[Tigers] 260 for the 21 century

[Larry Paulick]

Very interesting article, which shows how much work and money is needed to get HP from a 260 ci engine.  When I see claims of 300hp from a 260 in a Tiger, I am reminded of how much work it is to get this kind of hp, as noted in this article. 

I  had an early 2 door Fairlane with a 221ci and 3 speed, which was a lot of fun, and a nice family car. 

My Tiger has a 1990 Mustang 5.0L with F4B, double pumper Holley, roller rockers and roller cam (stock), which dyno’ed at 297 hp at 4800 rpm and torque at 347.  I gave away a 289 HiPo to a friend, cause I wanted a toque engine, not a high rpm engine.

HP is great for bragging, but it is torque that gets you going.

Larry

BTW got engine, T5 trans and all FI including hardness and box for $1200 delivered from local junk yard, after I saw car and engine running in the car.  Cost per hp and torque is hard to beat with CI.


On Jun 20, 2015, at 7:19 PM, Scott Hutchinson via Tigers <tigers at autox.team.net> wrote:

> http://www.wrljet.com/fordv8/indy.html
> 
> 
> Sent from my iPhone
> 
> On Jun 20, 2015, at 7:10 PM, Mark Rense via Tigers <tigers at autox.team.net> wrote:
> 
>> Lot’s of issues chasing horsepower with a 260 project. The 260’s smaller bore restricts valve size, valve shrouding occurs with any valve bigger than 1.85”. The stock pistons barely produced 8.5:1 compression even with the small-chamber heads, shaving the heads enough to get real compression brings squish zones down to a few thousands and screws up flame front propagation, so there is only so much that can be gained, plus the castings can’t support the port sizes needed for modern induction. Sure you can spin one to 8 grand but it won’t make much power because it won’t breath, but I suppose a four valve per cylinder head would cure that!
>>  
>> Once you decide to spend the $900 for custom pistons then doors open. A 3.40” stroke crank brings 313 cubic inches, and better breathing heads, a full roller cam and valve train, and modern intakes all help build torque. Still not a revver but a good street engine.
>>  
>> Of course you have to ask yourself WHY? I mean, who is going to know which block is in your car? Who cares? Well some folks do, since I have built a couple 260’s for them. To them, bragging rights that it’s the original engine are important.  Others just prefer stashing the old 260 under the bench and building something more modern. That’s what I did with both my Tigers, both sport 5-bolt 289 based engines.
>>  
>> I just finished another 5-bolt 331 engine (all Ford Motorsport components this time) and have two more 5-bolt blocks left, then I think I’m done.
>>  
>> Bugz
>> PS If you REALLY want a challenge I ran across a first-year 221 SBF…
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