Jessel shaft mounted roller rockers...
Thread Starter
Drifting
Joined: Aug 2001
Posts: 1,606
Likes: 14
From: Vacaville, CA
Jessel shaft mounted roller rockers...
Are the Jessel shafts really that much better that the Hi-tech Comp-Cams rollers. I'm almost positive that I'm going to use a hydraulic roller cam; (around 226/238 @ 50) in my 434 dart motor, hence lower valve spring pressure = max of 6,500 RPM. So with this set-up are the Jessel shafts just a waste of money? And if so, are the Jessel standard rollers better quality than the Comp-Cams or the Crower stainless-steel rollers?
Drifting
Joined: Jul 2001
Posts: 1,418
Likes: 1
Re: Jessel shaft mounted roller rockers... (BlackRocket)
I think it would be overkill or a waste with your springs/cam.Doubt if Jesel makes those rockers concerning your other question.
The Crane gold lifters are the best I have seen in a aluminum bodied rocker and will easily get the job done for you..Crower for the other .Actually Norris made a good steel roller rocker but I don't know if they are in business any longer
[Modified by mountainmotor, 4:59 AM 2/6/2002]
The Crane gold lifters are the best I have seen in a aluminum bodied rocker and will easily get the job done for you..Crower for the other .Actually Norris made a good steel roller rocker but I don't know if they are in business any longer
[Modified by mountainmotor, 4:59 AM 2/6/2002]
Racer
Joined: Sep 2001
Posts: 354
Likes: 0
From: Prineville Oregon
Re: Jessel shaft mounted roller rockers... (BlackRocket)
Ditto to what Mountain motor said...shaft mounted rockers are for ultra high RPM"S...don't waste your money. Your cam is awfull small for 434 cubic inch. I ran 234 in. 244 ex. @ .050" in my 357 (.040 over 350 c.i.) and it was still very streetable and made enough vacuum to operate the power brakes, etc. Deen
Le Mans Master
Joined: Feb 1999
Posts: 5,877
Likes: 1
From: Park Ridge IL
Re: Jessel shaft mounted roller rockers... (BlackRocket)
Like everyone else said, the shaft mounted rockers are superior to stud mounted rockers if you need them or your head requires them, but with such a small cam and only 6500 rpm you don't need them. If you want to add some rigidity to the valvetrain, add a stud girdle.
I'm running the Jesel Y2K shaft rockers and they are very nice pieces, at $1400 they are pretty expensive, but 18* heads require them. I'd go with the Crower stainless steel rockers if I were you - they'll last forever and due to their design, are almost as light at the valve as an aluminum rocker - and that's really all that counts.
I also agree that a 226/238 cam is too small for a 434. I tested 4 cams on the dyno on my SBC 427 and the smallest one was 242/256. The largest was 256/264 and it made more power and torque at every rpm point than the smallest cam did. I would be usrprised if a 226/238 cam would let a 434 even rev to 6500 rpm - I'm sure it would, but you would have passed the hp peak 1000 rpm or more earlier.
I'm running the Jesel Y2K shaft rockers and they are very nice pieces, at $1400 they are pretty expensive, but 18* heads require them. I'd go with the Crower stainless steel rockers if I were you - they'll last forever and due to their design, are almost as light at the valve as an aluminum rocker - and that's really all that counts.
I also agree that a 226/238 cam is too small for a 434. I tested 4 cams on the dyno on my SBC 427 and the smallest one was 242/256. The largest was 256/264 and it made more power and torque at every rpm point than the smallest cam did. I would be usrprised if a 226/238 cam would let a 434 even rev to 6500 rpm - I'm sure it would, but you would have passed the hp peak 1000 rpm or more earlier.
Safety Car
Joined: Mar 2001
Posts: 4,847
Likes: 0
From: Tampa FL
Re: Jessel shaft mounted roller rockers... (BlackRocket)
The Jessels are the best in the business. We actually went with the T&D's, which I think are just a tad better because they are a little easier to adjust, but both companies have superior systems. The big win on these types is the clearance. Although we ended up having to hack our valve covers to clear the booster & AC unit, the T&D's will fit under any stock valve cover height & will not move once set. They are expensive, but I think worth the cost in a situation like mine where we have to yank the blowers to adjust valves...
Safety Car
Joined: Dec 1999
Posts: 4,148
Likes: 5
From: Roxbury NJ
Re: Jessel shaft mounted roller rockers... (Merlin522)
in a situation like mine where we have to yank the blowers to adjust valves...
-Joe
[Modified by Flareside, 7:54 AM 2/9/2002]
Drifting
Joined: Feb 1999
Posts: 1,769
Likes: 33
From: Bradenton Florida
Re: Jessel shaft mounted roller rockers... (Flareside)
Jesel seems to be advertising thier new SS models for a affordable cost of 695.00 complete. Not shure if these include Lt1 heads but it does seem to inlcude most 23 degree early style heads.
I am debating this issue as well. I do run a comp extreme solid roller. 248/248. So in my case this would be a wise choice. I will decide after the final bill of my head porting.
Dennis
I am debating this issue as well. I do run a comp extreme solid roller. 248/248. So in my case this would be a wise choice. I will decide after the final bill of my head porting.
Dennis
Safety Car
Joined: Dec 1999
Posts: 4,148
Likes: 5
From: Roxbury NJ
Re: Jessel shaft mounted roller rockers... (BOWTYE8)
Jesel seems to be advertising thier new SS models for a affordable cost of 695.00 complete. Not shure if these include Lt1 heads but it does seem to inlcude most 23 degree early style heads.
I am debating this issue as well. I do run a comp extreme solid roller. 248/248. So in my case this would be a wise choice. I will decide after the final bill of my head porting.
Dennis
I am debating this issue as well. I do run a comp extreme solid roller. 248/248. So in my case this would be a wise choice. I will decide after the final bill of my head porting.
Dennis
-Joe
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Drifting
Joined: Feb 1999
Posts: 1,769
Likes: 33
From: Bradenton Florida
Re: Jessel shaft mounted roller rockers... (Flareside)
Joe,
Best todo is give them a call. I will try contacting about early march. If you get them earlier post what info you recieve from them.
Thanks
Dennis
Safety Car
Joined: Dec 1999
Posts: 4,148
Likes: 5
From: Roxbury NJ
Re: Jessel shaft mounted roller rockers... (BOWTYE8)
Thanks Dennis. I got the latest issue of CHP in the mail today, and it contained an ad for the new SS rockers. I'll have to call Jesel to see if they will fit on my BB AFR heads, since the valves aren't in the stock location.
-Joe
-Joe
