Looks great Andy, nice work.
I am very interested to see the final product and the dyno results.
Good luck with it!
Daryl
----- Original Message -----
From: "andycost" <andycost@earthlink.net>
To: <datsun-roadsters@autox.team.net>
Sent: Wednesday, March 29, 2006 8:19 PM
Subject: Progress on the Supercharger (long)
> New photos here:
> http://community.webshots.com/album/267887557HfboLz/4
>
> I played hooky from work today and got some work done on the supercharger
> for
> my KA24DE. I am installing an Eaton M62 from a Nissan Xterra. It was
> originally designed for a V6 with a plenum. I am having to make some
> modifications to it to get it to work on the KA24DE.
>
> First off I had to make an adaptor to mount it to the KA intake manifold.
> The
> KA intake manifold is two pieces and I am going to remove the throttle
> body
> half. The supercharger has a built in recirculating valve. I had to cut
> the
> housing from around the recirculating valve. In the Xterra the housing
> seals
> against the plenum. I don't have a plenum so I modified the housing so
> that
> the internal area of the supercharger is it's own plenum.
>
> A recirculating valve is like a blowoff valve. When you close the
> throttle
> between shifts an enormous amount of vacuum (or pressure) is created by
> the
> blower. The vacuum must be vented to keep from breaking things. The
> recirculating valve is vacuum activated and vents air from one side of the
> blower to the other. It basically lets the air recirculate through the
> blower. In many cars there is a blowoff valve that does the same thing
> but it
> vents to the atmosphere. That won't work too well with the Xterra or my
> KA24DE because the mass air sensor would measure the air vented and add
> fuel
> to compensate. After every shift it would go way rich.
>
> I also made an adaptor plate to attach the throttle body to the side of
> the
> supercharger. The throttle body has four bolts to hold it on and one of
> them
> will match up to a tapped hole in the supercharger. I will port match the
> throttle body, adaptor, and supercharger housing.
>
> I am going to use the alternator as the tensioner for the supercharger
> belt.
> The Suzuki Swift alternator that I am using came with a 3 groove
> serpentine
> pulley. The crank pulley has four grooves and the supercharger has 6
> grooves.
> I went to the alternator rebuilder today and bought a used 4 groove
> pulley. I
> hope that a 4 groove belt will be enough to drive the supercharger. I am
> using the power steering pump as the tensioner for the water pump belt. I
> plan on installing a power rack in the future and maybe a hydroboost unit.
>
> Next on the agenda is to get the ECU setup with the BikiRom, install a set
> of
> 370cc injectors, and get the water injection plumbed in. After that I'm
> going
> to the engine dyno for some tuning. I found that the automatic trannies
> have
> a removable bell housing. I found a guy in Atlanta that has a spare
> bellhousing for sale. I need the bell housing to bolt the motor to the
> dyno.
>
> Catch you later,
>
>
> Andy Cost
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