Gonna run a solid roller cam, gonna run an electric water pump, gonna run a 95 and later opti, NEED a double roller timing chain. Do I need to buy a cam for a "LT1" application? Or an old style small block cam without the stepdown on front? And which chain? and who makes a retainer "button" for the old stlye to work with an "opti" timing cover?


Thanks
David

 

You have to run a LT1 style cam if you are going to run a opti. You could have the front of a SBC cam drilled to accept a opti, but it wouldn't work with the cam retention plate. The easiest bet is to get a LT1 specific cam.

As for Double rollers and timing chains on the LT1, you can use a double roller like a Cloyes or the GM Xtreme duty timing chain set. The double roller will need some clearancing for the double roller to fit under the timing cover.

If you are looking for a solid roller cam for a LT1, all you have to do is custom order one. All of the Comp Cams depending on the last number in the part number are the same price if they are custom or not.

A cast core cam solid roller or hyd roller like a 12-306-8 is the same price as a custom grind cam.

So a custom 12-000-8 (custom grind) Solid Roller is going to cost the same as the off the shelf CC306 Hyd Roller.

If you step up to a billet core then you are going to change the last digit of the camshaft to a 9. That is going to add about $50+ to the price of the camshaft.

BTW is your pops Larry by chance. That sig looks familar. I'm not 100% sure if Crower makes a LT1 Billet core to start from. I know they have some cams on page 35 of their catalog for LT1's, and knowing Crower if they don't have it they can make it.

Bret

 

Bret,
Thats my boy.
I was telling him about running an early double chain and what the dif was.
Yea Crower will make anything I want in billet.
I allready have the LT-4 extreme duty chain set and don't now about the strength with our set up? Breakage could ruin your whole day!!!! It is not a roller or double row.

Racerdude

Another pair of Nike.

 

Make sure Those Crower boys know how much rocker you want to throw at this thing, cause those lobes have to like alot of rocker arm to work. Between .650-.700 is all the lift you can realistically get with the duration you guys talked about.

The double roller is not to hard, just clearance that timing cover really well and check the camshaft endplay and you guys will be o.k.

Dave, listen to your old man he's gotta lot of knowledge in there! Number one rule I learned a long time ago, and it worked for me!

Bret

 

We are going to throw them open quick and high and Crower says it is do able.

THANKS FOR THE COMPLEMENT.

Racerdude

 

Yeh Bret thats my Pops, he has his poop in a group. Cant wait for this car to back out into the street, gonna be fun!


David

 

I've run the Extreme Duty setup with some fairly heavy spring pressure and a .600 lift solid roller, although a fairly mild grind. I know Baxter used the Extreme Duty set for his 1,125HP solid roller 381 blower motor - another relatively mild grind, but lots of lift. The chain on the LT4 Extreme Duty is PN 14082470, and its a "roller", but not double, only single.

 

Thanks for the info.
We have the Cloyes LT-4 heavy duty chain now.It has the same ID markings and numbers on the sprockets as the GM LT-4 extreme duty.
I am going to call Cloyes,just to make sure this set IS what it appears to be.(Isent the GM one back).
We won't make quite 1000+HP,but it is nice to know the unit will take the pressure. Breakage WILL ruin your whole day and many days thereafter!!!
Thanks again for your input.

Racerdude


Another pair of Nikes.

 

I use the Cloyes double roller on my LT1, didn't have to clearance the cover, been runnin for 2 years no problem.

 

Dave, I have a feeling I'm going to crap my pants when I hear your Z run.

It's going to be nasty I'm sure....