MSD 6A vs. HKS Twin Power

[RICE RACING]

Originally Posted by proz07

rice have you tested the upper limits of what the HKS twinfire will ignite on water injection? i already have the HKS unit not installed but ill be adding water inj shortly running hopefully 20-25psi on a t66. and with the amount of water i will be running possibly 700+cc both pre and post turbo i was looking at the possibility of needing a CDI at the upper range. iv been looking at making a M&W pro14r based system if i need to though. but being that i already have the HKS for streetability i wouldnt mind using it if itll ignite the charge.

z

I run ~1.40kg/cm boost (~20psi old money) in my own car with Water Injection and the HKS box.

*Plugs need to be gaped at or less than 0.020"
*Water rate of 20% to fuel injection rate at peak revs is maximum I have found you can run (mid revs can take up to 40%)
*AFR ratio needs to be 11.3:1 or higher
*Spark advance needs to be around 13 deg after peak torque or more depending on your engine

If anyone of those parameters are out you will find it will be down on power allot (you may or may not even feel the misfire let alone hear it).

50/50 by weight mix of methanol to water allows more power and running of a richer mixture (10.9:1) not only will you get more power but it will have a lower EGT as well (this is what I use now, after testing the differences just this week).

Hope this helps.