Air/Fuel Ratio & HKS AFR Type D or L or Super HKS AFR

[priyesh12]

Originally Posted by pwpanas

I'm pretty sure the "gizzmo MS-2"s FCD will not work properly with the 2jz-gte. Here's why you need a GReddy BCC:
http://www.mkiv.com/techarticles/bcc...GReddy_BCC.htm

Okay, understood, I shall invest in the GReddy instead, it definitely makes more sense to. To be on the safe side as well lol.

Originally Posted by pwpanas

Adjustable cam gears are quite easy to install, and there are well-known settings that produce a good result:
http://www.mkiv.com/techarticles/cam...all/index.html

Thanks for the link, looks like there's always a way, I will get some for sure, it doesn't seem too difficult.

Originally Posted by pwpanas

As long as you're using the oem maf, the oem ecu, and the oem O2 sensors, you don't need to worry about your a/f ratio...regardless of the boost level. However (again) sufficient octane to match your boost level is extremely critical.

Seeing how I'm only able to access 93 octane I shall definitely keep my boost at 15psi.

Originally Posted by pwpanas

That website's description of the MS-2's FCD functionality references a "(note 1)" that I could not find. Based on that one problem alone, I'm already somewhat suspicious of this device. Again, odds are that its FCD functionality will NOT work properly for the Mkiv Supra Turbo.

Haha yeah, I tried to look for it as well and no luck. I checked the online manual and there is nothing I can get from it maybe you would have better luck and perhaps this could be useful for someone else making the same mistake I have lol

http://gizzmousa.com/file-copies/MS_2_Manual.pdf

Thanks for the help, learnt quite a bit today!

[pwpanas]

Originally Posted by priyesh12

...Seeing how I'm only able to access 93 octane...

I think you'd be surprised. Most dyno shops, race tracks, and motorcycle shops have race fuel. Many areas have a distribution center not too far away for at least one race fuel supplier: VP Racing Fuels, Sunoco, etc. You can even run methanol injection with Isopropyl or Denatured Ethanol, both readily available from home improvement stores. Heck, worst case you could run your meth injection system with pure distilled water. Consider the alternatives, and don't limit yourself to 15psi - what a waste, considering your shortblock and head is built to handle about double that.

Originally Posted by priyesh12

...I checked the online manual and there is nothing I can get from it maybe you would have better luck and perhaps this could be useful for someone else making the same mistake I have lol

http://gizzmousa.com/file-copies/MS_2_Manual.pdf

As much as I hate to admit it, it appears I may have been wrong about the FCD function in the MS-2. According to the manual, it may work just like the GReddy BCC...better in fact, since you can adjust the max voltage level interactively on a display, instead of calibrating it with a screwdriver. Just set the max voltage per the GReddy BCC install instructions, and it may work perfectly. Again, this assumes the documentation in that manual is accurate, and the only thing it does is limit max voltage. The critical difference between devices that do not limit cut properly and the ones that do (for the Mkiv Supra Turbo) is as follows: the ones that do not modify the voltage below the cut point (usually linearly). I'd recommend you test this - use a bicycle pump to change the pressure the TPS is seeing to just below the cut point, and be sure the MS-2 isn't modifying the voltage (compare the sensor output voltage against the MS-2 output voltage) - if they're the same, it works properly...but if they're not the same, the MS-2 is modifying the voltage below the cut point and you'll need to get a GReddy BCC.

[priyesh12]

Originally Posted by pwpanas

I think you'd be surprised. Most dyno shops, race tracks, and motorcycle shops have race fuel. Many areas have a distribution center not too far away for at least one race fuel supplier: VP Racing Fuels, Sunoco, etc. You can even run methanol injection with Isopropyl or Denatured Ethanol, both readily available from home improvement stores. Heck, worst case you could run your meth injection system with pure distilled water. Consider the alternatives, and don't limit yourself to 15psi - what a waste, considering your shortblock and head is built to handle about double that.

Haha yeah, I'll see if i can't get my hands on some isopropyl or denatured ethanol. Race fuel, I'm not too sure on that since I live in Africa literally in the middle of no where lol....but I see if I can find some for sure.

Originally Posted by pwpanas

As much as I hate to admit it, it appears I may have been wrong about the FCD function in the MS-2. According to the manual, it may work just like the GReddy BCC...better in fact, since you can adjust the max voltage level interactively on a display, instead of calibrating it with a screwdriver. Just set the max voltage per the GReddy BCC install instructions, and it may work perfectly. Again, this assumes the documentation in that manual is accurate, and the only thing it does is limit max voltage. The critical difference between devices that do not limit cut properly and the ones that do (for the Mkiv Supra Turbo) is as follows: the ones that do not modify the voltage below the cut point (usually linearly). I'd recommend you test this - use a bicycle pump to change the pressure the TPS is seeing to just below the cut point, and be sure the MS-2 isn't modifying the voltage (compare the sensor output voltage against the MS-2 output voltage) - if they're the same, it works properly...but if they're not the same, the MS-2 is modifying the voltage below the cut point and you'll need to get a GReddy BCC.

Okay so I did the bicycle pump test you mentioned...the results were what I hoped for...the MS-2 was not modifying the voltage, the sensor output was equal to that of the MS-2 and so I guess its working properly...so perhaps this MS-2 is worth the money then!

Thanks for the help!

[pwpanas]

Originally Posted by priyesh12

Haha yeah, I'll see if i can't get my hands on some isopropyl or denatured ethanol. Race fuel, I'm not too sure on that since I live in Africa literally in the middle of no where lol....but I see if I can find some for sure.

Cool. Also, toluene (also known as xylene) is a good octane booster - please do some reading before using it though, I believe you have to mix in some marvel mystery oil or 2-stroke synthetic motorcycle oil along with it.

Originally Posted by priyesh12

...Okay so I did the bicycle pump test you mentioned...the results were what I hoped for...the MS-2 was not modifying the voltage, the sensor output was equal to that of the MS-2 and so I guess its working properly...so perhaps this MS-2 is worth the money then!

Thanks for the help!

Anytime. I assume you also checked above the cut point, and confirmed that the voltage is actually getting clamped. If so, I agree it looks very good for this device.

[priyesh12]

Originally Posted by pwpanas

Cool. Also, toluene (also known as xylene) is a good octane booster - please do some reading before using it though, I believe you have to mix in some marvel mystery oil or 2-stroke synthetic motorcycle oil along with it.

Anytime. I assume you also checked above the cut point, and confirmed that the voltage is actually getting clamped. If so, I agree it looks very good for this device.

Okay will check that out....and the voltage is getting clamped beyond the cut off point, in this case 4.3 volts if I have it set correctly.

[pwpanas]

Originally Posted by priyesh12

Okay will check that out....and the voltage is getting clamped beyond the cut off point, in this case 4.3 volts if I have it set correctly.

Great. Please keep us informed as you test it out.