keeping fuel injections cooler

[Clem Z.]

after reading the FI article in "the corvette restorer" and the problem heat causes the FI unit and the recommendation of using a 160 degree water thermostat why not install a oil heat shield under the FI base plate to keep the hot oil,200+ degrees, off of the base plate. this heat is transferred to the whole FI unit because of the aluminum construction. this is what i do with intake manifolds to keep the hot oil off the bottom of the manifold and causing unequal fuel distribution. JMHO

[Don H.]

Re: keeping fuel injections cooler

You can use an early year plenum gasket that covers the entire base plate (intake). I am not sure the effective difference of having it above or below the plate. Don H.

[Rob M.]

Re: keeping fuel injections cooler

Clem,

What do you mean with "hot oil" and "oil" heat shield. There shouldn't be any oil in that area, should there?

greetings,
Rob.

[Gary C.]

Re: keeping fuel injections cooler

Clem, under the early large plenum black gasket reflective material such as HushMat. The black heat sink you recommend under the intake certainly should help. Any ideas how much the heat shield lowers the intake upper surface temperature? It's the intake upper surface heat radiation that causes the percolation problem with the FI spyder and lines. Thanks, Gary....

[Clem Z.]

Re: keeping fuel injections cooler

Clem,

What do you mean with "hot oil" and "oil" heat shield. There shouldn't be any oil in that area, should there?

greetings,
Rob.

hot oil from the tappet chamber is flying all around under the intake that is why GM puts that riveted on steel shield to keep the oil from "coking" up on the bottom of the heat riser crossover that is in carb intakes

[Clem Z.]

Re: keeping fuel injections cooler

Clem, under the early large plenum black gasket reflective material such as HushMat. The black heat sink you recommend under the intake certainly should help. Any ideas how much the heat shield lowers the intake upper surface temperature? It's the intake upper surface heat radiation that causes the percolation problem with the FI spyder and lines. Thanks, Gary....

all i know is from dyno test the shield allows for better fuel distribution because it keeps the hot oil which is hotter than the engine water temp off of the bottom of the intake.

[Clem Z.]

Re: keeping fuel injections cooler

You can use an early year plenum gasket that covers the entire base plate (intake). I am not sure the effective difference of having it above or below the plate. Don H.

the steel shield under ther manifold keeps the hot oil from the tappet chamber from hitting the bottom of the intake and causing a higher temp than the rest of the intake sees. remember the posts the other day about the L-88 oil shield under the intake manifold to keep the hot oil off of the under side of the intake.

[Rob M.]

Re: keeping fuel injections cooler

Mr. C,

I thought the rocker covers and gaskets should prevent oil to be spashed around from the tappet chamber towards the intake area? Or am I missing the something in this picture?

Added later: Aha, I see now. I was glancing to short at the attached photo, I can see now how this could work. Only question is: what is the little wire for between the two bolts?

regards,
Rob

[Clem Z.]

Re: keeping fuel injections cooler

Mr. C,

I thought the rocker covers and gaskets should prevent oil to be spashed around from the tappet chamber towards the intake area? Or am I missing the something in this picture?

regards,
Rob

on a small block chevys,big blocks also, the bottom of the intake is the cover for the tappet chamber. when you remove the intake you will see the push rods and tappets(lifters) and a lot of engine oil is thrown out of these items at speed which bounces off of the bottom of the intake raising it temp.

[Mike E.]

Re: keeping fuel injections cooler

Rob--
Safety wire to keep the bolts from backing out and the whole thing from banging around in an unwanted area.

[Joel F.]

Re: keeping fuel injections cooler

Only question is: what is the little wire for between the two bolts?

Rob,

Safety wire so the bolts can't work themselves loose.

[Stuart F.]

Re: keeping fuel injections cooler

Yes, safety wire. Used on aircraft engines and Corvettes - things of value.

That's a nice looking cover. Would be useful on carburated engines with aluminum intakes as well. Ya'll going to market that? Sure could use that on my L-76 63 SHP. Mine is the worst case scenario in Corvette history.

Stu Fox

[Clem Z.]

Re: keeping fuel injections cooler

Yes, safety wire. Used on aircraft engines and Corvettes - things of value.

That's a nice looking cover. Would be useful on carburated engines with aluminum intakes as well. Ya'll going to market that? Sure could use that on my L-76 63 SHP. Mine is the worst case scenario in Corvette history.

Stu Fox

that was my original use for the shield because aluminum intakes have only certain runners on the bottom that see the hot oil and this causes the unequal fuel distribution.

[Joel F.]

Re: keeping fuel injections cooler

Clem,

Is something like that available commercially?

[Clem Z.]

Re: keeping fuel injections cooler

Clem,

Is something like that available commercially?

not that i know of. maybe i should get a patent.