Straightliner59 Posted January 28, 2023 Author Share Posted January 28, 2023 2 hours ago, Ian McLaren said: Great update, you have really improved the engine. Both the block and heads make a big difference. Well done! I can however see a possible issue with boring the block to fit the 4 D shaped pistons. It must have been an early "D"onovan deal. Yeah, I haven't been able to figure out how they managed that! Impressive! 😄 Quote Link to comment Share on other sites More sharing options...
Straightliner59 Posted January 28, 2023 Author Share Posted January 28, 2023 2 minutes ago, Joe Nunes said: A real treat to see this coming together! 👌 Joe Thank you, Joe! Quote Link to comment Share on other sites More sharing options...
Straightliner59 Posted January 28, 2023 Author Share Posted January 28, 2023 I've done some more work to the manifold. I added the rear intake runners, made it taller, and added the boss for the pressure relief valve. I found some springs for the cover plate, which I am in the process of milling. I'm pretty excited, working on it! Thanks for looking! 1 Quote Link to comment Share on other sites More sharing options...
Joe Nunes Posted January 28, 2023 Share Posted January 28, 2023 The engine is coming along great, a model all by itself within a model. Your photos and commentary are really appreciated. 👌 Joe Quote Link to comment Share on other sites More sharing options...
Straightliner59 Posted January 29, 2023 Author Share Posted January 29, 2023 8 hours ago, Joe Nunes said: The engine is coming along great, a model all by itself within a model. Your photos and commentary are really appreciated. 👌 Joe Thanks again, Joe! I'm happy that you appreciate this stuff! I feel like I actually accomplished something with the mill, today! Here's the blower pressure relief plate/panel. The springs are some I found in a drawer of miscellaneous metal bits. I'll likely use model RR NBW castings for the spring retainers. It's not perfect, but, it's the smallest, most detailed piece I've made, yet, with the mill. I'm pretty happy with the way this is coming along. Although it's a Hemi-powered FED, the fact that the engine's a late(r)-model Donovan, and will be equipped with the Shotgun injector, will make it unique. As always, questions, critiques and comments are always welcomed and appreciated. Thanks for looking! 1 Quote Link to comment Share on other sites More sharing options...
iBorg Posted January 29, 2023 Share Posted January 29, 2023 Since you have a mill and a rotary table, why not make bolt heads for the spring retainers? Quote Link to comment Share on other sites More sharing options...
Straightliner59 Posted January 29, 2023 Author Share Posted January 29, 2023 1 minute ago, iBorg said: Since you have a mill and a rotary table, why not make bolt heads for the spring retainers? It's a thought, but, if I already have something that will work, it's time I could save for other pursuits. 🙂 I'm not 100% sure I have exactly what I'll need, so, it could happen... Quote Link to comment Share on other sites More sharing options...
Straightliner59 Posted January 30, 2023 Author Share Posted January 30, 2023 I got some more work done to the engine. I made a fuel pump, and tacky-glued the idler pulley bracket on. I'm going to have to swap the crank pulley--need a little less overdrive on the blower!😄 I'm as yet undecided as to the valve covers. I have a couple of options--or, I could try my hand at milling a pair. I recently bought some aluminum stock, just in case. It's coming along! Comments are welcomed and appreciated. Thanks for looking! 3 Quote Link to comment Share on other sites More sharing options...
Tortuga Kustomz Posted January 31, 2023 Share Posted January 31, 2023 That/s awesome, i learn something new every day thanks for the info man Quote Link to comment Share on other sites More sharing options...
Straightliner59 Posted January 31, 2023 Author Share Posted January 31, 2023 1 hour ago, Tortuga Kustomz said: That/s awesome, i learn something new every day thanks for the info man Thanks, Marcos! I noticed that the cogs on the crank pulley were very tall. I was able to gain the needed space by simply sanding them down. That worked out, well, considering I was struggling to get a new one cast. 1 Quote Link to comment Share on other sites More sharing options...
bobthehobbyguy Posted January 31, 2023 Share Posted January 31, 2023 Nice work. What are you going to use for the blower belt. Quote Link to comment Share on other sites More sharing options...
Straightliner59 Posted February 1, 2023 Author Share Posted February 1, 2023 (edited) 14 hours ago, bobthehobbyguy said: Nice work. What are you going to use for the blower belt. Thanks, Bob. I will likely use some sort of tape, and make the Gilmer drive cogs from strip styrene. I did a fuel motor years ago, and did that with masking tape. It worked out, pretty well, and is still together! I'll use smaller stock, this time around! 🙂 Edited February 1, 2023 by Straightliner59 1 Quote Link to comment Share on other sites More sharing options...
