Some photos, updates & valve spring question...
Thread Starter
Drifting
Joined: May 2003
Posts: 1,979
Likes: 48
From: Lakeport CA
Some photos, updates & valve spring question...
hi all, first a couple of photos on the stock Xbrace install on my coupe. I made these plates from 1/8 in plate & welded into the rear area. Next step will be to weld on some 1/4 thick by 1 inch strap for drill/tap of holes for the rear mounts.
Now for the valve spring question. Just got my heads back from the shop. The stock springs were pretty weak, under 60 lbs seat pressure at installed height. The service manual only calls for a 76-84 lbs but the Isky springs the shop put on are running about 120lbs closed. Is that too much for the roller cam system... as in it could cause premature failure of a roller lifter or cam lobe? Here is a pic of my heads ready to go.
:confused:
[Modified by Trog, 6:20 PM 9/9/2003]
Now for the valve spring question. Just got my heads back from the shop. The stock springs were pretty weak, under 60 lbs seat pressure at installed height. The service manual only calls for a 76-84 lbs but the Isky springs the shop put on are running about 120lbs closed. Is that too much for the roller cam system... as in it could cause premature failure of a roller lifter or cam lobe? Here is a pic of my heads ready to go.
:confused:
[Modified by Trog, 6:20 PM 9/9/2003]
Thread Starter
Drifting
Joined: May 2003
Posts: 1,979
Likes: 48
From: Lakeport CA
Re: Some photos, updates & valve spring question... (Trog)
Thanks for the feedback on the springs... I hate worring about that kind of sh...
Now if I could just figure out why my pic links won't work again!!! :banghead:
Is there something I'm missing?!? Same directory where my other photos are saved, checked spelling & explicit case of letters made the diff last time but no go this time...
[Modified by Trog, 11:11 PM 9/8/2003]
Now if I could just figure out why my pic links won't work again!!! :banghead:
Is there something I'm missing?!? Same directory where my other photos are saved, checked spelling & explicit case of letters made the diff last time but no go this time...
[Modified by Trog, 11:11 PM 9/8/2003]
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Some photos, updates & valve spring question... (Trog)
Right click on any pic in this thread and then left click on Properties to see where a typical pic is stored, i.e. it is stored on a web site.
Once you have the pic on the web, during a post here, left click on Image below the Reply window and paste the web location of your pic between the two <img src=" " border=0> braces.
Once you have the pic on the web, during a post here, left click on Image below the Reply window and paste the web location of your pic between the two <img src=" " border=0> braces.
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Re: Some photos, updates & valve spring question... (Trog)
You say roller cam, do you mean solid roller or hydraulic roller.
A solid roller cam can take a lot more spring pressure than a hydraulic can. You enter into trouble when the spring pressure collapses a hydraulic lifter. In either case you're just fine. My springs were set up for something like 140 and who knows what open pressure (I'm sure it's unreal) and it's been doing just fine as my daily driver.
The higher the spring pressure the less likely you are to have valve float which means higher RPM potential. That's ONE reason a solid roller cam can rev higher than a hydraulic. :cheers:
A solid roller cam can take a lot more spring pressure than a hydraulic can. You enter into trouble when the spring pressure collapses a hydraulic lifter. In either case you're just fine. My springs were set up for something like 140 and who knows what open pressure (I'm sure it's unreal) and it's been doing just fine as my daily driver.
The higher the spring pressure the less likely you are to have valve float which means higher RPM potential. That's ONE reason a solid roller cam can rev higher than a hydraulic. :cheers: