single port drag race motor

[spencerfvee]

update i am shocked that there are a lot of guys out there building single port motors and all the guys that posted pictures of how they ported there heads and the great info every one has offerd ..if any one has pictures of there motors please post them i am realy getting into the single port thing its does not cost a lot of money and it works great . any one that has pictures of differnt carb set ups for single port heads post them many thanks to every one who posted this is what sambas all about spencerfvee

[Der6VoltFahrers]

I´m currently building a 2017ccm singleport with 37mm inlet- and 33mm exhaustvalves
I had to modify the heads a little bit, to make my speedwell manifolds fit.

Greets Mario

[Almost Alive]

Der6volt..... what the fuck..... I mean seriously.... what... the....fuck.
I can honestly say I have never seen anything like that before. You my friend have some talent.

[spencerfvee]

i am blown away ..super job... just when i thought i saw evey thing .. your a god lol i cant tell but what did you use to form the intake ..it dont look like a welded head but my eyes fooling me lol and how much time do you have in the intake port ..would like to here how you did it ..did you use a milling machine ? to get it flate again great job thanks for shareing spencerfvee..............................................................

[spencerfvee]

does any one know... if VW made a better year single port head than other years like bigger intake better flowing head than other years why i am asking is i am thinking maybe the 1970 1600 head might be better if so what part number would it be on the head ? any help woud be nice spencerfvee

[Almost Alive]

They made tons different SP castings though I don't think there is any difference in flow. Just valve size I think.

[spencerfvee]

thanks for info it was bugging me so i went throught my old books and found out that the 311 101 353 A heads have 20% bigger intake ports and flow better than the other heads there 1967 to 1970 heads so your right as long as they have 35mm intakes you got a good head spencerfvee..........

[Almost Alive]

[Der6VoltFahrers]

A friend of mine did the welding on the heads, he is a genius when it comes to welding on alloy

I did did the porting by myself, I think it took me a week or so to finish one head. Next up the holes for the spark will welded up and new holes will be drilled. I want to use the spark plugs with the smaller diameter

Then the heads will be machined to fit 90,5 barrels and the compression ratio will be raised to 9,5:1.

that`s the plan so far

[spencerfvee]

like i said befor great job and your frierd is a good welder .. what kind of intakes and carbs are you running ? spencerfvee

[ralf]

[mark tucker]

I dont want to piss any body off, but I was wondering about that head that had all of the welding.witch was very nice. but if you were to put in 42x37 valves, unshroud the chambers to the size of the cylinders at the valves&add a swiril to them, then do all of that welding and weld it kinda deep so you could seperate the ports,make an intake that looks like it is just 1 tube but in fact 2 tubes then add the 2 bbl carb that looks like a 1 bbl (with opened venturies) mounted on each manifold. would it still be a single port??? or when welding it up add the center devider so it comes up to within .050 of the top of the head serfacecarb mounting flange but still use single port type manifolds. but now you canaim the charge at the valve much better for better flow,and it is still a single port but with revised runners that will use the inerta supercharging effect much better now. sorry but my brain is always running.it's a shame I cant catch it any more.

[dews70bug]

This thread needs to keep being updated with progress. I have an old singleport out of my 70 Beetle that I would love to build soon.
_________________
1970 VW Beetle
2013 Fiat 500 Abarth

[thefladge]

High performance singe port heads...

This goes against everything I have ever believed.

It's good to see a new twist to the ever-evolving world of VW performance.
_________________
1957 Vintage Baja Bug.
2110cc engine, 40 IDF Webers on Gene Berg manifolds, Engle 110 cam, Bugpack 40×35.5 Street Pro Heads, W8CC plugs, 12.5 pound Flywheel, Kennedy 1700 pound pressure plate.

[spencerfvee]

yes i have herd good things about them there good people .. . but for me i would rather port my own heads its more fun i am doing a set right now for my race car there going to have 40 x 35 valves and bigger intake ports 13s here i come i hope lol spencerfvee .....................................................................................

[spencerfvee]

yes yes i could not belive how well they run i was a dual port all the way kind of guy my buggy friends over the years told me how well they run . now i know what there talking about you know what my grand pa allways said your never to old to learn a new trick .. lol thanks for e mail spencerfvee.............................................

[Luis ''Diablo'' Gutierrez]

ill change the subject a little, i just saw few days ago in sac a pair of speed wells, how they run, are those good for 1776? hard to find pieces?

just curious

[spencerfvee]

your so right i am hopeing more guys will post what they have done to make there single port motors run and pictures of the motors its not all about the heads its what cam they like what carb they like any thing that will make a single port motor run better as you have seen there are guys out there with some great heads they built there way and they dare to be differnt from others there the new gene bergs the dean lowerys of today thanks for e mail i hope others will post to spencerfvee........................................................................... jr quote="dews70bug"]This thread needs to keep being updated with progress. I have an old singleport out of my 70 Beetle that I would love to build soon. [/quote]

[spencerfvee]

hi i just dont know about those carbs at all the UK guys do i am sure and vintage guys will know never ran a set i hope they read this and will post info on them for you as you know vw are the best for helping other vw guys out take care spencerfvee...................................................................................................................................

[spencerfvee]

every one is cool here we are allways open to new and differnt things we dont put others down it does the mind good to think about differt things thats what is wrong now adays no one wants to think lol lol you know i thought about the same thing it would make the port smaller and maybe speed up the air flow food for thought maybe some one has tryed it . any one got feed back on this post ?? the two tubes would speed up air flow but how about one big tube feeding the head with devider seperateing the two intake ports .. some thing to think about thanks for posting spencerfvee................................................................................................