wish me luck. heads and cam swap #3

[Bo White]

All out build bud. All out. Minus fancy stuff like flycutting and milling. All of my build will be off the shelf parts straight out of the box. Anyone can be able to duplicate it easily.

[xc_SS/RS]

damn that old cam was caught on time. so are you going from stock intake manifold straight to super vic? going to try a rod-mod in between?

[Bo White]

No

[christianchevell]

Just from this oldster farts experience Bo I would say that IMO appears to be more of a tracking wear than a both sides of the lobe not micro polished or broken in well as its only one lobe on one side and would suspect a trunnion getting bad on one side making the slop hit a little harder on one side of the roller when the lifters going down and I would stare like a bugger at the valve tip to see swipe pattern...But thats just me...... Your going with new heads and new trunnions being bushed so looking at the past is...... but you new baskets etc etc will help yet I am a spaz and I used a 8620 core from cam motion and I of Course religiously use BR30 driven racing break in oil....

In the better safe than sorry club..... Good Luck you look like you have the parts....and just got some luck as further down the road even with rollers with our pressures sure as hell that lobe would delaminate and go south and take..........well you know. I do know Cammotion makes others stuff like the Ticks and such so you should talk to Kip though hes not on here like he used to be.... you could call I mean they are just down south where good stuff comes from...good luck, I know the first around was them with 8620 on here for cores and I have been here like forever. Oh and my first cam the 235/239 cam was TSP and came with a regular old comp cam core and broken in with br30 its was prestine at over 10k and sold off by me when I went new engine... Great Luck any way.....

[Bo White]

3 lobes. Trunions were all in 1 piece when I pressed them out. No break in on roller cam. My previous cam was in awesome shape when I sold it. It was an older Comp grind for Lingenfelter.

[zz430camaro]

Originally Posted by Bo White

3 lobes. Trunions were all in 1 piece when I pressed them out. No break in on roller cam. My previous cam was in awesome shape when I sold it. It was an older Comp grind for Lingenfelter.

Hmmm, that old cam was running lower lift and lower spring load.

[zz430camaro]

Between the failures of Comp's trunnion kits and cams I would never use them and I'm sure they would argue it was not their stuff. I am getting a cam done by Bullet Racing Cams recommended by Brett and Land Speed Heads. I am glad I returned my BTR cam I bought and hope the Bullet is a good one.

[Bo White]

Originally Posted by zz430camaro

Hmmm, that old cam was running lower lift and lower spring load.

It would be easier on the cam for sure. I believe that cam was originally ground before they started having issues. Its old grind that Lingenfelter doesnt sell often.

[sinisterlsx510]

Originally Posted by Bo White

When I pulled my cam I didnt look at it really. Wiped it down today and seen its on its way out. Glad Im redoing my build even more now. Rollers still look good that was on those lobes though. Weird.

lol almost kinda looks like my cam from the previous motor i had.. it was a tsp comp core..

[zz430camaro]

Originally Posted by Bo White

It would be easier on the cam for sure. I believe that cam was originally ground before they started having issues. Its old grind that Lingenfelter doesnt sell often.

I wonder if they are using cam cores from China?

[christianchevell]

Blanks most likely are from china for a lot of cams....three lobes that's wondering about pressures and well you can say a roller does not need a break in ask what NASCAR does....they break them in....

[go_go_gadget88]

Originally Posted by christianchevell

a roller does not need a break in ask what NASCAR does....they break them in....

I'm quite certain there is a large difference between doing some ~10 second street and dyno pulls at (usually) <7,000rpm, compared to hundreds of miles of all out, pedal-to-the-metal kind of driving with huge lift camshafts at almost 10,000rpm, with thousands and thousands of dollars on the line.

If everyone did everything exactly like NASCAR does...virtually none of us could afford the hobby.

[Punisher_ATX]

The Issue is comp grinds their cams too fast and it burns out the heat treatment and weakens the material. So the result is the cam lobe peels away. I have a few here that the lobe came off completely. TSP switched to Callies cores that are made in the USA and cut on a Landis CNC cam grinder to ensure that the heat treatment does not get damaged. Also Roller cams do not need break in to clarify...

[frankwjr]

while a roller cam does not need "break in" every other component in the build does..every contact point, bearing surface, springs(they should be run up to temp/cooled 3x before hammering but that's me),etc. needs to take a "set"...the more work done to the motor the more parts need to get happily married for hopefully a long life...and while we run syn oil I do/will run some good dino on first run in that will last long enough the get the oil temp up close to norm...then an immediate drain/refill with syn incl filter change...why? dino is not as "slick" as syn and IMHO allows the parts to set quicker(I know it's syn from factory but) and more important is to cut open the oil filter and check for any "unusual" crap...don't matter how well we clean there will ALWAY'S be little itty bitty pieces of sh!t that hideout until first run in...church!)

heck when I did the trunnion/spring/P/R upgrade on my car I left the oil in(it was close to a change) did the work and initial startup with the old oil basically following the above and then did a change...oil and filters are cheap compared to engine rebuilding..