Fastassbanshee96 Posted June 9, 2013 Report Share Posted June 9, 2013 Where can I pick up a degree wheel for my motor? I need to degree it to have my domes cut. Quote Link to comment Share on other sites More sharing options...
sheerider11 Posted June 9, 2013 Report Share Posted June 9, 2013 I got mine on ebay Quote Link to comment Share on other sites More sharing options...
fappy'97 Posted June 9, 2013 Report Share Posted June 9, 2013 I'm pretty sure Wildcard has them. Quote Link to comment Share on other sites More sharing options...
Fastassbanshee96 Posted June 9, 2013 Author Report Share Posted June 9, 2013 I got mine on ebayWhat one did you get? Kinda new to all this stuff. Could you possibly post a link? Quote Link to comment Share on other sites More sharing options...
J-Madd Posted June 9, 2013 Report Share Posted June 9, 2013 You can print them and tape to cardboard. Just curious why you need that to cut the domes though. That would be a linear measurement. Quote Link to comment Share on other sites More sharing options...
Fastassbanshee96 Posted June 9, 2013 Author Report Share Posted June 9, 2013 You can print them and tape to cardboard. Just curious why you need that to cut the domes though. That would be a linear measurement. I need new domes cut for my motor cause those ones that came with it weren't right. I was just told that I need to degree the motor to have them cut..... What am I supposed to do to have them done? Quote Link to comment Share on other sites More sharing options...
J-Madd Posted June 9, 2013 Report Share Posted June 9, 2013 Is it just the squish? Check it with wrong domes then make adjustments from there. You can also get an idea by measuring the step in the dome, then the deck height (how far the piston is in or out of the hole.) For example if the piston is 0.020" out of the hole and you want a squish of 0.040", just order new domes with a 0.020" step. Quote Link to comment Share on other sites More sharing options...
Fastassbanshee96 Posted June 9, 2013 Author Report Share Posted June 9, 2013 I honestly don't know if its just squish or not. Believe the guy said that they were the wrong profile and wrong squish. I don't have a base gasket yet cause I was just going to get one when I got the domes not thinking that I'm going to have to measure with a gasket I place. What gasket would be ideal and what is the ideal squish? Quote Link to comment Share on other sites More sharing options...
J-Madd Posted June 9, 2013 Report Share Posted June 9, 2013 What motor? The base gasket is gonna affect port timing as well as squish. As far as the dome being the wrong profile, a degree wheel won't help you at all there either. There are too many variables to suggest an optimum squish. The combustion chamber volume, piston angle, dome angle, squish band length and angle, bore, all play a role in the MSV. For example, off the shelf Cub 421 domes usually do good with about 0.045". You can run them in the high 0.03x" though. Quote Link to comment Share on other sites More sharing options...
Fastassbanshee96 Posted June 10, 2013 Author Report Share Posted June 10, 2013 It's a 485 cheetah. I'll be using it for strictly 300' sand drags. As far as the degee wheel I was just told that that was what I had to do. So could I put it together without a base gasket and take what ever measurement are needed and just tell whoever I have cut them that there was no base? Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted June 10, 2013 Report Share Posted June 10, 2013 You could, but then the problem is that they would still only be estimating the step in the dome. Many different base gaskets are made of similar yet different materials that tend to squish down a little bit. So say a .020 base gasket might actually be .015/.016 after torquing it all down. I would bet that whoever told you to get a degree wheel is doing that so that you know when you are exactley at Top dead center.... Just my guess and I know it is definitely the most accurate way to do things. So, if it were me, I would buy 2 base gaskets. Torque the cylinder down to spec with a gasket in place and use your degree wheel to find TDC. Then use a dial indicator to find what your deck height is. Use the other base gasket when you do your final assembly. Quote Link to comment Share on other sites More sharing options...
possum Posted June 10, 2013 Report Share Posted June 10, 2013 For example if the piston is 0.020" out of the hole and you want a squish of 0.040", just order new domes with a 0.020" step. I think you miscalculated. That would be .000 squish. If the piston is .020 out the hole, you would need a .060 step to yield a .040 squish. Am I thinking right? Quote Link to comment Share on other sites More sharing options...
n2otoofast4u Posted June 10, 2013 Report Share Posted June 10, 2013 Yes, J knows that also, just going fast trying to give an example. Quote Link to comment Share on other sites More sharing options...
possum Posted June 10, 2013 Report Share Posted June 10, 2013 What i figured N20 just trying to clarify for anyone trying to calculate there own stuff. Quote Link to comment Share on other sites More sharing options...
Coupelx Posted June 10, 2013 Report Share Posted June 10, 2013 Timings come into play with designing a dome so why would the builder not want the specs? Im not even sure what j madd and trickedcarbine are talking about or why. Quote Link to comment Share on other sites More sharing options...
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