I thinking of ordering one of these in the next week or so, I've done a search with a couple of articles from a couple of years ago coming up, has anyone any feedback good or bad that  has one fitted, or knows first hand what they are like.

So far I have read that they tend to use a bit more fuel, (not really an issue and I would have thought obvious), that they tend to have crank and other motor issues, (I have read this a few times about older/differnt brands of blowers).

The HP/TQ gains are pretty good, for the money it looks like you could get the same sort of figures with some good head work, cams etc. but they are a bit different.

 

 

 

gotta be very carefull on twin cams if ya gunna do it get crank n wheels all trued n welded first then go down to a good set of forged pistons to handle the extra heat also get the heads ported n polished if ya doin an evo with it just need head work an the pistons 9 to 1 is ok but 8to1 be better an ya wont have to change cams if ya got a good set standards will be ok the best cams are the one with least overlap for blowers n turbos .are ya gunna flog it or just cruize around with the look atme lookat me syndrome lol
better of buildin a nice lil sleeper motor for the money when ya pull up at lites n the bloke next to you gives ya the nod (he either gay an wants a fuck or he wants to race) and when ya give it big fistfull an do the seeya later to him in ya rearveiw mirror its all good fun when they cant see shit ..they alot of money an can fuck motors quik if ya dont do it the right way

if you want to lower compression extra head gasket, but would depend on how many pounds of pressure they run?

evo's are good but in past five years i've seen 5 evo's with broken crank pins, the twin cam crank pin much stronger. the crank can slip out of coupoling. but impossible to true them up would take a lot of force. strill welding pin is a good idesa but not worth the trouble wait till you twist it. i went 80,000k riding & drag racing & reving motor to 7,200 rpm & did that for about 7 years them my crank slippe in the pin. picked up near new stock crank had a mate that races nitro harleys weld it as he welds his old nitro harley pins up after rebuilds so experienced. now he uses one peice cranks car type rods. i think stock twin cam rods are good.

good luck

yrs ago when i was riding the twin turbod fxr i stopped at lights coulpe jappas came up beside me an they were on primary side so couldnt see the turbs lol light went red an so did they when i left the line sideways then in 2nd an 3 still sideways backoff a bit got traction an into it boost hit at 3500 an seeya next stop they came to the turb side looked an near fell off their bikes i just smiled an road off they nailed the jappas an the cop 3 cars back got em bout a mile up the road lol

im not homophobic i just think anything that is not natural should be put down for good

iv'e seen a few  broken belt's on these but they have been used hard ,  that hard that this 1 bent the g/box main shaft  ,  that bike used up 3 belt's      they run in pri oil + no adjustment on the belt ,     nothing is for free

Good point there dr as the pressure builds up the belt that drives them gets more load to turn.

i would expect the pro charger that bolts onto the 120R to be a much bigger unit than one for a 88'?

 

A mate fitted one on his new 07 softail and that's had no problems to date with three owners. The crankshafts are a crap shoot with some good some bad so time will tell. Krash one size fits all cube motors but there a few sizes in pulleys for boost applications. The 07 softail's best HP was 138 with 12 lb boost on a stock motor with S&S slip on mufflers and larger injectors and PC3 tuned. The bike was ran with a 8 lb pulley on the street because it was bone stock and that's all the cast pistons will tolerate. The 15 lb boost pulley would need a blue printed low comp motor with forged slugs etc. This bike had hours and hours on a dyno perfecting the tune.

This info is from memory 5 years ago so I'm not 100% sure with those pulley sizes.

 the 1 i saw  had chewed a couple of belts  they don't look strong or wide enough + belt's should not run in oil + no auto  belt adjuster  for the heat expansion rate of all that alloy,    no belt adjuster @ all ,       i have never seen a real good force induction kit for a harley,   even natli turbo's  my friend sold them  the set-up back in the mid 80,s then they changed it 2 suit them self & made a few design faults in the system , i have taken 4 turbo set's off EVBT over the yrs in the 90's & give the fellow a big bore kit instead that still run's  to-day , we use too drag against there turbo bike  on &  a EVBT-80 c.i.   stock rear tyre no sissy bars ,   only  6th's sec slower  with a 125klg rider on a stock old 4spd shovel  frame   any xtra power gain's is alway's around  it just depends if you want the extra xpence + extra weight  & some are just plain ulgy

