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I've heard bad things about the Endyn stepper pulley not fitting correctly and they have a tendency to slip. Stepper pulleys tend to yield roughly a 2-3 psi increase depending on your entire setup including exhaust. 10 lbs is still a reliable boost level for the JR kit without some sort of "intercooler".
Hi all, I was just after some advice. I am from australia and just bought a jackson racing supercharger to go on a 89 CRX SiR. The jrsc is second hand but almost new and came with an endyne pulley and a stock.
The endyne pulley is supposed to set boost at around 10 - 10.5 psi? I think? I am unsure whether to put the stock pulley in or the endyne pulley.
Q1: Is this too much boost without some kind of intercooler? will it damage the supercharger?
Q2: Would you recommend that I install some kind of water injection kit to cool the intake temperatures?
Id like to run the higher boost but I still want reliability and dont want to do damage to my motor or supercharger. And apparently its a pain in the ass to change the pulleys once installed.
I currently run the Endyn stepper on a 1994 B16... boost went from 7 to 10psi. Its a blast to drive, you'll love it!! [img]biggrin.gif[/img]
In response to BoostedEX: I've heard many people complain about stepper fitment, but mine fits perfectly. Perhaps the design was improved at some point, I got mine about a year and a half ago.
Swapping the pulley is a bit tricky but can be done, took me about 2..3 hours I think.
_If_ tuned correctly, I'm confident you can safely run 10psi. The Eaton blower is designed to be used between 5 and 10psi, check out the Eaton website for details. However, I wouldn't run 10psi on the stock injectors, FMU and pump, so if the stuff you bought doesn't include upgrades for those I'd start with the stock pulley!!!
Water injection is a possibility, but not to my personal taste- I don't like to add extra consumables that you have to make sure you don't run out of. However, many people here use water injection.
You'll also find many informative posts on this subject in the archives, try the search function...
Later,
Mark.