Casey Posted February 24, 2012 Posted February 24, 2012 I agree, they're far from perfect. I was commenting specifically on the area where the sidewall and tread meet, as the AMT tires seem to have been based of an existing radial tire.
ScottH454 Posted March 2, 2012 Posted March 2, 2012 I am building a camaro motion kit that I lost a back tire for. I bought a whole other kit for the back tires. So yeah I think their a nice tire. I've since gotten started with resin casting an also planned to make the tires.
Lownslow Posted March 2, 2012 Author Posted March 2, 2012 i like the tire it looks great under most muscle cars heres the other mickey thompson im casting soon i all of a sudden want to build a street freak car and these are the best tires for it.
shucky Posted March 4, 2012 Posted March 4, 2012 ?? what exactly is wrong Frank? What kind of mold rubber is that deep blue stuff ??
Lownslow Posted March 5, 2012 Author Posted March 5, 2012 (edited) mold star 30 it popped in the pot now all along both side walls are bubbles Edited March 5, 2012 by Lownslow
Chief Joseph Posted March 5, 2012 Posted March 5, 2012 Frank, when you say, "it popped in the pot," do you mean you were curing the rubber under pressure to reduce air bubbles? Pressure-curing works (I did it for a couple of years before I could afford a vacuum pump), but the big drawback is that the pressure has to remain fairly constant during the whole curing cycle. If the rubber is halfway cured, the air bubbles that are crushed by the air pressure will expand in the soft rubber and ruin the mold. Mold Star 30 cures in about 7-8 hours, which is pretty quick. Did your pressure fall off from 35-40lbs during that period? I'm not a huge fan of the Mold Star rubbers, even though I have been pouring molds with them all weekend. A good compromise between price and performance, but I wish they had more of the performance advantages of the old-fashioned Smooth-Sil platinum-cured rubber.
Lownslow Posted March 5, 2012 Author Posted March 5, 2012 (edited) Frank, when you say, "it popped in the pot," do you mean you were curing the rubber under pressure to reduce air bubbles? Pressure-curing works (I did it for a couple of years before I could afford a vacuum pump), but the big drawback is that the pressure has to remain fairly constant during the whole curing cycle. If the rubber is halfway cured, the air bubbles that are crushed by the air pressure will expand in the soft rubber and ruin the mold. Mold Star 30 cures in about 7-8 hours, which is pretty quick. Did your pressure fall off from 35-40lbs during that period? I'm not a huge fan of the Mold Star rubbers, even though I have been pouring molds with them all weekend. A good compromise between price and performance, but I wish they had more of the performance advantages of the old-fashioned Smooth-Sil platinum-cured rubber. the seal blew on the lid after 20 minutes, it was around 45lbs before i shut the valve off, i love mold star aside from the "it doesnt work well with tires" factor its a great compound for the price Edited March 5, 2012 by Lownslow
mikemodeler Posted March 5, 2012 Posted March 5, 2012 it's only flat on the bottom Frank! LOL Keep trying, you are more brave than I !
RyanSilva Posted March 5, 2012 Posted March 5, 2012 Yea thats the big downside to platinum when molding rubber tires as masters, I get through it by painting the tire with primer or a clear. I made new seals for my harbor freight pot with urethane rubber, so much better! between that and ball valves before and after the regulater I get constant pressure.
horsepower Posted March 6, 2012 Posted March 6, 2012 i like the tire it looks great under most muscle cars heres the other mickey thompson im casting soon i all of a sudden want to build a street freak car and these are the best tires for it. if you cast this tire in hard resin so you could remove the writing on the sidewall then cast that version, it might interest some of circle track racers that might want to change the brand of tire for their use.
Lownslow Posted March 12, 2012 Author Posted March 12, 2012 something else im working on the tires arent part of the whats coming lol i dont wanna cast any stretch walls till i get the right dye they will be two piece wheels
Greg Wann Posted March 12, 2012 Posted March 12, 2012 (edited) Here are some tires I made using the Polytek Flex 50. A very nice product indeed. Here is the mold, not much to say about it except the cured tires put me in a sweat wrestling them out of their pockets. Thanks for the tip, ryan. Greg Edited March 12, 2012 by Greg Wann
Chuck Most Posted March 12, 2012 Posted March 12, 2012 Casey, compare your MRC M/Ts to the real ones and you'll see why they're not the best choice. The various words on the MRC sidewall are placed so haphazardly, it almost looks random. That might be OK if you don't paint the letters, but most guys who ran performance tires wanted the white letters showing. That and they're awfully chunky-looking, at least to my eye. Best thing about those MRC hop up sets are the wheels... and those ever-useful adapters.
shucky Posted March 12, 2012 Posted March 12, 2012 Greg thats a funky mold. Can you share how you made it that way? I dont see any mold lines or pour/vent holes? Looks like you made a mold of the inside of the tire and then a mold of the entire tire encased in silicone? Curious to hear how you did it. Thanks.
