Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Aug 30, 2016 19:56:10 GMT -5
Has anyone experimented with a crankshaft? I haven't messed with a crankshaft in my scoots, but a stroker crank will deliver more torque (I found that out in a '69 Dodge Super Bee 440ci V8 that I had, wish I still had it). It also should increase the compression ratio so premium fuel is a must. Acceleration would improve, but won't give you any more top end speed. For my money, the best gains I've had with a stock 4t were unsealing and tuning the carb with bigger jets, and tuning the CVT (also the cheapest ways to get more power). Dan: I had a 1970 Plymouth Fury Police Interceptor that I completely rebuilt the engine on and took it to college in 1976. The 1970 Police 440 had the most HP (390) from the factory of any stock 440 before or since. I used the stock crank but went with high compression pistons and the Chrysler racing "Purple Shaft" cam, bored .030 over, headers, glass packs, new Mallory dual point distributor and 50,000 volt coil. New Holley 650 carb, weiand aluminum mid rise intake manifold, and, after a total A727 transmission rebuild (done by pros) a shift kit was added. I really wish I still had that car...that thing flew! No dynos around me then but we estimated about 500 horse power from the modifications made. It had a certified speedometer to 140 mph which I had pegged more than once. It would not even shift into third gear until past 100 mph! (Cop rear end gears) I also got 20 mpg going from NJ to college in KY on many, many trips. 70 mph was like 1,700 rpm on my tach. We set the redline at 6,500 to be safe. Later, I was clocked by a KY State Trooper at over 153 mph. He was mad that his Ford (460 cu. in. Crown Vic) could not catch up, ha ha. (Gave me a ticket for 78 mph, otherwise, I would have gone to jail, being more than 25 over the limit.) Man, I miss that car. Some of my friends had 426 Hemis around that time, (425 HP from the factory) and I liked those engines too. Now, I have a hemi in my little 49cc scoot. Most folks do not believe me when I tell them this but, my factory manual says it is so. Ah, memories...(sigh) Bill
|
|
|
Post by dan50 on Aug 31, 2016 1:28:40 GMT -5
I think your 440 had more than 500 HP. I had a .520 lift cam, .030 over, notched Nascar pistons, 850 Holley double pumper, Weiand Tarantula manifold, headers with glass packs, solid lifters (I kept it at 7,500 RPM or less (powerband was 6,000 to 7,500 RPM), 11 pound aluminum flywheel (stock is 46pounds), Kelsey-Hayes racing clutch, 3,600 pound pressure plate, it screamed. The goodie list is a lot longer. Mine had a Hemi 4-speed. The engine dyno'd at 780hp. Yours should have had at least 650hp, more like 675.
Yeah those Mopar 440's could really move! I never lost a race in mine. Gratiot Ave. or Woodward, Look out! I never got a ticket in the 7 years I had that car and street raced it.
Memories are good!
|
|
|
Post by eclark5483 on Aug 31, 2016 3:16:27 GMT -5
I'm jealous. All I had was a 73' Barracuda with a 340 4 barrel, 904 Tranny, 3.73 rear. And a 74' Duster with a 318 3 speed, still went like a bat out of hell. Love them Mopars!! So easy to work on. My very first engine rebuild was the 340 I put in my Barracuda. Came stock with a 318.
|
|
|
Post by dan50 on Aug 31, 2016 3:54:53 GMT -5
The 340's were real screamers! They could easily beat a Chevy 350 or Ford 351. A 340 in a 'Cuda was a great combination. I bet you had a lot of fun.
One of the best races I had, and I won by a couple of feet was against a '72 Duster with a 340 6-pack, he gave me a solid run!
|
|
|
Post by eclark5483 on Aug 31, 2016 4:14:14 GMT -5
I kinda had TOO MUCH fun with it. Lost my license for 6 months from losing too many points. I got a little too brave with it too. I remember one 4th of July weekend, driving down the highway and passing 5 cars all at once before coming back into the right lane.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Aug 31, 2016 9:55:24 GMT -5
The really funny thing is, and this is probably why I loved the 440s, my Dad bought a new 1970 Town and Country (Chrysler) station wagon with the trailer towing package and the 440 engine. That one had 375 HP factory (It had single points ignition as opposed to the dual points like mine had)but, the towing package gave it some really low gearing in the rear. (I can't remember exactly but it was low, maybe 4-11?) That accelerated like a bat and, was the perfect sleeper.
