I have 5$ on MM blowing another motor this year

 

Maybe yours. Not mine.

 

10 to 1 odds that taj blows his **** up waaaayyyyyy before MM (accidentally. self impost ownage @ 17 psi does not count)

 

17 PSI is a possibility.
I have enough fuel at the moment and the water/meth should do the trick.
I'm not so sure I want to try it in the Summer time, though.

 

Lol yay MM finally getting a little more revealing on the avatars. Now where is my decensor tool rofl.

 

That's an old one.

 

^^^Oh , well....excuse me. Btw why did this end up blowing up? Was it the tune? I've got bad memory sorry

 

I think it was the tune

MM, Jedi, you won, I blew my engine, the turbine fin went off...............

 

i know your joking taj, but im seriously inclined to believe you.

 

I don't know.
I never did get any info on the final tune that the shop that Louie used arrived at.
I do know that, with a vent-to-atmo wastegate, street-tuning is almost impossible because of the noise.
You would NEVER hear detonation or even lean mis-fire when the car is making power.
Really, I don't understand why people do vent-to-atmo wastegates on a street car.
Its stupid, annoying, unnecessary and makes the car impossible to tune.

 

Cause who wants to hear sounds of detonation when you can hear the awesomeness that is your wastegate? It adds like 20 WHP!!

 

I dont care, I love my cars loud....I think a VTA wastegate sounds mean as hell. It's not a DD so what does it matter? Plus the MAIN reason I did it was because I was TOLD that it does free up some more ponies....

 

Because you can't hear the motor breaking over the sound of the WG.

And, because of the above, it freed them right up and sent them out of the motor completely.
Whoever told you a vented WG creates power lied to you.
Its just a strategy to help maintain uniform boost control at very high boost levels - a place where your motor wasn't going to ever go.

 

Please take a nice walk to the RX7club where multiple dyno comparisons will give you a change of mind

If you running under 15psi...
And are using the stock exhaust it will give you a huge power boost easily 30hp. Using a 3" exhaust will yield a significant performance increase around 15-20hp or more. Meanwhile a 4" full exhaust, it won't make a difference.

Above 15psi it will make a HUGE difference for Rotaries and a significant difference for piston engines (this is a very very general statement I know but people seriously underestimate the flow of a Rotary around here).

Also to say you can't hear it misfire? You must have not tried dumping it to atmosphere on a rotary because you can definitely hear it.

14.5 psi on a 3rd gen RX-7:

http://www.rx7club.com/showthread.php?t=657974
also another discussion about this in favor of: http://www.rx7club.com/showthread.ph...tmosphere+dyno


PLEASE NOTE: Mazdaparts.com and Esmeril Racing offer the dump to atmosphere design for tracked cars only (free of charge)...it is not our responsibility if you do not follow through with these guidelines.

 

You can't hear it detonate. I didn't say anything about misfire.

The rest of your post is, frankly, bullshit.
The size of the piping is not the issue.
Opening the wastegate to atmo does NOT make power.
If your piping is too small to handle the flow, that is an entirely different issue and using an open WG to fix that is stupid.

 

Word of warning to everyone on this forum...
Just because MM says something doesn't mean it is true

That being said did you not see the dyno I just posted?

Also why do most professional track cars dump to atmosphere even when running a 4" exhaust?

And I honestly imagine you look like that little devil

Oh and you sure can hear it detonate.

 

Word of warning to everyone on this forum...
Just because truemagellen says something doesn't mean it is true

Yes. So what does going from 3" exhaust piping to 4" have to do with the wastegate?

Because they need the WG response to avoid spikes. Racecars are not street cars. Nice edit on your post, BTW.

Well, obviously not or Louie might still be driving his car today.

Have you actually driven in a car with this kit on it?

 

Red: Dump to Atmosphere
Blue: Recirculate
14.5psi runs

 

this isnt my argument, but someone explain to me how dumping a WG to atmosphere can produce anything more than minimal power gains?

the only way i see that working is if the exhaust was too restrictive to handle all the flow, then when you open the WG to atm, of course it'll show gains then...

EDIT: i dont have a clue as i've never even looked at external WG's but that^^ is what seems to make common sense to me.. either way i'd like to hear a good believable explanation for it...

 

On what size pipe, turbo and WG?

You are comparing apples to oranges.

Louie's setup is not even a fair comparison to that dyno, which sits not only well within the range that other variables are influential but has other obvious changes in the running state of the motor.

 

3" is still restrictive when the wastegate opens

besides 15 hp is not a minimal gain, for a simple design change

I don't understand the resistance...it is cheap or free power

Atmosphere is a much better deal then a whole new exhaust system, 3 inch or 4"

 

on a 340whp car, 15hp is 4.4% ....... personally i wouldnt put up with the noise for that. free power or not. if i had a track car sure... not a street car.

also free or not, i would call 4.4% minimal...

 

Ok fair enough then it is a matter of opinion over the sound. I do agree it is very loud and I see why people would not want it.

 

I would have to agree. There are lots of modifications that are done to race cars that certainly improve performance a marginal amount that would be stupid to make on a street car.

 

Granted I am noob to RX8Club.com, but I am wondering why I should not believe what MM says? Proof of the matter is every month, if not more often, people are having dyno meets and flying him in to do the tunes and tweaks.