can snap a few pics of the engine pieces for me and let me upload here. But can't promise anything till I receive the email.

Would love that option if my engine fails, it would probably be cheaper to get a ported supersmooth engine from the US than to get it rebuilt here.

But I also wonder why there's no 3 rotor rennies. Isn't it like legos? :D

Rick has done a lot of port experimentation on these motors and can definitely provide that option. One of my issues with it is that the stock ports are HUGE already. These motors make 250 to 260 flywheel hp without port work and I've even heard of more. I hope to be introducing some really neat internals soon, like some new seals for the renny that people should find beneficial.

So yes, we can. More to come......:eyetwitch

Paul.

Paul, while the stock ports are huge and have excellent timing i think that there is more to it than just "porting". Smoothening some angles in the intake ducts instead of brutal porting leads to some good results. I believe that Charles R. Hill and rotarygod can understand what i mean. Then there are a couple of reliability mods that can be done, like working the oil inlets (do you call'em so?) etc.
There's not much power to be gained but all in all some more reliability is always a plus if you have to pay from your pocket :)

Would love that option if my engine fails, it would probably be cheaper to get a ported supersmooth engine from the US than to get it rebuilt here.

But I also wonder why there's no 3 rotor rennies. Isn't it like legos? :D

there is one 3 rotor rennie built in england by Carl Hayward of www.mazdarotary.co.uk

http://www.rx8club.com/showthread.php?t=141000

he's a member http://www.rx8club.com/member.php?u=43078 look for his threads for videos.

but its a long way from just stacking it like leggos because of the port configurations

I believe that Charles R. Hill and rotarygod can understand what i mean. Then there are a couple of reliability mods that can be done, like working the oil inlets (do you call'em so?) etc.
There's not much power to be gained but all in all some more reliability is always a plus if you have to pay from your pocket :)

Paul knows what you mean too. ;) The oil inlets and such are what they worked on first over there at MazMart. Rick Engman knows more about rotaries than just about everyone on the planet and he's the one doing the work:). Paul is no slouch either:D: As far as not much power to be gained...

Well if you consider that some have engine dyno'd the renesis at less than 220 stock and then there are modified NA rennies engine dynoing at 250-260 thats a difference of 30-40 hp at the crank. i think 40 extra at the crank is more than "not much"

Paul knows what you mean too. ;) The oil inlets and such are what they worked on first over there at MazMart. Rick Engman knows more about rotaries than just about everyone on the planet and he's the one doing the work:). Paul is no slouch either:D: As far as not much power to be gained...

Well if you consider that some have engine dyno'd the renesis at less than 220 stock and then there are modified NA rennies engine dynoing at 250-260 thats a difference of 30-40 hp at the crank. i think 40 extra at the crank is more than "not much"

nexib might also want to consider Lasse Wankel here, a swedish rebuilder that is doing several ported 13b msp engines these days :) Not because i don't trust the guys at Mazmart (how couldnt we all? :) ) but because of distance.

The only 260hp-is ported renesis that i saw was a peripheral port one, have you got links to see simply ported side exhaust engines too? That might be really interesting! For what i recall Charles is putting down lower numbers at the wheels so i'm not sure of that conversion @ the crank.

Thank you for the infos anyway, i love these kind of threads!

The Renesis with completely stock internals that is well tuned running on high octane fuel (98 or higher) can hit about 230 rwhp or so max. Can being the keyword. That equals roughly 260 fwhp or so. The '09 engines for some reason have been reported to be capable of more.

What the engine "does" from the factory and what it "can do" are not the same thing. Paul knows good and well what that engine can do.

Can you please further enlight us?

nexib might also want to consider Lasse Wankel here, a swedish rebuilder that is doing several ported 13b msp engines these days :) Not because i don't trust the guys at Mazmart (how couldnt we all? :) ) but because of distance.

Yeah, obviously a good option, especially as he builds on his 8 experience. Depends on the price, still not an issue I hope to get (a broken engine) :)

This man just might know his stuff when it comes to rotaries.

Paul.

that is beautiful on so many levels!

Can you please further enlight us?

In what way? Stock engine, stock air filter, free flowing exhaust, lightweight flywheel, upgraded coils, 98 octane fuel, and some damn good tuning (this being the secret). Stock rpm limits. That's it. It can do it.

omg

Still have no dyno figures on my stage 0.5 mild streetport Renesis. As you might know i'm am not the fastest guy when having a project engine (or header) to test:banghead:My project 300 hp Rensis is awaiting bigger secondary injectors and today came the long awaited Accufab 70 mm tb. I have my stainless dyno header finished and shall also black coat it with 1100 C ceramic. The Vi-Pec stand alone system shall be fitted and some other things:) But... i have 10 customer engines to do with 4 of them goin up on the Super flow dyno, so Renesis project will hopefully be dynoe'd in June:banghead: I also have a customer Renny that has stage 0.5 streetport and 2 pin dowling for F.I in the future. The lower intake is also ported:eyetwitch.It shall be compared with my stock port RX-8 and have same Unichip piggyback and 2.5" sport exhaust. Further plan is BHR ignition kit and E85:Eyecrazy:

/Lasse

In what way? Stock engine, stock air filter, free flowing exhaust, lightweight flywheel, upgraded coils, 98 octane fuel, and some damn good tuning (this being the secret). Stock rpm limits. That's it. It can do it.

Ok then, i got yout now :) I thought you were referring to some work with stock internals.
Thank you for the clarification!

hey i stood in that room and looked at a renny with a towel over it that was hiding direct i i dont know what because of that towel....

who said "direct injection" ?

hey i stood in that room and looked at a renny with a towel over it that was hiding direct i i dont know what because of that towel....

What are you talking about? What room, what towel :uhh:?

Paul.

Not much detail but hopefully more to come. This guy is ported with FI and has claimed to put down 368 whp. I requested more info so hopefully he responds soon :)

http://www.rx8web.com/forum/showthread.php?p=184369#post184369

oh yeah that was a dream i had....

Not much detail but hopefully more to come. This guy is ported with FI and has claimed to put down 368 whp. I requested more info so hopefully he responds soon :)

http://www.rx8web.com/forum/showthread.php?p=184369#post184369

he is running a Procharger blower . Rotormaster in Aussie has run the same thing at similar WHP (very peaky). Will be interesting to see his dyno and compare all the same .

What are you talking about? What room, what towel :uhh:?

Paul.

yea,

lots of cool stuff in that room that does not exist.. :lol:

denny and i could not figure out what that stuff that is not there was! :)

btw, that was a very informative day. thx paul.

beers :beer:

star mazda - same engine, different tune = 250hp

star mazda - same engine, different tune = 250hp

Well that might take less drivetrain losses into account too!
Anyway, something that i like about ported rennies is that the bevels (thank zoom44 for that term! ) on the ports, when present, help reduce side seals wear. Not too much but they do it.

the race rx8s, in the koni challenge, do about 250-260 @ the flywheel. they all have about 220-225whp.

which is what teamrx8 got as well. so yeah, that's totally possible without porting. teamrx8 did it with an intake, header and 3" exhaust. he even had a high flow cat.

Yeah, obviously a good option, especially as he builds on his 8 experience. Depends on the price, still not an issue I hope to get (a broken engine) :)

I know that lasse already have ported a few Renesis and the price tag isn't bad either. Its the labor cost for removing engine and re install it that will cost.

EDIT: Missed lasse's post in the thread already, it explained it alot more then mine ;)