Whats the stock boost level?

Rx-7fetish · 02-15-2010, 08:40 AM

^^^^^ What is it, ive been searching for a night and a day now, i keep getting irrelevant crap from the search engine. Oh, its an s4

RotaryDiagnostics · 02-15-2010, 01:54 PM

For a completely stock TII, I believe it is less than 8.6 psi. Fuel cut to rotor 2 occurs at that pressure. However, actual boost levels depend on several factors including ambient air density, the health of the intake piping, among others.

N.RotaryTech · 02-15-2010, 02:03 PM

A buddy of mine told me its around 7-9 psi.
But that's just talk an no proof.

Dzire · 02-15-2010, 02:33 PM

S4 model
- 2000-5000 rpm = 320 mm mercury (0.42 bar/6.2 psi)
- rpm >5000 rpm = 280 mm mercury (0.36 bar/5.4 psi)
Fuel cut = Boost > 400 mm
Max turbine speed = 110,000 rpm

Rx-7fetish · 02-15-2010, 04:09 PM

Right on guys, thanks. That's the quickest, exactly what I needed, response I have ever recieved.

Ender · 02-15-2010, 11:57 PM

Quote:

Originally Posted by Dzire

S4 model
- 2000-5000 rpm = 320 mm mercury (0.42 bar/6.2 psi)
- rpm >5000 rpm = 280 mm mercury (0.36 bar/5.4 psi)
Fuel cut = Boost > 400 mm
Max turbine speed = 110,000 rpm

Is this in the FSM or some other documentation? I'm confident in its correctness because I've read it all over the place, but I don't think I've ever seen official specs.

Dzire · 02-16-2010, 12:18 AM

all of this information is in a book that was written by Jack k Yamaguchi Mazda let this guy have access to the team that design the second generation RX 7

Ender · 02-16-2010, 01:56 AM

Quote:

Originally Posted by Dzire

all of this information is in a book that was written by Jack k Yamaguchi Mazda let this guy have access to the team that design the second generation RX 7

I might just have to find that book...

02-15-2010, 08:40 AM	#1
Rx-7fetish Blue Blur Join Date: Jan 2009 Location: Windsor iTrader: (0) Posts: 211 Rep Power: 0	Whats the stock boost level? ^^^^^ What is it, ive been searching for a night and a day now, i keep getting irrelevant crap from the search engine. Oh, its an s4

02-15-2010, 02:03 PM	#3
N.RotaryTech Home-brew Rotary Join Date: Feb 2008 Location: GooseCreek SC iTrader: (0) Posts: 552 Rep Power: 17	A buddy of mine told me its around 7-9 psi. But that's just talk an no proof. __________________ '89 RX7 GTU, half-Bridge-port S4/S5 NA, E6K, Full RB exhaust, weekend warrior. '83 RX7, The "this might take awhile" project. '87 RX7 GXL, Rest In Pieces. '98 Subaru Impreza Outback-sport, rx7 rescue vehicle, down for repair. '94 Ford Ranger, daily.

02-15-2010, 02:33 PM	#4
Dzire Rotary Fanatic Join Date: Apr 2008 Location: B,ham AL/Hollywood FL iTrader: (0) Posts: 151 Rep Power: 17	S4 model - 2000-5000 rpm = 320 mm mercury (0.42 bar/6.2 psi) - rpm >5000 rpm = 280 mm mercury (0.36 bar/5.4 psi) Fuel cut = Boost > 400 mm Max turbine speed = 110,000 rpm __________________ RX8 2004 GT RX7 1988 TII

02-16-2010, 12:18 AM	#7
Dzire Rotary Fanatic Join Date: Apr 2008 Location: B,ham AL/Hollywood FL iTrader: (0) Posts: 151 Rep Power: 17	all of this information is in a book that was written by Jack k Yamaguchi Mazda let this guy have access to the team that design the second generation RX 7 __________________ RX8 2004 GT RX7 1988 TII

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02-15-2010, 01:54 PM	#2
RotaryDiagnostics Compression Tester Man Join Date: Feb 2009 Location: Mont Alto, PA iTrader: (1) Posts: 137 Rep Power: 16	For a completely stock TII, I believe it is less than 8.6 psi. Fuel cut to rotor 2 occurs at that pressure. However, actual boost levels depend on several factors including ambient air density, the health of the intake piping, among others.

02-15-2010, 04:09 PM	#5
Rx-7fetish Blue Blur Join Date: Jan 2009 Location: Windsor iTrader: (0) Posts: 211 Rep Power: 0	Right on guys, thanks. That's the quickest, exactly what I needed, response I have ever recieved.