I believe there were some indy cars running v-6 Buicks some time back you might try to find their formula for success. You might even find one of those engines laying around for a reasonable price. Well almost reasonable. As mentioned you could also go for more torque and less rpm. The problem with that is the car would be harder to manage because of excessive wheel spin. Big torque engines have a tendency to over power the tires especially coming out of a corner. Bob H.
Nascar small blocks currently use a 3.25 stroke and 4.180 bore combination. Most crankshafts are in the 42 lb. range. The original Traco company is long gone, owners deceased and someone else has taken it upon themselves to "use" the original name, a bit of deception in many peoples opinion.
Is the same matching numbers car that you had for sale you are going to "mod"? http://www.v8buick.com/showthread.php?t=166102 Just curious, ElectraJim
I still don't get it. Maybe they used inferior materials in the BBB? Because it isn't the rod ratio, the BBB has a taller deck and longer rods which should mean less force against the bore or at least not more. It isn't the stroke, .050" more isn't enough to spit at. It isn't the crank, that has bigger journals all around, can't see it being the rods with the wide selection available, and all that leaves is the bore. Are you guys telling me that just having a bore of 4-5/16" makes a block brittle? Are they really that thin? Why is that? There's more room between the bores so it isn't for lack of space. Is it just because nobody's done it? Why haven't I heard of these broken bores? Jim
I will go out on a limb :laugh: and say that making a 1970 BBB turn 9400 rpm's is not possible (and live.) That is NASCAR motor territory. Those are the best pushrod race motors ever made. To try and make a stock 1970 motor do that is impossible.
Its not really the bore spacing,I've overbored 455's to .060,its the bottom of the block and for roller cams the lifter bore area.The bottom of the block only extends to the centerline of the crank,whereas the chevy and even small block buick extend past the crank.This is one reason a BBB weighs only 25# more than a SBC.The bottom moves around a lot and with 2 bolt mains the bearings fail and/or the block fails with high hp and rpms.Hence the need for girdles and cement fill. The lifter bore area is also weak for high spring pressures so rollers are out of the question without lfter girdles and still the guys hold their breath.my motors live because I tend to keep hp in the 600-700hp range and rpms 63-6500,which is good enough to put a 3300# car in the low10's high 9 area. gary
I wonder if the guy that started this thread is laughing his ass off at all of us gyrating back and forth about the possibility of a BBB turning 9400 RPM for an extended amount of time. I notice he has been pretty quiet since he got this started. Is April 1st here already? What part of thinwall cast block, cast crankshaft, heavy rods and pistons, weak lifter valley, etc. would lead you to believe that an iron BBB is even capable of turning 9400 RPM? Come on guys, we live in the real world....
Yep, and I think he had the car for sale in the cars for sale section. Which is why I asked a few posts back. If selling, why this thread?
Well for all that I agree with you guys, but it has been interesting. Since he's not here anymore, I'm going to recommend that he gets one of the new TA alloy blocks, fit it with a custom destroked billet crank, the best forged pistons and rods, roller cam and rockers, titanium valve parts and see if he can set a record. That's what I'm going to suggest. Then if he breaks it he can fix it.:laugh::moonu: Jim
If a 350 missing two cylinders under boost can do all that a 300 minus two cylinders. the only thing more '350' about the 231 is the the bore diameter. that's why the major v6 production before 76 was 225 = 6/8 * 300 Yet the stroke of the 455 is only .050" more than the 350!!??? A bigger beefier crank and a bigger beefier block Jim, you are correct about the 455 crank but incorrect about the 455 block. in fact, the weakness of the 455 block is the primary reason for those big mains on the crank. I still don't get it. the main bearing webs are too flimsy. do some searching on "bearing failures" in the race 455 section. 2 bolt mains don't help. this will not be an issue with the new TA block. Yeah, he hasnt logged on since the day he started this thread. doesn't mean he hasn't looked at it. about the possibility of a BBB turning 9400 RPM for an extended amount of time. he did NOT suggest that. he asked about the viability of a Buick v6 turbo at those rpms.
Either way, he isn't going to get ANY Buick engine built before GM went "corporate" to run 9400 RPM's for long, V8 or V6. He could play with a Nascar V8 "Chevy, Dodge, Ford, or Toyota" engine if he has the price of admission, and they can last 500+ miles running between 2000 and 9300 RPM. I think if he is really looking for something different, then an "original" 70 GSX Stage 1 turned SCCA racer with bulging fender flares and a Joe Gibbs Toyota Nascar motor would certainly do the job. You don't have to be popular to be fast. Kyle Busch certainly proved that. OK,OK, don't blow a gasket! I was just kidding....
That's, of-course, After he wins the lottery! While we're sorta benchracin road courses... seems like a CVCT trans might has some merit. You know-never blow a shift, chassis stay's "loaded during ratio change", never the wrong ratios? Yes it would be, "shiftless", but.........? roverman.
heh, roverman resurrects a thread! Either way, he isn't going to get ANY Buick engine built before GM went "corporate" to run 9400 RPM's for long, V8 or V6. the Nailhead guys disagree. there's somebody running around here saying that they were using an Iskanderian Ultra-rev kit on a 322, turning +9000rpm at the big end every time down the 1/4 in the early 60s. sounds like fun.
Yeah ive been thinking of a rev limit for my new block............ I think the heads and cam will determine that though. Still be nice to know that if I do over rev it, it will stay together, as long as everything else is good. I dont have much confidence in the '76 block hence the investment. Royden
