90ci 2005 Sportster

[TT60]

[quote=norseXL;4005607]

Damn buddy, not shure how to break this to you gently but;





There is 7 billion people out there doing the metric, most of them in contrys who have been using it for a hundred years

Not around here We still buy gas and milk by the gallon and the Speedlimit signs are in MPH. Go into a Home Depot or Lowes and they have hundreds of tape measures in inches and feet and even 23/32", 15/32" Plywood plus 2x4x8, 2x4x12, etc.

Maybe one day will go metric ?? but until then I'd like to get a 25' Metric tape measure

[WinterWheel]

The point is, you're one of (if not the only) remaining country who have not converted to metric.
Don't get me wrong. I grew up with the imperial system, and I still struggle to convert. The real problem for us Canadians, is that we're stuck in the middle use SAE & Metric. Not only do we have to buy twice as many wrenches (for metric), but we have to stock up on SAE tool sizes as well.
Of course, building a house is measured as 16-inch or 24-inch on centre. So, we're stuck with 2 XLF's systems for the short to mid term...

[A 4 liter V8 eater]

Originally Posted by aswracing

If CP has any plans for an X-forging that will support the 88ci kit, they haven't told us about it. They know we want it, but I'm not sure the market is big enough to justify it for them.

Not sure if ductile is available in a finned, stock height cylinder or not. The standard cast iron cyls are available again, though. But you don't want an X-Forging with those.

At one point Axtell iron 88" cylinders were ductile iron, weren't they? If so, why did they go back to cast? Would x-forging style pistons work in ductile iron better than cast?

[NRHS Sales]

Axtell makes ductile iron cylinders that are mostly used for racing but they are extremely expensive and really do not have the proper cooling fins for street use. The 88" and 90" street kits have always been either all cast iron, iron lined aluminum or nikasil lined cylinder.

[aswracing]

Originally Posted by A 4 liter V8 eater

At one point Axtell iron 88" cylinders were ductile iron, weren't they? If so, why did they go back to cast? Would x-forging style pistons work in ductile iron better than cast?

You are correct, the Axtell cast iron cylinder is a ductile alloy, although not the premium 80,000psi tensile ductile used in their racing cylinders. But it has better lubricity and tensile strength than the typical G2 type cast irons.

But it's the expansion coefficient that makes it incompatible with the X-forgings and other slipper skirt type pistons.

The X-forging is not near as radical in terms of minimal skirts as say the Wiseco, instead they put a lot more emphasis on strength with the ribbed forgings. I'd sure like to do a weight comparison between the two, my guess is they're pretty close.

Axtell can make you cyls in the premium ductile ... any size you want, with or without fins. Most are made with cylinder base bolts, which have the advantage of preventing stud stretching, and also allow the bolt patterns to be different between the head and base surfaces. In the 80,000psi version they run about $1400 a set, and in the 100,000psi material (which they make their thin wall Pro Stock cyls from) they run about $2000 a set.

[aswracing]

Originally Posted by jessearias

Hammer Dan is the man! A super excellent street motor!

Careful, he won't be able to get through the door with that big head!

[A 4 liter V8 eater]

Sorry to be a pest but,

What was the compression ratio of the engine behind the posted dyno chart?
What options were chosen for the sledge porting?
Was the intake ported?
Was the dyno done with or with out air filter?
Which air filter?

[aswracing]

4 liter, I'll get you some answers, I wasn't intimately involved in this thing, it was Hammer Dan's project. Stand by.

[DonChicago48]

I am avidly reading these threads while my engine is at Hammer Performance getting the 90" upgrade. Mine is similar to this one, but has the Hammer Crush 600 cam and 30 degree squish band machined into Sledge-ported XL '04-'06 heads. I'm using a Mikuni HSR48 carb for now, but planning to use an RB Racing RSR Fuel Injection system in the near future.
I'm hopeful that mine will have enough low end torque to make it street tractable. I am also upgrading to a Baker XL6 six-speed trans with a 2.52 first gear instead of the stock 2.69. So I'm using an XL 883 27-tooth final drive pulley which yields overall gearing of 5.69/1.94 in 1st/6th gears as opposed to the stock 5.66/2.10 in 1st/5th gears with a stock XL 1200 29-tooth pulley.

[DonChicago48]

Here's a link to a more detailed description of the RB Racing RSR Fuel Injection system