how much boost can my stock gslse motor can handle????? thinking of putting a turbo out of a 2nd gen...or should I rebuild

 

I don't think you can boost a rotary engine.

 

^^^^^WTF? I would recomend rebuilding before putting a turbo on. If you ported you can get more boost. I'd max at 15psi stock. If you ported you could get better boost

 

...I think Max7's kidding...or at least I hope he's kidding...oh God what has happened to this world

 

^^^No kidding LOL

 

Yah, just kidding putting a boosted cosmo in mine :P

 

I think Max was politely saying search. I usually say 'No , it has never been done, be the first'.

It's not so much a question of how much boost can it handle, it is more a question of how strong one builds it to handle boost. More boost=stronger build=more dollars spent. I ran across a thread of a 3rd gen running 28 psi. The SE motor cannot be built strong enough to hold that psi, not for long any way.

 

I was thinking of about 10 to 12 psi

 

With an fmic, you should be good for a while, depending tune, supporting mods and condition of engine.

 

phew...thank God...and besides when it breaks down...it might suck for a second especially if you got a hot 1st date...or an important meeting or something but then you realize hey...I can build it bigger and better then before...

 

sorry buddy, but a FMIC has absolutly not a damn thing to do w/ how long his motor will last w/ turbo, intercoolers are basically just there to lower the intake temps, which in turn will make more power, but not running one doesnt hurt the motor

to answer you question, I run 8-10 pounds on a motor that has quite a few miles on it, Ive been turbo for quite a while now and still make about 90 psi or about 8.2 on a mazda compression tester, it just depends on how confident you are on the motor and how soon your lookin at a rebuild

 

My GSL-SE motor had 205,000 miles on it when i turbocharged it. I ran about 12 psi. It lasted about a year before it cracked an apex seal and killed the engine.

 

The intercooler reduces intake temperature reducing the chance of detonation thus reducing the chance of blown engine. No intercooler = 7 pounds boost while a good front mount Intercooler = 15-18 pounds boost without detonation. On a 12A 7 pounds would be good for about 150 hp while 15-18 would be good for about 200 hp. depending on other mods.

 

Sorry buddy yourself. Keeping intake temps down can affect how long the motor lasts. A hot intake charge increases the risk of detonation, which is pretty much the #1 killer of boosted rotarys. 90 psi is nothing to brag about, when 85 is generally concidered service limit.

It's funny that Mazda chose to put intercoolers on the TIIs and they hit fuel cut at what, 8.6 psi? The 12AT's have no intercooler and make less than 6 psi. Both engines also have low compression rotors which help cut down on detenation.

At 10-12 psi, an intercooler will help the engine last longer, and it will make more power with less fuel.

 

thats about right, for good reliability..

 

Trochoid beat me to it ...

but yes, the intercooler does have a "say-so" in the longevity of the motor - as does a few other factors.

 

i think what 84gsNC was getting at is the fact that you can safely run over 10psi without an intercooler. we did it for a while, hell i used to run 18psi no intercooler.... BUUUT, there is no getting around the fact that having an i/c does reduce intake temps. the lower the temps the more power you make and you reduce the chance for detonation... which can easily come from excessive combustion chamber heat.

all in all an intercooler is not the deciding factor in how long a turbo engine lasts at x amount of boost... but it definitely helps.

want to know what the REAL deciding factor to turbo engine longevity is????