I'm about one week away from getting my motor reworked. I'm installing the LT4 HOT cam kit and need to know what timing chain set I should be looking for.

What chain set (I guess I need the gears too) is compatable with my motor...it's a L98?

What are the LT4 HOT cam people using?

 

On my L98 I used a Cloyes 3-way timing set which included both gears and a double-row roller chain. $80 or so from Summit, make sure you specify you want the one for SB Chevy w/ factory roller cam...the cam gear bolt pattern is different than pre-roller cams.

You reuse the thrust plate which bolts to the front of the block behind the cam gear, no mods needed w/ the HOT cam.

Make sure and have the machinist install new cam bearings, good practice.

 

I used the GMPP single roller HD timing set (p/n 12371043). Was about $40 from the dealer my price. It may be a single roller set, but the thing is about the size of most of the doubles I have seen. Oh, no problems at all with it on my engine . It is for factory roller engines.

 

I used the GMPP timing chain set as well and as stated as before it seems very heavy duty and a good piece.

 

Thanks for the replies...I went with a Cloyes timing set from Summit. It was much less $$$ than GMPP

 

Yeah dealer stuff is quality but I get a discount like the other guy stated above said too. Without a discount it can sometimes be probibitively expensive and better to just go aftermarket and get a quality product like you did there. Good luck

 

Make sure you get a timing chain/gears for an LT1/LT4 type cam.
Because the L98 is different.

 

I was worried that might be the case when I built my engine in 1998, measured my L98 cam and the LT4-HOT cam and the bolt patterns are identical. The machined step up front for the thrust plate is identical.

Go read a book or something instead of giving out bad advice.

 

Right, the set I bought (Cloyes Roller Setup) fits my LT4 HOT cam with no trouble.

 

When I was building my motor , I ordered a chain set, from Jegs, for an L98 as well. It was a wrong one. Perhaps they sent me a wrong set, I don't know. I told the guy I had an LT4 cam and I got the right set afterwards. I did not compare the 2 cams; regardless my advice is still valid either way you look at it.

So go ahead and stick a book up your ***, punk. Preferably a hard cover.

 

Hey man, I didn't mean anything by what I said. I appreciate all the info I can get. Your post made me question the shop who's doing some machine work to my motor (about proper fit to my LT4 HOT cam). It looks like the timing kit I bought will work, but it's something for me to keep in mind in the future. Thanks for the post.

 

My comment wasn't geared toward you. It was the other guy who told me to read a book. I was just speaking from my own experience.

 

Or lack thereof.

It sounds like Jegs sent you a pre-'87 timing set designed for the older hydraulic flat-tappet cam. The cam gear bolt pattern is definitely different than the newer hydraulic roller cam design.

No need to thank me, dude. People like me are here to prevent people like you from messing up people like the guy who asked.

 

So you are saying the 350 motors in use prior to '87 are not L98's?

 

One thing to watch is the dowel pin on the Hot Cam, IIRC it needs to be pushed in a bit to keep it from rubbing on the timing cover.

Yes pre 87 350 TPI are L98, however pre 87 are non roller blocks, with 2 piece rear main seals.

 

You can also cut it to the appropriate length.



Exactly. So when kevinc posted:

He was only partially right, therefore also spreading his own brand of 'misinformation'. Maybe he should go read a book? LOL!