ok so i put a cc 305 in my lt1... i wanna replace my stock rocker arms with some roller rockers....i called comp cams and they said that they recommend pn# 1015-16 Ive been searching on here and found out that people like the pro-mags??? im so confused on this subject.... what about 1.6rr...if i use 1.6 rr will i have to get new valve covers..and will my pistons still clear the valves? my engine is .30 over btw.. can someone just give me a link to some good rr's that will work with my motor. i already have a set of replacement stock push rods from comp cams. if i go with a 1.6rr compared to a 1.5 will i have to get new push rods?? i need some light shed on this guys....please help

 

Even with 1.5 roller rockers i had to get new pushrods due to the rockers being taller and creating more distance. Also if your unsure you have to have a certain clearance as outlined in the haynes manual which you definately need to purchase at you nearest parts dealer store. This is a must have and explains all of your questions in detail. I had to get new valve covers when i went with roller rockers due to height. Also the bore is not going to matter you have to measure the distance from the tops of the pistons not side to side so the bore means nothing. And as for my pushrods i had to get the 7.2 inch comp cams pushrods with my 1.5 roller rockers. I think the factory ones were 7.195 inch. Anyway id use the old pushrods first and measure them due to wear over the years before i installed them with your 1.6 roller rockers and see where your clearances are and then you will know what lenght you need and who knows factory might work i dont know i have the 1.5. Anyway the haynes manual is about twenty bucks you should do some reading before diving into projects man because knowledge is power.

 

We need some more info on your car man. Sounds to me like you have an aftermarket cam, with a completely stock valvetrain otherwise. You're .30 over, but are running stock unported heads. Are you running a 355 or a 383? I'm not really sure what you're trying to do. What are your goals? What parts do you currently have installed in and on the engine right now?

 

Do you need self-aligning or non-self-aligning rockers? Do you prefer the narrow-body aluminum rockers, which is what CC recommended, or are you looking for steel? What kind of RPM is the engine capable of? Appears you don't know if you want 1.5X or 1.6X? How much gross lift can your springs handle? Since you changed pistons (0.030" over), are the pistons flat with valve reliefs, dished, etc? How do you plan to check PTV clearance, which is critical?

Seems like way too many unknowns for this stage of the assembly process.

Your pushrod length can only be detemined after you have all the parts together, using a pushrod length checker. The objective is to keep the tip of the roller centered over the valve tip. Most stud mounted rockers seem to fit under the stock valve covers with minor modifications to the cover internals.

 

To add to what Fred said, you don't usually need to buy new valve covers as the stockers can be clearanced to a certain extent (I know for a fact stockers work with pro mags). Search this forum and you'll find a how-to with pictures.
As far as SA and NSA rockers, I've had both and I suggest NSA because they are quieter (use guides!!) and they seemed to be more reliable in my experience. Search this topic beause, it too, has been beat to death. Pro mags are a popular choice among members here but once again, there are a lot of unknown variables you have to figure out

 

ok so heres the deal......stock heads unported with new comp cams cca-26915-16 beehive springs.... the crank is stock so its a 355 with flat top/bottom pistons with valve reliefs i have a comp cams 07-305-8 cam with new lifters...i have stock rockers installed rite now with new comp cams stock length replacement pushrods "non hardened"...the engine is only going to see street driving and maybe a little hod rodding on the freeway. and as far as sa on nsa idk...my engine has been outta my car for a month and its finally assembled when my mechanic said to go with rr's...id like to change as little parts as possible... and as far as what type of rr's whatever works best with stock valve covers is what im looking for... i dont care if i have to clearance the valve covers ill do it...i just need to get the engine back in my car before i leave...and 1.5vs1.6 idc...anythings gotta be better than the stock rockers rite?

 

The 1.6 RR will increase your valve lift from .510/.510 to .544/.544. Now as long as the valve springs have an installed height >= 1.744, you will be fine in that aspect. As far as PTV clearance, I would *assume* you would be fine in that aspect since its basically a stock-style setup.

Something that throws up a flag to me though is the fact you already have "stock length pushrods" and you haven't decided on which rockers you are going to use yet. You MUST check for proper pushrod length AFTER all the other variables are CHOSEN and INSTALLED. There are no exceptions to this... even if you copied XXX's exact setup, you STILL need to check for proper length because what is best for one may not be the best for another. Think about it; you have changed the cam, lifters, rockers, springs, etc. ...the chance that the most efficient pushrod is still the same length as stock is less than I would want to take. (and im a gambler )

EDIT: Personally, I wouldnt even use a "non-hardened pushrod" in a 100% stock motor. The valvetrain isn't the place to cut corners.

 

well like i said my motor is already assembled....my mechanic told me yesterday to go with rr's.....so if i go with sa 1.6's how would i find the rite pushrod lenght? also here is the link to my springs

http://www.summitracing.com/parts/CCA-26915-16/

i dont know if i can use 1.6's if not can i still use 1.5rr

 

Read this:

http://www.compcams.com/information/Products/Pushrods/

 

ok so now i need to know.... sa or nsa and also 1.5 or 1.6?? so if i go with sa 1.5 i can get away with only possibly changing the push rods rite? i dont think my springs will hold the 1.6's...

 

I did the math for you... 1.6's are fine... reread my post.

 

ok so what rockers should i order from summit? i want the 1.6's and i guess ill have to get new hardened push rods ..... would these work


http://www.summitracing.com/parts/CCA-1318-16/

the only problem i have heard of with these is that there super loud.....i hate engine noise! im only using the car for street use/racing and not revving it super high or anything...should i go with the pro mags or an aluminum rr....if aluminum what brand? i heard the comp aluminum's are good but scorpion is better? what are your opinions?

heres the scorpions i found...are these the rite ones and how do they compare to the comps?

http://www.summitracing.com/parts/SCC-SCP1036BL/


i want the self aligning ones so i dont need guide plates... so what is my installed height i could not find it? and am i pushing it with these springs? or are these more than big enough for my application.... thanks for all your help


almost forgot how can i check my ptv now? could i just put it together with the 1.6's and turn it over by hand to check for any issues or maybe stick something through the spark plug hole? i did have the heads milled but the machine shop guy said he barely milled them since they weren't too warped... also i used felpro 1074 head gaskets if that helps

 

I love my 1.6 pro mags. I've got a set of SA since they were for sale cheap when I needed 'em. Check the for sale section on here and Ls1tech, I'm pretty sure I just seen a set for sale for like 185ish if I remember right. The promags are hit or miss on sound.. Some say they are really quite, some say they sound like a sewing machine.. I think they sound like a sewing machine.. Which I have no problem with.

 

It's becoming real popular to run LS1 Beehives with 1.6rr I'd look into that, especially with a cc305 cam. My friend finished his last summer and I've working on mine this summer. (Mine is still stock cam). Running the Beehives is kinda complicated to do because the hardest thing is getting correct guide plates (if you go NSA) and a valve spring compressor tool that will work with the LS1 springs due to height.

 

so is like a crazy loud noise that sounds like a bad lifter tick? i didnt have time to waste and i ordered the scorpions... i really dont like under hood noise...its trips me the hell out....but am i ok to use the springs i listed above with the 1.6's