you need to re-read my #9 post. its all about the combination. leave out one ingredient and your motor will not perform well at all.
This, "excellent flowing heads" is very true I built a 292 cube W Ford for a project of mine with 200cc heads a large head for the little motor, you would think a 175 is what would work. A 248 @ .050 street cam and 600 dp, 445 tq 455 hp. There plenty of big blocks that can't post those numbers.Here’s food for thought......
The Craftsman NASCAR truck series limited the engines to a 9.0-1 static compression ratio and a small carb that still made over 700 HP.
The big secret besides the camshaft used was;
“Super excellent flowing heads!”
I agree. And want to reiterate the point that availability of E-85 in the midwest (corn country.) Is decent. May not be true everywhere around the country. And on a final note. Exhaust will smell different. I think it smells a little like french fries mixed with petro. And fuel efficiency certainly falls. I'm not sure how much at WOT. But could be as high as 40%. You get less BTU of energy from alcohol than gas. But you can compress alcohol alot farther before auto detention.Very good point on the e85... I'd put e85 and 12.5 SCR roughly on par with 93 gas and 10 SCR.
The e85 idea ought to tempered with the OP's availability. Not as hard to find around bigger cities, along interstates and in the cornbelt. Not the case here, I have 1 station within a 30 mile radius and 5 stations within a 70 mile radius. It goes to 0 stations if you head west into the mountains of VA and WV. And in the Rockies, it is 100-200 between stations in most areas. Not a good choice for a higher consumption rate fuel and a not-great-fuel-mileage engine to start with.
I dunno exactly where in OH the OP lives to see; in the southern part of OH, e85 availability looks darned poor.
Best answer yet! A set of lightweight pistons and a longer stroke crank (3.58-3.79 with J heads) makes a whole lot more sense and will live a whole lot longer. It will also do it without making you have to grab your ankles and smile in maintenance and fuel costs. The overkill street builds are fun for a while but are pretty useless as any kind of driver. It will grow old quickly and you’ll be looking to detune it to make more of a driver out of it. Seen it many times.Sell these pistons to somebody building a drag race engine and buy the proper ones for your needs.
Best answer yet! A set of lightweight pistons and a longer stroke crank (3.58-3.79 with J heads) makes a whole lot more sense and will live a whole lot longer. It will also do it without making you have to grab your ankles and smile in maintenance and fuel costs. The overkill street builds are fun for a while but are pretty useless as any kind of driver. It will grow old quickly and you’ll be looking to detune it to make more of a driver out of it. Seen it many times.
Best answer yet! A set of lightweight pistons and a longer stroke crank (3.58-3.79 with J heads) makes a whole lot more sense and will live a whole lot longer. It will also do it without making you have to grab your ankles and smile in maintenance and fuel costs. The overkill street builds are fun for a while but are pretty useless as any kind of driver. It will grow old quickly and you’ll be looking to detune it to make more of a driver out of it. Seen it many times.
Best answer yet! A set of lightweight pistons and a longer stroke crank (3.58-3.79 with J heads) makes a whole lot more sense and will live a whole lot longer. It will also do it without making you have to grab your ankles and smile in maintenance and fuel costs. The overkill street builds are fun for a while but are pretty useless as any kind of driver. It will grow old quickly and you’ll be looking to detune it to make more of a driver out of it. Seen it many times.
Well, no argument about those pistons for an all out race engine. But most people tire of a 13 to 1 all out race engine on the street fairly quickly. However, I'm not saying I wouldn't enjoy this kind of a build way too much myself! When the fuel is race gas or your burning 40 percent plus more e85 than you would gasoline, things become costly quickly, hence a pump gas build is cheaper to operate long term. I mentioned maintenance but I was thinking more of breakage. But if you get the domes milled for a reasonable compression ratio and maintain quench, nothing wrong with them in a street build if they measure out okay.
How much would it cost to have the pistons cut down?
The OP didn't want a Stroker. You guys can spend money for nothing right quick.
Bob weight is overrated. By a long ways. He can get a different piston, but it will be hell to get quench. I'd have to pull my bob weight card, but I don't think my Pistons were anywhere near 850 grams.
The point is...the OP has the Pistons. There is nothing wrong with them. In fact, I can make the argument that he may be going backwards buying a newer piston. Especially if that new piston isn't designed to come out of the deck.
Old doesn't mean bad. New doesn't mean good.
Outside the box is where money goes to die!
I agree with yellow rose. I have a set of those Pistons from years ago. I had mine cut for a little extra valve clearance, but as assembled on a typical 68-70 cc head they only actually came out to 10.9:1 compression. I believe those Pistons were advertised as 13:1I don't think anyone told the OP to use them as 13:1 Pistons. I'm saying use them as 11:1 Pistons. Done correctly, he can do that on pump gas, get .040 quench and have a very low dome. Then the piston will be lighter, he won't be through the roof on compression and he can use what he has.
BTW, to get 13:1 out of those Pistons isn't easy. They still have to be out of the deck .040-.050 to do it.
Can't tell you how many engines came through the shop that were some claimed compression ratio and when it came apart, it wasn't even close.
Especially the MoPar stuff with open chamber heads and a zero deck. Even with the piston out .017 like some books call for, you are nowhere near the claimed CR.
my last post guaranteed, yeaaaaaa!!!!!!!!!!
money for nothing and the chicks for free. any money spent on the combination of his current direction is a waste.
the idea for a stroker crank is a light piston with a reduced pin height. bob weight is NOT overrated. ok I exaggerated a bit there on piston weight but they are heavy.
hell to get quench? with those j heads for sure. like I said GET RID OF THEM duh.
and while old school is cool and nostalgic, new technology wins races at the track and on the street. it produces more enjoyable power on the street and new cars are proof of that.