Another interesting auction on ebay if anyone is interested. cgi.ebay.com/ebaymotors/1965-Buick-Nailhead-4-71-GMC-Supercharged-425_W0QQcmdZViewItemQQcategoryZ140684QQihZ024QQitemZ370038589816QQrdZ1QQsspagenameZWDVW
This is true. The engine had about 140PSI cranking. Which is about 9-9.25:1 mechanical compression. We ended up with some problems with the 2 4bbl carbs we had (which is now aleviated) Stay tuned! Mike
I've been more of a watcher on this thread, but boy the anticipation is getting painful! :bglasses: Must be that much more for you!!!! Looks like your getting close, can't wait to see results and numbers (like everyone else)!ray:
Another interesting offering from ebay while we wait. What do you guys think of this. cgi.ebay.com/ebaymotors/2x2-buick-nailhead-intake-4x2-3x2-6x2-u-fab-401-425_W0QQcmdZViewItemQQcategoryZ34203QQihZ010QQitemZ200214539161QQrdZ1QQsspagenameZWDVW
I dont think Buick will have data on a single 4 with a big carb like a 950 or a 1050 cfms. It would be intresting..........
uh huh. I know what your angle is Doc.:Smarty: I might be interested if there were a decent flowing single 4 intake worth testing, but that's not what my testing is about. BTW... I almost have my hands on a Weiand 2x4 to throw in the mix. Should be here in a day or two thanks to Russ Martin at Centerville Auto Repair! You know... we might all be surprised and have been wrong all along about our assumptions of what intake is better all along.ou: ... and Doc you might right too ...if we were testing single 4 intakes too... Erik
Erik, pard, I am just dreaming, I would be real intrested in the stock 4 that has been hogged out between the primary and secondary bores with the 1050 3bbl that I am currently using. I figure that it does better than most guys think. say, better than 3/2s or even some 2x4 set ups. right now there is no single 4 speed equipment manifolds for the nails so the hogged out stocker is the best we have. If eelco will ever get off thier butt and make one I will be in line to buy because at the least it will be lighter.
I agree, it would be nice to know how a standard 4 bbl/carb compares to a 2x4 setup. That's what most Nailheads are using. Would make a good baseline for comparison, especially if a stock AFB was used. Doc, data provided by Greg Gessler gives a avg flow of 222cfm for a stock Q-jet intake, and 252cfm ported. A 2x4 was 252 stock and 282 cfm ported. One was thru a carb, the 2x4 was thru 'clay inlet radiuses' How about it Erik, can you test a stock 4 bbl for us?
I do have a couple stock single 4 intakes and an original AFB, but it needs overhauled. If someone has an intake and a carb set up already, I might be inclined. It's easy enough to swap out intakes on the dyno. Who wants to pull their functioning intake and carbs off for testing? Probably not many or nobody. ... so many claims, so little time and money...(not to take away from those generous souls that have contributed to the dyno fund already!) Erik
Now if we only had one of the bolt on EFI setups that some of those other brand motors have available. That what's in my dreams for induction.
Yeah, and a Blower, and nitrous system, and a. . . < THUD!> Did y'all hear that?? It was Erik hitting the floor after passing out-poor dude is exhausted from this dyno thing. :bla:
When we did the engine dyno testing on Bob's engine some of the things we tested were intake/carb. combos as well as many different spark plug changes. Only thing I can say is that the Q-Jet (850) held the usable HP & Torque RPM's for less RPM's than either the single 4 with a Holley/750 dbl. pumper (but made about 5HP more & no more torque) or the 2x4 with 750 Edlebrocks. If memory serves me correctly the Q-Jet had a usable RPM range of 700-800 RPM's. The 1x4 with Holley held it for 1300-1400 RPM's. The 2x4 held the usable HP & Torque for 1500-1600 RPM's. Way back when the Q-Jet manifold & carb. combo made more noticeable difference because the carb. size went from (at the time) a 625 AFB to a 750 Q-Jet. Then for more power some added an 850 or 1000 CFM Thermo-Quad. Small intake plenum's like bigger carbs. & larger plenum's like smaller carbs. Just my observations. Tom T.
Ready to fire! Unfortunately I will be out of town for most of the week. We are scheduled to make the break in run on Friday. I would like to thank everybody for thier patience. I know this had been a long tie coming. Erik
Sorry for the long delay all. Been SWAMPED! Here are the dyno sheets some have all wanted. any questions, just ask. Mike:3gears:
