Ok, I don't really understand why you guys feel you need to have max cubic inches out of this new block. Bigger isn't always better, right? You've got the Chevys that are taking stroke out of their motors, short stroke big bore. So you guys build this motor ... 573ci what heads are you going to use on this? To make this work you would need something to flow 400+ cfm. There isn't anything out there like that yet. I don't see Mike parting with his heads on the Wagon any time soon. I could be wrong about this, but you have this huge motor and your heads are going to end up hurting you. So, what would be the point?
The key word here is yet! There was no need in the past to do a 400 plus cfm head, there was not a block to put them on. Now that there is a block, there will be heads to follow. Word has it there will be a set of billet heads , with water passages on the market in the near future. Flow numbers somewhere between 450 to 500 I beleive. SO you see, a guy can build a 573 now, then in the near future , step up to some way better heads and go faster again. The block is just the next stepping stone here. Jim Burek
I could have it all wrong here but there may also be some guys just wanting the max cubes so they can leave the motor a little on the mild side and still have big power. A nice pump gas stock looking beast in a daily driver that NEVER has to see the high side of 5,500 RPM!!!! Also, if forced induction is used, doesn't that "lessen" the need for the flow numbers of the head as the mixture is more or less being "crammed" in there? I'm not thinking good heads don't help with forced induction, just wondering if they are less important than with normally asperated?? I do know that would put even more demand on the exhaust side of things though. Ken
Put the best flowing biggest port heads we have available on a 573 and you should have a nice mild-mannered street engine for mom's Electra. TA supposedly has the answer on the drawing-board, we'll have to see what materialized in aluminum.
Is the 4.5 bore a one time deal; the absolute maximum you can go? What happens when the cylinder walls start to wear? Overbore or sleeve? I'm wondering how thick the walls have to remain with a 4.4 or 4.5 stoked crank sitting in there.
I like that 560" idea with a 6.800 rod and 4.400 crank. If I was doing another engine, that's exactly what I would do. JH
Rod would need the better heads like the rest if he was to go that big. Whatever air he is forcing in he has to get out. He would need it on the exhaust side of it. Great if there is going to be a set of heads out there for guys who want to do these big motors. I find it hard to believe that it will be that easy to whip out a head that will flow 400+ cfm. The top dogs in Chevy have huge money invested in theirs to flow near 500. If it was that easy they would of had them 15 years ago. The demand is way higher for them than it is in the Buick world. Then again with the knowledge we have now, maybe it is possible. Still doesnt explain why the block needs to be maxed. The blocks now can make the power, just need the oil mods and stronger. We have both of them with this new block. You can only freshen a block so many times. So if your starting out maxed out it doesnt leave you much to work with. Being that these are high end blocks to begin with. I would want to get the most use out of them as I could. To each their own, I was just wondering why everyone wanted to go so big.
I would agree with that. No reason to take it all the way out- more power than you can use can be made with 500 cu. in. definitely with a power adder. The bulldog stage 1 heads are flowing 390 on the intake, aren't they? I'm of the opinion that a big bore is good because you have less valve shrouding and flow restriction. I would go with a shorter stroke to make it turn a little faster. Making this kind of power will demand RPM at the top end of the 1/4 with the times you'll be turning. ________ HAWAII DISPENSARY
I'd like to put a 573 in a chebby :Brow: but I don't like chebbies. ou: Show those guys what a real motor can do! :bglasses:
Not everybody wants a 8-71 poking out the hood (Don't include me in that group). Danie' how long have you been around men? Bigger is ALWAYS better. :Smarty:
Mom's electra? that's the look i'm hoping to get when my 225 is tearing the streets up. then the only look anyone else wil get is at it's fat ass :laugh:
How about a 573 inch Buick in a 67 rivy sporting dual quads on pump gas? Already in the works here. He wants to eat up mustangs and whatever in a boat. Jim Burek
that's what i'm talkin' about! i'm going for 11's, but i don't want to tub anything, so we'll see.....a 120 trap would be cool.......but it's definetly gonna see mostly street time maybe just a few runs at the track to see what it can do, and hopefully eat up my camaro!
Oh, GOOD ONE!! :laugh: Rod/Danie, I believe T/A's new Stage2 T/E heads would fit the bill pretty nicely for me, although I don't know what cfm they can be maxxed out to. If Bulldog does come out with a killer head, I'd have to look that direction. Keep in mind, it's not all about cfm. Velocity is at least as important as cfm. My heads are perfect examples of that fact.
There is still plenty of room at 4.5 inches on the bore. Jim Burek :jd: oooooooo-kay. so what do you think will be the true maximum 'overbore' and what kind of wall thickness will that have? is that info going to be in the weekend update? :Brow:
