Layzboy Posted November 7, 2013 Report Share Posted November 7, 2013 whats up i hvae a 240whp hayabusa drag bike and i was wondering what a 620 weighs stock and what your thoughts were on doing this swap if the numbers weigh out correctly this swap will be done im going to be removing gas tank lightening up a lot of suspension components removing the heavy motor and trany to replace with my 150lb motor and tranny my ultimate goal is to have a sleeper datsun cleaan pickup that gets good gas mileage and i can still daily motor made 240whp and 170tq so its more than enough to push this 1 Quote Link to comment
laotsu Posted November 7, 2013 Report Share Posted November 7, 2013 would the engine be able to handle a truck's rear-end? I've seen the smart car hayabusa but those things are little more that bikes themselves. Quote Link to comment
Layzboy Posted November 7, 2013 Author Report Share Posted November 7, 2013 i could of sworn the 620 wasnt that heavy from the factory im sure the busa motor can handle the rearend it makes waay more power and torque than the stock motor Quote Link to comment
dr.feltersnatch Posted November 7, 2013 Report Share Posted November 7, 2013 How much hp is the busa stock? Like 150-170 something like that. To bump it up to 240 I am sure you had to do some decent work to it, and if it was built as a drag bike its street manners I would assume have changed. It will take a lot more clutch slippage to get a couple thousand pounds moving rather than a couple hundred. I think it would he a blast but not sure about longevity or streetability. It would be fun to spin 14000 rpms in a 620 though! Quote Link to comment
datsunaholic Posted November 7, 2013 Report Share Posted November 7, 2013 Biggest problem I see is that bike engines make their power at totally different RPM levels than car engines. Might find that it's entirely undriveable. 1 Quote Link to comment
dr.feltersnatch Posted November 7, 2013 Report Share Posted November 7, 2013 I wouldn't say un driveable, I would say un streetable. I would drive the shit out of it at high rpms and spinning tires! Just wouldn't want to drive it in traffic with a cop behind you. Quote Link to comment
Layzboy Posted November 7, 2013 Author Report Share Posted November 7, 2013 well im gonna try and cut off a ton of weight by using only necessary parts i mean where does most of the weight come from chassis wise i know the motor and trans is prob around 500lbs the rearend doesnt weigh much so is it the frame? or is a 620 unibody? Quote Link to comment
Layzboy Posted November 7, 2013 Author Report Share Posted November 7, 2013 the motor makes about 170ish torque from 3k to redline Quote Link to comment
K_trip Posted November 7, 2013 Report Share Posted November 7, 2013 - removed - Quote Link to comment
Layzboy Posted November 7, 2013 Author Report Share Posted November 7, 2013 its cammed has a power commander and a tuneand exhaust and other random nik naks lol Quote Link to comment
]2eDeYe Posted November 7, 2013 Report Share Posted November 7, 2013 Kingcab is 2750 lbs, plenty light :cool: Quote Link to comment
datzenmike Posted November 7, 2013 Report Share Posted November 7, 2013 Forget it. Your truck weighs 5 times (at least) what your bike does. Displacement is what makes low speed torque. To an extent you can multiply that with a differential but the 620 is only 4.375. You would want something double that just to get it moving. All the HP in the world is meaningless if it's at 15K. This was brought up long ago at NWDE. Quote Link to comment
ggzilla Posted November 7, 2013 Report Share Posted November 7, 2013 Right It needs torque. At least 110 ft lbs. Quote Link to comment
datzenmike Posted November 7, 2013 Report Share Posted November 7, 2013 This will be a race horse pulling a wagon. If you have to do this get a 210 or a 1200 something below a ton. Remove the engine and transmission weight and get the largest ratio rear end you can find.... even then.... What is the gear ratio in first and the rear sprocket? In other words how many motor turns to turn the rear wheel once? For now imagine you bike with 4 more bikes stacked on it and trying to take off from a standing start. Now try to imagine starting in 3rd or 4th gear. 1 Quote Link to comment
K_trip Posted November 7, 2013 Report Share Posted November 7, 2013 - removed - Quote Link to comment
datzenmike Posted November 7, 2013 Report Share Posted November 7, 2013 What grief? what abuse? No one said idiotic or stupid idea. What does that samurai weigh and bet it has a 5.98 diff in it not to mention a 2 to one trans case. Apples and oranges. A 620 will weigh a lot more than that. You'll have to slip the clutch for half a block to get going. Quote Link to comment
datsunaholic Posted November 7, 2013 Report Share Posted November 7, 2013 Or, do like NASCAR does and spin the tires for 50 feet to get going. NASCAR engines produce around 900HP... and stall pulling out of the pits unless you have them revved over 5K. All the power is at the top. Getting moving from a dead stop without burning clutches and/or tires is a measure of how much torque you have at 1000-1500 RPM. Quote Link to comment
K_trip Posted November 8, 2013 Report Share Posted November 8, 2013 - removed - Quote Link to comment
laotsu Posted November 8, 2013 Report Share Posted November 8, 2013 just to make everyone happy YOUR IDEA SUCKS! IT WILL NEVER BE STREET WORTHY< JUST RIDE THE BIKE AND DRIVE THE TRUCK. BETTER THAT THAN TO START ANOTHER PROJECT THAT WILL NEVER BE FINISHED. there now K-trip can say "I told you so". :poke: Quote Link to comment
datzenmike Posted November 8, 2013 Report Share Posted November 8, 2013 It's a truck so everything will be heavy duty including the 10" brakes. Had a 3,500 pound Plymouth Fury with a 383 that had 10" brakes. This would be difficult in a car. Cutting the frame is ill advised and one way. When this doesn't work the truck will be scrap. Start with a 1200 or B-210 something under 2,000 to begin with. Gas mileage is directly proportional to weight. Takes a finite amount of gas energy to move a vehicle through wind resistance and lift up hills. A smaller engine will have to work harder but use the same amount of gas as a larger one to do the same work. Quote Link to comment
bananahamuck Posted November 8, 2013 Report Share Posted November 8, 2013 Honda beat you to the idea a while ago.. Dude is hauling ass YO 1 Quote Link to comment
Layzboy Posted November 8, 2013 Author Report Share Posted November 8, 2013 like i said the motor made 170 ftlbs of torqu from 3k to redline im sure thats enough Quote Link to comment
datzenmike Posted November 8, 2013 Report Share Posted November 8, 2013 Hmmm wonder if it weighs 1,200 pounds? Quote Link to comment
SlottedMagz Posted November 8, 2013 Report Share Posted November 8, 2013 I personally love this idea, and if you end up doing it i want to see/help. And as to weight issues if you have the money resources/money couldn't you go tubular chassis and lighten it that way? Quote Link to comment
Layzboy Posted November 8, 2013 Author Report Share Posted November 8, 2013 im going to go tube chassis if i have to i just need to get it near the 1200 lb range Quote Link to comment
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