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04-15-2013
I'm planning to put my stage 4 heads on soon, and since I bought some yella terra 1.8's with stok replacement PR's I really don't want to buy another set, much less have te downtime of ordering another set. Are the spacers that ZZP sells any good? If it properly and reliably fixes the issue with the longer valves, I have no issue with buying them, plus they're cheaper than buying new PR's.
04-15-2013
It would be best to get the correct push rods for the application (height)... IMO
04-15-2013
To keep proper valvetrain geometry, you need to shim the rockers. That is the correct way to do it.
04-15-2013
Ok cool, thanks guys. Anyone here running YT rockers with them, or is it not possible? I have 1.8's that I would have liked to install them with, but I don't know if I can run them with the PR's they come with as I'm also running an NIC. I'm in the process of emailing with zoomer, and he says I'll need stronger PR's and he says the 5/16th's rocker bolts are too weak. Is that the case with ARP bolts?
04-15-2013
150 springs = upgrade rocker studs.
YT's are the worst on rocker bolts, stock would be better. You are going to have to measure for custom pushrods AFTER you get the shims in (the shims fix the valve issue, not the pushrod issue).
04-15-2013
ZZP heads are really starting to be more trouble then they're worth. I don't really want to deal with the downtime of putting everything together only to wait on pushrods in the mail. Is there a "rule of thumb" in terms of what size PR's people use with stage 4 heads and an XP/NIC?
04-15-2013
technically with stock rockers they need to be longer the same height as the shim. YT's have different pushrod requirements, and they suck.Originally Posted by Wotgtp
130s with stock rockers and shims would probably be the best deal... trade the YT's in for more power and money for new pushrods.
04-15-2013
You think I'll be reasonably safe to use stock PR's until the new ones come in the mail? Or am I going to sling metal in my oil galleys?
EDit- like for a day or two with low rpm operation.
04-15-2013
Or have no intake or exhaust valve openings? Lol
04-16-2013
Problem here is each motor is a bit different and measuring is the proper method.
I see a way around this, order a couple different pushrod lengths and return what you don't need. I'm pretty sure I have a longer set of Intense rods laying around. You can have them if you need them.
04-16-2013
Like he said!
Get the proper PR length... It eliminates chance!
Just sayin!
Last edited by coolone; 04-16-2013 at 06:50 AM.
04-16-2013
no. Just do it right the first time.
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