i think if i was doing a pro charger i'd use it on a TC88 as easier to get good results from a small size motor if your only got one size blower. as the big displacement needs a lot more air than a small displacement. so i think the 120R would need a larger blower to be able to pump enough air in, otherwise they would have the TQ but no HP. but thats very true about not good to run a belt in oil. seen some good strong runing NOS bikes. had a guy with a FXR 80" EVO thats been runing NOS system for some time, he used to come to the track and last time he did some really fast trap speeds Carb motor too.

last - nite had a test ride around the area on that Rocket 3  i mension earlier with the spintex supercharger on her ,   1st time  i ever rode a late Rocket  3 , i use too have a 1969  bsa rocket /trident back when , but stuff me  it spun  in  2nd  about 2/3 throttle  & very strong  ,              dyno read out 10 psi ,  265hp @ 210 ft lb torque,  i think it's the biggest bike iv'e ever ridden  as i'am only 62 klgs ,    i will be racing this bike  240klgs all-up  @ the drags on the  18 march ,   to-day  my neck & sholders are sore  just from about 10 klm's ride,                                                when you back - off    she blows air out of the wastegate  loud,       for - get about your licence

1/4 miles fun but get it out in top gear wide open throttle over 300 thats when life starts

had experience with 148 lol that was fun but kept goin back to big bore jappas with gas or turbos

Hey guys

Thanks for all the replys and info.

I ordered one with 10lb boost last night, it should be here in about 3 weeks.

 

What tuner are you planing to run with this blower and who are you going to get to dyno the bike

 my racing mechanic mate has fitted 2 procharger kit's 1 was a stock T.C.88c.i. stock everything except mufflers  118 hp, the other was a slightly moded later 96 c.i.  149 hp,  he twisted the spline on the g/box mainshaft were the clutch sit's on but a hard rider he is no longer with us anymore

when i past the finish line @ the drags on the 120R i'am already  nearly 1/2 way thru 6th gear   @ 132 mph , on a dyna wideglide  ?

Sounds great with the tune. What size injectors are they fitting. My mates bike hooted power sliding the 200 tyre. I done a 2k ride with him and his blown 96 incher was getting the same fuel consumption as the rest. The only thing that turned me off was the straight cut gear rattle at idle but if I had the money my 103 bagger would be blown.
Good luck with the build.

Macka get your motor tuned right first m8!

if you have not got the tune right now this will not be the solution. you get the motor tunned and runing to its max then see if you want more.

just what i think, but after seeing how the Frazers bike runs at Sydney drags i think your 120R will be enough for a strong runing street bike.

 hi john,   when i run-in  & tune the new 120 R  in about 4 weeks time i will give you a ride on her  even if it's just in the pit's @ the raceway or i could meet you some were  before she goes too the race track , , i will be modifing the heads  port & polishing over the top of the already CNC factory ported heads  , welding the drive side  crank pin  , upping the comp from 10.5 to 1  too ?, + modification's too  the inlet manifold & heavey breather, throttle body   58 m.m. + will be running stock modified exh system just too show that the stock headers will work up too a certian level ,

1 will be aiming for about 135 hp @least if not 139h.p. any way i will forsure give you a ride because you are a good bloke ,   & i recon your earned it ,  so when the bike is ready & still fresh even before her 1st outing @ the track  you can have a ride , we can swap bike's on a sunday  ride for 20 mins up the old heathcote rd  once or twice , 

Any pic's of the Pro-charger bike setup? I'd love to take a look.
And yeah....heat is a performance killer when it comes to blowers (on my Chev suburban with the Whipple, I see IAT's of well over 100degC in summer....need to fab the intercooler up ASAP). A good intercooler, or maybe a meth/water injection setup will remedy that though.

I'm sure it does go well BC, i've seen how changing pullys changes HP & TQ & when it comes in. a m8 has an engine dyno but only puts car motors on it.

my friend just said the bike he worked on with pro charger felt heavy to one side. some people would not care he just likes to ride for enjoyment. likes bike well balanced. everyone to what they personaly like.