roller rockers

[shadowbandit]

What the title said I'm in full swing of building my new motor and I need some help I'm building a stock bottom end n2o motor with heads and cam. And I need I'm getting my cam and heads from are good friend loyed. So guys what self eligning rockers are the best bag for the buck cause its a budget 10second build just like dirty bird

[SexyTransAm]

dont get cheap ass rockers IE: proform

[shadowbandit]

Well I was thinking scorpions

[Tyler Wheat]

I've had good luck with my Comp Pro Magnums. I would imagine the Ultra Pro Magnums would be the same. Heck, I had good luck with the Jegs or Summit (can't remember which one now) brand ones I had on my LT1 truck.

I'd check into forged pistons and rod bolts for your bottom end though.

[shadowbandit]

Why the forged rod bolts and pistons? I know they would make the bottom end stronger but I have another motor that is getting fully forged for boost ;)

[Tyler Wheat]

I would get them if you're going to spray a H/C car. Eventually a completely stock bottom end is gonna go boom with H/C + nitrous. Just a little insurance.

[shadowbandit]

Thanks never would have thought of that so now that were on that subject what piston would I want to go with and how would I know to.get the right one

[Bersaglieri]

Harland Sharp would be my choice for a budget rocker, scorpions are ok, but I've seen a few failures from them. I run Comp Stainless and Comp Ultra Pro Mags in my cars. Zero problems.

-Dustin-

[shadowbandit]

So what's the part number on the comp s/a roller rockers with the bolt ordering today

[Bersaglieri]

With the bolt? You mean poly locks? The part number depends on if you want 1.5/1.6/1.65/1.7 rockers, each build needs something different. Then you must decide on 3/8 or 7/16 rocker stud size. Then non self-aligning or self-aligning. I see you wrote SA, but is that what Lloyd recommends for what you're doing? The only draw back from NSA is the cost. I know you're on a budget but valvetrain isn't a place you should cut corners, I say go 7/16 studded NSA rockers of whatever ratio is necessary. I did 7/16-NSA rockers when I was just a bolt on guy and it's paid off since I didn't have to buy parts twice when I became more heavily modified.

I'm not saying SA rockers won't work, but NSA is going to keep everything much safer, especially at high RPM's.

-Dustin-

[McCauleyWB]

I second this ^. Lloyd usually recommends the Comp Ultra Pro Mags or Lunati VooDoo. Iam fond of the COMPs myself.

[shadowbandit]

Yea the comp ultra pro mags is what I want I just didn't know the part number to get them from

[Tyler Wheat]

63-1318-16

http://www.thunderracing.com/shop-by/vehicle/1993-1997-LT1-F-Body/Cylinder-Heads-and-Valvetrain/Rocker-Arms/

BTW, I do not endorse Thunder Racing anymore. They were pretty bad to a friend until he filed a Paypal dispute. I just found these easily. This should be what you need. I don't think they make the regular Pro-Magnums anymore. I'd be surprised if anyone had them. Its all Ultra Pro Magnum now. You want to find Ultra Pro Magnums that are 1.6 self-aligning for a 3/8 stud. Shouldn't be too hard to find.

[McCauleyWB]

I think they may have been on sale at Colorado Speed. Plus, they are offering free shipping for anything over $100 right now.

http://www.coloradospeed.com/general-motors-19931997-camaro-firebird-c-2902_359.html

[shadowbandit]

So what do u indors ultra or the magnums

[DIZMANGA]

Not to hijack your thread, but im confused. I thought it was best not to have self-aligning rockers for our cars because it caused valve float. Am I wrong or misinformed?

[SexyTransAm]

Not to hijack your thread, but im confused. I thought it was best not to have self-aligning rockers for our cars because it caused valve float. Am I wrong or misinformed?

never heard that

[zooguy]

valve float is caused by the springs ... if your springs are "weak" and dont snap shut and stay open on a cycle then that is valve float

[DIZMANGA]

I see. That makes sence. Not sure where I picked that up from, but thanks for clearing that up for me.

[shadowbandit]

Diz I can't see what u write

[DIZMANGA]

Oh Im sorry. I change the color of my text so it doesn't show up black. LOL I cant seam to get this right.

[thunderkyss]

Speaking of Rockers

Is it safe to install 1.7:1 rockers on a stock LT1?

