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| wormus 2852 posts 38 months | Monday 22nd June 2009  Bonnie and Clyde said: Just wondered Wormus, at any stage in your past has a female told you that your penis is particularly small????????? Just wondered  Only the once, but she had a HUGE fanny! Bonnie and Clyde said: Anyway i cant wait till the 4th July  I think theres loads of us waiting to see "Daddy's rocket car" kick everyones asses See you there  I never said I'd be good at drag racing, in fact I'd wager I would be terrible! Edited by wormus on Monday 22 June 15:55 | |
| robkarloff 213 posts 38 months | Monday 22nd June 2009 stevieturbo said: I just chose the biggest blower available at the time, that would fit easily. Its easier to pulley down, than it is to make a small blower pump more air. A bigger blower under-driven is not necessarily a good thing either. You lose lots of volumetric efficiency doing this. So mid to low range won't be that great, and for any street driver this is where you'll spend most of your running time... The only way to do it is the right way, size and spec for your intended output. If you later want to up the stakes, you'll get the guts of your outlay selling on what you have, and it will go towards something bigger. There's a reason I went for a 6/71 with 11%OD on my 383 rather than an 8/71 with underdrive... Edited by robkarloff on Monday 22 June 14:27 | |
| wormus 2852 posts 38 months | Monday 22nd June 2009 robkarloff said: stevieturbo said: I just chose the biggest blower available at the time, that would fit easily. Its easier to pulley down, than it is to make a small blower pump more air. A bigger blower under-driven is not necessarily a good thing either. You lose lots of volumetric efficiency doing this. So mid to low range won't be that great, and for any street driver this is where you'll spend most of your running time... The only way to do it is the right way, size and spec for your intended output. If you later want to up the stakes, you'll get the guts of your outlay selling on what you have, and it will go towards something bigger. There's a reason I went for a 6/71 with 11%OD on my 383 rather than an 8/71 with underdrive... Edited by robkarloff on Monday 22 June 14:27 Yes, somebody once said: "Run the smallest supercharger that will provide your target boost level. It will be more responsive (make boost sooner) and will require less horsepower to drive" | |
| ringram 7609 posts 83 months | Monday 22nd June 2009 Baby Jesus supercharges my car with 1Bar pressure
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| S600VXR 3325 posts 35 months | Monday 22nd June 2009 ringram said:
Baby Jesus supercharges my car with 1Bar pressure  | |
| MyM8V8 3759 posts 30 months | Monday 22nd June 2009 ringram said:
Baby Jesus supercharges my car with 1Bar pressure Give or take a few millibars, anyway. I take it you mean that SC's are the devils work! | |
| wormus 2852 posts 38 months | Monday 22nd June 2009 I think a little MP1900 TVS running say 6lbs boost would put a big smile on Richard's face. At that level it wouldn't sap hardly any power and make the most out of those heads for a solid 600whp! Go on try it, you'll giggle like a girl. If you didn't like it you could take it off and sell it. What's to lose? Edited by wormus on Monday 22 June 16:56 | |
| MyM8V8 3759 posts 30 months | Monday 22nd June 2009 wormus said:
I think a little MP1900 TVS running say 6lbs boost would put a big smile on Richard's face. At that level it wouldn't sap hardly any power and make the most out of those heads for a solid 600whp! Go on try it, you'll giggle like a girl. Don' think he needs one. He can light the tyres in 2nd and third as it is. Anyway I think he wants to go the heaven not the other place! If you didn't like it you could take it off and sell it. What's to lose? Edited by wormus on Monday 22 June 16:56
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| wormus 2852 posts 38 months | Monday 22nd June 2009 MyM8V8 said: Don't think he needs one. He can light the tyres in 2nd and third as it is. What's he running, Chen Shin bakelite remoulds? Edited by wormus on Monday 22 June 17:11 | Advertisement |
| ringram 7609 posts 83 months | Monday 22nd June 2009 Yeah, I showed Terry who collected the evil engine cover how the first 3 gears lacked some traction. I tried not to be too mental. He seemed happy chatting away during the process.
