Rip cut a supercharger pulley - got some boost back!
#1
Rip cut a supercharger pulley - got some boost back!
I found another legitimate use for my milling machine - to slash cut supercharger pulleys! I did this for a friend and he got between 1.5 and 2.5 lbs of boost back. We'll find out if it totally took care of the belt slip issue when he dynos it.
It was a fun and easy project. I'll post back when I find out how it held up on the dyno.
It was a fun and easy project. I'll post back when I find out how it held up on the dyno.
Last edited by FastKat; 07-10-2014 at 05:11 PM.
#2
Interesting. I wonder if relief cutting on one side of the channel you milled will allow the belt to dig into the groves you cut some more.
I came across this link when I googled what you were trying to accomplish with the mill groves. Has some good info on how to reduce slip.
http://beltslipsolutions.blogspot.com/
I came across this link when I googled what you were trying to accomplish with the mill groves. Has some good info on how to reduce slip.
http://beltslipsolutions.blogspot.com/
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#10
Thanks for bringing this up. I just searched and found the patent. I don't want to get into it here but I think what I am doing is substantially different.
Oddly, the Reichard patent talks about extending belt life. What I did here does not have those features.
I should know more accurate results this coming week!
Oddly, the Reichard patent talks about extending belt life. What I did here does not have those features.
I should know more accurate results this coming week!
#15
9 Second Club
The slots and holes are allegedly to prevent air getting trapped under the belt, which in turn can lead to reduced grip.
Which given the belt/pulley speeds involved, is plausible.
Reality ?? call Mythbusters
#17
8 Second Truck Club
iTrader: (32)
The thing about Reichard is that they never answer the phone and don't sell these on a consistent basis. I believe they have government contracts that keep them busy and $$$. From what I heard, he has no interest in doing these anymore. Hence the reason I'll never sell the one I've got. I assume most feel the same, that is why you hardly ever see them for sale. It took months to get mine direct from him back in 2009.
If you find one, ****** it up.
If you find one, ****** it up.
#18
UNDER PRESSURE MOD
iTrader: (19)
The thing about Reichard is that they never answer the phone and don't sell these on a consistent basis. I believe they have government contracts that keep them busy and $$$. From what I heard, he has no interest in doing these anymore. Hence the reason I'll never sell the one I've got. I assume most feel the same, that is why you hardly ever see them for sale. It took months to get mine direct from him back in 2009.
If you find one, ****** it up.
If you find one, ****** it up.
#19
UPDATE: After a street tune, the rip cut 2.38 pulley is now holding a peak 18.5 lbs with an overdrive crank pulley and Metco idlers, as logged with HPTuners. I think the overdrive crank pulley is a 10.5 or something like that.
Hopefully he'll have some dyno results later in the week.
It looks like I got the earlier data wrong. With the stock crank pulley: Before the rip cuts on the 2.38 pulley, the supercharger peaked at 14.2 and dropped to about 11 lbs. With the rip cuts on the 2.38 pulley, it peaks at 14.9 and holds it out much longer, eventually dropping to 12.9 lbs.
If it'll hold 18.5 lbs, I imagine holding 14 lbs without slip should be a breeze.
Hopefully he'll have some dyno results later in the week.
It looks like I got the earlier data wrong. With the stock crank pulley: Before the rip cuts on the 2.38 pulley, the supercharger peaked at 14.2 and dropped to about 11 lbs. With the rip cuts on the 2.38 pulley, it peaks at 14.9 and holds it out much longer, eventually dropping to 12.9 lbs.
If it'll hold 18.5 lbs, I imagine holding 14 lbs without slip should be a breeze.