Devin D Porsche Race Car Project

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C J Murray
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Re: Devin D Porsche Race Car Project

#121 Post by C J Murray » Wed Feb 13, 2019 7:14 pm

The Devin gets put into the trailer tomorrow. We head to FL Friday with Sebring at the end of the month.
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'57 Speedster
'59 Sunroof
'60 Devin D Porsche Race Car - Finally Finished!
'63 GS 2133 coupe
'64 Elva Courier mk4T
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Vic Skirmants
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Re: Devin D Porsche Race Car Project

#122 Post by Vic Skirmants » Thu Feb 14, 2019 9:08 am

Sure hope you have the rear engine sealing tin.

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neilbardsley
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Re: Devin D Porsche Race Car Project

#123 Post by neilbardsley » Thu Feb 14, 2019 9:32 am

What type of distributor is that?

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C J Murray
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Re: Devin D Porsche Race Car Project

#124 Post by C J Murray » Thu Feb 14, 2019 10:03 am

Vic Skirmants wrote:
Thu Feb 14, 2019 9:08 am
Sure hope you have the rear engine sealing tin.
Useless weight on the track. :D
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C J Murray
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Re: Devin D Porsche Race Car Project

#125 Post by C J Murray » Thu Feb 14, 2019 10:09 am

neilbardsley wrote:
Thu Feb 14, 2019 9:32 am
What type of distributor is that?
MSD, I used the same on the previous racer. For the street the 123 is better but when using the MSD box and running at full advance most of the time the MSD distributor is better.
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Vic Skirmants
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Re: Devin D Porsche Race Car Project

#126 Post by Vic Skirmants » Thu Feb 14, 2019 10:13 am

C J Murray wrote:
Thu Feb 14, 2019 10:03 am
Vic Skirmants wrote:
Thu Feb 14, 2019 9:08 am
Sure hope you have the rear engine sealing tin.
Useless weight on the track. :D
Yes; hot air off the track is certainly lighter than cold air.

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Charles H Jacobus
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Re: Devin D Porsche Race Car Project

#127 Post by Charles H Jacobus » Thu Feb 14, 2019 4:13 pm

Wouldn't that add to drag? Seems there would be a lot of burbling going on.

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Re: Devin D Porsche Race Car Project

#128 Post by C J Murray » Thu Feb 14, 2019 5:18 pm

Vic Skirmants wrote:
Thu Feb 14, 2019 10:13 am
C J Murray wrote:
Thu Feb 14, 2019 10:03 am
Vic Skirmants wrote:
Thu Feb 14, 2019 9:08 am
Sure hope you have the rear engine sealing tin.
Useless weight on the track. :D
Yes; hot air off the track is certainly lighter than cold air.
At 100+mph I expect some fresh air to find its way to where it is needed.
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Re: Devin D Porsche Race Car Project

#129 Post by Erik Thomas » Fri Feb 15, 2019 8:57 pm

CJ I am looking forward to the race report. Devin looks great. Always had a sneaker for those cars.

Regarding the hot air in the engine compartment: On the Formcar-Porsche, I ducted the air intakes to the carbs to a separate intake, and the fan intake also to a separate intake ( the normal Porsche grille ) These are sealed with aircraft diaphram seals. Recently, I have been working on a belly pan that seals off the underside. The sump and transmission drain poke out the bottom. The goals of all of this are to keep cold air on the intake sides, and warm air only out the designated exit.

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Re: Devin D Porsche Race Car Project

#130 Post by C J Murray » Sat Feb 16, 2019 8:53 am

Erik Thomas wrote:
Fri Feb 15, 2019 8:57 pm
CJ I am looking forward to the race report. Devin looks great. Always had a sneaker for those cars.

Regarding the hot air in the engine compartment: On the Formcar-Porsche, I ducted the air intakes to the carbs to a separate intake, and the fan intake also to a separate intake ( the normal Porsche grille ) These are sealed with aircraft diaphram seals. Recently, I have been working on a belly pan that seals off the underside. The sump and transmission drain poke out the bottom. The goals of all of this are to keep cold air on the intake sides, and warm air only out the designated exit.
Hi Erik, I can't argue with the heat concerns. When I was considering what to do about it and looking at what Devin did I decided to do nothing(easy) and see what happened. I looked at the old Porsche Spyders and they didn't do much in that regard. It seems to me that you either have to control the air very effectively or you would be better off with no control at all where lots of fresh air is rushing all over. Chances are that there will be many teething problems with the Devin and this may be one. Thanks
'57 Speedster
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'60 Devin D Porsche Race Car - Finally Finished!
'63 GS 2133 coupe
'64 Elva Courier mk4T
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Re: Devin D Porsche Race Car Project

#131 Post by C J Murray » Sat Feb 16, 2019 9:09 am

Snow racing?
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'57 Speedster
'59 Sunroof
'60 Devin D Porsche Race Car - Finally Finished!
'63 GS 2133 coupe
'64 Elva Courier mk4T
'67 911 S Original Owner

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Wes Bender
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Re: Devin D Porsche Race Car Project

#132 Post by Wes Bender » Sat Feb 16, 2019 12:03 pm

You could put provisions on the front for a snow plow, but then again there's that weight issue.....

Beautiful car, Cliff.
Some days it just isn’t worth the hassle of chewing through the restraints......

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Re: Devin D Porsche Race Car Project

#133 Post by Alan Hall » Sat Feb 16, 2019 6:43 pm

C J Murray wrote:
Sat Feb 16, 2019 8:53 am
Erik Thomas wrote:
Fri Feb 15, 2019 8:57 pm
CJ I am looking forward to the race report. Devin looks great. Always had a sneaker for those cars.

Regarding the hot air in the engine compartment: On the Formcar-Porsche, I ducted the air intakes to the carbs to a separate intake, and the fan intake also to a separate intake ( the normal Porsche grille ) These are sealed with aircraft diaphram seals. Recently, I have been working on a belly pan that seals off the underside. The sump and transmission drain poke out the bottom. The goals of all of this are to keep cold air on the intake sides, and warm air only out the designated exit.
Hi Erik, I can't argue with the heat concerns. When I was considering what to do about it and looking at what Devin did I decided to do nothing(easy) and see what happened. I looked at the old Porsche Spyders and they didn't do much in that regard. It seems to me that you either have to control the air very effectively or you would be better off with no control at all where lots of fresh air is rushing all over. Chances are that there will be many teething problems with the Devin and this may be one. Thanks
Cliff,
I don't know about 550's but pretty sure RSK and RS60/61 had full bellypans that seperated exhaust area and cooling exit air from fan inlet and carb inlet air.

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Jack Walter
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Re: Devin D Porsche Race Car Project

#134 Post by Jack Walter » Sat Feb 16, 2019 9:42 pm

That's a gorgeous car Cliff - good luck at Sebring. 550's didn't have much air management under the rear deck either.
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Erik Thomas
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Re: Devin D Porsche Race Car Project

#135 Post by Erik Thomas » Sun Feb 17, 2019 1:08 am

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Here is a picture of the Formcar-Porsche air box that directs air into the cooling fan. The flat pans part way up the velocity stacks fit tightly in to the carb air intake bumps. Once I get the belly pan installed, air from the cooling fan exits though the wheel arches and two vents at the rear. The reason I have gone to all this trouble, is that dirty air covered with tire dust and other crap was circulating in the engine compartment. I also think that was causing a lot of drag. Now the car has a smooth profile underneath from nose to tail.

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