Re: Snapey's 1935 Racing Biposto

Posted by Matt snape On 2011/6/22 7:47:41

Yes, of course, the T-head. You must forgive me but it has been one of those days...

As you say it is not a design that can provide decent compression ratios and when you think about it, as soon as you start to try to create additional valve lift or increase the size of the inletting in the head to improve gas flow, the situation will become even worse.

I am facing the very same quandry with the 282 motor. With what are relativly small valves (and without much room to increase their diameter) it means that to improve flow I will need to increase the valve lift. Also with the valves so closely spaced increasing the overlap could also become a problem. Luckily I have access to many years of 'research' via my family and it is a problem that I will very happily hoist off onto my father and/or brother. They are better at this sort of thing than I am and if it all turns pear shaped I will have someone else to blame... althought the chances of either one of them copping to that are pretty slim.

Anyway, as previously discussed I will be trying to create a new 2 piece head modelled on the very effective 2 piece unit that we currently use on one of our Willys engined specials - the one that I normally drive in competition (photos of which you will find here -http://clubs.hemmings.com/clubsites/wocv/willywilly/willyrac_07.htm ). I figure this will be pretty simple - just double a straight 4 cylinder design to get a straight 8 head... easy...

Actually it is easier than you might think, especially given that this is the sort of thing that I am actually good at. Well, I assume there is a reason that people are willing to pay me to do this sort of thing - and I'm pretty certain that it is not because of my stunning good looks... ROFLMAO!