The Greddy kits running closer to 300whp were running nearly .8 to .9 bars peak... and then back down to .6 bars at redline.

 

OK that explains some things

You are talking for 0.9 bar I am talking for 0.6 and then back down to 0.4 bar at redline.
I believe you know what that means, it’s a huge difference from 0.6 to 0.9
And I assume that you are not talking for an “as it is” greddy turbo kit at 0.9 bar because that is a death formula for the renesis, I’m talking for an “as it is” greddy turbo kit for the moment.

 

"as it is" greddy turbo kit, with the exception of the engine management system. I guess that voids the death formula.

On my car there was enough fuel from the stock pump and injectors for over .8bar at peak and about .5 at redline

So back to the topic at hand. Your car is making how much hp at .6 bars all the way? Did you say earlier it was 300 at the crank? Taking into account an average drivetrain loss of 20% thats about 240 at the wheels (once again this is a assumption based on the given drivetrain loss) . I remember on my 8, back when i had the emanage, and only .6 bars at peak... it was putting down 240 whp (dynojet measuring wheel hp). So yeah...

.6 Bar Greddy Kit + Porting = 240 whp
.6 Bar Greddy Kit without Porting = 240 whp

-hS

 

To be precisely
.6 Bar Greddy Kit without Porting = 240 whp
.6 Bar Greddy Kit + Porting = 238 whp


What have I done?

 

what you have done is a great job so far!
Great looking car, and good driving and sweet vid.

As for power numbers, it sounds like more tuning will = better numbers!

 

HA HA HA would that be Rob??

 

yeah me too, im into filming and if i could get a car pod (like a tripod) that would be awesome.

 

We are in Multimedia/Photo Gallery topic so I guess we are on topic.
I use this suction pad
Very good quality and you can mount it on glass or metal inside or outside of your car.

http://www.cullmann-foto.de/html/pro...ezial/1003.htm

As for the camera I use this one

A waterproof ActionCamera 520 Helmet Camera with Low Light Chip

http://www.actioncameras.co.uk/acata...et_Camera.html





You can use any video recorder you have, I personally use my carputer.

If you are not interested for top quality and you want a very small MPEG 4 recorder

http://www.neurosaudio.com Neuros MPEG4 Recorder 2

 

thats not bad actually. With the emanage at .6 bars of boost - your above most people. I was lucky to have a VERY GOOD tuner do my car at the time. I think out the box people with the greddy turbo untuned are doing far less than that.

but yeah - i guess this goes in line with other rx8s that have been ported and havent shown a physical benefit from it.

I DO HAVE ONE REQUEST...
if in the future you plan on running more boost (hopefully with a different ems system), can you let us know how much boost your holding at redline. With your ported setup... is it still dropping below .5 bars at redline?

It seems as if the reason why the turbo drops boost is because of the turbine itself, but i had a suspicion it might be due to restricted exhaust ports. If your having the same symptom as the rest of us, i guess i can cross out the possibility of the boost fall out being due to constricted exhaust ports.

-hS

 

i dont want to name names but wow - that clearly defies the laws of physics.

 

Honestly, we can't use exact numbers here, as far as porting goes. For all we know, maybe the guy took a die grinder to a little bit of the port and called it ported. Who knows how much bigger he made it, or for that matter, if he made it [B]more efficient[B]. Porting alone will do nothing, sometimes make it worse, if you do not have a good knowledge base of how air flows through the port..

Not to mention, everyone's tuning is different. If the difference of the port was 10-20whp, but the person who tuned it tuned it to run very rich, then all that power made is lost in the tuning. So...who knows.


On a different subject: I'm wondering who will be the first one to bridgeport the Renesis, seeing as you would be able to bridge both the intake, and the exhaust....

 

im not saying this is the end all answer - THERES NO BENEFIT TO PORTING. I'm just saying, this scenario doesnt provide any backing to the claim that there is a benefit.

-hS

 

Lets forget about wheel or flywheel power, PS or HP, KgM or ft/lbs and lets just see a ported greddy kit and a greddy kit without porting from the same tuner with the same modifications in the same dynamometer, why is it so difficult to believe this benefit?

 

is that the same car, with the only change being the porting?

 

Not the same car but it’s the most powerful greddy until today in the same dyno from the same tuner and modifications.

 

unless your hp numbers before porting are similar to that other car, the comparison isn't going to be very good.

Stock cars can vary in power up to 20 whp from one to the next. With FI, that number can vary by quite a bit more. Especially if there's minor issues like a slightly clogged cat, fouled plugs, poor gas, etc.

 

I know that that’s the reason my comparison is with the most powerful I found.
Ah and the ported one has blue e-manage but the non ported the ultimate.

 

WOW - all that dyno tells me is you need a new tuner

 

If your engine is blown, and you are in the process of rebuilding it..

If you have the opportunity to increase your air flow in and out of the engine by, say, even 2-5%, for BASICALLY FREE, why would you not do so? Saying there is no benefit to porting is absolutely ignorant, and would get you shot on the RX7club, or basically any other enthusiast website on the net. Porting will ALWAYS cause a benefit, except in the case when the person doing the porting has no idea what they are doing.


Sometimes more power isn't whats given from porting. More power POTENTIAL is there, but again, using the same turbo kit (Greddy, in this example) will not reflect much if any change. Turbo lag will be decreased by the porting, and power in the low RPM will probably increase, but not definitely. Because this turbo runs out of air on the top end, you can't expect the porting to magically make the turbo be able to flow more. This is stupid, no one should have to explain this..

This would be a real example: Say..the mazsport kit. Let's just say someone made 400whp, and on the torque curve, it shot up from 4500rpm and just kept climbing. Well, with a mild to extreme port, you could expect that torque curve to instead pick up sooner, perhaps 4000rpm, and due to the larger volume of the port, would not drop off until much higher RPM. That is, if the turbo is capable.

Note, these are all fake numbers, but should give you a good idea what porting is all about..you might want to check out this video:

http://www.rebuildingrotaryengines.c...rting_overview

 

still have yet to see a renesis motor benefit from porting.

kthx

 

The benefit is within the power band of the motor, not raw numbers. Let me put it in a different way. Once you DRIVE a ported rotary, you will NEVER again question whether porting is a benefit or not.

By the way, now you are just being an *** about it..

 

Getting 300whp from greddy turbo with emanage and stock engine is an overkill...Death is coming...Nobody wants an engine with a small lifetime...

Always there will be people who wont believe anything and there should be...

Kosta na to xerese!!Tha ta poume kai apo koda an perasis apo ton xristo se ligo kero pou tha ftiaxno to diko mou...Ade na doume ti tha kani kai mia t4 mazi me to porting...

 

It seems like porting is one of those things that we just haven't found the right application for. It's useful we just can't see exactly how....yet.

 

^^^ That may be one of the truer things said on this forum. I am assuming by application you mean workable port sizes and template that increased VE enough to add sig. HP. whether in FI or NA, no one seems to have knocked it yet even though logic tells us it should help.

 

How com you cant understand this...It pulled with BLUE EMANAGE 300HP ON 0.6BAR pressure...With blue emanage and stock ignition...Com on...and 39kg of torque??How cant you see the benefits of porting??Is there anyone with blue emanage-not interceptor-and greddy turbo pulling more than 39kg in 0.6 bar???NOOOO...