Nice work. Have a Happy New Year. Keep the videos coming.

Thank you Brian, for the time you take to make videos. Happy New Year !!!!

@metalshaperJeep

2 жыл бұрын

Happy new year to you and yours Jack, lets hope for a good one. See you in 2022

Wonderful video. Well explained

@metalshaperJeep

2 жыл бұрын

Glad you liked it!

Very impressive. Back when I was doing heads for an engine rebuilding shop I thought I was doing great to do a three angle valve job. I wish I had access to the equipment you can bet I would be doing this on all my jeeps. Might take a long time to do all four of them. Thank you so very much for all your time you invest Have a safe and happy New Year

@metalshaperJeep

2 жыл бұрын

Good to hear from you Kent, glad you enjoyed the video. If you have done heads in the past you know exactly what I am trying to show people here. Thanks for watching and have a great new year.

We did something very similar to this to put Chevy valves in my 1978 258 performance build back in 1990. There was very little 258 performance parts for sale back then compared to today. Still running it to this day. Amazing torque and power.

@metalshaperJeep

2 жыл бұрын

I have been doing this modification for a long time and it does make a big difference in power. Glad you are getting the benefits of it in your jeep.

That is so freaking awesome! Beautiful job as always Brian! Happy New Year’s!🇺🇸🇺🇸🇺🇸🇺🇸🇺🇸

@metalshaperJeep

2 жыл бұрын

Thanks 👍

Happy New Year Brian, its a very interesting to see how you put a engine together. Always enjoy watching your work, and explaining the steps involved.

@metalshaperJeep

2 жыл бұрын

Hello Bill, glad you enjoyed the video...... more coming. Have a great new year

Great video Brian, Happy New Year! The old 258 should really run nice with all the improvements you are making. I used to do a lot of this kind of work on air cooled VW and motorcycle engines. It really makes a difference. Thanks for sharing. See you next year.

@metalshaperJeep

2 жыл бұрын

Thanks for watching Jeff. Good to know others out there are doing this kind of work and understand the difference it makes. Have a great new year, see you in 2022

Happy New year Brian... I enjoy learning the performance enhancements you are sharing with us. I really like the 258 American Motor performance enhancements because it is an iron head and block. Aluminum is a weaker material compare to iron for longevity ( i.e. 50 + years ) of service I expect from a Jeep. Thank you!! for sharing!!!

@metalshaperJeep

2 жыл бұрын

I also like the 258 engine and they do last a long time and can be modified for better performance like I am showing here.

Happy New Year

@metalshaperJeep

2 жыл бұрын

Thanks for watching Al. Lets hope we all have a better new year

Happy new year Brian

@metalshaperJeep

2 жыл бұрын

Same to you!

Awesome 👍

@metalshaperJeep

2 жыл бұрын

Hello Lee, thanks for watching and have a great new year

To optimize that increased flow do you run a particular cam? How would you compare the performance of this modification to a stock 304? I’m finding this 258 build especially interesting 💪💪🇺🇸

@metalshaperJeep

2 жыл бұрын

a well built 258 will feel as good or better than a stock 304. Add gears to the mix and you will have a super responsive and powerful 258 rig. I do use a lot of different cams based on what I want out of the engine. Will be showing the cam and discussing them when I get to that point in the build.

@RADIOACTIVEMASCULINITY

2 жыл бұрын

@@metalshaperJeep I’m really looking forward to seeing this come together and listening to your choices on components

How much gain do you estimate you got for upgrading the valves? When I had my daughters 258 rebuilt I did not know about this upgrade. I did put a small RV cam for torque. These engines are known for getting warmer at the 5/6 cylinders, do you know a way to correct this heating issue?

@metalshaperJeep

2 жыл бұрын

The horsepower gain depends on how much cylinder head work you do. with larger valves, porting work, milling head for increased compression etc...... will add just over 50 hp when matched with a good camshaft. I have never had a 258 have a hotspot between 5/6 cylinders, but have traced the problem to blocks that have a lot of junk in the cooling system. Once boiled out and rebuilt no problems.

Nice work and vid! I've heard of going to a 1.875 intake, but not the 1.94. It looks like a lot of material is going to be removed. Just curious what your thoughts are on how much material there is before you get into water (?). You sound pretty experienced at this, so I figure you'd know.

@metalshaperJeep

2 жыл бұрын

1.94 intake valves have been installed in hundreds of 258 cylinder heads without any trouble. There is no need to be concerned with cutting out too much material.

Hey Brian, I'm so grateful to come across your video and look forward to checking all of them out. I'm now the owner of my father's 89 yj, and unfortunately, the motor needs rebuilt. I want to take the opportunity to improve it performance and keep it as original as possible. Lost dad to cancer 16 years ago, and this build is for him. Do you take on any of this work? If so, how do i reach you? Is there any way to contact you? I have a 4.2 258 in a yj. I would prefer to not do the 4.0 head swap. Its carburetor is a motorcraft 2150 and plan on keeping it the way he left it. I'm in PA with a PA classic tag and emissions is not an issue.

Isn't a deshroud important to get the most out of it?

@metalshaperJeep

2 жыл бұрын

There are a lot of dimensions and tricks to getting the chamber shaped correctly for the best power. I have decided not to show it any further.

@skylinefever

2 жыл бұрын

@@metalshaperJeep Oh, okay. Thanks.

Couldn't you go in there with a piece of high speed steel 30 degrees or so off the vertical axis? I saw this done on another video on 324 olds heads. I think it's on KZread fiatnuts I'm just asking, not telling you how to do it.

@metalshaperJeep

2 жыл бұрын

There are a lot of ways to do any job. I am showing how I do it with hand tools and stones. Very easy to hold the head on the seat and guide machine and not worry about setting it up on a milling machine. Can't make a cut like that on the seat and guide machine and I prefer everything gets located off the valve guide with a pilot to keep everything concentric. I have been doing this modification for many years and prefer to do it the way I have shown. Anybody else is welcome to do it as they choose.

@robertwatkins364

2 жыл бұрын

@@metalshaperJeep okay sounds good to me.

It's impossible to understand you with the machinery in operation .