Ford GT40 289 Race project,Shelby/Cobra intake plenum finalized , tested with Wilson manifold spacer
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- Опубліковано 8 січ 2025
- Final plenum work on the Cobra/Shelby dual plane. We also test it with a Wilson four hole tapered spacer through the head and carb.
You Sir are a virtuoso of the carbide.
👍👍
@@hotrodray6802 Thanks!
You did an amazing job equalizing the runners. . that a impressive .the numbers are impressive too.good job sir
@@clarkmcmahan1595 Thanks Clark
It was cool t see ur manifold to perform well Charlie
@@rickyfulks6656 I was thrilled! Thanks
Awesome progression on the manifold! I think most people (me included) underestimate the intake manifold as a restriction on a good flowing set of heads. I also wanted to point out something that i noticed on my 454 Marine engine, the shallow side of the plenum (upper runners) has only like 1/2" of vertical depth from the top of the runner to the carb base ( top left of 3:10 is good example ). My quadrajet secondaries are huge and hang down into the plenum over an inch, effectively blocking a portion of the rear upper runner. A spacer is definitely a must to bring the butterflies up and out of the port.
@@robtdougherty Good point!
Lots of time you have invested there. Humbly, i tried to streamline a C5 cast iron 4bbl manifold back in the early 80's. Just to radius the ssr in the plenum took many hours. Engine was a 306. 360hp at 5800rpm. 21mpg with a c4 and 2.79 rear gear. Car was very streetable and fast (69 Fastback). Fun times back then. Thanks for making these informative videos. Happy New Year.
@@rennypizarro4432 Tons of work no doubt. That was a good runner. Happy New Year!
Outstanding Charlie. A++++. I can see a good flat torque curve.
@@dondotterer24 Thanks!
Great video
@@SalterRacingEngines Thanks Brian!
Thank you for sharing this!
@@blkcoupequattro You are welcome
Have you ever tried to run a spacer backwards? One of those plastic spacers installed pointy side up actually made gains for Eric Weingartner. Ask him about it.
@@rolandotillit2867 Never
I always liked a radius on top of my center divider instead if a knife edge. My thoughts are that the sharp edge slows the air from crossing from the opposite plenum.
Your thoughts?
@@slicepizza3263 Mine is offset to add air to upper H of plenum. Thanks
Nice work 👍🏻
@@merrittmagruder3122 Thanks
After finalizing a dual plane like this have you ever had one extrude honed or is it just not worth it because i smooths out to much to keep the fuel whipped up?
@@pirateshipping817 Not a fan of extrude hone. Takes material in the wrong places. Thanks
Excellent work!!! I think the flow change with the spacer for cyl 7 makes me wonder if the spacer is redirecting the air flow … wondering if an open 1 inch spacer would correct that..
Stay tuned!
@ thanks
I am sorry, but I can't agree with this making any low speed torque, especially below 3500 rpm. I have yet to see that large cutout in the divider make any torque, and only a few more horsepower at ultra high rpm. Every dyno test I have participated in with dual plane intakes had a huge dip in the torque curve with that cut down. My EMC engine making over 613hp made the best torque with a regular divider in the dual plane intake at 592hp, and 613hp with single plane intake. I hope you can prove me wrong.
@joecraine4660 It will take a hit below 3500 but it may not be that bad. We will find out. Thanks
There is lot of thinking and hand fatigue
@@MP-pz9oe Nah. Hands are fine. Thanka