redline RPM for buick 340
I have recently acquired a complete 73k mi Buick wildcat 375 340ci 4bbl motor in a "pulling" tractor (1947 farmall M) and have replaced the bearings and checked it out. what is a good redline to shift at stock? after installation of headers and a 230deg at .050 or so hyd cam and springs?(will be using MSD triggered form the points dist, to retain the vacuum advance and a full manual kit in the super turbine 400 and manual pitch control) what chip would you put in the MSD for rev limit? not worried about getting max power (exhibition pulls only, no added weight) I want the thing to sound cool and live a long time because it is such a unique and rare engine. thanks!
Redline RPM for Buick 340
Quote:
Originally Posted by
Modernfuse
1155, thanks for the useful information here as I have been on the same train of thought in using the flat tappets still. I noticed that Mobil1 still has 1300 ppm of zinc in their 15W-50 oils which has worked good until winter time here. You seem like trial by fire has been had a few times, may I pick your brain and see what you their stuff?
Hi Modernfuse
Ask anything you like. I am not sure what you mean by "See what you their stuff" means. Please clarify. We have found in a winter where the temps got at zero or just above that a non-synthetic oil with 15W at the low rating was too thick; we got oil starvation while cold and hurt a couple of motor's rod bearings, one 318 Mopar and a Jeep 4.0 High Output. We can hear one or more rod bearings making a slight noise at start-up when changing oil that goes away as soon as pressure comes up. We now go with 10W non-synthetic at the low end and have not had the problem again.
Back to our 340; we have drilled out the oil passage in the block to 1/2" and will be using the TA Performance larger pick-up tube. We are also modifying the passages in the front cover along with one of their oil pump renewal kits and an adjustable oil pressure pump relief valve kit. I highly recommend that company; you will talk to ladies that are extremely well versed in all parts they have and have good suggestions. They know part numbers by heart. Refreshing in a world where now if it all does not fall in line on a computer a 'parts counter person' cannot help you from experience. We have multiple GMC V-6 truck motors here, probably over 20 from the late '60's and early 70's. We love them because of their high torque. They run in CI from 305 to 478 CI in the same block configuration envelope size. We had a counter guy tell us there was not a V-6 block made he could not carry across the shop. I clued him in on his misunderstanding! You would have to be a serious body builder to carry one of these truck V-6 blocks! I have adapted a 478 CI V6 into a Massey Ferguson 1100 farm tractor. This is the parts guy that then told me that motor did not exist! He then made the further mistake of telling me there was no such thing as a Unipoint set for the big diameter GM window distributor. The Unipoint set (Delco D-1007) has the condenser attached to the point set which makes installation quicker. While this was going on I looked past him to a rack of ignition parts behind him. I told him "OK, just turn around and give me that point set, third row up from the bottom, center". Guess what; it was the Unipoint set!
This is Martin, Dan's dad. Dan is the one normally responding but I have responded here. I am 72 and have worked much like he has all my life both as a professional mechanic, now as a side-line in our farm shop while working my full-time job as a design engineer. This is a great site! Keep ip the good works!