That's 100% correct. When you bore the cyllinders, the walls obviously become thinner, but this also takes away structural support for compression to take place. 425 Blocks are even more prone to this. If you have ever looked at what sonic testing tells you, this becomes apparent how close to the watter passages a 30 over bore (or more) will put you. Under high stress and compression, the walls can flex, egg shape or even worse rupture, but mostly this will represent itself as piston ring seal issues. The "hard block" just helps add back structure to the bore. Today's Moly rings also help. This process is probably not necissary for your every day driver, but could make the difference of when your tired 'ol nailhead starts to smoke and is ready to be rebuilt again. On a point of clarity- The "hard block" I used is an Epoxy based backing resin. This is used in the industrial world for filler, grouting, floating footings and such. I purchased the stuff from my place of employment as we use it for installing "grouting in" if you will, manganese wear liners in roller bearing rock crushing cones. It is made by several manufactures- Dupont and Loctite and Fel-Pro are a few that come to mind. It's known in the trade as Nordback, Hardback or Strongback. It is lighter than cement and has a coefficient of expansion that is closer to that of steel. Having that stuff come loose in your water passages would not be pretty!ou: Full drag racing engines do not have a cooling system at all. The water passages are filled completely full with "hard block" for extreme cyllinder support and overall block rigidity. Now Tom... Where are those gold plated Rockers?!?!? :bla: Erik
As I replied earlier. I received your personal check in late Friday's mail, 5-25-07. Because of the holiday I wasn't able to deposit such check until Tuesday, 5-29-07. As soon as I have confirmation that it has cleared I will inform you & the "Rockers" will be shipped that day. I'm pretty sure we discussed the fastest way for shipment would be a Postal Money Order & that I would have to wait for a check to clear beforehand. I was told I should have an answer on the clearing by Monday the 6th. of June. Is Gary ready yet?? I would imagine if I shipped them the 6th. or 7th. you would have them by weeks end. They are ready & set to go as of 5 weeks ago. Tom
Yes Tom, All right... you did say all of that. Didn't mean to muddy your good name! I was just ribbing ya' some more! Besides, I'm just getting anxious. Thanks Tom. Erik
Hey Tom, Is this meant for me? I thought my $ cleared over a month ago, and was just waitin' for them to come in. Please let me know what's up?.....No worries....I hope....:TU:
Any info on the Weiand 2 X 4 bbl intake on the 425? I've been running one for about 26 years. Was ok with the original Carters, but much much improved with 2 500 cfm Edlebrocks Roger:Comp:
I don't have a plan to put a Weiand in the lineup for the test. I believe that information is out there already. I don't want to test a Weiand for the same reason I'm not testing an Offenhauser. The purpose is to hold Eelco's feet to the fire with the claims of their 2x4 being better than anything else out there. I have also heard Weiands are also nice, but it is broadly believed-and dare I say, "established", that the Edelbrock B262 has been the best one of the lot of them based on testimonials and dyno testing of many for a while. As an update- Toms Roller-tip rockers are in. Thanks Tom! The block is waiting on a new flexplate for ballencing, then off to the assembly room! Still waiting on the valves to come back from Manley, but should be back any time.
you having a new flexplate built?... on another note, i just left correspondence with your builder about building another, this time low compression for boost:Brow: wes
http://i166.photobucket.com/albums/u91/66gsconv/Pic529.jpg I got my fathers day present on friday. I thought this was the right place to show a few pictures. Erik was right , it is a nice looking intake. Bob
http://i166.photobucket.com/albums/u91/66gsconv/Pic519.jpg some reason I could only send 1 picture at a time. Bob
Hi Bob, nice piece you got there. I want to place this post here because it's pertinent to the photos! I "see" this hundreds of times in "shots" up here on the web. Please don't take this as a "poke" at your work ethics! When you're working around the vehicle, don't care what it's about, you should never leave the carbs "uncovered" like the photo's show. You have no idea with me doing engines for over 40 years now, how many times we've opened a unit and had a nut, bolt, screw, etc. jammed into the pistons'. I can't count/remember the all the times now. Occasionally you never know anything dropped/or was placed in there until after "fire-up" and the "catastrophe" is over. I've actually had one or two done on purpose! Without the owner ever aware of the debris. I would also "cover" the spark plug holes. (Important) If this was all done only during the "photo-op", then take these as "tips" for the future! Thanks, Gary in N.Y. P.S. One other recommendation we make here is "never under any circumstances fire the unit with open headers", you will never be able to "hear" a problem. Double P.S. I've always been kind of partial to the "Nailheads" ever since I had the one below in the photo! 1965 Gran-Sport, 4 speed, 2x4's, 4:33 posi, and a "coupe" to boot! Loved it!
i wonder what it would be like with dual quadrajets? that is, IF they had designed the intake to accept quadrajets :rant: o No:
Hi Gary, Yes the heads are taped up and that was set up for a photo op.Nothing was bolted down. BUT you did catch me with the plugs out for a week. I was going to clean them up a little, some paint on them. I guess I should get on that. Thanks for the tips though. I will always take some one elses opion that does this stuff for a liveing. Bob
I see that the Eelco manifold has a similar design flaw as does the B262-the 'flange' where the front carb sits has very little arear in the center of the front. This is underneath the idle air passage on stock AFB carbs. It may seal initially but in a short time, the gasket will 'sag' and allow a major vacuum leak most noticable at or just above idle. On my b262, i could actually hear a slight whistle and it took quite some time to find the source. Tom T. said he has run into this a few times as well. I chose to put steel plates between the carbs and manifold (although only the front carb is of concern, I did both to keep the heights similar). I think Tom said he has filled the passages in some applications. ALthough I am currently set up with factory carbs, meaning the front does not have an idle circuit for fuel or air, the base is the same as the primary carb and the passage is cast into the carb base, just not machined in the main body. This still creates the lean-vacuum leak condition. Other wise the intake looks nice, hopefully it will do everything it is said to do.
An FYI, this Eelco manifold has more sealing area than a B262. I'm sure one of the improvements. Tom T.
Hello Everyone, Glad to see this thread still has an ear. We did add a significant amount of gasket surface to carb bases. It has the same shape as the B262 for asthetics but is larger. The engine is in the final stages of assembly from what I understand so we are anxiously awaiting. I have had several reports back from customers with their own horsepower claims and all are very gratifying. Thanks for all the support and feedback. Another engine is being assembled here for dyno pulls in Portland so we will post both sets of results. In the meantime, heres the new 3x2!
