Thread: Which timing chain?

you wont need a double unless you go with 130# springs or above.

for your setup the stocker will work. but...the double is added protection....

I read some were when installing the double chain,
you must also do some work on the inside cover
were the chain will rub .....
I'm sure someone that has done this will jump in to
explain this better..

John

you have 2 options when it comes to it. I chose the second.....

1. add 2 gaskets to the front cover..this will space it away from the oil pump plate.

2. machine the oil pump plate and bolts down .002 to avoid contact with the chain.

I was lucky enough to buy a machined plate from FlynGTP in chicago. he has a machine shop shave them down for him....

There also was a huge discussion on the other site about some issues with the double roller as well. I believe Rollmaster has a single chain replacement that might be a bit better than the OEM one, Im not sure.

I chose the JP single roller, but if I had to do over I would have gone stock. Most of this is because of more recent discussions about the Rollmaster and JP wearing ridges in the tensioner versus the stock chain. The other thing brought to light in a thread here, is that the Rollmaster with the timing on 0 will retard the cam timing on an L67 as it was designed for and L36. It appears the JP is the same. I guess knowing this you could advance them 2* to compensate...fwiw this is from others who know what they're talking about, and not me.

Originally Posted by UR LOSN

machine the oil pump plate and bolts down .020 to avoid contact with the chain.

its gotta be machined down 20 thousandths.

the jp is a better chain compared to the rollmaster, a few less have broken or caused problems. i would just get the double roller to begin with since you will never have to crack open the front cover again for the pure fact that the tensioner is gone.

sorry, I typed it too fast. you are rigth with the correction.

with the ls6 springs, i HIGHLY recommend a dual chain.

final seat pressure is somewhere in the neighborhood of 130#, due to the fact that they are a progressive rate spring.

if you want to stick with the stock timing chain, get a whole new set( i have a 2000 mile set if you want it) and stick with some 105#'s

I'm getting a double set-up also...just want something in there that will last longer than stock, and keep it's strength. I havn't heard anything about the double roller stretching?

a couple people have broken doubles with a lot of horsepower or it rubbing on the oil pump cover. stretching doesnt seem to be a problem that often either.

Originally Posted by Bio248

a couple people have broken doubles with a lot of horsepower or it rubbing on the oil pump cover. stretching doesnt seem to be a problem that often either.

So will I have a problem when I do the upgraded cam and springs?

Which I will be well above....that's why I'm worried now

Check out my sig.....you don't run 118mph on street tires with a stock GTP!

Okay, Im not feeling any love here guys, you're raining on my parade, LOL

I was planing on getting LS6 springs for my Comp Cams 1.7 Roller Rockers. But now Im reading that if I do that I need a double roller which I am just NOT going to do, staying with a single roller or OEM chain was one of the major deciding factors in staying with the lower ration rockers, that and I want roller rockers for a slightly different reason than most and it also leaves the door open for a mild cam should I ever decide to go that route.

So, that stated, what spring do I need with these 1.7's. I have 117k on the engine, so Im dead set on replacing the springs. Now, do I need new or low mileage stock springs or what aftermarket spring do I need?

I just want to be absolutely sure I dont get valve float now or in the future but I want to stay away from the double roller. If I cant run the 1.7's without going to a double roller chain then I might as well put them, the comp cam push rods and next to new lifters I have up for sale.

Sorry man, didn't mean to hijack...I'm just in the same boat and need some info