Previous Thread
Next Thread
Print Thread
Page 2 of 2 1 2
Re: Push rod hitting cylinder head [Re: '72CudaRacer] #3074420
09/05/22 10:12 AM
09/05/22 10:12 AM
Joined: Jan 2003
Posts: 14,479
So. Burlington, Vt.
F
fast68plymouth Offline
I Live Here
fast68plymouth  Offline
I Live Here
F

Joined: Jan 2003
Posts: 14,479
So. Burlington, Vt.
For the second go around, I removed quite a bit of material from the intake side of the slot. More than what I would have done previously for 1.5 rockers(with heads that had the slots like they used to be).
I think the PR’s would now clear with 1.5’s...... and we’re using 1.6’s.
But I wanted to make sure I wouldn’t have to do it again.

My work around for the rocker pairs being “too wide” for the heads is to machine down the spacers that go between the two rockers.
I’m surprised at how few rocker sets/heads don’t need attention in this area.

I’ve done it to probably over a dozen sets of Mancini rockers/Ede BB Heads.
It’s amazing to me that basic combo of parts isn’t a simple bolt on.
But all the ones I’ve had here, if you just bolt it all down, the rockers are all jammed up.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Push rod hitting cylinder head [Re: fast68plymouth] #3074460
09/05/22 12:18 PM
09/05/22 12:18 PM
Joined: Sep 2003
Posts: 19,239
north of coder
moparx Offline
"Butt Crack Bob"
moparx  Offline
"Butt Crack Bob"

Joined: Sep 2003
Posts: 19,239
north of coder
i remember reading somewhere, the term "simple bolt on", meant you needed to re-engineer the part. laugh2
beer

Re: Push rod hitting cylinder head [Re: moparx] #3074481
09/05/22 01:20 PM
09/05/22 01:20 PM
Joined: Jan 2003
Posts: 14,479
So. Burlington, Vt.
F
fast68plymouth Offline
I Live Here
fast68plymouth  Offline
I Live Here
F

Joined: Jan 2003
Posts: 14,479
So. Burlington, Vt.
I installed Crane Gold 1.5’s on quite a few engines without having to modify anything.

Those were the most user friendly rockers I can recall using...... from a fitment standpoint anyway.

I don’t recall any real fitment issues with their ductile iron 1.5’s either.

I think any other rockers I’ve used have required something needing to be tweaked for them to fit.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Push rod hitting cylinder head [Re: moparx] #3074482
09/05/22 01:27 PM
09/05/22 01:27 PM
Joined: Dec 2021
Posts: 1,072
Loudoun County, VA
Brad_Haak Offline
super stock
Brad_Haak  Offline
super stock

Joined: Dec 2021
Posts: 1,072
Loudoun County, VA
Originally Posted by moparx
i remember reading somewhere, the term "simple bolt on", meant you needed to re-engineer the part. laugh2
beer

Certainly been my unexpected experience with a number of parts combinations... realcrazy


2021 Challenger 6.4L Scat Pack 1320 (2022)
100% stock: 1.680, 11.894 at 113.75 (DA 175 ft)
wheels, tires, air filter: 1.714, 11.833 at 115.80 (DA 310 ft)

1973 Challenger 452 ci street/strip (2008)
pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
Re: Push rod hitting cylinder head [Re: '72CudaRacer] #3078172
09/17/22 06:16 PM
09/17/22 06:16 PM
Joined: Jan 2003
Posts: 14,479
So. Burlington, Vt.
F
fast68plymouth Offline
I Live Here
fast68plymouth  Offline
I Live Here
F

Joined: Jan 2003
Posts: 14,479
So. Burlington, Vt.
I see you’re up and running.

What was your final solution on getting the rockers/pushrods situation sorted out?


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Push rod hitting cylinder head [Re: fast68plymouth] #3078341
09/18/22 10:54 AM
09/18/22 10:54 AM
Joined: Aug 2009
Posts: 2,036
Mooresburg, Tn
'
'72CudaRacer Offline OP
top fuel
'72CudaRacer  Offline OP
top fuel
'

Joined: Aug 2009
Posts: 2,036
Mooresburg, Tn
Originally Posted by fast68plymouth
I see you’re up and running.

What was your final solution on getting the rockers/pushrods situation sorted out?


A LOT of grinding! I purchased a set of Harland Sharp 1.5 rockers, but they will need longer push rods and lash caps to get the geometry as good as the Hughes rockers, so I used the Hughes rockers for now.
As far as the fitment goes, Indy can eliminate a lot of this problem during the machining process to begin with. I will see Chris & Charli in a few weeks at the Mopar show in London, Ky, and offer this suggestion to them.


Thanks for your input (VERY valuable!),
Brian

Re: Push rod hitting cylinder head [Re: '72CudaRacer] #3078343
09/18/22 10:58 AM
09/18/22 10:58 AM
Joined: Jan 2003
Posts: 14,479
So. Burlington, Vt.
F
fast68plymouth Offline
I Live Here
fast68plymouth  Offline
I Live Here
F

Joined: Jan 2003
Posts: 14,479
So. Burlington, Vt.
You’re right, the machining operation for the pushrod tunnels could easily be altered to make it where no messaging was required.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Page 2 of 2 1 2






Powered by UBB.threads™ PHP Forum Software 7.7.1