Once, in 1971, I was 13, the family was coming back from dinner and we were at a light where in about 1,000 feet past the light, the two lanes merged into one lane because the left lane ended. There were plenty of signs but, every now and then some yahoo would pull up and try to get ahead of you and/or cut you off in the process. We were sitting there waiting out the light and a jacked up 55 Chevy with really loud pipes and racing slicks on it pulled along side my Dad in the left lane. I was in the back seat and watched my Dad quietly shift down into 1st on the column. (Auto trans...you had to do that so if/when the back wheels broke loose you could keep it from upshifting too soon) Those kids in the Chevy were reving the engine and making the car jump a little by popping the clutch. Light turned green and, we were GONE! My Dad feathered the throttle until we had good traction and then floored it and hit 2nd and we beat that Chevy by about 10 car lengths, ha ha. My Dad hit 3rd but my Mom yelled at him so he had to slow down. She was afraid he might have been a bad influence on us kids by doing that, ha ha. I think she was right...and I am glad.
Those kids must have wondered what happened. Our wagon was totally stock too. I miss my Dad but have a lot of great memories like this one.
Bill
|
|
|
Post by humanshield on Aug 31, 2016 9:59:49 GMT -5
Since increasing the CC's is not an option for me, I'm thinking about the A9 cam now. I need to find other ways to get better performance. How significant will the difference be? On my scooter, the difference was as impressive as the 50mm BBK. Some say they didn't notice any difference. Maybe they got a fake? My scooter is pretty quick for an 83cc 4T daily commuter.
|
|
phatmanxxl
Scoot Enthusiast
Posts: 484
Location: Missoura
|
Post by phatmanxxl on Aug 31, 2016 14:40:43 GMT -5
Since increasing the CC's is not an option for me, I'm thinking about the A9 cam now. I need to find other ways to get better performance. How significant will the difference be? On my scooter, the difference was as impressive as the 50mm BBK. Some say they didn't notice any difference. Maybe they got a fake? My scooter is pretty quick for an 83cc 4T daily commuter. Recommend one? Which one did you get and from where?
|
|
pgmomni
Scoot Newb
Black and Red 2014 TaoTao 50's
Posts: 2
|
Post by pgmomni on Sept 14, 2016 18:50:46 GMT -5
Has anyone experimented with a crankshaft? I haven't messed with a crankshaft in my scoots, but a stroker crank will deliver more torque (I found that out in a '69 Dodge Super Bee 440ci V8 that I had, wish I still had it). It also should increase the compression ratio so premium fuel is a must. Acceleration would improve, but won't give you any more top end speed. For my money, the best gains I've had with a stock 4t were unsealing and tuning the carb with bigger jets, and tuning the CVT (also the cheapest ways to get more power).
|
|
pgmomni
Scoot Newb
Black and Red 2014 TaoTao 50's
Posts: 2
|
Post by pgmomni on Sept 14, 2016 19:02:05 GMT -5
Pardon my newbie ignorance. Is my 2014 TaoTao50 a 4T?
From your sig i was reading your mods. 2013 DongFang Sunny DF50STE 4T; Blue clutch springs & stock Contra spring, 5 Gram rollers, Bando 669x18x30 belt, Manual fuel petcock
I eliminated the vacuum regulated petcock as it seemed to make the scoot hard to start. We have lots of hills and need higher RPMs and torque in the mid-range.
The way our current TT50's cvt works sucks. From a stand still you give it the throttle and it takes off well with RPM surge but once the CVT moves to a higher ratio it bogs down the motor. Not a smooth, powerband transition at all.
