Re: align bored aluminum mains timing chain??
[Re: fiddlestix]
#860871
11/22/10 08:33 PM
11/22/10 08:33 PM
|
Joined: Nov 2004
Posts: 3,544 Syracuse,NY
CompWedgeEngines
master
|
master
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
|
The aluminum caps should have nothing to do with "needing" a shorter chain. A normal align hone wont bother it much. They should be able to favor the cap side, and leave the block for minor boring, and as mentioned above, not need anything special for the chain.
RIP Monte Smith
Your work is a reflection of yourself, autograph it with quality.
WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
|
|
|
Re: align bored aluminum mains timing chain??
[Re: fiddlestix]
#860877
11/22/10 10:51 PM
11/22/10 10:51 PM
|
Joined: Jul 2010
Posts: 2,091 Delray beach, Florida
Performance Only
top fuel
|
top fuel
Joined: Jul 2010
Posts: 2,091
Delray beach, Florida
|
i prefer the Pro-Gear timing sets. they hold up well, even with heavy spring loads and use better than average components to make their sets.
Wize, what equipment are you using to check the cam/crank centerline positions? just curious because i know a lot of guys see the core shift where the cam "looks" off center because the cam bore isn't in the middle of the casting. i've had a couple of those in the CNC this past week and they were actually pretty darn close, even though they didn't "look" like they would be.
machine shop owner and engine builder
|
|
|
Re: align bored aluminum mains timing chain??
[Re: Performance Only]
#860878
11/22/10 11:20 PM
11/22/10 11:20 PM
|
Joined: Jan 2003
Posts: 9,872 Weddington, N.C.
Streetwize
master
|
master
Joined: Jan 2003
Posts: 9,872
Weddington, N.C.
|
'Eyeball' equipment and most often times test rolling (checking the drag by feel) just the cam/crank and t/c (which I always do anyway) Good to hear that you've found them better than they appear. But I"m sure you've seen the blocks that visually look a 'little' off and there are some that look like Stevie Wonder was on QC duty that night at the foundry. Lots of times though they tend to get built because that block happens to be the one the customer had. There's seemingly no rhyme or reason for the 'bad bad' ones, I've seen them all years from the early 60's to the late 70's. I figure with the cam only turning 1/2 the crank speed it probably just wears the cam bearings (and possibly the T/C set)out a little concentrically but I've always wondered if and how it could also (slightly) adversely effect the cam timing from bank to bank. I know you've done a lot of work in that regard. come to think of it I think the last RB (the 508 that Paul has now) had a Pro-gear (hughes) and yeah I agree that was a very good set as well.
|
|
|
Re: align bored aluminum mains timing chain??
[Re: Streetwize]
#860879
11/23/10 12:00 AM
11/23/10 12:00 AM
|
Joined: Jul 2010
Posts: 2,091 Delray beach, Florida
Performance Only
top fuel
|
top fuel
Joined: Jul 2010
Posts: 2,091
Delray beach, Florida
|
when it comes to timing chains, we use mostly Pro-gear. we've been selling that brand for a number of years now and i've been super happy with them.
not to hijack the post, but some of the things i've seen on the factory blocks would make anyone understand why they typically were worn out by 60K miles. they're great foundations but the QC was fair at best.
machine shop owner and engine builder
|
|
|
|
|