Flash 6: Deepinnaharta Freeway Cruiser

[Wheelman-111]

Greetings:

Sorta hurtin' for ride time between new job and moving chores...
This Malossi setup feels stronger than the Corsa, not as revvy. Based on how quick it gets to 65, im confident it's as fast on top. Still running 7.58 gears. Metropolitan belt works well.

[Wheelman-111]

Greetings:

Finally got a few hours to ride and test. Killer take-off even with 7.58s and medium-length Metrombelt. Got on Highway, Down-Crosswind, even an overpass slope to maximize braggy top speed. Pulled Garmin Ho from pocket to read....90 MPH.

OK once again I had forgotten to reset her after the last dry cleaner run in the Wheelman Family Trucklet. Started over and this time I didn't get as good a run at the overpass. Still, throttle widemopen for over 2 minutes, temp stable at 397-398 (air was around 70), Scorpion Song was crisp, and... and... 63.7. That was all she wrote.

Disappointing after seeing 71.2 with unported Corsa and less-fabled PG Short I was. I plan to try the same run with that pipe and see if the top end is any better. Otherwise it runs great aound town, if a bit loud. RPM didn't crack 10K.

[bonesv]

Greetings:

and... 63.7. That was all she wrote.

Disappointing.

Did you try the other belts you have? Seems the metro-belt could be a tad long.
How about the magic marker trick to see where the belt is riding, on either pulley.
Thanks for the report.

[Wheelman-111]

Greetings:

The Met belt is 660 nominal, about a cm shorter than the 669 used to see 71. If anything it should be faster.

[Wheelman-111]

Greetings:

Just checked my Sharpie marks. Front pulley erased to within 5mm of the outer rim, back pulley Sharpie marks not visible at all. Also fumigated with propane checking for vacuum leak; none found.

It seems the Speed Deficit was RPM-induced - or rather LACK of RPM. I had swapped to the +2000 spring and went down on roller weight, but still seldom see 9500 at WOT and apparently not much more at top speed. (I confess I didn't think to look in all the windswept excitement, not that I could see with Wheel-tears clouding already dim Wheel-vision.) The Malossi did seem a bit less Rev-Happy than I recall the Corsa being, and maybe that's the HP-limiting factor in my applicaton.

Anyhow, PG Short went back on this afternoon. Neighbors had a celebration for the reduced noise. Will Top Speed test tonight, weather permitting.

[Meejacob]

you want the mark on the front pulley to fully be erased if im not mistaken. Thats how i tune my trans anyway and it seems to work great. Are you using the stock S trans wheelman? Dont understand why your not cracking 70. If im not mistaken you said you went to the 2000 center, wouldnt you have to go heavier on your weights instead of lighter because of the added rev from the 2000 spring?

[Wheelman-111]

Greetings:

You're right about the heavier weights to balance the stronger spring. My issue was not getting fully into the meat of the power band at WOTwith 30 or 32 grams. I have the ZX setup and a Polini-for-Ruckus front pulley - 94mm - so I'm getting about 89mm of front diameter - bigger than the very rim of a stock pulley. (87.5mm if I recall correctly)

I do plan to experiment with the tranny, but I'm also wondering if the power is going soft at WOT because it actually pulls a little harder when I close it a little. My next step will be a size larger Main to see if it helps.

[LMH]

Check the dome of the piston if you can get an eyeball in there or use one of them remote view inspection cameras. The MHR pistons burn away if ran too long without proper high tune. I had just noticed the dome of mine retreating on my first MHR excursion, quick message to mr keith redeft solved the fading piston. I always have issues keeping my MHRs under 11k, never heard of a problem getting them to rev yet.

[Wheelman-111]

Greetings:

No Tinker-time but your thoughtful responses give food.for Wheel-thought. MY MHR has always seemed to make more happen right off the start and pulled harder than the Corsa did all through the midrange. But it never has had the higher RPM POWER SUSTAINED like Corsa did, all the way to 10.5K or more. In contrast, My MHR seems to soften up on power around 9500.

The high temps I'm seeing suggest a reason; lean jetting on top. The tranny may not yet be perfect, but the power has to be there in order to tune the trans. For a while I believed the Polini-for-Ruckus/ZX was shifting too quick, and it was. But the reason now appears to be the power drop, not the variator. The vario is only doung what it's supposed to do when the thrust decreases and the pulley cams upshift.

[Meejacob]

What springs are you using in the clutch? Stock clutch? I would try get rid of that ruckus pulley and metro belt and try something else. Kelli pulley with an M7q belt made for zx trans perhaps? or possibly the 654 18 30 big teeth. I personally use the M7q but some prefer the 654. Totally different tuning when using those belts though.

[Wheelman-111]

Greetings:

Clutch is working just fine, given they're ALL too small. Mine's a 2-shoe adjustable Polini that has seen service on 4 engines and 2 frames.

You arme correct in that the 654 is faster than the longer belts, but the shorter belts kill the take-off and the whole purpose of the ZX setup with tall gears. Flash 3.26 ran 71+ with the 669. My problem is with power, not transmission, methinks.

[paulpauly7]

i know it sounds odd but maybe lower that super high compression a bit down to a more gentle 145 - 150.Huge compression doesnt always help .If you are a bit of a dare devil (Which we all know you are) get some diamond tip dremmal bits and raise up that exhaust port 2 ring widths and widen by 1 (1/2 each side) and also polish the exhaust port to a mirror finish .

These are just suggestions comments welcome

[Wheelman-111]

Greetings:

I'm a daredevil, Pauly, but painfully aware that Wheelman "Skills" aren't up to the care and precision required to carve expensive Nikasil-coated Maestro Malossi Masterpiece. If'n I do decide to lower compression, I'll add a mm of head gasket or somethin'. One other thing I've considered is to measure capacity of a leftover Polini Corsa head I have hanging around and see if it's bigger than the Malossi piece. (WHAT?! HERESY!!) I may just take the lazy man's way out and just install it and then do a compression test...
But what would I call it?? Malini? Polossi??

[paulpauly7]

how bout a CORLOSSI

[Meejacob]

Ive seen people do it with a Corsa and malossi cast but never with an aluminum. I dont see your logic behind the 654 making take off slower? the 654 was made for Zx trans. Your trying to run a belt that isnt made for zx trans, thats how i see it. People down here run the 654 and M7q and get good results. idk i havent run one for myself so i could be wrong but Just try it, or * if i can find my spare one ill send it to you for free!