Straightliner59 Posted February 1, 2023 Author Share Posted February 1, 2023 19 hours ago, bobthehobbyguy said: Nice work. What are you going to use for the blower belt. Bob, you got me thinking about just how to go about this. I was turning a crank pulley, because I wanted to see how my knurls would look for the drive cogs. Looking at the knurls on the aluminum stock, I got the idea to roll the knurled stock down a .125" strip of styrene. I'll need to come up with a way to apply even, and greater pressure to the strip, but, I think this shows promise! Thank you, sir! I made spark plug tubes from 1/16" aluminum tube. I decided on these valve covers. They'll get a little work. I also replaced the fuel tank supports. I think that only leaves one thing, a mounting pin, to solder to the chassis before that's all done--I think.😀Thanks for looking! 2 Quote Link to comment Share on other sites More sharing options...
Tortuga Kustomz Posted February 2, 2023 Share Posted February 2, 2023 awesome details man in that engine, looking forward to see more of the new setup 1 Quote Link to comment Share on other sites More sharing options...
Straightliner59 Posted February 2, 2023 Author Share Posted February 2, 2023 6 hours ago, Tortuga Kustomz said: awesome details man in that engine, looking forward to see more of the new setup Thanks, my friend! I got the breathers pinned into place. Then, I decided it was time to play with my toy, and set it together.😀 I knurled a 1" diameter aluminum rod, to see if that would give better results creating the drive cogs on the blower belt. Simply rolling it over the strip doesn't create quite enough relief to make them readily visible. I will have to make some sort of tool to apply mechanical pressure, with a knurl on one side and a smooth roller, on the other. I am fairly confident that this is the right path. 2 Quote Link to comment Share on other sites More sharing options...
Straightliner59 Posted February 3, 2023 Author Share Posted February 3, 2023 After some more experimentation, I think I have my blower belt material. I used the heavier knurled rod, rolled over wine bottle foil. It's my favorite material for making seat belts, because it's easy to work. It looks like it'll work, here, as well! I guess I'll be making new blower drive pulleys, too. I painted this piece of belt with Tamiya Tire Black spray. I think a charcoal grey would be best, because then, a wash of flat black will really make the cogs pop. What do you guys think? 4 Quote Link to comment Share on other sites More sharing options...
Straightliner59 Posted February 4, 2023 Author Share Posted February 4, 2023 (edited) Mallory Supermag 3. I used the cap from a casting that I can't recall where it came from, and turned the body from aluminum knitting needle. The shaft is 1/32" brass tube and the "stop ring" is 1/16" aluminum tube. The retainer cap is a disc punched from an old long-distance phone card. I just realized that, as much as like the breathers, I can't use them. The engine needs puke hoses and tank, instead. Duh! Thanks for looking! Edited February 4, 2023 by Straightliner59 3 Quote Link to comment Share on other sites More sharing options...
AmericanMuscleFan Posted February 4, 2023 Share Posted February 4, 2023 A lot of good ideas create something out of the ordinary and we have a good example here, I especially like the blower belt, the result is convincing and impressive! 👍 1 Quote Link to comment Share on other sites More sharing options...
Scott Colmer Posted February 5, 2023 Share Posted February 5, 2023 Excellent stuff, Daniel. Love the belt drive idea. I think I may give it a try. Scott 1 Quote Link to comment Share on other sites More sharing options...
Straightliner59 Posted February 5, 2023 Author Share Posted February 5, 2023 11 hours ago, AmericanMuscleFan said: A lot of good ideas create something out of the ordinary and we have a good example here, I especially like the blower belt, the result is convincing and impressive! 👍 2 hours ago, Scott Colmer said: Excellent stuff, Daniel. Love the belt drive idea. I think I may give it a try. Scott Francis and Scott, thanks for your kind words. They are very much appreciated! I'm pretty happy with the Gilmer drive. It looks very much to scale. I used an 80 TPI knurl. I think 60 or 70 would be okay, but this scales out to (I think) 3/8", which isn't too far off the cogs that are left on the one hanging on my shop wall!😀 Quote Link to comment Share on other sites More sharing options...
iBorg Posted February 5, 2023 Share Posted February 5, 2023 Dan, how did you do the knurling? Quote Link to comment Share on other sites More sharing options...
Tortuga Kustomz Posted February 5, 2023 Share Posted February 5, 2023 that's very cool, love the distributor man Quote Link to comment Share on other sites More sharing options...
Straightliner59 Posted February 5, 2023 Author Share Posted February 5, 2023 4 hours ago, iBorg said: Dan, how did you do the knurling? Sherline 80 TPI knurls on the lathe. 1 hour ago, Tortuga Kustomz said: that's very cool, love the distributor man Thank you, Marcos. It should look pretty cool, once it's done. I plan to make 90 degree boots, to fit under the retainer cap. 1 Quote Link to comment Share on other sites More sharing options...
dragcarz Posted February 5, 2023 Share Posted February 5, 2023 Scratch building at its finest, very cool project! Quote Link to comment Share on other sites More sharing options...
Tortuga Kustomz Posted February 6, 2023 Share Posted February 6, 2023 22 hours ago, Straightliner59 said: Sherline 80 TPI knurls on the lathe. Thank you, Marcos. It should look pretty cool, once it's done. I plan to make 90 degree boots, to fit under the retainer cap. Thant sounds nice, i've been planning how to do that for my Camaro, hope to do a good job on that, i know you will do an awesome job on it Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.