[shadowbandit]

Ber if I run nsa rocker what would I need

[Bersaglieri]

Technically the only thing you need for NSA is guideplates. Factory rockers are self aligning, however, if the setup justifies upgrading to NSA, 7/16" rockers studs instead of factory 3/8" is typically on the table as well. If all you'll ever do it bolt ons with a stock cam or moderate cam 3/8" studs and/or SA rockers can suffice. It's really up to you.

When I did the rocker upgrade on my 1994 it did the full upgrade since I knew it was only a matter of time before I did a cam, heads, and eventually a heavy performance rebuild. So I went all out. Here's what you'd need:

Full roller rockers [both tip and fulcrum]: I bought used Comp Pro Mag 7/16" NSA rockers at the time. Be careful choosing the ratio, going to high could limit your camshaft choices later
Guideplates: I bought GMPP ones, but the pushrods wore into them. Not a good choice, so I upgraded to Isky adjustables for 5/16" pushrods
7/16 studs: If you've got rockers with 7/16" holes in them you'll need 7/16" studs. I use ARP's
Pushrods: When using guideplates you'll need hardened pushrods. Best practice would be to measure to see what pushrod length you need after the swap [especially if you changed the cam, lifters, head gasket, etc] and they buy a hardened pushrod of youre choice. I ran $20 Comp pushrods with my rocker swap, I believe they were PN 7808-16 7.200" length. One piece pushrods are going to cost more, but are better quality and stronger in most cases.
Valve Springs: If you upgrade to a higher rocker ratio on a stock camshaft you'll need to upgrade the valve springs. When I did my 1.6 rocker upgrade I installed a LT4 spring kit. It's a easy drop in kit for the LT1 and at the time they were going for $45 or so.

I think that's everything...

[shadowbandit]

Well loyed said 3/8 studs are fine with 1.6 rockers I think nsa is the way I'm going to go cause the car is getting sprayed. So I'm doing an le2 set up. Heads cam budget build so what nsa rockers would you guys do if I'm doing a 1.6

[Bersaglieri]

Rockers don't really care if the car is getting sprayed but get something that's made in the USA. Lot's of ebay specials have broke or spit bearings out. I like Harland Sharp for budget rockers, made in the USA, Ohio to be exact, and I'm pretty sure they have a lifetime warranty. I use Comp, but I'm pretty sure Crane, Crower, or anything else will give you what you need.

[shadowbandit]

Well if any one can point me in the right direction for guide plates and nsa rockers that are 1.6 and budget build friendly then I would thank u a ton

[Bersaglieri]

I made several suggestions, do you need a part number or ?

[shadowbandit]

Yes please and links

[Bersaglieri]

Narrow body Scoprions [3/8 stud, NSA, 1.6:1]: http://www.summitracing.com/parts/scc-scp1038bl/overview/make/chevrolet
Harland Sharps [3/8 stud, NSA, 1.6:1] http://www.summitracing.com/parts/csp-s1002/overview/make/chevrolet
Comp Ultra Mag [3/8 stud, NSA, 1.6:1] http://www.summitracing.com/parts/cca-1602-16/overview/make/chevrolet

Now the only possible problem I see using a stock stud is the fulcrum "straps" may or may not come close to hitting the "nut" part of the rocker stud. This is where the pushrod length needs to be considered. Some folks have had to run aftermarket studs regardless depending on the rockers. If you have to do that I'd go 7/16" for sure.

Isky adjustable 5/16 plates: http://www.summitracing.com/parts/isk-200-agp
Trickflow 5/16 "LT1" plates: http://www.summitracing.com/parts/tfs-30400624-8

Also here is Harlands page talking about the rockers: http://www.harlandsharp.com/sbc_38.htm

Remember when you go into a motor almost nothing is plug and play. If you just toss stuff in there without checking clearances and such it can really ruin your day. Double check everything. Sometimes you have to buy parts, find out they just won't work, return them and go another route.

[shadowbandit]

Thank you so much man how's the car

[Bersaglieri]

No problem, which one? I just got my DD car on the road, should be posting a thread about the build soon.

[shadowbandit]

The race car ;)

[Bersaglieri]

It hasn't blown up yet, but I'm working on it...

[Tyler Wheat]

It hasn't blown up yet, but I'm working on it...

Hahaha I love that quote!

[shadowbandit]

Haha nice just need more power

[Bersaglieri]

I'll be hooking up the gregrob one of these days, probably gregrob at least 150 shot.

[shadowbandit]

Yea that's what my cars going to get I just hope pistons hold up