how much timing to run w small roots blower?

General engine tech -- Drag Racing to Circle Track

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Scotthatch
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Re: how much timing to run w small roots blower?

Post by Scotthatch » Thu May 10, 2018 12:24 pm

F-BIRD'88 wrote:
Thu May 10, 2018 11:24 am
The water methanol injection is what allows you to spin the blower faster than "12,000 rpm"
as it cools the air charge and cools the blower too.
The blower no longer hot soaks. (gets too hot to make power)
The power is consistent,repeatable and more reliable (detonation is suppressed)
Roots blowers love intercooling. Especially when you spin them faster.
In this case 2.28:1++ ratio.
(8" crank 3.48" top pulley set.)
Very well put ... I totally agree

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