Just put one on the '57 this past weekend. Trying to keep temps under control between rounds. No real results yet, but the difference after 10 minutes running in the garage after installation were encouraging.

Warning, though: Don't assume it's a "bolt-on". I was checking the adjustment of the TH400 kick-down switch, and it wasn't even close to engaging.

Turns out the fast idle adjustment screw was hitting the shield. The cut-out on the passenger side was about 1/2" too short. Easy to fix, but if I hadn't checked, I'd have been short about 15 degrees of throttle opening.

Also discovered the kick-down switch itself was hitting the shield. Also easy to fix, but...

Will see how it works in action tomorrow night.

 

Is that the metal shield that bolts down with the gasket between the carb and the manifold? I've been considering getting a qjet one, but since I have a 1" spacer already, not really sure if its worth the expense. What differences have you noticed so far?

 

Heh, I made my own a couple years ago out of aluminum... dunno if it did any good or not but what the hey

 

Yes, pre-fabricated aluminum, regular gasket between manifold & shield, about 1/2" thick gasket b/t shield & carb (gaskets came with it). Shield is about 1/8" thick. Required longer studs to install, is in effect a short spacer.

I had it running about 10 minutes, idling & reving. After it sat for about 15 minutes after shutting it off, manifold pretty much hot to touch - carb was "cold". Without shield, carb would have started "cooking" in that time, from my experience.

I'm taking it out to Bandimere tonight, I'll be able to judge its effectiveness better then.

You could fabricate one yourself, buying one insured it was flat & burr-free at the sealing surfaces.

 

You know, I have one of those Mark Horton 1" spacers & I'm impressed with it's insulation performance.
Really the only thing I can compare it to is the Edelbrock insulators & the Horton is straight up better.
I've taken out a few times around here, and the Holley is always cold to the touch.
To be honest I don't have a hood yet, but when I do I might just need one of those plates. Well see...

Ron

 

How'd it work out?

 

It was one of those wierd nights where there was so much time between rounds that the car cooled down without needing to be sprayed down, even. So, it wasn't much of a test. Haven't been back out since (missed last weekend because I'm out of town on business).