Alternative to a 2V head

[KEWL65]

Even though I have yet to acquire a 221 for my early falcon, I am wondering what others thoughts are on an alternative to the 2V head - given their scarcity and cost. i was thinking of getting a stock standard 250 head and having a head shop do their thing and warm it up to suit the bottom end.

You might be asking - why so keen on a 250 head. Well I'm really keen on gettng a triple crab set up (one day).

I'd appreciate any comments/thoughts on the above.

 

[XFlow_Fairlane]

could always go crossflow

 

[2v XLE]

Even though I have yet to acquire a 221 for my early falcon, I am wondering what others thoughts are on an alternative to the 2V head - given their scarcity and cost. i was thinking of getting a stock standard 250 head and having a head shop do their thing and warm it up to suit the bottom end.

You might be asking - why so keen on a 250 head. Well I'm really keen on gettng a triple crab set up (one day).

I'd appreciate any comments/thoughts on the above.

Stuff the crossflow

Save the dollars and get the 2v head. If you're going to get a log head machined, ported etc., its going to cost you exactly the same to get the same work done on a 2v head. If you're not in a hurry, 2v heads can be picked up for a couple hundred bucks now and then.

And if you're thinking of going triple carbs... well, a secondhand weber in good nick might cost you $300-$400 alone - you need three. Then there's the bottom end which will need a rebuild etc. You'd be looking at around $4000ish to go triples and do it properly. Its what put me off. I had a triple weber manifold but ended up just going with the standard 2v manifold and a holley 500, with a rebuilt engine and dual exhaust.

Also, a triple manifold made for the 2v head, will bolt straight up. To put any sort of manifold on a log head will require cutting off the log manifold, which is cast onto the head, then some sort of custom jobbie to fit the manifold to the butchered 250 log head.

Something to think about...

PS, And if you're going to spend those $$$, get the aluminium head everyone on this site is talking about!

 

[KEWL65]

Thanks 2V XLE thats good advice

I haven't considered the aluminium head - I suppose the cost is one reason and I havent heard much about the in Oz

I know running triples can be expensive and a pain to tune etc etc and I was actually thinking of doing what a rodder friend has done - which was to blank off the first and third carby at the manifold and have the second carby going. So it looks like you're running triples but infact you're running a single. He's rod (Model A tudor) was running a 202 with strombergs so I'm not sure if that makes it easier for him to do.

 

[addo]

Just run twin carbies. If you can get someone to do the brazing, pretty much everything else can be done with hand tools and a cordless drill.

Fabrication is three main jobs - first making a pair of 6-8mm thick steel baseplates (copy the base gasket shape) that are brazed to the manifold, second job is to cut the centre holes through into the manifold and rectify any gaps revealed in the brazing. Final stage is to make a steel cap for the original centre carb, with internal "fin" that almost divides the manifold into front and rear sections.

Twin carbs worked well for many sixes, and you can get a pair off some less desirable motor like a 170, pretty cheap.

 

[gb500]

reason twin carbs work well is to do with the firing order of the six's - effectively you have two 3 cyl engines.( 1st carb serving 1,2,3 and second carb serving 4,5,6) and why addo is saying to put a divider where the orig single carb is to give the 2 off 3 cyl engines





ie with firing order 1,5,3,6,2,4 you have even intake pulses though the two carbs as the intakes goes though the first carb and then 120deg later the second and 120 deg later back to the the first carb and so on. so an intake pulse through each carb every 240deg




note also generally thats how the extractors are set up ie 123 and 456

of course tripples look sexier and probably give better distribution in the constricted log head

but on the tripples the intake pulse spacing are different across the 3 carbs ( something like 480 and 240deg for carb serving 1,2 , 480 and 240 deg for carb serving 5,6 and 360 and 360 for carb serving 3,4) - if my scribbles are correct

but at the end of the day 1 , 2, 3 (or even 4,5,6) carbs will work.

 

[gb500]

just re read my post - to clarify with the triples these intake pulses are if you have separate carb/intake/runners per pair of cylinders.

if the triples connect to the log then the log acts as sort of a plenum and will dampen/even out the pulsing effect out.

 

[SONNY]

a 2v head isnt that dear,say $500 for a good 1,thats a performance bargain.

 

[Anonymous]

Agreed. I picked up a spare 2V head and manifold a couple of years ago for $250. They are often on Ebay.

 

[addo]

You could probably hire it! $250/yr upfront, with a $250 deposit.

I can just see the old guy with a white beard, standing surrounded by classic Falcons... "For less than 70 cents a day, you can put a smile on a driver's face. Call Fordvison Australia now."