400BB hard to start when hot

[furyus]

What about a cool can, like used to be popular back in the 70's. It had the insulated can with a coil of aluminum fuel line inside. That way the fuel will act somewhat like a coolant. Hopefully keeping the carb cooler. Not sure what you could do to keep the fuel cool on long drives, as the ice in the cool can will melt.

 

[Budnicks]

Not sure if this was covered or not ?

Especially with Iron heads, performance engines make allot of heat
{yes & even with the turbo rear mounted, it's added heat, compression/thermal energy}
&
the exhaust/heat-riser passage in the heads,
it transferring heat, to the intake manifold,
mainly for smog & cold start/choke operation,
you can block off the heat-riser passage to the intake manifold,
it's just a simple gasket &/or valley pan change,
the phenolic spacer & a heat shield under the carb for deflection, won't hurt either...

good luck

 

[evilmopar]

I've been thinking of blocking the heat passage in the intake but haven't got the thumb out yet to order a new valleypan and a new intake (need a singleplane to make the turbo setup work better).
But if i remove the intake and cast a aluminum blocking in the intake, that would work to, or what do you guys think?

 

[coloradodave]

I've been thinking of blocking the heat passage in the intake but haven't got the thumb out yet to order a new valleypan and a new intake (need a singleplane to make the turbo setup work better).
But if i remove the intake and cast a aluminum blocking in the intake, that would work to, or what do you guys think?

I agree with Budnicks. Try this: http://www.summitracing.com/parts/hly-108-70/overview/ and definitely block off the heat riser passages. Casting plugs would be a great solution, although there are easier ways, as have been pointed out. I used the Holley heat reflector gasket/spacer set-up on a friend's motor with good results. Good luck and keep us in the loop.

 

[evilmopar]

Today there is a small car show in town and the weather is on our side so FINALY i can do some testing and take som pictures with the thermalcamera. I´ll post the pics as soon as i can.

 

[evilmopar]

The first pictures is when i got back after a test drive... the others after sitting 15min with hood closed. And one picture of the starter after 15 min.. just for the fun..
The outside temperature was around 50F.