Djbrand1

I have a 88 944 Turbo S that I bought some 968 Castor blocks for from the consensus of the online forums that they will be an upgrade. Less rubber than the older style should hold alignment better on the track. Seems reasonable. The car is over at a pretty reputable shop that specializes in 944/951/968's, they told me that they actually prefer the older style which is on my car now. I value their opinion as they setup a lot of track cars and I am no expert, but it seems to contradict the overwhelming bias on the forums that the 968 blocks should be an upgrade. Any thoughts??

Dougs951

Did they give a reason?

Not disagreeing just curious.

Djbrand1

They said the older style with more rubber is better than 968 that actually has some gaps in the rubber. Which I understand, but the 968 have way less rubber overall.

Scott H

I bought the elephant racing castor blocks in "sport" stiffness. Best of both worlds, and no holes in the rubber.

ehall

They are wrong. Yes there is less rubber. THAT is a good thing. Just tell them to put them on a shut up. You don't want movement in your caster. Get it aligned to specs and don't mess with it.

Julian Allen

They are wrong. The complete package includes the 968 caster eccentric, which has serrations to "bite" at the alignment setting and hold it better (951 341 431 03, about $85-90 each new). The package allows factory blessing for using 18" wheels. 'Nuff said.

odurandina

zims had the bushings for $55 last summer. i picked up two pair.

ehall

...and that is useful how?

schip43

Yep what those guys said! The only reason I could think of for using the originals would be, maybe less Noise Harness and Vibration?
If these guys race do they ever win?

mikey_audiogeek

+1. The 968 caster eccentric also appears to be machined from billet, it's a much nicer looking piece.

EDIT: By 968 caster eccentric I mean the current 951 341 431 03 part. I bought mine from Sunset Porsche in Oct 2009. They are fully machined, no cast or forged surfaces remain.

Julian Allen

I think they are machined forgings (you can see a part number on the flats of the adjustment blade). But they are nice pieces!!

Crazy Eddie

If you are not going to put them on I may be interested in buying them
What I heard, is that they should be used when going to a bigger wheel ... i.e. 18 inch wheels
good luck
Regards
Ed

Djbrand1

I run the stock 16" club sports for the track. I got the blocks but didn't know there was a different pin to use with them. :/ The shop said since the car is a Turbo S, it had the Turbo Cup bushings in it already. I'll try to get the part number off them.

reno808

LMAO

Oddjob

You do not need a different eccentric pin/bolt for the 968 blocks vs the 951 blocks - same part number. Ive replaced 4 sets of 944/951 castor blocks with 968 blocks and there is no issue with the existing eccentric bolts.

The Turbo S M030 castor block does have a -30 part number, which the -30 series suffix may indicate it came from the motorsports department and was developed for the Cup cars (many of the unique motorsport suspension parts on the cups had -3x part numbers). But, although a harder durometer than the stock piece, its still a big chunk of rubber. Most agree that the 968 part is a superior design and have replaced original blocks w/ the 968 part, including turbo S/M030 cars.

If your original M030 rubber blocks are in good condition, leave them on. If the rubber is starting to tear they need to be replaced. Since you already have the 968 blocks, put those on. And I think the M030 blocks are quite a bit more expensive than the 968 blocks.