Yes I saw the weld on the ex port, weird, I've gone higher on the ex then that on a 372 and haven't had any trouble, this last one I cut the squish allot more then .030.
It's not the exhaust I have a problem with. The transfer are my main concern since I really want to get the flat entrance and a smooth turn in the port. I've ground out the top of a stock jug without cutting the squish before. After building this NWP BB I think it would could come close to squeezing it in the stock casting but I'm afraid with the AM jug there is probably a lot of casting shift and you couldn't do it consistently.
The top of the exhaust port is welded on just for a sealing surface. I never ground outside the existing casting but I'm sure I'm really close.
Nice they both run pretty awesome.
Any particulars on the first one?
Maybe this will help with the exhaust shape question. The angle of the picture can be really deceiving.
And finally here is a video comparing the new 372 BB to my TN build off saw that has had a few updates since then and it has been broke in as I sent it to the build off with only 1/2 tank through it.
[video=youtube;Mnq_BAbOfNw]https://www.youtube.com/watch?v=Mnq_BAbOfNw[/video]
great thread! so did you machine the base in the end? interesting if u didnt. ben
Yes I did but I had to finish the cylinder before I could get the piston in the jug to check the squish.
Ahhh ok. how much did you take off? whats the squish now? and did you use a lathe? sorry for all the questions i'm just in the process of doing my first build myself on a 362 body, 372 P&C. ben
Ahhh ok. how much did you take off? whats the squish now? and did you use a lathe? sorry for all the questions i'm just in the process of doing my first build myself on a 362 body, 372 P&C. ben
If ya look real close, the uppers arent the same on an OEM 372 cylinder. Look in the back of the uppers where they transition from vertical to horizontal. One port kinda points up just a hair, and the other port points more across the top of the piston.
Now I can't remember which one points which way now though .
I see what you mean by flat transfer exit. I just started working on a BB395 and the trans roof is much flatter then a 372. Now ya got me curious about doing the same thing to a 372.
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