jonbar87's H22 JRSC Build Thread

[ion_four]

Hey man,

I just read this and am really sorry to hear your engine went south on you.
You did some good work on this.
Catastrophic failure happens to the best of them.

Did you ever figure out why the engine ate it?

I have a similar set up and hit ~9psi in the mid range, but it falls off like yours
did before your upgrade. I thought the slippage was on the short belt, and
have tightened the piss out of it, and am now even running two 3-ribbed
gatorback belts to fill up the whole 6-ribs. I actually wouldn't recommend
this, because the belts are slightly different lengths and they can't be
optimally tightened. A 5-rib gatoback may be better because it can be
tightened evenly.

So, if the slippage is on the long belt...where did you get the idler pulley
(McMaster Carr?) Do you have a p/n?

The notched pulleys you found are intriguing as well. If people in the Ford
community say they solve the issue, then I might be willing to carve up some
of mine (and re-anodize them, even!)

[jonbar87]

Originally Posted by ion_four

Hey man,

I just read this and am really sorry to hear your engine went south on you.
You did some good work on this.
Catastrophic failure happens to the best of them.

Did you ever figure out why the engine ate it?

I have a similar set up and hit ~9psi in the mid range, but it falls off like yours
did before your upgrade. I thought the slippage was on the short belt, and
have tightened the piss out of it, and am now even running two 3-ribbed
gatorback belts to fill up the whole 6-ribs. I actually wouldn't recommend
this, because the belts are slightly different lengths and they can't be
optimally tightened. A 5-rib gatoback may be better because it can be
tightened evenly.

So, if the slippage is on the long belt...where did you get the idler pulley
(McMaster Carr?) Do you have a p/n?

The notched pulleys you found are intriguing as well. If people in the Ford
community say they solve the issue, then I might be willing to carve up some
of mine (and re-anodize them, even!)

Actually I don't really know where the extra pulley came from...I got it from the guy who I bought it from who said he got it from Jackson racing...so maybe try them? don't know if they are still selling the pullies though.

The belt slip issue was always a problem for me. Hope you can figure something out!

[geramy]

High Performance Parts and Accessories at JacksonRacing.com

that is where you get the extra pulley from. Just find the part number in the instructions and then order it by part number from the site, think its between $20-30.

-G

[ion_four]

Originally Posted by geramy

High Performance Parts and Accessories at JacksonRacing.com

that is where you get the extra pulley from. Just find the part number in the instructions and then order it by part number from the site, think its between $20-30.

-G

Thanks, Geramy. That website actually has them listed under the main Prelude page (along with belts) and they can be ordered online. However, the smooth pulleys are $35/piece and the grooved one is $82! Outrageous pricing, considering ungrooved in similar dimensions is $9, here: McMaster-Carr

In other news, I just started getting some terrible sounds yesterday and decided to check my jackshaft bearings. I could wiggle the shaft with my fingers. Oops.

I picked up some new bearings at the store and didn't make it four blocks before the current bearing totally ate itself and the pulley seized! Since I stupidly had no tools, aside from a pocket knife, I cut the belt and drove home on the battery. I'll probably be making a thread on replacing these bearings, today. I'm halfway done and it hasn't been so bad. The bearings I got are cheap-o made in china, so I may try to source some NSKs (which were the originals. P/N 6203V, if anyone is interested.)

[ion_four]

Originally Posted by jonbar87

Actually I don't really know where the extra pulley came from...I got it from the guy who I bought it from who said he got it from Jackson racing...so maybe try them? don't know if they are still selling the pullies though.

The belt slip issue was always a problem for me. Hope you can figure something out!

Just to clarify, since you say it was always a problem...adding the pulley did solve the issue, right? Or was it not permanent? The jackshaft pulley which is run by the long belt is the same size as the one that runs the short belt, but the one run by the long belt has less belt touching it, at present. The least contact area of any of the drive belts.

[jonbar87]

Well as far as I could tell (one can never know whether it's the short or long belt slipping) I was able to stop the long belt from slipping by adding that extra pulley, but I *think* the short one would also slip sometimes...? It was odd...sometimes it would barely hold 7psi...then I could go out the next day and not even touch it and it would hold 10psi all day. I know there are some variables such as humidity/temp/ect., but I don't think they'd affect it that much. who knows...

[ion_four]

jonbar, It is hard to tell which belt is slipping. I figured it was the short belt, as most
people seem to think, but (as I confusingly said before) the jackshaft pulley for
the long belt has the least contact area, so that should be the most likely to
slip!

I ordered an idler pulley along with some high speed/load bearings to replace the
ones in the jackshaft...I don't want to waste my time with the cheapo ones.
Of course, now I realize that the idler pulley didn't have a speed spec for
it...hopefully it won't pop too soon

Geramy, I recall reading that you (or was it someone else?) had idler pulleys
made or modified to be able to swap the bearings? I'd love more info on that
since some of mine appear to be pretty worn, too.