Racing Beat PCM flash - PORTED engine
 

Suprised nobody has posted this.

Racing beat has a Version 3 PCM reflash for ported engines.

On an engine dyno made around 248 HP and 165 TQ.

Link to dyno graph. http://www.racingbeat.com/FRmazda4.htm

On top of porting they revised the Intake actuators and Intake Dynamic Effect Valve.

On the most powerful pull they basically through every RB part they had at it.
Intake, race exhaust, midpipe (cat delete), header, etc.

Rev limiter raised to 9500.

Wonder if they now offer a porting service.

Very cool anyhow. Nice to see such a nice dyno over stock (which is listed as well.)

They offer porting templates

^^^

Just saw that, didnt scroll down far enough on the site.

I was just about to ask what they'd done porting wise :)

Looks more like a tidy up job than anything major?

/\ if they have templates there must be a few shape changes as well

Good find. Especially that porting template. Definitely something to add the list when it's rebuild time.

I'd be interested to see a review from Easy on what rb has done relative to what he does.

That sounds like a pretty nice bump. Honestly though I would have expected more than 20hp from ALL that. I bet its crazy expensive too.

Before you get too excited you might want to research it further to make Sure you understand everything fully .....



.

Pics of the porting templates have been floating around here since SS. Cool to see RB still doing R&D on the Renesis!

248HP 165TQ engine dyno Iam not excited
Maybe Iam wrong but how much RWHP it will be ??? Around 210WHP??
It can be done with MM AP and you dont have to do porting which will not be cheap

most get closer to 195whp with the AP so 15hp due to the porting alone .
HP gets more and more expensive to get that last little bit so if you are serious , porting is a good modification to do .

If I will do rebuild I would like to have this done but alone just for it no thank you :)

And they dynoed it without cat and with their header
I wish the numbers could be a little bigger225 maybe ?
But few years ago we have like 240-250WHP with greddy so I think its still a good thing for rx8s

They mention that there was cleanup porting on the stock plastic intake manifolds as well. I need to investigate this I see, as I am having my build ported.

this sounds perfect for what i have in mind for my car. i guess i should check in with RB more often.

*added to "to-do" list*

It's the gain over stock that is important. Can't scale very accurately, but it looks like 25 HP and 20 FT/LBS of gain over a stock setup.

Which means we are finally back to where Mazda said we were supposed to be when the RX8 first came out. :(

Which a number of people have already exceeded without it ;)

Agreed. I picked up on that too. I'm not sure I can see what the porting itslef does in their example.

It changes the area under the curve.

IMO porting will provide that last bit left internally when allowed (racing class) or wanted (street etc.). However, I'd have it performed by one of a very few select engine builders, which will only be provided with an engine build rather than a stand-alone modification.

i havent read the site---do they doing anything with the exhaust ports?
OD

exactly what teamrx8 said^

Yes

if they could take the jet air nozzles out of the lim they would gain a little bit more
the lower intake can stand some clean up also
Nice little bump
get the rotor clearancing at the same time and the modified oil bypass to up the pressures as they did?
i dont like the 9.5 k redline for a street car.
OD

Right. But it's comparing stock to: porting+intake+optimized exhaust+reflash tune.

I'm not sure how much the porting contributes alone. It would be nice to see an optimized tuned motor before and after porting comparison

EG: intake+reflash tune+optimized exhaust vs. porting+intake+reflash tune+optimized exhaust.

That would be the most valuable comparison to me.

edit: paging through their site they do have one showing the engine hitting 225bhp fully modified vs. their ~245bhp or so with the porting. That's a nice bump.

bingo

Our professionally built motor with about 100% new parts runs 270 peak flywheel hp ran on Motec at .90 Lambda, 90 psi oil, 185 water and oil T F. On good high octane pump gas. Header, stock intake, -11 plugs, aftermarket ignition which allows for nuts on tuning.

This same motor makes approx 219 rwhp on a dynojet when drivetrain is fully warmed. 5th gear. This equates to approx 19% para drag and/or drivetrain loss.

I would kill to see any details about a ported motor. Everything I've heard is that it's trouble and all you get is 5-7 hp max with less reliability. Please advise otherwise is someone has facts/data.


Engine dyno: http://gallery.me.com/meyermotorspor...&bgcolor=black

If it's the black plastic upper intake there is very little opportunity that I can see. These motors do not like VOLUMES of air. They like VELOCITY of air.

It is unfortunate they are so many new variables added in this comparison. You could make an argument that the exhaust made the additional power.

Not a apples and apples test.

Geeshh---can't anybody share some before and after ported motor info????

I agree:A lot of people don't realize how much port timing and volume the stock renesis has. 220 flywheel hp was possible with street port 13Bs back in the day (Maybe 10-20 more occasionally). 270 flywheel is like bridgeport territory.

Monkeying around with the ports is not nearly as good an idea as many of the other things that you have done. It is not hard to make ports that will have adverse effects on side seals, especially on the renesis.

Paul.

Hey Paul, I would like to investigate the RB templates for our project. I would love to see the side seals given a break from the constant hammering they have been taking.

For what it's worth I will have a dyno comparison between a stock turbo Renesis with my current mod list and a half-bridge Renny with Esmeril seals. The only things I will be changing initially are the motor itself and upgrading the clutch. That should give a decent enough idea of what porting actually does for a FI car anyway.

Excellent. Do we believe that the BEFORE motor status had good compression, low miles, etc., etc., etc.? I guess what I'm asking is are we comparing a turbo so-so motor with a 1/2 bridge turbo rebuild using new components, seals/better compression, etc., etc.,???

I'd be interested to know more about any of this 1/2 bridge stuff if you'd like to share and keep it confidential (or not):

meyermotorsports@mac.com

you going to measure the egt's doing this?
lets see if the porting can have any affect?
OD

Damn, I'm going to have to go looking for another 3bhp now :mdrmed:

Eric, thats a really good point actually. I do have compression numbers for the motor I have now and they aren't bad, but doubtfully up to the compression of a newly built motor. Truthfully its going to be very hard to get an apples to apples comparison between a half-bridge and a stock motor both freshly rebuilt with close to identical compression.

No worries about confidential secret stuff... I'm just learning as much about this stuff as I can. The modifications on the motor are largely coming from recommendations by Brian@BDC who is building the motor. We've discussed a lot of potential changes to the motor, especially various apex seal options and I've settled on the Esmeril seals despite some reservations about lack of long term wear data etc. The intake/exhaust porting on the motor will be relatively mild, mostly cleanup work from what I understand, but the half-bridge is something Brian has done on a couple of other Renny motors now and was comfortable doing for mine. If you need the exact specifications on how he is doing the porting I would recommend dropping him a PM.

I might be able to do an apples for apples dyno comparison on my partially ported motor .
I only cleaned up the intakes but did do some massaging of the side exhaust ports ....

The one thing I've noticed so far is a nicer exhaust tone at high rpm . I originally thought the motor was flowing more air but I eventually traced that back to an intake leak at the turbo that I must have had pre rebuild .