|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
03-07-2022, 08:52 PM | #21 |
Senior Member
Join Date: May 2010
Location: NJ
Posts: 6,179
|
Re: Reasonable cost (NOT cheap) street flathead engine.
|
03-08-2022, 01:52 AM | #22 |
Senior Member
Join Date: May 2010
Location: Wa.
Posts: 5,408
|
Re: Reasonable cost (NOT cheap) street flathead engine.
|
Sponsored Links (Register now to hide all advertisements) |
|
03-08-2022, 09:10 AM | #23 | |
Senior Member
Join Date: Jan 2011
Location: Central Ohio
Posts: 5,064
|
Re: Reasonable cost (NOT cheap) street flathead engine.
Quote:
1) The dry sump is something that is combined with low-tension total-seal or metric rings. The goal is to reduce reciprocating friction and overall "oil drag" in the lower-end. You need enough "stages" in the pump to really pull oil and create a vacuum inside the engine. 2) On a full-on racing engine, some may add a vacuum pump as well. Obviously in order to run a dry-sump setup, you also have to have a dry-sump reservoir. The combination of a correctly designed dry-sump setup, low tension rings, oil scrapers, windage tray, etc.. - results in the important extra horsepower Pete was talking about --> I believe he referenced 40. That is a LOT in a flathead - so you can see the value in all of this. 3) On filling the heads, I believe what he is talking about is to fill/remove the dome and run a flat-top piston with a tight quench. In days past, one could get some of the head manufacturers to deliver heads without any of the dome work done - so you could do what you want --> run a flattop, run a pop-up flat-top, etc.. Not sure if one can get anybody to do this today, but it beats having to TIG weld the heck out of a "normal" head to get there. |
|
|
|
Sponsored Links (Register now to hide all advertisements) |
|