my friend has only 4500 miles on her new street ported engine,along with a very nice and savege set up that includes the t51rkai fmic,850cc pri,1600 sec,dual walbros ignition sparks all necesary mods for high hp number.
he ir running know on 14 15 psi and we want to run more to feel the real power of the turbo we were thinking in 22 23 psi but we dont know if the water/methanol injection will protect the engine to hold that number or. we have to run race gas.
the reason why i ask this is because is very hard in here to find race gas.

thanks

 

Too much boost on pump gas for a rotary. Even with water injection I wouldnt run past 18 psi.

 

Exactly. I recommend you find some race gas before you up the boost much past 17 or so. It's too easy to detonate and junk your motor at 23 psi on pump gas.

 

well, thanks for the replys.
like i said before is almost imposible to find race gas in here,the only way is ordered via international shipping and really i dont know if you can shipped race gas from one country to another,the only near to race gas here is aviation gas that is leaded and contains 103 octanes i dont know if that will do the job.
thanks

 

You can run up to 23psi with water/alky injection and pump gas with no problem, seen it done already, don't be scared, as long as the tuning is on point it should be no problem.

 

Leaded 103 octane (straight) will be OK for 22-23psi.
With that set up anything around 20+psi he should be making plenty of power to have to lower the boost to gain traction:-)

Good Luck
JD

 

well i dont know who to listen know refering the the water/methanol injection and if will be safe or not,id like to know if anybody is running a similar sett up and with that psi,but i thing the safest way will be running aviation gas, i think me and my body will have to visit a local airport the week for some BP-air fuel.

 

Yes you can run water meth mix at 22 psi no problem. I ran water only for 6,000 miles with a virtually the same setup as you at 20psi. Recently I have gone on to 50/50 mix water/meth and was testing at the weekend running 1.7 bar on pump fuel. Try and get some tech info on the av gas but as far as I know av gas burns too slow, for race fuel you want something that has great resistance to detonation and also burns fast.

 

hopefully if my project gets done I'm going to be running 20-22psi on pump gas with alky injection. The stock motor with no race gas or alky injection would be good for 15-17psi. The whole reason for meth/water/alchy injection is to cool the intake temps and does so very well! read on the many threads regarding the injection and you will find 20+ psi is fine.

 

My money says that the tuning won't be on point. Anyone who runs 23 psi on pump gas with only an aquamist/coolingmist water injection system is crazy. You're asking for a blown engine.

I have a water injection setup on my FD, and don't run it past 18 psi.

I say you look into the aviation fuel, that sounds like your best bet to ensure the motor runs well at a higher boost level over the long haul.

 

why wont the cool/alky equip cater for 23psi? I am just wondering. I was planning on one of those setups on my Conversion.....i have 1000 and 1680s, plus shitty fuel.... 93 oct should be.

what would you recommend on the WI or W/Alc inj?

Thanks

G

 

Isn't Av gas octane rated on a different scale? So 103 octane would really be less? That is the impression I was under...

 

So what would be a good psi on straight aviation gas, if that's scaled different?

 

yes you are right the aviation gas is rated in another scale.The BP air gas is rated in the scale of 100/130 the said that is between 117 octane but if you take that to a normal base nomenclature like the one used in normal pump gas or VP race gas yoy get a 102.8 octane gas ledaded of course.
i was at a local airport today and that was the guy told me.

 

Like boostn7 stated, you can run 22-23 psi with the 103 octane avgas.