JL ws-6

iTrader: (50)

That's 100% true statements made above here. NO WAY IN HELL are those springs enough..

You need, even with a smallish solid roller over 300/600 for pressure...

Springs on the 408 I have sitting here (for sale too) are 450 open 840 at coil bind, Cam is a 262/267 740 lift, for referance.

Wicked94Z

iTrader: (26)

those springs sound EXCESSIVELY heavy, like WAY too much. I don't see why you'd need anymore than about 260 on the seat, spring rate in the ~560 range. A 408 with that size cam isn't revving too high

JL ws-6

iTrader: (50)

Cam has about 40 degrees of overlap... I plan on spinning it to 8500

quik95lt1

iTrader: (7)

same here i got the jesels with a good valvetrain and i never have to adjust them......drives fine i say go for it!!

Firehawk441

iTrader: (41)

It's no different then a hydraulic if you know how to adjust them and lock them down properly.
These shaft systems today have no problems staying in check.

Back in the 50's, 60's, and early 70's when the OEM cars had solid lifters they only used the basic "locking nuts" (which were nothing more then an out of round threaded nut) and stamped steel rockers that would continuously creep out of adjustment. Trust me on this, I work on these cars (53-present date Corvettes)Monday through Friday.

robsquikz28

iTrader: (246)

what brand shaft systems are a good bang for the buck?

JL ws-6

iTrader: (50)

T&D makes a pretty good setup for a good bit less then Jesel gets, and they're a good bit cheaper then what I paid for the Crower ones.

Firehawk441

iTrader: (41)

I only have experience with T&D/Comp and Jesel shaft systems in LS engines. If you plan on running a solid roller setup, stay FAR, FAR away from T&D's. The geometry is the worst I've ever seen...

Jesels carry a high price tag for a reason. They always work.

If you use a hydraulic, the T&D / Comp system is OK.

stangeater01

iTrader: (125)

no you dont see it in the same sentence lol one is in my sig. i have two cars one with a 427lsx and a 106mm this is my dd car with a 85mm turbo with A/c pwr steering ect.. hopfully 9.0's

Shawn @ VA Speed

iTrader: (3)

this really isn't an accurate statement. I've used both T&D's and Jesel's. On certain heads the T&D's have better geometry and on others the Jesel's are better.

To the op, without knowing what lobes are on the cam,there is no way to tell how much spring pressure is needed. Some lobes(depending on the rest of the valvetrain) will be happy with 250-260 lbs of seat pressure and others need much more-the spring rate makes a huge difference as well. Either way,those patriot springs aren't going to cut it.

Firehawk441

iTrader: (41)

I don't know what you feel is correct geometry. You obviously see something different then I...
In my experience, I've found it physically impossible to use a T&D system on my solid roller builds.
Debating this with someone I don't know is senseless to me...