been looking into the 263r rotating assembly on their website. I want to build a 3" block at some point and found these kits for sale on EC's website. Is it all drop in or do i need to machine the piston to compensate for the 58mm stroke? I dont want that high of a compression ratio (10:1 is my target) and just want some general advice on this, if its a good idea, etc..
ec 263r... worth it for big power?
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I'm sure there will be some clearance issues. anytime you stick a 58 mm crank in a clone block, things are going to touch. i doubt that EC will do that for you and there will be more than likely have cam lobe clearance issues when getting into the 300 and higher lift cams. just make sure you buy the billet side cover. that will be your gusset plate that keeps block from moving around. 3inch bore in a tilly block is at its max and now the casting material is at its minimum for strength. i got a 263 coming for a friend that wants me to assy, we will see.
let me know. I was planning on doing clearancing because I know that you have to do that with these kinds of builds. i havent had to do it yeah because the most ive ever built out was with a mild cam (hot 265) and stock displacement
but yeah update me on how the build goes with what im looking to do, planning on putting a .310 cam and using gopowersports' stage 5 head with big valves
but yeah update me on how the build goes with what im looking to do, planning on putting a .310 cam and using gopowersports' stage 5 head with big valves
ec sells a copper gasket im pretty sure, ill have to get the head grooved for oring i assume
(edit) yep, found the gasket
https://www.eccarburetors.com/3-inch-copper-head-gasket-tillotson-block
(edit) yep, found the gasket
https://www.eccarburetors.com/3-inch-copper-head-gasket-tillotson-block
Have you looked into what CR you would be getting with all of that? Some of us make decisions on how to raise compression. With those parts you may need to make decisions on how to lower compression if you are looking for 10:1.
I hear EC Carbs has pretty good phone support. Ask those guys what CR you can expect with a big valve 22-cc head milled .065" and a .032" head gasket with the piston at zero deck.
I hear EC Carbs has pretty good phone support. Ask those guys what CR you can expect with a big valve 22-cc head milled .065" and a .032" head gasket with the piston at zero deck.
think you would be way better off with the EVO head from EC CARBS . head is on sale right now for $299 and you need to buy the springs,retainers,keepers separate and that will be another $50. this head will out flow that go power head all day and might be one of best casted heads on the market before you get into the billet heads..
with a .045 fiber style/steel fire ring you would be at 11.42 and a .032 copper 12.08
what every you do, don't try milling you head with a block of sandpaper...etc only the correct way with milling machine...etc. head needs to be flat or your done...lol make sure you buy a stud kit. stock heads bolts can sometimes stretch after time and after reusing them. if you decide to o-ring the head with the steel wire? then use the .032 copper head gasket with it annealed and with a very..very light coat of toyota sealer (103)
I'm going to just go with the .045 fiber/steel ring gasket. the engine will get torn down after 6 full racings. mainly to check the head/springs valves..etc and then get a new head gasket. only running gas and we only can get 110 octane so my friend will need to mix a small amount of ethanol free 91 to bring the octane down so it burns more efficient with only 11.42 compression. my engine i run 13.1 + with 110 and runs like a dream...lol
HERE IS MORE INFO ON THE EVO HEAD look at the bottom page for compression.
here is what a .045 fiber steel gasket looks like. when using this type of gasket i spray a light coat on both sides with a copper spray.
back to springs and the EVO head. the head is setup for .850 spring height. so be careful what springs you buy and install. just so much that goes into this motor to make real power and it can be real easy F-things up very quick. .310 dyno cam you were talking about with a 28mm mikuni carb. i would start with a 21 pilot and a 330 main and go up from there on main jet sizes. really don't like this tilly block with a 3inch bore with the kind of racing we do. block is at its max and is ready come unglued. i use a different block 10x times stronger top secret ...lol none of the top performance engine companys won't touch it because nothing will bolt up to it without mod's done to it (machine work) easy for me.
BIG BORE small block 290cc maybe i will get it done someday... lol top head bolts are way out.
with a .045 fiber style/steel fire ring you would be at 11.42 and a .032 copper 12.08
what every you do, don't try milling you head with a block of sandpaper...etc only the correct way with milling machine...etc. head needs to be flat or your done...lol make sure you buy a stud kit. stock heads bolts can sometimes stretch after time and after reusing them. if you decide to o-ring the head with the steel wire? then use the .032 copper head gasket with it annealed and with a very..very light coat of toyota sealer (103)
I'm going to just go with the .045 fiber/steel ring gasket. the engine will get torn down after 6 full racings. mainly to check the head/springs valves..etc and then get a new head gasket. only running gas and we only can get 110 octane so my friend will need to mix a small amount of ethanol free 91 to bring the octane down so it burns more efficient with only 11.42 compression. my engine i run 13.1 + with 110 and runs like a dream...lol
HERE IS MORE INFO ON THE EVO HEAD look at the bottom page for compression.
here is what a .045 fiber steel gasket looks like. when using this type of gasket i spray a light coat on both sides with a copper spray.
back to springs and the EVO head. the head is setup for .850 spring height. so be careful what springs you buy and install. just so much that goes into this motor to make real power and it can be real easy F-things up very quick. .310 dyno cam you were talking about with a 28mm mikuni carb. i would start with a 21 pilot and a 330 main and go up from there on main jet sizes. really don't like this tilly block with a 3inch bore with the kind of racing we do. block is at its max and is ready come unglued. i use a different block 10x times stronger top secret ...lol none of the top performance engine companys won't touch it because nothing will bolt up to it without mod's done to it (machine work) easy for me.
BIG BORE small block 290cc maybe i will get it done someday... lol top head bolts are way out.
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