Lownslow Posted March 12, 2012 Author Posted March 12, 2012 Greg thats a funky mold. Can you share how you made it that way? I dont see any mold lines or pour/vent holes? Looks like you made a mold of the inside of the tire and then a mold of the entire tire encased in silicone? Curious to hear how you did it. Thanks. seen that mold before but for hollow tires i plan on doing one soon
Lownslow Posted March 13, 2012 Author Posted March 13, 2012 i gotta fill a private order out first before i market these out they have a lot of give as you can see. they come in left and right 15 17 19 17-20" low pro these come in single direction only right thread
Greg Wann Posted March 13, 2012 Posted March 13, 2012 (edited) Greg thats a funky mold. Can you share how you made it that way? I dont see any mold lines or pour/vent holes? Looks like you made a mold of the inside of the tire and then a mold of the entire tire encased in silicone? Curious to hear how you did it. Thanks. http://smcbofphx.pro...lay&thread=1297 Take the above link over to a forum that I show a lot of my casting work on. You will want to go to page two for the tire mold making. Most of page one are pictures of a Mercedes W196 Race car being taken apart. The mold I make is pretty simple and straight forward. I would suggest that you buy some of the Kleen Klay I use to clay up parts. The best deal for that is from Allumilite. Kleen Klay is to Resin casting as The Force is to Star Wars!! "LUKE, USE THE CLAY, LUKE"! I do pretty much Encapsulate the entire tire in silicone. This mold will make some great tires when I have good resin to work with. As you will see when you go over to my light side of casting that when they put an expiration date on a can the stuff knows when to go bad!! YUP! These guys have expiration dates down to a science too. LOL The one thing about my mold is that the tires are not easy to remove. Be prepared for some excercise. Some of you guys making tires are just trying way too hard. So....Check out my work and cruise around our forum. You can see and join for free. We are the guys that bring the Desert Scale Classic Model Car contest to life at the good Ol" Postal Hall every year and it's coming up in April in the Phoenix, AZ area. I'm sure Danno will post a fler soon. Enjoy and have fun. It's not just a forum to waste time at. Hopefully you will learn something about resin casting. Well......It's my take on the subject. Greg Wann AKA Shartin Looms Edited March 13, 2012 by Greg Wann
shucky Posted March 13, 2012 Posted March 13, 2012 Greg, I've been experimenting with resin for about 2 years now and have done pretty well with it but tires have been hit or miss with me. Thanks for sharing that link. Very interesting stuff in there. And not to hijack Franks thread, your stuff looks really nice too. Tires are looking good. Very informative post on so many levels. Thanks guys.
Greg Wann Posted March 13, 2012 Posted March 13, 2012 OOPS! I too apologize for seemingly hijacking this thread. I am certainly not here to try to outdo anybody about this. I have been posting my resin work for some time now on our forum. Jeff Watlington the Time Machine Bandit guy was pretty helpful but a lot of what I show is what I dreamed up on my own. If I had a big Ego, I would say it was top secret and I would not post anything. Greg
Lownslow Posted March 18, 2012 Author Posted March 18, 2012 finally a 16" deep lip also casted some sweet brembos this was kinda rush casted thats why theyre so flawed
imatt88 Posted March 19, 2012 Posted March 19, 2012 I got my set of muscle car tires from Frank. They were cast in the tan resin, and they are really good. no air bubbles whatsoever A little cleanup, sanded off the pour stubs, cleaned up the relese agent, and voila, ready for primer and paint good stuff Cheers, Ian
Lownslow Posted March 19, 2012 Author Posted March 19, 2012 I got my set of muscle car tires from Frank. They were cast in the tan resin, and they are really good. no air bubbles whatsoever A little cleanup, sanded off the pour stubs, cleaned up the relese agent, and voila, ready for primer and paint good stuff Cheers, Ian glad you liked them i cant wait to cast them in rubber
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now