I have a 730 and Randall had said earlier in the year that he was looking to make a stroker kit that utilized the 730 jug to get 770 cc's, anyone heard any news on this project?

 

I sent them a pm asking the same question a couple of months ago and Im still waiting for a reply[img]i/expressions/face-icon-small-frown.gif[/img]

 

I wonder if it's a matter of not enough interest? Surely there are a bunch of 730 owners like us that simply want more after living with the 730 for a while. Don't get me wrong, the 730 is superb but it's human nature to never be satisfied. Come on Randall, I've got this cash burning a hole in my pocket, help me spend it!

 

I can only guess as to whether this would blueprint out. I would be surprised if the skirt is long enough to add enough stroke to be worth the price.

I don't see why a 4mm stroke increase would cost any less than an 8mm stroke, except that you might be able to use your existing 105.5mm cylinder.

Bang for your buck, I would be inclined to look into the new cam and porting options as well as twin carbs before i started looking at a 4 or 5mm stroke.

Lets say for fun that you spent $3500 to take it to a 770 and your current 730 is making about 70 hp. The added stroke would net you about 3.5 avg hp and about 2.5 lbft avg TQ.

Now lets say you took that $3500 and upgraded your porting and cams and bought a set of twin carbs. With the huge advancements with porting and cams and the huge benefit of twin 38mm Lectrons, you could easily see mid 80's on hp and a torque curve that holds out much longer.

I don't know the exact prices but these numbers don't sound far off to me and i know the second option will increase your power dramatically compared to the benefits of the stroker crank.


Goodsound - Have you priced a Pami 760? That is always an option[img]i/expressions/face-icon-small-smile.gif[/img]

 

I curently have HPR4 cams and HPR's race port job, their best port job they offered as of about a year ago, are there better cams/porting now available? What kinda $ ya think I'm looking at for dual carbs?

 

There might be some gains to be had for you in the area of porting but cams and carbs would make a huge difference in holding that torque curve out allowing more hp.

I am guessing again but the dual carbs with intake and snorkel would probably be between $1100 and $1300 for twin 38mm lectrons. Randall has used ones now and then that go for less.

I would ask Randall or Eric how the newest cam grind we were running at Albany will work with your port technology.

 

Yes, I have considered the 760, but I REALLY wish I would have started with the Pami 725. Now I kinda have to start over from scratch. I am also considering dual carbs but mine will be FCR's and not lectrons [img]i/expressions/face-icon-small-wink.gif[/img].

 

You will love dual carbs. [img]i/expressions/face-icon-small-happy.gif[/img]

 

The Pami 760 was designed for the stroke from the get-go and the skirt is thicker requiring machine work to the cases.

HPR designed the jug to be a drop-in for a big-bore (not a stroke). The 727/730 jug has a thinner skirt which allows it to be dropped in WITHOUT machine work to the cases. Great for the guy looking for the weekend upgrade. BUT, I wouldn't recommend putting a stroke on this jug. . . the skirt may be too thin. I'm not saying it is a faulty design, just NOT a design for a stroker application. It is designed for a stock stroke. I wouldn't want to be the one putting a stroke on a jug designed for a stock stroke.

If you want a stroker, sell your jug and piston to someone else and start from scratch.

Talk to HPR, maybe they've got something up their sleeve [img]i/expressions/face-icon-small-wink.gif[/img]

As for strokers. . .

The Pami 760 stroker uses a brass bushing in the rod bearing (same as stock).
Falicon (see below) will tell you this is a weak link but, the reality is the only time I've heard of issues is when the engine is run without oil. . . not recommended [img]i/expressions/face-icon-small-wink.gif[/img]

The HPR stroker uses a Falicon Crank which uses roller bearings. . . they say above.

Now, I'm not going to get in the middle of which one is this or that. . . just filling you in on what I've heard.

As for the carbs. . . Love my dual FCR 39's.