I ran two seperate lengths. pretty close to stock.

this is 10 turns stock length


this is 11 turns 7.3


which one looks better or should i still look for a more thin line? 7.3 pretty much centered it right up should i go longer a little bit and see if it gets thinner? thanks guys

 

You have an adjustable pushrod checker? based off the 7.2 and the 7.3 Id go 7.250

 

Did you actually turn the motor over or just twist the rocker to make the pattern? If you turned the motor over are you sure that you did not compress the lifter at all?

 

That bottom picture looks good.
Don't know how many of these you actually build, but I don't see why you think longer is needed.

 

What checking tool are you using. The ones that I've seen adjust at a rate of .050 per turn not .100 like you have mentioned. Ie if 10 turns is 7.2 then 11 turns would be 7.250

 

oops thats my fault it was 12..

lifter is solid as well i took it apart and washered it up.

i havent done many and i didnt know if that line looked too thick. it centered nicely though i thought

 

The rocker tip makes a sweeping motion across the valve tip which is why the pattern is as wide as it is.

 

You can buy dial calipers long enough to measure pushrods at Harbour Freight. Would not measure bearings with it, but I feel like it's good enough for pushrods. I don't trust counting turns. First, the checking pushrods I have had are never exactly the length that say, so you could order the wrong length.

Don't be surprised to find your new custom pushrods to vary .015" or more, one to the next. LOL

 

what pushrods would i order? what do you guys prefer? lloyd cam 231/239, comp 1.6 nsas with guideplates on afr 180s

7.250 length looks to be good that way they can be off .015" ha

 

http://www.summitracing.com/parts/tf...7250/overview/

these good? about $10 cheaper than the comps

 

Either the Trickflow's or Comp's work from everything I've read, easily the 2 most popular. Although someone with more experience may chime in here. I'll be doing this next year with my AI H/C combo.

 

I meant some 6 to 8 longer, some 6 to 8 short.

 

The pushrod end of the rocker doesn't move down in a 1:1 ratio with the center of the rocker when you add pre-load.

 

I believe I used manton pushorods. I think they have a good rep.

 

wow. i just ran into a problem and im checking my thread for my measurements. i cant believe i did this. 6.8-7.8 pushrod length tool. 10 turns is not 7.2 how the hell did i add that wrong. i measured like 3 times and then did simple math wrong. brilliant

 

Like stated, you can get a digital caliper from Harbor Freight that is close enough accuracy to measure most pushrods for like $20 bucks. No guessing and estimating number of turns on a PR checker

 

^^^

use a stock 7.200 to get a base pattern mark on valve tip. Then use a caliper to set the adjustable PR check tool .250" +/- more or less depending which way you need to go. "Generally" with decked heads & block you need slightly shorter. Many aftermarket PR come in lengths with incriments of .250 in length

If the pattern is closer to intake, get longer PR. if towards exhaust side of head, get shorter. Yeah you can order custom PR at any length say a 7.087 as example....but the diff between that and a 7.100" is nothing...unless you are building a $50k NASCAR motor so just order a 7.100 off the shelf.

More important, IMHO, is get a thicker .080 wall PR to reduce PR flex. Hardened PR are required if using guideplates for NSA RR

 

Come on guys this aint rocket science. For a street motor i believe here? Those marks look great as u just want to keep the rocker off/away from the edge where it can cause side loading.

I hate those adj p-rods. I have one and tried to use it once and realized thats for a an engine on the stand, not one in the car. Just bought both a Manley and ProForm p-rod checker for like 10 bucks and found my p-rod length in seconds - not hours.

http://www.summitracing.com/parts/pr...FRGCfgodsVkAgQ

And like Ed said my new p-rods from Trick Flow came like 0.005" different than the number etched on the p-rod but still worked great.

Let the NASCAR kids play with the adj p-rod checker,
cardo0

 

Is that really all there is to it?

 

Do u have another reason or do u just want to hear me repeat myself? Can u provide another reason?? Ill even listen.

cardo