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Increasing Piston Stroke

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  #111  
Old 01-20-2009 | 03:48 AM
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Default RE: Increasing Piston Stroke

To increase power (hp, kw etc) at X rpm you need to increase torque (force) at X rpm. If you cannot increase peak torque, then you can increase power by increasing the rpm at which peak torque is produced, and thus do more work such as accelerate a car faster over a given distance in a given time.

You can have all the torque in the world and still have poor power, or even no power at all (in which case nothing happens no matter what torque exists). Power is what's needed because power is a measure of actual work, whereas torque is only a measure of force, and you can have force when zero work is being done, e.g. the torque that exists in an anti roll bar when the car is sitting on uneven ground, or the torque that exists in a bolt when you hold the wrench with X force, but the bolt isn't turning.

Power is often quoted as being "torque X rpm", but this is an arbitrary measure. It's really torque X time, i.e. how much force is being produced in X time period (note the 'm' in rpm).

I'm not meaning to be critical of you (or put you down in any way), it's just that what you say gives the impression that you don't understand the basics...
 
  #112  
Old 01-20-2009 | 09:09 AM
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Default RE: Increasing Piston Stroke

I'm not meaning to be critical of you (or put you down in any way), it's just that what you say gives the impression that you don't understand the basics...
^x2
 
  #113  
Old 01-20-2009 | 12:22 PM
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Default RE: Increasing Piston Stroke

ORIGINAL: falkore24

... Horsepower is not real, torque at the output shaft of the engine is.
HP is just as real as torque. To re-phrase someone who got it WRONG, HORSEPOWERis what moves the car, not torque.

To illustrate, I can make 700 lbf*ft of torque with my BARE HANDS. All I need is a long wrench. That wont move the car very fast, because I can only make that torque at about 0.5 RPM.
 
  #114  
Old 01-20-2009 | 03:04 PM
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Default RE: Increasing Piston Stroke

Ok, perhaps a bad choice of wording. Torque and rpm are measurable, HP is derived. Put 8 different torque wrenches on a bolt and they will read about the same. Try that with different brand dynos and you wont get the same type of results.

I know that you fully understand all of this Jim, just my $0.02.
 
  #115  
Old 01-20-2009 | 04:53 PM
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Default RE: Increasing Piston Stroke

thank you at least you get what im saying now and my bad for not wording it right in the first place. but johnL i gotcha.... now as for the question stated above...does anyone have any answers??

im actually just asking if there are more ways and if so what are they and what are the nominal increases that you all have seen or heard of
 
  #116  
Old 01-20-2009 | 06:27 PM
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Default RE: Increasing Piston Stroke

Everyone has told you any and every which way to increase HP and TQ. What else are you looking for here?

Yes your auto can have a camshaft, how do you think it runs? You REALLY need to educate yourself more.
 
  #117  
Old 01-20-2009 | 06:33 PM
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Default RE: Increasing Piston Stroke

Nitrous - Whatever gain you want, but a 50% increase over stock is generally accepted as a safe maximum. Controls are the main factor in system safety. On top of the basic wet system, you should have a window + WOT switch for activation, bottle heater with high pressure cutoff, bottle blanket, purge and a remote opener. Also N2O pressure gauge. Even better would be a low pressure de-activation on the nitrous, but if you spray and there's no juice, you'll know it!

Supercharger - It would have to be custom. On my tC, the TRD SC would give me 40 HP peak and is a total POS.

Turbo - You could probably get to about 200-230 HP at the wheels before needing internal work ..... say 8 psi. Turbos are an expensive system to build.
 
  #118  
Old 01-20-2009 | 08:08 PM
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Default RE: Increasing Piston Stroke

thanks falkore so aside from everything i named up above plus the camshaft (thnx currantkord) thats pretty much all you can do increase power right??..not about how many mods there are but about the few mods and what the outcome of those mods are....got it.....to me the nitrous sounds a bit dangerous...just a bit...think ill go with the upgraded camshaft of course and probably in the long run maybe even a turbo...seems like the logical thing to do...
 
  #119  
Old 01-20-2009 | 08:31 PM
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Default RE: Increasing Piston Stroke

Heres a suggestion..

Get a used/blown Motor,weather it be H22,H23,XYZ. And have at it.
 
  #120  
Old 01-21-2009 | 01:08 AM
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Default RE: Increasing Piston Stroke

lol yea thats what alot of people told me...just buy another honda maybe civic or older model accord and just experiment..lol...one guy has a camaro small block 305...hes like you could put one of these in your car....with some welding and converting to RWD im like wow...umm you make that sound so easy..lol...

final question though....as for the h22 head and f23 body...do you think i could just buy the head and have someone hook it up?? get some gains there huh?? just not as much as the full h22 engine
 



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