BigOLundh

iTrader: (1)

BIZAM - and that was my original point. The NA RX7s that were ported showed an increase in power up top. BUT the NA RX8s that were ported showed none.

I maybe mistaken here (since im not THAT familiar with the 7 motors)... but i thought the benefit for them was because their intake ports were small, so by increasing them they received better flow in relation to the intake and exhaust ports.

My whole point has been since the intake ports on the 8 are larger than the 7s... will making them larger be beneficial. Its not like our current intake ports are significanly smaller in relation to exhaust ports as was the issues on the 7.

Renesis * (More Air In + Equal Air Out) = WHY?

AdRoCK3217

Well, in automotive applications, the intake(s) is always bigger than the exhaust(s)..this is true on all rotaries, including RX7's (and RX8's), and (as far as I know) all piston engines. You will always see the intake valves being bigger than the exhaust valves.

Even on the RX7's, the intake ports made up a larger volume than the exhaust ports. It may not look like it, but with the sleeve in place on the exhaust, it really isn't as big as it looks.

Not to mention, most people don't count this in, but there are four or six intake ports, not just two like for the exhaust. Both the four and six port motors have a larger combined intake volume than exhaust.


But honestly, as you and I have repeated..there is no real way to prove a benefit from porting. No one is going to go through all the hassle to prove an increase in power to people on the internet

So what it comes down to, as I said before, is feel. The feeling of a ported motor is drastically different from a non-ported motor. The difference in turbo lag, especially on something as large as a GT40 or 42 is HUUUGGGGEEE

But, as you've said, that sounds a lot like butt-dyno...so

Mauros piravlos

Can I have your opinion with the AFR readings? 10.5 – 11.5 with tuners Sard and mechanics innovate meters from the downpipe and 12 – 13 at the dyno from the exhaust, is it logical according the sensor location or dynamometers afr meter is scrap?

And something else, did anybody else tried to relocate the airinx to make the suction pipe shorter and straight?
I do that today

AdRoCK3217

The only problem I see with moving the intake to that spot is you are now getting absolutely no direct flow of outside air. I would imagine your intake temps would sky rocket after that move, and while you will have (marginally, if any at all) less turbo lag, you will have a decrease in overall power.

You should think about getting the Mazsport cold-air intake for the Greddy turbo kit, or maybe make your own.

Mauros piravlos

I wanted to try this because I think that with Varis vents and Mazdaspeed front bumper openings the air flow is much better than stock where Greddy designed.
After all the air travels through the intercooler.
I can easily reverse that process if I see no gain but I should try it.

Dominikanator

Hey man I just purchased an Rx8 and also a Greddy Turbo Kit not too long ago. I'm wondering how much it cost you to install yours in and where did you do it? I'm from NJ but I'm currently in Iraq and I've been having a hard time trying to find somewhere online to take my Rx8 once back in a month. Also another question, did you get new headers for yours? I was told to change my headers but I haven't had any luck finding DC ceramic sports headers online the 3 piece ones. Can you help me at all? Thanks.

Kane

iTrader: (1)

Search Major Horsepower upgrades for Greddy info. You don't use headers for a turbo. Are you going back to NJ? If so talk to Lil Benny on this forum, he is from there and has a turbo-ed 8.

mysql101

I don't think "designed" is the proper word. Maybe "plopped together" is. I think most of us end up with cold air intakes eventually. If you have a obd2 scanner, you can read your intake temps.


And right behind the intercooler is a nice hot radiator with 200+ degree air.

mysql101

Whoever you spoke with doesn't know the RX-8. Headers don't apply for this turbo since you replace them with something that routes the exhaust from the engine directly into the turbocharger.

Headers even for the RX-8 in NA don't do much either...

Kane

iTrader: (1)

I was thinking today about trying to find a spot behind the right oil cooler area for the intake. It would be a lot straighter than the greddy set up.

I can't go and play with my ride, anyone else try that? Oil cooler / fender well area.

mysql101

Behind the oil cooler? Are you being serious?

As far as "a lot straighter", look at the route from filter to turbo:



What you propose will make your intake temps go up and give you nothing back in return.

Kane

iTrader: (1)

Oh yeah, I see it now. Not too bad.

I was being serious, but that doesn't mean it was not stupid!

Thanks bro.

california style

it never hurts to ask (unless you get flamed to hell and back)

Mauros piravlos

just come to Athens its no big deal, right under Acropolis rock, ask for Kostas!!

Actually I have, 2 of them
1 OBDScan+can from Harrison R&D (that never worked properly for me)
2 AutoEnginuity Scan Tool that is permanently connected (carputer)
I see no differences at all to intake temps.

True, maybe its time to relocate this too…somewhere away…hmm at the trunk?

GrRx8MaZdA

Kosta posa xlmetra vgazis me ena full depozito...????

DOMINION

Dude you can drift an 8 better than R Millen and his Dady lol you hear that JR you suck too! gooOo Mauros Piravlos!!!