Newer style Jesel rocker arms.
#632259
03/06/10 05:04 PM
03/06/10 05:04 PM
|
Joined: Dec 2008
Posts: 1,200
UK
602heavy
OP
pro stock
|
OP
pro stock
Joined: Dec 2008
Posts: 1,200
UK
|
Replaced the jesel rocker arms as some of them snapped @ the adjuster area (3 exhaust) , removed valve covers to reconfigure the baffle plates & found all rocker arms hitting side of valve covers , seems these newer rocker arms have the adjuster area beefed up which is where they hit the valve covers , had to clearance the sides of valve covers for clearance , these cast indy valve covers are pretty thin so had to go carerful , broke through on the last one.  Anyone had this issue? TIA.
|
|
|
Re: Newer style Jesel rocker arms.
[Re: 602heavy]
#632260
03/06/10 06:21 PM
03/06/10 06:21 PM
|
Joined: Feb 2004
Posts: 3,441
Mo.
supercomp
master
|
master
Joined: Feb 2004
Posts: 3,441
Mo.
|
Quote:
Replaced the jesel rocker arms as some of them snapped @ the adjuster area (3 exhaust) , removed valve covers to reconfigure the baffle plates & found all rocker arms hitting side of valve covers , seems these newer rocker arms have the adjuster area beefed up which is where they hit the valve covers , had to clearance the sides of valve covers for clearance , these cast indy valve covers are pretty thin so had to go carerful , broke through on the last one.
Anyone had this issue?
TIA.
We had to use sheet metal on our B1s.
|
|
|
Re: Newer style Jesel rocker arms.
[Re: 602heavy]
#632262
03/06/10 08:17 PM
03/06/10 08:17 PM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quote:
Supercomp , those Jesels on you're engine are the same as the one's in had on my 572-13 heads , the new one's on there now have the adjuster area beefed up , you're one'es are flat across the area where the adjuster screws in , the newer type rocker arms have more material in this area which puts them closer to the side of valve cover , i would say a good 1/4" closer.
Do they make a reverse lip cover for the BB, I have
to use the reverse lp cover on my SB and I had to
notch the lip and gasket for push rod clearance
|
|
|
Re: Newer style Jesel rocker arms.
[Re: 602heavy]
#632263
03/06/10 08:26 PM
03/06/10 08:26 PM
|
Joined: Jan 2003
Posts: 2,926
A shed in England
Tig
master
|
master
Joined: Jan 2003
Posts: 2,926
A shed in England
|
Yep. We had the same problem, clearenced and OK. Problem will be more with 1.5 arms compared to 1.6.
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
|
|
|
Re: Newer style Jesel rocker arms.
[Re: Tig]
#632265
03/06/10 08:31 PM
03/06/10 08:31 PM
|
Joined: Dec 2008
Posts: 1,200
UK
602heavy
OP
pro stock
|
OP
pro stock
Joined: Dec 2008
Posts: 1,200
UK
|
Quote:
Yep. We had the same problem, clearenced and OK. Problem will be more with 1.5 arms compared to 1.6.
Tig , i take it you've got the newer type rocker arms? , did you cut the coveres as i've had too?
PITA.
|
|
|
Re: Newer style Jesel rocker arms.
[Re: 602heavy]
#632266
03/06/10 08:42 PM
03/06/10 08:42 PM
|
Joined: Jan 2003
Posts: 2,926
A shed in England
Tig
master
|
master
Joined: Jan 2003
Posts: 2,926
A shed in England
|
We've had 3 types of 1.6 rocker arm. (one type wouldn't fit the notched rail though) The early type, (non tumbled) just caught the covers, this was back in '99 so we clearenced them then. 1.5 arms are longer so the problems gotta be worse. We might be changing to 1.7 arms next season, cant see a problem with these and 572 heads really respond to that particular ratio.....apparently.
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
|
|
|
Re: Newer style Jesel rocker arms.
[Re: Tig]
#632267
03/06/10 09:19 PM
03/06/10 09:19 PM
|
Joined: Mar 2009
Posts: 1,169
Virginia Beach, VA
Old School
super stock
|
super stock
Joined: Mar 2009
Posts: 1,169
Virginia Beach, VA
|
Quote:
We've had 3 types of 1.6 rocker arm. (one type wouldn't fit the notched rail though) The early type, (non tumbled) just caught the covers, this was back in '99 so we clearenced them then. 1.5 arms are longer so the problems gotta be worse. We might be changing to 1.7 arms next season, cant see a problem with these and 572 heads really respond to that particular ratio.....apparently.
my 572-13,s really woke up when i went from 1.55 to 1.7,s. 3/4 point more compression and the rocker ratio switch was worth about 40-50 hp on my 580" motor. 
68 cuda formula S 588" bb 5sp
70 CUDA CONVERT 500" 5SP (SUBLIME)
70 CUDA CONVERT 500" 5SP (PLUMCRAZY):TOO MUCH HORSEPOWER, IS ALMOST ENOUGH!
|
|
|
Re: Newer style Jesel rocker arms.
[Re: Old School]
#632268
03/06/10 09:37 PM
03/06/10 09:37 PM
|
Joined: Jan 2003
Posts: 2,926
A shed in England
Tig
master
|
master
Joined: Jan 2003
Posts: 2,926
A shed in England
|
Quote:
my 572-13,s really woke up when i went from 1.55 to 1.7,s. 3/4 point more compression and the rocker ratio switch was worth about 40-50 hp on my 580" motor.
I've heard this more than a few times now, so I'm inclined to believe this to be the case. However, IMHO I'd assume that the rise in compression contributed to the majority of the 50hp rise rather than the ratio change. I'd put the arms at 20hp, max, again going from what I've heard. Still worth it though in my book 
Sorry to Hijack the thread here Adam 
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
|
|
|
Re: Newer style Jesel rocker arms.
[Re: 602heavy]
#632270
03/06/10 10:02 PM
03/06/10 10:02 PM
|
Joined: Jan 2003
Posts: 2,926
A shed in England
Tig
master
|
master
Joined: Jan 2003
Posts: 2,926
A shed in England
|
TBH I would have considered 11.5:1 cr, piston is same price regardless. You can get away with it, though it depends on intake closing timing (in our case 92 deg's ABDC). Sorry to ramble on, I've had about 8 pints and a few Vodka's tonight  Nostrovia 
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
|
|
|
Re: Newer style Jesel rocker arms.
[Re: 602heavy]
#632272
03/06/10 10:08 PM
03/06/10 10:08 PM
|
Joined: Jan 2003
Posts: 2,926
A shed in England
Tig
master
|
master
Joined: Jan 2003
Posts: 2,926
A shed in England
|
Ahhh...my mistake old bean.
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
|
|
|
|
|
