LONG: Faster revs, not more revs...

[Slammed96]

guessing with hydraulic rollers it should be fine, seeing as the rpm will never be astronomical.

but because this is a theory based thread, I have an idea for a retrofit that may help with the windup and certainly help with power. I was talking to a friend the other day about a turbo-esq setup that is linked to the snout of the crank via gear drive and uses the same principals as a turbo, but instead of making boost it aids in spinning the crank. This way you gain back much power lost by friction and parasitic drag caused by accessories. I have also heard of this setup simultaneously running a supercharger as well. Though I have never seen it put to use on a vehicle or standard V block engine, I know it was used on some WWII era radial engine planes. I think it would be interesting to see if and how it would work for a street or race application.

[Lincolnman]

I was talking to a friend the other day about a turbo-esq setup that is linked to the snout of the crank via gear drive and uses the same principals as a turbo, but instead of making boost it aids in spinning the crank. This way you gain back much power lost by friction and parasitic drag caused by accessories. I have also heard of this setup simultaneously running a supercharger as well. Though I have never seen it put to use on a vehicle or standard V block engine, I know it was used on some WWII era radial engine planes. I think it would be interesting to see if and how it would work for a street or race application.

Cool concept - I would not have thought of it.

[Slammed96]

Cool concept - I would not have thought of it.

its one of those things that really only makes sense after you hear it from another person, I can honestly say I would never have thought of it either. Someday I would really like to see it tried out, or possibly fab something up for myself to get it to work...also sorry to kinda get fixed on a tangent, I just have alot of interest in this haha

[Lincolnman]

... I was talking to a friend the other day about a turbo-esq setup that is linked to the snout of the crank via gear drive and uses the same principals as a turbo, but instead of making boost it aids in spinning the crank.

Just a side thought on this, how does one make it work considering the RPM of a turbo? Are we talking about a turbo running what would basically amount to an air to air torque converter or what? I don't imagine that you could run gears and get proper oiling, and a chain or belt would disintegrate.

Wow, really? You have to be pulling my leg? How much juice do you think it takes to draw down a vacuum? Less than running your a factory car stereo. I'm telling you no parasitic losses on this. I'll make it really simple ... you should see gains of 10-15rwhp with this addition. No parasitic losses.

I was not suggesting that it was a bad idea, just that it MIGHT have some trade off. No, I am not pulling your leg. I know that there will be parasitic loss, and it ought to be more so even then if a person ran a vacuum pump directly as an accessory, because the conversion from mechanical to electric and back to mechanical would lead to significant losses not found in a mechanical to mechanical conversion. I might be missing something there like the losses from the alternator creating the electricity and the electric pump COULD be more efficient (pending mechanical pump option) but it seems illogical. ALL THAT SAID - I do believe that it makes more power, but as more power was not the end goal here, faster RPM were, I am not sure it fits. That being said I would probably do it (in a real world situation) anyway, because I do believe that the marginal losses would be FAR AND AWAY outweighed by the overall performance increase.
It just didn't fit the mold of this question perfectly, that's all.

If you're worried about something as small as a vac pump, better unhook the headlights, radio, and pretty much anything else.

Who said anything about those being on anything (or even existing relative to this) at all? I don't recall saying that this was going to be installed in my daily driver. Not to be a jerk, but it was not what I had asked about.

New thought - what about chain driven accessories? Chains are considerably more efficient than a rubber belt...

[cjriojas]

Lincoln, did you get my pm?

[pl4yboy]

Who said anything about those being on anything (or even existing relative to this) at all? I don't recall saying that this was going to be installed in my daily driver. Not to be a jerk, but it was not what I had asked about.

New thought - what about chain driven accessories? Chains are considerably more efficient than a rubber belt...

I just thought you should take everything into account. I assume when building a motor (especially when you specify LS platform) that it will go in to something. If the motor was going into something, I would assume it would have electronics of sorts. Headlights are a must if you plan on driving it at night. The majority of vehicles have a stereo (Hell my Polaris Ranger has a stereo). Just food for thought. No need to get your panties in a bunch.

[cjriojas]

I assumed this is a concept engine for some type of competition go-kart, not a vehicle driven on any road. The SAE organizations have minimal amounts of electronics: starter, alternator, battery. Lincoln, you never specified the application for the motor. What is it for?

[Lincolnman]

Lincoln, did you get my pm?

No. No I didn't.

I just thought you should take everything into account. I assume when building a motor (especially when you specify LS platform) that it will go in to something. If the motor was going into something, I would assume it would have electronics of sorts. Headlights are a must if you plan on driving it at night. The majority of vehicles have a stereo (Hell my Polaris Ranger has a stereo). Just food for thought. No need to get your panties in a bunch.

No bunching, just saying. Your assumptions are safe ones, but I was worried about things getting off on a tangent and eventually degrading into a thread-jacking. Hence I wanted to stay on point.

I assumed this is a concept engine for some type of competition go-kart, not a vehicle driven on any road. The SAE organizations have minimal amounts of electronics: starter, alternator, battery. Lincoln, you never specified the application for the motor. What is it for?

That's why I said theoretical, so people's minds would not be clouded by application data. Yes, a competition cart is the closest practical application to what I was thinking.