Stroking the Pinto to 2.2ltrs

Hi Guys,
 
I am just getting started on gathering info on building up my engine to handle a few tracks days and a bit of spirited driving.
 
I have been on Turbo Sport http://www.turbosport.co.uk/showthread.php?165466-pete-a-2-2-197bhp-pinto&highlight=how+to+stroke+a+pinto and just wanted peoples opinion on getting the engine stroked to around 2.2 ltrs.
 
1.  Approx cost for getting the crank offset ground around 3mm
 
2.  Piston & Rod info or combinations would be great with rod lengths and piston size or even guys or shops to speak to source the parts.
 
The car won't be a daily driver so a few bad manners is OK but I like the idea of an engine that has more torque down low and that I won't have to rev its' nuts off to get it to go.
 
Any opions or experience is appreciated
 
Cheers
 
Matt
 

Using datsun L16 rods will do, you also need shorter pistons and i believe you can only grind the crank 2mm

Matt75

Hi Guys,

I am just getting started on gathering info on building up my engine to handle a few tracks days and a bit of spirited driving.

I have been on Turbo Sport http://www.turbosport.co.uk/showthread.php?165466-pete-a-2-2-197bhp-pinto&highlight=how+to+stroke+a+pinto and just wanted peoples opinion on getting the engine stroked to around 2.2 ltrs.

1.  Approx cost for getting the crank offset ground around 3mm

2.  Piston & Rod info or combinations would be great with rod lengths and piston size or even guys or shops to speak to source the parts.

The car won't be a daily driver so a few bad manners is OK but I like the idea of an engine that has more torque down low and that I won't have to rev its' nuts off to get it to go.

Any opions or experience is appreciated

Cheers

Matt

 
Matt,
In my opinion stroking the engine really isn't worth the expense.  You are far better of investing the extra money into the cylinder head/camshaft area and making it breath better.  The results are is most cases better.  The other thing you need to factor in is that if you stroke it, it puts you into the next class when racing which in most cases is 2000-3000cc.   There are really good off the shelf rods and pistons available for these engines now at a decent price, and if the engine is done right it will make its power well under 8,000rpm which means not revving the bags out of it.
 
If you really have you heart set on making it bigger in capacity, the simplest way to do it is to offset grind the crank as you suggested, and use the Datsun rods and a set of custom pistons.  I don't think you'll get it to 3mm offset.  In relation to cost offsetting the crank, I suggest to give Crankshaft rebuilders a call in Melb to give you an idea.
 
Cheers
Woz

Matt75

Thanks Woz,

I just trying to gather info at this stage so your repsonse is appreciated.

I was thinking that bang for buck it may be an option but doesn't sound like it.

As I would need to get new pistons & conrods anyway the only added expense as I see it would be the offset grinding.
I take your point about the change of racing class.

Cheers,

Matt

 
You also need to factor in that rods aren't off the shelf.  Even if you use Datsun rods they will need to be modified.  Same with pistons, although alternatives may be available (eg: out of another engine) chances are they'll need to be modified to fit in certain areas.
 
So you'll need to factor in
-offset grinding crank
-modifying and purchasing conrods
-possibly modifying pistons
-balancing.  Usually it will be extra in an engine like this.
 
Cheers
Woz

Matt, if in Melb try Dandy engines they did mine, very good and helpfull guys and didnt cost as much as i expected to offset grind and deck the block etc.

Matt from memory i can dig up the bill if you like crank grind about 200 and ballancing about the same and decking the block about the same i know it was around 700 all up, those guys understand yr a nutcase and simpathise with us..the crank guy is called fish i believe, anyway very helpful indeed.

Hi Matt, got your email about this but slack in replying, DONT DO IT,
When it did it aftermarket stuff was very expensive compared to now, but if you must the rods are l16 , few choices of pistons and the crank gets stroked 2mm . Dandy rebores is the place to get the crank done. Keep in mind the pistons dont fit the rods which dont fit the crank so if you cant do some of the machining yourself it will get expensive
Buy reasonably priced aftermarket rods and pistons that fit without modification and then sink your money into the head
Chris

Hi Matt
I'm 1 of the few that has done the big bore/stroke Pinto 2186cc. I used 93.5mm Capri 2.8i KS pistons and offset 0.060th/1.5mm on a minter crank...i wanted to go bigger but crank brgs size limited that ! The block was decked err 1.0mm or so, the head had 0.120th/3mm skim, ported at home and bought Burton s/steel waisted stem std valves, Kent FR32 cam with VS9 single v/springs. Twin 40 webers , the motor had very good low down torque....someone in Crafers bought it for $2500 back in 2003 for his cortina !