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| wormus 2852 posts 38 months | Monday 22nd June 2009 I forgot about this too: http://videos.streetfire.net/video/95 No it's not on Vixpy's dyno so strictly speaking it doesn't count Edited by wormus on Monday 22 June 17:34 | |
| robkarloff 213 posts 38 months | Monday 22nd June 2009 wormus said: MyM8V8 said: Don't think he needs one. He can light the tyres in 2nd and third as it is. What's he running, Chen Shin bakelite remoulds? Edited by wormus on Monday 22 June 17:11 No, he's a canny chap so I'd guess they'll be Hwa Fong long-lifes...  | |
| robkarloff 213 posts 38 months | Monday 22nd June 2009 wormus said: I forgot about this too: http://videos.streetfire.net/video/95 No it's not on Vixpy's dyno so strictly speaking it doesn't count Edited by wormus on Monday 22 June 17:34 What?! What is this crazy device that you remove the engine from the car and bolt it to directly...?!! You'll be telling me that it's the most accurate way of measuring your engine's output next... Heathen! | |
| TerryS 1216 posts 83 months | Monday 22nd June 2009 ringram said: Yeah, I showed Terry who collected the evil engine cover how the first 3 gears lacked some traction. I tried not to be too mental. He seemed happy chatting away during the process. LOL it went well enough  | |
| stevieturbo 5108 posts 82 months | Monday 22nd June 2009 wormus said:
robkarloff said:
stevieturbo said:
I just chose the biggest blower available at the time, that would fit easily. Its easier to pulley down, than it is to make a small blower pump more air. A bigger blower under-driven is not necessarily a good thing either. You lose lots of volumetric efficiency doing this. So mid to low range won't be that great, and for any street driver this is where you'll spend most of your running time...The only way to do it is the right way, size and spec for your intended output. If you later want to up the stakes, you'll get the guts of your outlay selling on what you have, and it will go towards something bigger. There's a reason I went for a 6/71 with 11%OD on my 383 rather than an 8/71 with underdrive... Edited by robkarloff on Monday 22 June 14:27
And the argument about a smaller blower being more responsive. Perhaps with a turbo yes. Im not convinced the same really is true with superchargers unless its a crazy extreme. Even when I used my blower on a standard 5.7, the gains everywhere were fantastic. It did feel great ( at the time ) | |
| wormus 2852 posts 38 months | Monday 22nd June 2009 stevieturbo said: Well...if anyone said use the smallest SC that will provide the target boost, no offense, he shouldnt be tuning cars. It was a quote from some bloke called Jerry Magnuson. | |
| stevieturbo 5108 posts 82 months | Monday 22nd June 2009 wormus said:
stevieturbo said:
Well...if anyone said use the smallest SC that will provide the target boost, no offense, he shouldnt be tuning cars. It was a quote from some bloke called Jerry Magnuson.But that statement makes him sound like he doesnt. Boost is never a target when building/tuning an engine....power goals perhaps are. | |
| ringram 7609 posts 83 months | Monday 22nd June 2009 stevieturbo said:
Boost is never a target when building/tuning an engine....power goals perhaps are.  | |
| robkarloff 213 posts 38 months | Monday 22nd June 2009 stevieturbo said: wormus said: stevieturbo said: Well...if anyone said use the smallest SC that will provide the target boost, no offense, he shouldnt be tuning cars. It was a quote from some bloke called Jerry Magnuson. Then he seriously needs to rephrase it, or make better use of English. as I would assume he does know what he is talking about. But that statement makes him sound like he doesnt. Boost is never a target when building/tuning an engine....power goals perhaps are. It's basically down to rotor-to-case losses, only in traditional roots designs. The bigger the blower the more lobe-to-case area there is and the higher potential for air leakage past the lobes at lower RPMs. Hence a smaller blower spun faster in this operating range will be more effective and more efficient and move a greater volume of air. Just like in the turbo world, there is significant overlap in the air delivery capabilities of a particular series of supercharger unit, so ultimately what should influence your choice should be your individual requirement and engine primary operating load/speed range. Magnusson's basic point is correct, that on a street driven vehicle you should err on the small side for the best all round characteristics. If you're building a track-only screamer which will spend it's time on full chat then you size to the bigger end because you want minimal flat-out restriction and are not bothered about part-throttle or mid-range engine response. I would guess that the reason he even mentions boost is that unfortunately it's the only thing the layperson customer understands or is aware of. I also seem to remember Mike Kuhl making a similar statement in his tech articles, unfortunately the Kuhl Superchargers site is no more. | |
| stevieturbo 5108 posts 82 months | Monday 22nd June 2009 Obviously someone sellng superchargers, would like people to err on the side of caution, and opt for the smaller unit.
They know all too well...once you get a taste, you will want more. And then have to bo and buy the bigger unit. Sound advice.....2 sales. Has this happened to many people do you think ? Not a dig by the way. But it does happen, all over the world. If those people had went big to start with..at least they might have saved themselves some money in the long term. Ive had one supercharger for about 5 years now....and its a very flexible unit. Its worked perfectly on a std 5.7, right through to what I have now. With this instance, you cant compare turbos, as the two operate so differently. Turbos in some ways are more flexible...and in others less so. | |
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