Single Turbo Question

[fastsupra]

I am going to be running methanol injection (snow performances stage 3 kit) and I will primarily be daily driving it, road racing, and the occasional drag racing. I just need a good turbo that has a quick spool time. I have been looking at sound performances turbos because along with the turbo I could buy their quick spool valve to go with it. So basically I want to buy a full turbo kit with the fastest spooling turbo that will get me roughly 650whp.

[pwpanas]

Originally Posted by fastsupra

I am going to be running methanol injection (snow performances stage 3 kit) and I will primarily be daily driving it, road racing, and the occasional drag racing. I just need a good turbo that has a quick spool time. I have been looking at sound performances turbos because along with the turbo I could buy their quick spool valve to go with it. So basically I want to buy a full turbo kit with the fastest spooling turbo that will get me roughly 650whp.

I agree with your general approach. But the details about how you get there are critical. Your turbo's boost must not outflow the methanol's ability to suppress detonation, or your engine will quickly get ruined. A slightly larger turbo (with slightly more lag) allows you to run a bit less boost, thereby requiring less net octane. If you were willing to run pure race fuel, it wouldn't be as much of a concern.

[fastsupra]

Ok that's makes sense. Could you post a link to a turbo or turbo kit that would be best for my hp goal and application? I would run race fuel but its just so expensive and I'd rather just run methanol since a one gallon tank of meth injection will last longer then a tank of race fuel.

[pwpanas]

Originally Posted by fastsupra

Ok that's makes sense. Could you post a link to a turbo or turbo kit that would be best for my hp goal and application? I would run race fuel but its just so expensive and I'd rather just run methanol since a one gallon tank of meth injection will last longer then a tank of race fuel.

Agreed race fuel is an expensive option, but it's really the only way to safely squeeze absolutely every ounce of power out of a mid-size or large turbo in a gasoline engine.

Consider this complete turbo kit. If you get it tuned properly (including precise boost control), I'm certain you'll be happy with it:
http://www.spracingonline.com/store/...93-98_Supra/28
Pick the .81 a/r and ball bearing (with water lines) options.

[fastsupra]

The only thing is that I really like that the turbo I originally looked at was a waterless dual ball bearing and that the turbo could have a quickspool valve mounted with it. I don't know much about how big a difference having the waterless turbo vs a turbo with water lines but it just seems better.

http://www.spracingonline.com/store/...urbo_6262/3663

I could be wrong but it just seems like this turbo with the setup I described would spool more quickly then the ball bearing turbo that comes with it or is the difference between spool times very minimal?

Also I found this turbo on SoundPerformance and was wondering what you thought
http://www.spracingonline.com/store/...urbo_6266/3676

[pwpanas]

Originally Posted by fastsupra

The only thing is that I really like that the turbo I originally looked at was a waterless dual ball bearing and that the turbo could have a quickspool valve mounted with it. I don't know much about how big a difference having the waterless turbo vs a turbo with water lines but it just seems better.

http://www.spracingonline.com/store/...urbo_6262/3663

I could be wrong but it just seems like this turbo with the setup I described would spool more quickly then the ball bearing turbo that comes with it or is the difference between spool times very minimal?

Also I found this turbo on SoundPerformance and was wondering what you thought
http://www.spracingonline.com/store/...urbo_6266/3676

A water cooled turbo is more reliable, especially for extended hard driving like top speed runs and roadracing. Contrast that with a 10 second drag race where water-cooling the turbo doesn't do much good.

That's a 569.5rwhp turbo in your 1st link, and a 624.75rwhp turbo in the 2nd link. Neither is a 650rwhp turbo (through a 6spd), so neither one meets your power goal - right? Also, 624.75rwhp is right at the top of that 2nd one's capability range, probably running a lot of boost to get there. That boost level may be beyond your meth injection kit's ability to suppress detonation for. If you were willing to run race fuel, you could try that turbo at 40 or 50psi of boost, but with a limited flow meth injection kit, that won't work. Oh, and of course that 569.5rwhp will spool quicker, but so do the oem twins - right?

[fastsupra]

Yeah you are right. so then do you know a good turbo that is waterless and quick spool valve compatible that will give me my 650rwhp goal?

Along with the turbo kit and everything that will come with it, what else will I be needing to upgrade in order to run 650rwhp? I currently have 750cc injectors with a top feed, greddy 3 row FMIC, boost controller and the snow stage 3 methanol injection kit. I am looking at getting an AEM standalone when I buy the turbo kit. Is there anything else that I will need to upgrade?