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Old 08-28-2008, 08:40 PM
Razor Razor is offline
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Join Date: Dec 2007
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Quote:
Originally Posted by I8AV8 View Post
so do you shoot 200 psi down the TB, or is it regulated down? are these systems intended to take over when the intercooler can't drop the intake charge air temp enough? how do you know when you need one?
Yes and no. See the pump is capable of 200 PSI. Meaning if you set the system becuase you needed 200 PSI then that capability would be there.

Yes its regulated down, most operate at approx 30 PSI when they activate at 6 PSI boost and pressure up to 125 PSI at 23-25 PSI boost. Electronics change the ramp rates allowing for a smooth curve.

Yes they are intended to take over when the IC is not big enough. Yesterday did a system on a twin turbo SBC with a large FM IC and he was seeing 170 degree's intake temp at 16 PSI boost.. with the methanol the numbers came down to 80 which is below ambient here through the traps.

When is more needed.. typically when you want more from the tuneup. Meaning you want to run more aggressive timing, higher boost, leaner AF ratio's, etc.. all those things that create power.

On a Buick application.. I have used straight water, mix(50/50,60/40,70/30,etc) and straight methanol. All three yield positive results. The difference basically is which of the three yielded the highest detonation resistance and most power. That was straight methanol. Each one had its own tuning strategy.

Hope this helps
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