Stroked 2F
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So, where do you get a "stroker" crank for a 2F? Just curious as to who makes one.
Thanks for the post,
Ed
Thanks for the post,
Ed
are you asking about the benefits of stroking the engine or the downey cam? How do you plan on stroking the motor? weld and offset grind the crank or altogether new crank?
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Yah I meant using the stock crank and doing whatever else to get more power. Porting the cylinder head and using chevy pistons maybe? Can't you get a 2F up to like 4.5 Litres or more?
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Waste of time trying to stroke the cruiser motor. It does not rev well to begin with. longer stroke would make that worse.
Valve work is a waste of time. You will only lose low end power.
Mill the head (more compression)
And put a bigger cam in it.
That'll do about as much as possible to a 2F with out foing to forced induction..
Valve work is a waste of time. You will only lose low end power.
Mill the head (more compression)
And put a bigger cam in it.
That'll do about as much as possible to a 2F with out foing to forced induction..
'Stroking' an engine means using a crank with a longer throw.
You get about 4.3 litres out of a 2F by boring it out, but you negate some of that by decking the head. You don't want to try porting the heads, that'll cut into your low-end power. If you want high-end power, buy a sports car
You get about 4.3 litres out of a 2F by boring it out, but you negate some of that by decking the head. You don't want to try porting the heads, that'll cut into your low-end power. If you want high-end power, buy a sports car
The "liter" calculation has nothing to do with the head dek height..
In fact, decking the head and adding a longer stroke crank will really increase your compression ratio
BTW, turbo's and 2F's rock
In fact, decking the head and adding a longer stroke crank will really increase your compression ratio
BTW, turbo's and 2F's rock
Man, the world of mis-information. decking the block or head does nothing to displacement. It is calculated with bore and stroke.
getting a 2F to the 4.5L range is going to take some serious cash. You'd be looking at some serious cash on custom pistons, rods, crank etc. Just not worth it.
I disagree with port work being bad. cleaning up the casting around valve seats and whatnot is not bad in any case. Hogging out the ports to flow like a dragster is bad. big difference. cross section of the port should remain very close to stock size. clean up radii and the boss around the valve guide.
getting a 2F to the 4.5L range is going to take some serious cash. You'd be looking at some serious cash on custom pistons, rods, crank etc. Just not worth it.
I disagree with port work being bad. cleaning up the casting around valve seats and whatnot is not bad in any case. Hogging out the ports to flow like a dragster is bad. big difference. cross section of the port should remain very close to stock size. clean up radii and the boss around the valve guide.
Search under the hardcore section. I remember a while back reading about a turboed 2F.
Chris
Chris
how about this
2f...bored 40 over, rv cam,38mm weber,downey header,2 1/2 inch exhaust,mallory dual point dist with a hot coil,jacobs ign. wires, shaved head. this set up ROCKS!
still have really good low end, and it runs like a v8 i'd do it again in a heartbeat! .02
2f...bored 40 over, rv cam,38mm weber,downey header,2 1/2 inch exhaust,mallory dual point dist with a hot coil,jacobs ign. wires, shaved head. this set up ROCKS!
still have really good low end, and it runs like a v8 i'd do it again in a heartbeat! .02 
Shave the head, Deck the block, Reground CamShaft, Oversize Pistons, (MAybe even the dommed pistons from MAF), Downey header.
Mace said:
why is that? any decrease in intake temp is a more dense intake charge, so its not a bad thing at any point, especially since the turbo adds heat by both exhaust heat transfer as well as the function of compressing a gas at any RPM.
Now, I certainly agree that the extra time and effort to add it is not a small feat, so choose accordingly.
The cooler charge can only be utilized in larger volumes of air or higher amounts of boost (i.e. a diesel application where 20 psi is not atypical)
An intercooler will make a negligeable difference on a 2F.
Additionally, the intake routing with a standard intercooler would be a nightmare.
If you want to cool the intake charge look into water injection. Much more benefit/cost.
An intercooler will make a negligeable difference on a 2F.
Additionally, the intake routing with a standard intercooler would be a nightmare.
If you want to cool the intake charge look into water injection. Much more benefit/cost.
How much did you shave the head?how about this
2f...bored 40 over, rv cam,38mm weber,downey header,2 1/2 inch exhaust,mallory dual point dist with a hot coil,jacobs ign. wires, shaved head. this set up ROCKS!
My .02 coming from a man that loves the 2F, if you want more power just go and install an LS or pick your flavor of engine. The 2F’s greatest quality is its durability, it’s an ox and you’re not going to build it into a racehorse. There’s dozens of reasons why, flywheel weighs as much as my neighors mom, crank is so long/heavy and unsupported by only 4 main bearings your gonna damage it with massive power or RPM, gear driven cam, long pushrods, I’d wonder how the oiling system would keep up, stock internals are extremely unbalanced from the factory, etc. etc.
It’s great for driving up logging roads at 20mph and doing that for 50 years. And that’s about it.
It’s great for driving up logging roads at 20mph and doing that for 50 years. And that’s about it.