From reading threads for reliability stay with stock variator but change to 5 gram rollers and blue clutch springs to add some low end RPM/Torque. Which Carb is just a good bolt on with the proper jets already in it?
Tks for your help.
Pete
|
|
|
Post by 190mech on Sept 14, 2016 19:15:41 GMT -5
OK,I dug a hole and crawled under the barbed wire fence to suggest getting a Harbor Freight MIG welder and installing a 2T engine to vastly increase performance,,now gotta find that hole I dug,its dark and my flashlight is getting dim!!
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Sept 14, 2016 19:24:35 GMT -5
Since increasing the CC's is not an option for me, I'm thinking about the A9 cam now. I need to find other ways to get better performance. How significant will the difference be? On my scooter, the difference was as impressive as the 50mm BBK. Some say they didn't notice any difference. Maybe they got a fake? My scooter is pretty quick for an 83cc 4T daily commuter. Ah, but here is the question...did you add the cam to a scoot with the BBK installed already? Or, will just adding the cam alone make such a big difference? See what I am getting at? Will my stock bore 49cc really wake up with a real A-9 cam or are the effects really a result of the cam and the big bore working in concert? Bill
|
|
larrball
Scoot Enthusiast
2016 Genuine Scooter Rough House Sport Ti
Posts: 295
|
Post by larrball on Sept 14, 2016 19:48:54 GMT -5
Nothing wrong with a small 90amp (115 volt)flex-core/Mig welder for small projects. I welded for 15 years in the power industry (col/nuke/chem) you just have to tolerate the %20 duty cycle.
sorry off topic -- my bad.
|
|
|
Post by dan50 on Sept 15, 2016 4:42:26 GMT -5
Pardon my newbie ignorance. Is my 2014 TaoTao50 a 4T? From your sig i was reading your mods. 2013 DongFang Sunny DF50STE 4T; Blue clutch springs & stock Contra spring, 5 Gram rollers, Bando 669x18x30 belt, Manual fuel petcock I eliminated the vacuum regulated petcock as it seemed to make the scoot hard to start. We have lots of hills and need higher RPMs and torque in the mid-range. The way our current TT50's cvt works sucks. From a stand still you give it the throttle and it takes off well with RPM surge but once the CVT moves to a higher ratio it bogs down the motor. Not a smooth, powerband transition at all. From reading threads for reliability stay with stock variator but change to 5 gram rollers and blue clutch springs to add some low end RPM/Torque. Which Carb is just a good bolt on with the proper jets already in it? Tks for your help. Pete The best gain I got was with the 5 gram rollers. I'm looking to hold the variator open until over 25mph (it is always windy where I live). I have since installed a Mitsuboshi brand 681x17.7x30 belt (the Bando belt was too short and robbing me of top end, This might not be a problem for you as 669x18x30 is the correct size for the shortcase 4t's). I just put my 1k (blue) contra spring back in. The combination of the stiffer contra (blue-1k) and 5 gram rollers keeps the variator open longer (23mph) and a smooth transition when fully open, no drop in RPM's and no noticeable bogging . My variator used to fully open at 14 to 15 MPH and the engine bogged down and really had to work to accelerate. The blue clutch springs have nothing to do with the variator or powerband of the engine. The stiffer clutch springs make the clurch grab at a higher RPM than the stock springs. This is for a performance launch from a stop. I
|
|
|
Post by stoneforth on Sept 15, 2016 17:42:24 GMT -5
I'm jealous. All I had was a 73' Barracuda with a 340 4 barrel, 904 Tranny, 3.73 rear. And a 74' Duster with a 318 3 speed, still went like a bat out of hell. Love them Mopars!! So easy to work on. My very first engine rebuild was the 340 I put in my Barracuda. Came stock with a 318. I bought a 318 in parts last year for about $100 after previous owner spent hundreds on crack testing. Not sure what made me buy it. it'll be a nice project if i ever have a machine shop.
|
|