guide plates

Does the blue thunder heads use the same push rod guide plates, as the doves?

Yes, but you may have to cut and weld them.
Cheers Colin.

Thanks, it figures, nothing else is going right.

Harold,

X2 on what Colin said. Cut the guide plates and reweld them. The B.T. heads have the guide centers spread. So therefore you must carefully check your piston to valve relief clearance and be prepared to remachine your valve reliefs in the pistons. Also, double check with Jomar or Lem, but if I remember correctly the B.T. heads take a different rocker stud girdle. I have slept a few times since then, so.......?

BT moved the valve centers.....not the rocker studs. They should take the same stud girdle.

What Lem said, same stud girdle. cheers Colin.

My mistake, thanks for the correction.

Charlie

Lem Evans wrote:BT moved the valve centers.....not the rocker studs. They should take the same stud girdle.

Lem,is the combustion chambers similar to a Dove and A429? Harold has a Dome piston and was wondering if there might be clearancing problems.

It's been years since i've had those heads in my hands.......Charlie is working on an iron set maybe he'll jump in on this.

Here's a pic of a BT chamber if it helps. It's the 80cc version. Charlie had freshened them for me just before I sold them about 2 1/2 yrs ago.



Harold, the guide plates on mine were just regular Manley plates for the BBF. You will need to cut them, but not all the way through. Make a cut on the intake side that goes almost all the way through. Just leave about .100" or so holding the two halves together. Use a screwdriver blade in the slot you cut and just slightly tweak them. Tighten the studs down and tack weld them back in place. It's not needed, but I took mine off after they were tacked and fully welded the slot, then ground the weld down. Pay no attention to my ugly ass welding, they worked fine.

342g wrote:Does the blue thunder heads use the same push rod guide plates, as the doves?

im guessing you got the BT heads you were wanting

Harold gets everything he wants.

I've got a429 and had to cut and weld mine later a buddy was working on his motor the plates were not working he used a .400+ shim in the push rod slot and a cresent wrench and tweek the plate around work like a champ could'nt believe how good it worked
dragweek quickest street rod
2009 2010

Harold,when you get the heads on,I will help you w/it.

bbf-falcon wrote:Harold,when you get the heads on,I will help you w/it.

I will prolly hold you to that.

whats goin on in here?

138 wrote: whats goin on in here?

Everything is a p.i.t.a.