Turkey Pan

[pusherfans]

other plugs....

[Rick Parker]

I think what you will find is that the TP (Which in a perfect world should be sealed to the underside of the hood) prevents radiated heat from being absorbed by the carburetor BUT forces ALL the Intake air to be pulled through the hood scoop. Now you say that your scoop isn't sealed to the TP, then you are pulling all the HEATED air from the top of the engine compartment into the carb. You spend thousands for the trickest heads, had them ported (more$$$), spent $800 for the latest and greatest Holley and then choke it down by forcing it to swallow nothing but hot air via a very poor path. The air/fuel ratio becomes out of wack (hot air) at a give throttle position. This is why it happens when you close the hood. Same thing happens with Webers, you're pulling the air of of the upper heated layer within the engine compartment.

[pusherfans]

Originally Posted by Rick Parker

I think what you will find is that the TP (Which in a perfect world should be sealed to the underside of the hood) prevents radiated heat from being absorbed by the carburetor BUT forces ALL the Intake air to be pulled through the hood scoop. Now you say that your scoop isn't sealed to the TP, then you are pulling all the HEATED air from the top of the engine compartment into the carb. You spend thousands for the trickest heads, had them ported (more$$$), spent $800 for the latest and greatest Holley and then choke it down by forcing it to swallow nothing but hot air via a very poor path. The air/fuel ratio becomes out of wack (hot air) at a give throttle position. This is why it happens when you close the hood. Same thing happens with Webers, you're pulling the air of of the upper heated layer within the engine compartment.

you make an interesting point. So are you suggesting to pull the TP and put in a big air cleaner or to seal the TP to the hood?

The interesting point for me was that it was running great with the same air filter setup, but no TP. . . . and then suddenly this happened, so I am working on the ignition. Once that's done, if there is no improvement, I'll pull the TP and see how it runs and go from there. . . .

Thank you for your input, it does make a lot of sense!

[patrickt]

Originally Posted by pusherfans

... I'll pull the TP and see how it runs and go from there. . . .

I would just unbolt my hood and take it for a drive. That's a lot easier than taking your turkey pan off and then putting it back on again. If running without a hood doesn't change the performance one lick, then you need to look elsewhere....

[Rick Parker]

By putting the TP on you then force all the ingested air to be drawn from the upper reaches. Hot air being less dense causes the A/F ratio to change and it begins to be overly rich when the hood closes.

You could prop the rear edge of the hood open and test it for yourself.

[pusherfans]

TP was not the problem. it's a carb tuning problem. I started a new post in the Holley tuning area as I found started to think it's what it was. TP on and off, runs the same. It's an idle air issue I was having a problem with....just wanted to give this thread some "closure".

[pusherfans]

I bought a two piece Turkey Pan from Master Touch and it did not fit my throttle linkage and the fit and finish and aluminum type and customer service are all very different then what you get from the Kirkhams. This clearly explains the price diffence.

[mickmate]

I got a Mastertouch and it fit sweet, it's a beautiful piece. They were swamped with orders for a while after getting on the CC advertisers. They have made good on a couple of lost and slow orders I heard of.

[dcdoug]

I had mickmate make mine "convertible". Same as what Mastertouch does, but you send him your pan.

[pusherfans]

Got the carb issue fixed. See the post under Holley Tuning. I replaced it with a Street HP 4150 and 100 cfm smaller. Worked perfectly out of the box! See the post under Holley Tuning.