Here is the deal...I am in the planning stages of my next build. Which will be a Chopped Tall T Coupe with a Bad ASS Y-block in it for street and Strip use. 9" ford rear, T5 trans, ladder bar rear susepension. You may be asking your self why build a why block, there expensive, size is limited, and so are parts...I say this Why Not build it..Its what I want and thats all that matters to me. I have started making my parts list for The Y-block. I currently have 2 Y-blocks available to build. a 292 and a 312. One of them will get turned into a stroker motor. I know John Mummert makes a stroker kit but I do Not want to buy the kit. I want to have my crank machined and hand pick all my parts. I know on the 292 I can have the crank offset ground down to 1.888 and get some chvy rods 6.300 and pistons with a 3.875" bore and Ill end up with a 338" Y-block. If I did the same to the 312 crank Im not sure what final c.i.d I would get, and I dont know what lenght of rod I would need...Im hoping you guys can help me with the math on this one..lol I know with the stroker portion I will have to have the rods machined down to fit the narrow Y-block journal or would it be possible to have the journal widened slightly during the machineing process? Now here is the part you guys come in on...I want you guys to help me plan out the best Y-block combo. below are the parts I am currently planning on..anything else is up for debate. I am also planning on running a supercharger for this engine. Mummert Aluminum Heads Forged Piston 8:1 dish Supercharger (Mcculloch, 4-71 on a machined blue thunder intake, or twin turbo) John Mummert cam: grind to be decided High ratio rockers True roller timing chain Aluminium flywheel Give me your honest opinion on engine and parts combo. I really want to build the baddest semi streetable Y-block I can. Ive already got the machine work priced to have my crank offset ground. Im looking at somewhere between 400 and 500. I do want to do this for the cheapest I can..but I will not sacrifice quality for the sake of saving a few bucks.
for traditional looks, the McCulloch. For performance twin turbos. Or you can be supremely bad ass and run dual McCullochs like the Dick Patterson model A coupe http://www.jalopyjournal.com/forum/showthread.php?t=58956
My suggestion, why bother with a stroker. Go with forged pistons, better rod bolts and the good factory head. Having that long block with a 4-71 is going to give you well over 400 lb ft. Right down low. I don't know how much more you can have and still hook it up. I have been down the if a little is good more is better avenue. You will spend 70% of your money getting that last 15% of your horsepower. Respectfully maybe you have gobs of money to throw at your car.....don't forget the rest of your driveline too, believe me the blower will destroy every weak link! Good luck! By the way.....you should not even utter cheapest and baddest in the same sentence.........ain't gonna happen!
I use the word cheap loosely..I would never cut a corner or invest in a cheaper part for the sake of saving a few bucks. But that doesn't mean I dont know how to bargin shop...I will hit up all the speed shops, racers, swap meets, machine shops and personal staches I know of trying to find the best deal on quality part to cut cost.
The 312 will get the most for the least up front cash. You can turn down a 312 crank with an offset grind and put it in a late 292, which is a stronger block. The weak part with any of those blowers will be the T5. A T5 wont be reliable with the torque of a Y block. I like the turbo set up myself.
I think I would agree with this. If you are gonna "stuff" it get a good early '60s truck engine with a steel crank, spend a little money on pistons and good rods then boost it about 7 lbs and you should have good reliable power. Certainly more than enough for the street. And Don I will have to disagree with you about the T-5. I'm running two of them and they hold up quite well. I wouldn't say you can abuse them every day but I hit them hard once in a while and they can take it. This one in my '58 is even a four cylinder model. <iframe width="420" height="315" src="http://www.youtube.com/embed/28gtzOJdHqg" frameborder="0" allowfullscreen></iframe>
Thanks for the advice...It gives me something to thing about...and with the aluminum heads added to the combo it should be a very healthy motor.
We built a 325ci Y Block that we gave away at the Symco Shakedown this year. Offset ground a 292 crank, used some donor rods from a different motor and off the shelf small block chevy pistons. Took a LOT out of the block. It was a nice setup and not much more than building a stock 292.
There's an old thread here on the HAMB about building a stroker Y-Block using off the shelf pistons and rods, I'll see if I can find it. I found the old thread but its not about building a stroker, its about Y-Block pistons. I couldn't figure out how to ad a link but here's the title; 292 y-block pistons: a strange idea
I honestly can't tell you much about the Y-block, but I think the 4-71 may be to small if you're going to try an get serious horsepower at any revs. With a 6-71 the blower won't have to spin as fast to push an equal amount of air, and it will therefore be able to keep up at higher revs, and run cooler than a smaller blower. I've never really liked the way a turbo setup looks, but it's a lot more efficient if you want to go past 0,7 bar (10psi) Just my 2 cents
Slight change of plans on this engine build. Im going to build a lakes style car with a twist. I will be running a VS57 McCulloch supercharger and a Marine interceptor intake. I have already had the air tube made that will connect the 2 side draft carbs to the supercharger. It only needs the T section made to run to the supercharger. The carbs on the interceptor intake are the same ones used on the turbo corvairs so I know they will work being pressurized. I will be building 312 out of a 57 ford. As of right now i plan on swapping in a set of forged pistons (probably 30 over), I beam connecting rods. True roller timing chain. What cam would you guys recommend for this combination? Do you think i would be better off building the orginal 312 heads or investing in a set of the murmmets aluminum heads?
How about build a solid 292/312 with some ported G heads, cam and intake? I bet you would be more than impressed in that T especialy having a T5 behind that Y block. As far as boost goes I say twin turbos. You can use 2 small ones that spool up fast for tons of down low boost but also have enough to handle the top end. Also you can use an intercooler and thats fairly easy to add later. But the drawbacks of using turbos is carburetors. So if you dont want to run a special carb or efi then maybe twins are not for you. If you want simple old school then a roots blower with carbs on top may be the best. But my opinion for all out motor is efi twin turbo.
You better forget the 312 crank..They are iron. Go with the 292 truck crank. They are steel. It takes a bit of machine work but they will work.
I didnt realize that until i took a closer look at the pics. But i will not be pushing a lot of boost thru them so they should be fine.
You may be asking your self why build a why block? No. I was asking myself why a stroker? Multiplies the cost. Does not change the power , Just lowers the RPM when it occurrs(when the heads give up trying to feed the cubes.) Don
Thats why I said stick with a 292 or 312. The only reason to build a stroker is to run in a certain cubic inch class. IMHO
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