Sgtblue

iTrader: (16)

I finally had some quality time to spend at my shop today and among other things, installed David's idler pulley I got a couple of weeks ago.
As background, last winter I did a pretty comprehensive rebuild and emissions delete following a coolant seal failure at 87k. Also installed a PFC along with some other things. I occasionally autocross my car, but it's primarily street driven, so I wanted to delete the AP but avoid moving to oversized pulleys to keep belt contact. My rationale was discussed in this thread https://www.rx7club.com/3rd-generation-specific-1993-2002-16/pictures-pineapple-airpump-elimination-pulley-716884/ .
It was also in that thread that I discovered that Mr. Garfinkle intended to make some pulleys. Being familiar with the quality of his other products (also have his pan brace) I waited and think it paid off.

Personal preference here, but I liked David's design, particularly how it was adjustable just like the AP was. He also used dual arms on the main shaft which should eliminate any chance of deflection. The pulley itself is aluminum on a stout steel arm and supports. The downside (if you call it that) is that you must paint or powdercoat the arms and shaft. Not a big deal. What you see below is just some rattle can metallic silver that I had sitting on a shelf, over self-etching primer. Also this pulley is ONLY good for someone running twins.

Just setting it in and aligning the pulley with the WP and Alternator. It's easier if you mark the shaft for arm placement BEFORE you paint or powercoat.




Just a shot straight-on before I re-installed my IC that shows how blingy the pulley is. In addition to about a 10 or 12 lbs. weight savings, I'll have alittle more room and hopefully a little better airflow. In any event, it looks infinitely better than that old AP that I had sitting in it's place all last summer.

jhcrazyboi

iTrader: (7)

WoW i like that setup of that idler pully. How much that setup cost you?

Sgtblue

iTrader: (16)

PM'd you.

no_more_rice

looks great...the one in the group buy section only has a single supporting arm

Chadwick

iTrader: (12)

David’s is a nice unit and the adjustment is awesome, we went different routes to accomplish the same thing. If you like his design, by all means buy it, you won’t be dissatisfied. Garfinkle makes some great stuff and always stands behind his product.

Since you call out my design I have to mention that it has 2 solid attachment points, only weigh 2 lbs with the belt and if you can defect 3/4" aluminum and a 1" stainless steel shaft by tighten the belt you will have other things to worry about.

On a different note, Garfinkle’s Oil Pan Brace is the best one on the market, from an engineer prospective the last thing you want to do is apply the entire load to the ridges in the oil pan like most the other pan braces do.

Dan

Sgtblue

iTrader: (16)

Agreed, and thanks Dan. I didn't mean for the thread to be critical of yours or the others in any way. Personal preference.

Maybe the larger point is that if your running oversized pulleys only because you've removed the AP.....idler pulleys are available and a great alternative to avoid slippage and all the other potential issues, some of which you've pointed out.

TimeMachine

iTrader: (10)

I can verify the heavy-duty nature of Dan's piece. For whatever that's worth... which is nothing. Two means to an end...

spoolage

iTrader: (2)

Already mentioned in the first post --- sucks you cant use something like that with a single turbo setup.

prrex4ever

iTrader: (3)

There's a group buy here on the forum that has a kit for single turbo.