If your mains are .0028 the 15w-50 will work even better than what you have now and go full synthetic, JMO. I run .0025 on mains/rods on my LS2 and it's perfect together and i daily the **** out of mine w/ 4.10's. What brand springs are on their now? PAC just got bought out by same corp that bought AFR and Scat. At some point we will all by buying the same **** w/ different labels. I would look at Isky springs, they have the longest/best rep of any spring i the business.

 

ive been using pac 1209x. Will be changing them to nextek this go around. Ill try running a thicker oil also

 

Im going to perservere with running the solid roller, Engines coming out and going off to have lifter bores machined to accept either .905/.820roller jessel tie bar lifter or .937/.850roller jessel keyway lifter. The plus for keyway is i wont have to take head off to get to lifter Will decide after advice from Tony. The keyway lifter is 45g lighter per lifter so just asking how important weight saving is on lifter side.
Think while engine is getting machined ill send my heads to tony to get upgraded to v2

 

Decision made
Heads are being sent to mamo next week for upgrade, titanium valves, etc.
Tony will also spec a cam for me
Engine block will go to machine shop once i have the bushing to have jesel keyway lifter bore bushing installed for a .937 dia .850roller dia .500roller length 102g jesel keyway lifter.
Thats a 25g per lifter weight saving over the crower i had
Itll be a few months getting the heads to the usa for tony to do his stuff and get back here to australia. Im just gunna drive it then till i bust something, only thing ill do is check lash and put new oil in it when needed. ill also buy a spring pressure tester to keep and eye on tht....
See how long it lasts

 

Nice Mickey! The .937 lifters will be a substantial upgrade. Any ideas on next camshaft?

 

Tony hasnt said anything as yet, all ive said is im happy with how the 255/269 drove so if he wanted to go bigger tht be ok, within reason
With the titanium valves and the extra head work , new cam id expect we could pick up the 13rwhp to get me over 700rwhp
Heres hoping

 

Im still flippin n floopin on whether to go the jesel keyway lifters or the jesel pro tie bar lifters

The main difference is weight. Its about 40g each lifter heavier for the tie bar
They both will b .937 body. .850 dia wheel
with thr needle besring in the keyeay .500 to the tie bar .450
Thr pro’s for keyway lifters are weight, slightly wider wheel , i dont hv to take heads off to remove lifters
The pro”s for the tie bar is $1500 less costs
you have the tiebars to grab if u hv damaged the lifter when removing

What would you do???????

 

Weight on that side isn't as crucial. It's what I run and turn 8000 regularly.

tie bar

 

I can get take out Jesel .937 keyway coated lifters with one race on them for $250. They are in excellant shape. NASCAR shops have them in bulk. Plus if something does go south with them, or your simply not sure about them, Jesel will rebuild them.

 

Im stripping the engine down so i can drop it to machine shop tomorrow and have keyway lifter bushing installed.
was very happy with how the pistons look after 40,000miles.

Very minimal wear on skirts

 

Big day today, im picking up the jesel lifters , Tony has specced a cam , just going a little more duration 258/272 and upping the lift a tad .717/.713.
Machine shop has bushed the lifter bores so ill get the lifters to him today so he can finish lifter bores to suit the lifters, he gave the cylinder bores a light hone also.

 

Few pics of the new lifters Jesel sayds with priority mains i may need oil restrictors. Why didnt my last lifters.crower, not ask the same , and wht will oil restrictors achieve?????

 

Did you go with a .937 lifter with a .850 wheel this time? What was it before OEM .842 and .700 wheel?

 

Yep, .937 and .850 wheel and before was oem . In the pic above the oem fits inside the .937

 

Ill finally get my block from machine shop next week but now im shipping my heads to Mamo to get the V2 port job and titanium valves. Will put the short block together next week ill go ..0020 top, .0022 2nd and .0015 oil for ring gap , mains ,0024 and rods ..0019 was thinking whether i need to get a new oil pump and cam chain, my thinking is if its not broke no need to replace.The chain is looking good, didnt have any slack and the oil pump has been on for 4 yrs.. Should i replace both???

 

The larger wheel will gain you some effective duration also

 

ive been trying to get myhead around that.
Can you explain why?

 

I believe it’s like a push mower with larger rear wheels vs. one with small rear wheel. Instead of easier to push, being a larger wheel, that effects duration.

 

It's hard to explain. A larger roller "sees" the cam lobe a bit earlier, being the curve of the roller surface is a bit flatter.

 

I understand what they are saying but I'm not sure it has any practical meaning in this case.

Imagine a mark on the floor 1 foot away from a wall. Place a ball centered on that mark, and then roll the ball until is touches the wall. How far did the ball travel? Less than 1 foot by whatever is the radius of the ball. A larger ball will travel less distance (cam duration around the circle) than a smaller ball before climbing (lift) up the wall.

Now start to lay down that wall in your mind's eye so the lift rate is less aggressive. As the wall is laid down, it makes first contact with the ball further and further to the underside of the ball, gradually creeping closer to the actual centerline of the ball. The larger ball is still traveling less distance than the smaller ball before first contact with the wall (where lift occurs), but the difference is shrinking as the wall is laid down (less lift rate). Eventually both ***** will lift at near the same point (the ball centerline) when the lift rate is gentle enough, or the radius of the ***** are similar enough.

So yeah, in theory a larger diameter roller can reduce duration at valve lift, and increase duration at valve close. But the cam ramp rates smooth those inflection points, and the rollers are maybe similar enough in diameter that this is just noise in the data for all practical purposes. I don't know, I'm not a cam guy, maybe it's significant and maybe it's not...