New Peanut Port Head Test
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New Peanut Port Head Test
Since the racing season is winding down up here I thought I would test my 8 to 1 compression peanut port BBC again with some 360 castings I ported a few years ago. The 1st pass was ehh, not so good as the engine was shooting ducks and I though it was a valve spring or timing issue. Turned out to be the 750 Demon was too lean, so on went the 850 Mighty Demon. The car picked up 3 tenths and 3 mph so I was pretty happy. As the day went on I had limited time to test much else. I put the 2" tapered spacer on and the car really liked that. I ended up at 11.20's@116 with the new heads and Holley Strip Dominator. I think for the next test I will try the Air Gap and my Crower cam that has a tighter LCA pretty sure it could use some more low end power. Who knows might be a 10.99 there.
Re: New Peanut Port Head Test
Awesome, what kinda car is it? How big is the BBC?
We are putting together I'd guess, the Ford variant of the Peanut ports, a 460 with the EFI heads. I like them a lot.
We are putting together I'd guess, the Ford variant of the Peanut ports, a 460 with the EFI heads. I like them a lot.
Magnús Aðalvíkingur Finnbjörnsson
Re: New Peanut Port Head Test
You know I like a good peanut port drag test
Racing a NA NHRA stocker should be mandatory before any posting.
Re: New Peanut Port Head Test
Hence your quoted threads below?
Felix, qui potuit rerum cognscere causas.
Happy is he who can discover the cause of things.
Happy is he who can discover the cause of things.
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Re: New Peanut Port Head Test
Your not going to find much low end gain by means of a Cam change with only 8 to 1 comp!
I would be doing all I could to get the comp into the 9.5 area!
I would be doing all I could to get the comp into the 9.5 area!
You can cut a man's tongue from his mouth, but that does not mean he’s a liar, it just shows that you fear the truth he might speak about you!
Re: New Peanut Port Head Test
I don't know but I am willing to bet that if the cam were on a 106° LCA it would be stronger on the low end. Maybe someone will chime in on that.
I know the little Hyd. cam in my Vortec 406 was on a 106 LCA and it got me in the 10's.
Re: New Peanut Port Head Test
The 10.68 was the first time out in a 27.60 baro, after it was dialed it ran 10.34 in a 28.80 baro......keep working
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Re: New Peanut Port Head Test
Sure raise the bar a little higher
Re: New Peanut Port Head Test
Just swapped out the Strip Dominator for the RPM Performer to see if the dual plane will be quicker and faster. While I have my doubts Marks has proven that they do work on his peanut port stuff so I am going to give it a try.
Re: New Peanut Port Head Test
Heres the post dyno test of my peanut port after running the engine in my car for a season. Maybe this will give you some data to work off of.
Notice the average power along with the power carry.
https://youtu.be/DjIVRz_w9bw
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Re: New Peanut Port Head Test
Thanks Mark, I am hoping the RPM will perform better than the single plane, thanks for the info. Looks like the numbers you have are pretty good.vortecpro wrote: ↑Mon Oct 05, 2020 7:54 pmHeres the post dyno test of my peanut port after running the engine in my car for a season. Maybe this will give you some data to work off of.
Notice the average power along with the power carry.
https://youtu.be/DjIVRz_w9bw
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Re: New Peanut Port Head Test
Morel race hyd roller lifters. Cam was 228/238/111/553/578.
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