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[jinxltd]

IME and testing the MM motors will start to have diminishing returns after 100hp at 95". Throttle body airflow and injector angles hinder the performance gains. Some of the early HD packages that used bigger cams and heads such as the SE Performance heads that offered improved airflow reached a wall and the smaller cam and head (TW37, S&S 570) type of builds would out accelerate them and give better performance overall. Today if one is determined to keep the MM injection best bet is to see HPI and get their single throat TB with Delphi injectors. The wall is now removed within reason. The MM is still Alpha-N so it has a little drawback when tuning high compression motors but that can be worked around in most circumstances. I am working on a set of heads for a 120 that uses MM injection and makes 151hp so case and point it can be done.

wow that would be a monster build! what do you think of the 98 biuld any cam & head recs? use my stock & get them reflowed? buy s&s or screamin eagle heads? cams? thank you for your info unfortunatly Im still learning this stuff so please be patient Im trying not to ask any questions youve awnsered, if I di I appologise Im pretty green. but very thankful

[HD Street Performance]

Here is what I would do assuming the MM is reused with no changes and assuming you have the red injectors
Go up to 98" with CP pistons and stock cylinders overbored, mild head work, compression at 9.9:1, Andrews 57n cam would be ideal. Goal would be close to or a little over 100hp and a big fat torque curve that comes on early. This will require changing all of the cam plate hardware including oil pump to 2007up big twin OEM parts available from the dealer. Andrews provides instructions for the conversion. Also needed will be the Andrews outer cam drive sprocket, details are in the instruction sheet. In the process of doing that the old tensioners will go away and the new hydra tensioners will take their place as well as a higher volume oil pump and roller chains front and rear. This cam plate assembles with slip together parts and no special tools are required. Nonetheless if you haven't built Harley motors before it may be wise to turn this over to a competent shop. At 65k I would be checking the rods which is easily done with the bottom end still together. Assuming the rods are OK and the crank runout is not excessive I would do a top end only build and ride on.
Use a Power Commander to tune it and find a shop that understands the MM.
None of this work and parts will cost a fortune but will restore the motor to as-new reliability and add over 25% torque and horsepower

[Twolanerider]

Thanks for your help & info, it is greatly appreciated. Mine is the black & orange. Unfortunatly I just had the timing tensioners & cams done about 1000 miles ago & they told me I had too much runout to go gear so that is a bummer but not the end of the world. I think the direction Im leaning tward is keeping the fuel delivery (MM) & going for the 98 setup, Going fo max power I think anyways lol. but thank you soo much for the help I know when it comes to performance & engines there is a million diufferent ways to do it & probably 1k way to to it right . Ill check into head guys & find a 98 kit, I checked Zipps & I didnt see one from them maybe I just arnt looking in the right spot. much thanks for sure

Here is a link to the Marelli retrofit kit from Zippers.  I'm not a huge fan of the company itself but for it's purpose this kit does a good job and puts a lot more troubleshooting and engine management information in your hand (through your computer) than you ever had with a Marelli system or even a stock Delphi system.  The Thundermax is of course an "old" product now.  Other tools out there that can do more on newer bikes.  But as a Marelli retrofit it is an option at least worth considering.

http://www.zippersperformance.com/products/fuel-air-efi/thundermax/thundermax-marelli-efi/thundermax-with-autotune-marelli.html

[Twolanerider]

Here is what I would do assuming the MM is reused with no changes and assuming you have the red injectors
Go up to 98" with CP pistons and stock cylinders overbored, mild head work, compression at 9.9:1, Andrews 57n cam would be ideal. Goal would be close to or a little over 100hp and a big fat torque curve that comes on early. This will require changing all of the cam plate hardware including oil pump to 2007up big twin OEM parts available from the dealer. Andrews provides instructions for the conversion. Also needed will be the Andrews outer cam drive sprocket, details are in the instruction sheet. In the process of doing that the old tensioners will go away and the new hydra tensioners will take their place as well as a higher volume oil pump and roller chains front and rear. This cam plate assembles with slip together parts and no special tools are required. Nonetheless if you haven't built Harley motors before it may be wise to turn this over to a competent shop. At 65k I would be checking the rods which is easily done with the bottom end still together. Assuming the rods are OK and the crank runout is not excessive I would do a top end only build and ride on.
Use a Power Commander to tune it and find a shop that understands the MM.
None of this work and parts will cost a fortune but will restore the motor to as-new reliability and add over 25% torque and horsepower

Recently did one nearly identical to this.  Bike ran great too.  It was an 88" to 98" upgrade so the before and after was even more pronounced.  For a regularly ridden street and highway bike it was a great combination. 

[HD Street Performance]

They run well, and of course as always pipe is a big factor in success.
I would run the zippers if it was less expensive than the HPI and a PC. The Thundermax is equal in performance to the Magnetti Marelli and is current and supported hardware a plus. Also settings can be tweaked by PC interface with more control another bonus. To get this same functionality with the MM it would take a SERT which is a morphodite these days and very few tuners would be able to leverage that devices capabilities properly but a few can.

[evodistraction]

Or............................................................

http://www.cvoharley.com/smf/index.php?topic=90333.0

Just say 'in!!

evo

[Twolanerider]

Or............................................................

http://www.cvoharley.com/smf/index.php?topic=90333.0

Just say 'in!!

evo

Is the S&S engine supplied with the S&S VFI ingnition module and their Protune setup?  If not the requirement of a cam position sensor on a 2000 Marelli bike keeps it from working. 

[evodistraction]

Is the S&S engine supplied with the S&S VFI ingnition module and their Protune setup?  If not the requirement of a cam position sensor on a 2000 Marelli bike keeps it from working. 

It's not mentioned in the add, I would contact the seller if there was any real interest in going that way. My point was just to suggest that some kind of turnkey upgrade might be easier and maybe even less costly in the long run. The suggestion about a MOCO reman would probably be more practical if he decides not to do a complete rebuild. IMHO!

evo

[jinxltd]

Or............................................................

http://www.cvoharley.com/smf/index.php?topic=90333.0

Just say 'in!!

evo

Nice would that about bolt in? Or is there modifications needed?

[evodistraction]

Nice would that about bolt in? Or is there modifications needed?

I've no clue but I'm sure there are guys here who do. It could be a major pain but it would be an awesome plant and maybe worth the effort!

Evo