What boost is safe??

[gsb876]

Anyone know what level of boost on a rotary is safe??

My car is very highly modded so can handle more than most, but does anyone have a level they think is safe??

[GaryS]

I thought it was ~14 psi unless you had some serious engine work (dowelling, ceramic seals) done.  I mgiht be wrong thoguh and that might be the limits of the stock turbos.

[tomrex]

hello
the higher your boost levels, the more fuel you need to get in so i\'d have a chat with a specialist before upping the boost and running lean!:)
tom

[Carl]

The amount of boost all depends on the build and the state of tune.
You can run very high boost on a very HIGHLY MODDED ROTARY ENGINE but it must be very well tuned and the more you run the less time it will last.
Kind regards
Carl

[Fish]

It all comes down to the person mapping it. Make sure that they know what they are doing, otherwise leave it stock.

Fish

[gsb876]

Thanks for the replies guys, basically the cars pretty well modded to say the least, the engine is street ported running a T-78 turbo with upgraded radiator/intercooler , hard pipe system and so forth, you say 14psi, whats that on the bar system ie:1.1bar??

[Carl]

1 bar is 14.7 psi.
That means that the engine if it is running that air pressure is in actuality running at around 28 PSI of boost including natural air pressure,so the 14.7 psi is 14.7 psi over natural air pressure.

The zero on most boost guages shows where natural air pressure is.
Hope this helps.

Kind regards
Carl

[scooby_si]

not forgetting the power FC Gurj http://www.smileycentral.com/?partner=ZSzeb008\' target=\'_blank\'>http://smileys.smileycentral.com/cat/547.gif\' border=0>
Si

[20B_boy]

Originally posted by gsb876
Thanks for the replies guys, basically the cars pretty well modded to say the least, the engine is street ported running a T-78 turbo with upgraded radiator/intercooler, hard pipe system and so forth, you say 14psi, whats that on the bar system ie:1.1bar??

What fuel system do you have Gurj? what injectors and pump? What boost do you run?

[gsb876]

Originally posted by 20B_boy
What fuel system do you have Gurj? what injectors and pump? What boost do you run?

No idea:confused:

Normally i dont run more than 0.9bar just to be safe:(

[antnicuk]

Carl,
you mentioned that 1 bar is 14.7, i have always heard conflicting stories, my profec instructions state 1 bar is 14.2 psi, but i have heard others say it 14.7, can you clear this up once and for all please.........:confused:

regards
tony

[bnaellis]

14.2 is measured in kilogram/centimeter2
the above measurement is what most jap boost gauges and boost controllers are reading in which is very close to measurements in bar but not the same.

[antnicuk]

cheers for that brian,  if that is the case, does the apexi commander read in bar or kilogram/centimeter2?

[20B_boy]

Power FC is the same; reads kg/cm2.

[antnicuk]

does anyone have a conversion table of some kind that they could post with Bar, psi and kg/cm2?

it would make life a lot easier when i\'m trying to work out what boost i am actually running.

regards
tony