HKPRO5's Supercharger Build Thread

[808MP5]

so did you find out what was wrong with the boost?

 

[HKPRO5]

yea its due to the size of the crank pulley. On the SLK is bigger=more boost

 

[fishdonotbounce]

Yea but so people dont get confused, a bigger crank pulley = more boost. Smaller SC pulley = more boost. And both of those vice versa

 

[HKPRO5]

So Im thinking of trying out a vortech pulley or even one of these.

http://cgi.ebay.com/ebaymotors/ws/e...0667823602&viewitem=&sspagename=STRK:MEWAX:IT

or
http://cgi.ebay.com/ebaymotors/ws/e...0470490201&viewitem=&sspagename=STRK:MEWAX:IT


The OEM Pulley size is 3.9 im sure if I go down to 3.5 or even 3.4 that should give me about 7psi.

 

[azuelke]

^ From what I've heard, ZZP is crap in the Grand Prix community, might want to go with the other.

 

[bedwards6954]

they won't work let me get pic
check out these pics in this thread
http://www.superchargersonline.com/forum/topic.asp?TOPIC_ID=4715

see the splines?!

check out this thread a mini truck with the same supercharger but with a smaller pulley
http://www.s10forum.com/forum/f105/m62-eaton-supercharger-update-sorta-208718/

 

[HKPRO5]

Hmm good info. Thanks.

So you dont want to share the specs on that ODP? lol

I really want to keep the clutch on the SC thats why.

 

[bedwards6954]

I need to get the file from my work computer, turn it into a PDf so you can read it then email it to you

 

[HKPRO5]

=) thank you!!!!!!!!

 

[HKPRO5]

So yesterday my coolant line (bottom) had a hole in it due to the heat/ rubbing against the header. I got that fixed.

I still have this hesitation problem at 3.5-4k AFRs go to 18 and if I keep on the gas the AFRs go back to normal.

Also after scouraging the internet I have finally found two sources for a smaller SC pulley. But I still would like to keep the clutch. (that means larger crank pulley)

 

[808MP5]

Hmm if you get a larger crank pulley wouldn you also have to get larger alternator, waterpump, and power steering pulleys. If not they will spin a lot faster than normal. Not sure if that's a bad thing or not. I'm just pissing in the wind here. But I do have a spare oem crank pulley if need be. Say if you want to experiment with it. I'm sure figuring out the math on changing pulley diameters isn't calculus.

 

[HKPRO5]

Oh cool. Ill probably need it later lol. Im still working things out though (math wise)

but So Far If I go smaller SC pulley itll be 2.75.

 

[HKPRO5]

http://www.ludicrous-speed.com/g2/main.php/v/OurRides/ShanesRide/mods/25RSC/SmoothFlowCustomPulley/

Found this site. (M62 used on a older model impreza) Emailing the guy about getting a smaller pulley.

 

[bedwards6954]

was swapped at work today, I should have the drawings for tomorrow, PM me your email please

if you go with a stock pulley its 4.5psi

with my overdrive pulley the only thing that was effected was powersteering pump

also ((Super Charger Disp/(1/2 Engine Displacement)) * Ratio * 14.7) - 14.7 = Boost Pressure

((2.0/(1/2*2.0))*5/3.76*14.7)-14.7=4.8psi

ratio is Crank pulley/supercharger pulley
supercharger pulley is 3.76
stock crank pulley is 5
my overdrive is 6.7

 

[HKPRO5]

You have a PM.

Thanks!

 

[azuelke]

^If you need one made, I might be able to talk to my boss, but it would be charged at shop rate. Let me know if you need some help getting it made.

 

[HKPRO5]

Nice I'll keep that in mind. I still haven't found a local shop that could do it. =(


Also still have the AFR problems.

 

[HKPRO5]

I think when I get the pulley made ill have them scale it down to 6.1 instead of 6.7

11.5 psi is a little much. lol

 

[rally2003]

Do it! Car sounds sick man, not a huge fan of superchargers, but that is pure titties.

 

[bedwards6954]

I just sent the email with the drawings, I would leave the 6.7 because those calcs are in a perfect world. it does not account for engine effeciency, cams timing, or atmospheric pressure I am in north Idaho and I only seen 9 to 10psi. a guy at see level may get 12.

there is a whole thing about supercharges and atmospheric pressure, if you drove a car from sea level to the high mountains, the supercharger would put out less PSI, a turbo will work harder to make the same PSI

I found this out when I couldn't figure out why my British friend was always getting more boost then me on the same setup.