Vj8?

**MX_misel** · 6-23-06, 5:47

just looking around the site and searching but cant seem to find any info on the VJ8 i have one on my car whats the differance im guessing its smaller? but by how much? if it is then it should be able to run more then 12 psi before i get boost cut hey?

**SixSick6** · 6-23-06, 6:39

Try looking up VF8 instead.

From my undertsanding there is such a thing as a Vj8 that came on the early Telstars...but it could just be you Aussies making stuff up.

BUT, which turbo do you actually have? You guys in Australia had some wacky turbos even though they were the same thing.

IE: A VJ11 as I've heard has some different numbers for the TX5's even though it's the same turbo. As if you Australians talking about "hi flowing" or getting your stock turbo "hi flowed" wasn't bad enough.

**MX_misel** · 6-23-06, 7:04

turbo spec: VJ8 8701
serial no. RHB5 19047A
parts number: fen70
any more help, would like some info

**SixSick6** · 6-23-06, 7:25

RHB52KW-5200 (turbine) 2K P20 (exhaust housing) NR BRKL348CZ (compressor spec) is the entire spec/part number. It's used primarily by Mazda and shares everything including the service kit (bearings). It has the same 52mm turbine, same exhaust A/R, same spec. Just from info I have on hand from work, it's the same turbo as the Vj11 only a different part number for a different country. Take a picture of it or if you have it out and off of the car, take the compressor housing off and measure the compressor wheel. If it's the same as the Vj11 it will measure 52.5mm outter and 36mm inner.

Wundy_30 · 6-23-06, 8:38

Boost cut has nothing to do with the turbo's ability to produce boost or the size of the turbo. It will have something to do with the time it takes to hit boost cut. Point is, boost cut will still come on when the boost level hits 12psi or what ever the level is. If the turbo is smaller it will spool quicker but may takelonger to pump 12psi of boost.

**turboed2.2** · 6-23-06, 12:25

Quote:

Originally Posted by Wundy_30

Boost cut has nothing to do with the turbo's ability to produce boost or the size of the turbo. It will have something to do with the time it takes to hit boost cut. Point is, boost cut will still come on when the boost level hits 12psi or what ever the level is. If the turbo is smaller it will spool quicker but may takelonger to pump 12psi of boost.

i always thought it was an amount of flow tripping the fuel/boost cut.. IE 230cfms of air... this just so happend to happen at 12psi on the stock turbo.. with a bigger turbo would the boostcut not happen sooner? or am i just confused :P

**n2o_matt** · 6-23-06, 12:32

Quote:

Originally Posted by turboed2.2

i always thought it was an amount of flow tripping the fuel/boost cut.. IE 230cfms of air... this just so happend to happen at 12psi on the stock turbo.. with a bigger turbo would the boostcut not happen sooner? or am i just confused :P

you are correct.

**MX_misel** · 6-23-06, 19:32

i had a series 5 RX7 turbo To4 sorta thing, i wish boost cut was a 12 with that thing still woulda been fun highway, but my point is, boost cut was at about 6 psi, there for i assume a smaller turbo would be higher boost cut... just a thought and yeah its sitting next to me now, but i really am too lazy to pull it off and measure, plus i dont have a accurate measureing tool. go spelling. ican take a few fotos though just so you can have a little peak at it? just for fun
good day. Ryan

**MX_misel** · 6-24-06, 23:59

**SixSick6** · 6-25-06, 1:14

Same thing. Thats our equivalent VJ11.

rusty_ · 5-7-08, 10:53

they arnt the same thing. got them both from the wreckers.
vj8 is off a older 85'ish model
vj11 is off 88' GD

vj11 about 2-4mm bigger if u can notice in the pic
the VJ11 on the left the VJ8 on the right

6-23-06, 5:47	#1 (permalink)
MX_misel Join Date: Apr 2006 Location: sunshine coast, Australia iTrader: (0)	Vj8? just looking around the site and searching but cant seem to find any info on the VJ8 i have one on my car whats the differance im guessing its smaller? but by how much? if it is then it should be able to run more then 12 psi before i get boost cut hey?
	"witty comment"

6-23-06, 7:04	#3 (permalink)
MX_misel Join Date: Apr 2006 Location: sunshine coast, Australia iTrader: (0)	turbo spec: VJ8 8701 serial no. RHB5 19047A parts number: fen70 any more help, would like some info
	"witty comment"

6-23-06, 8:38	#5 (permalink)
Wundy_30 Join Date: May 2006 Location: iTrader: (0)	Boost cut has nothing to do with the turbo's ability to produce boost or the size of the turbo. It will have something to do with the time it takes to hit boost cut. Point is, boost cut will still come on when the boost level hits 12psi or what ever the level is. If the turbo is smaller it will spool quicker but may takelonger to pump 12psi of boost.
Wundy_30 Join Date: May 2006 Location: iTrader: (0)

6-23-06, 19:32	#8 (permalink)
MX_misel Join Date: Apr 2006 Location: sunshine coast, Australia iTrader: (0)	i had a series 5 RX7 turbo To4 sorta thing, i wish boost cut was a 12 with that thing still woulda been fun highway, but my point is, boost cut was at about 6 psi, there for i assume a smaller turbo would be higher boost cut... just a thought and yeah its sitting next to me now, but i really am too lazy to pull it off and measure, plus i dont have a accurate measureing tool. go spelling. ican take a few fotos though just so you can have a little peak at it? just for fun good day. Ryan
	"witty comment"

6-24-06, 23:59	#9 (permalink)
MX_misel Join Date: Apr 2006 Location: sunshine coast, Australia iTrader: (0)	few more updates on my car
	"witty comment"

5-7-08, 10:53	#11 (permalink)
rusty_ New Member Join Date: May 2008 Location: iTrader: (0)	they arnt the same thing. got them both from the wreckers. vj8 is off a older 85'ish model vj11 is off 88' GD vj11 about 2-4mm bigger if u can notice in the pic the VJ11 on the left the VJ8 on the right