Unorthodox racing pulleys: Pros and Cons
#81
#82
No. I Had a shop do it (along with piston and con rod work). (this isnt something you can do yourself unless you own a machine shop, and even then you probably wouldnt have the correct equipment to do it properly)
#83
Waiting on my pistons to come in (Wiseco- had best price) and then will have the bottom end done up. Knife edge worth it?
#85
#87
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No Josh, it was nothing personal...just saying that the sales tactic worked on me and I paid the full 200 bucks, which I almost NEVER do for a mod. I'm not saying that there will eventually NOT be any left...I know that will happen.
But don't ignore the other 20 posts in this thread where I mention that I don't regret my decision to purchase the crank pulley and I definitely don't regret my decision to purchase it from you and support a forum vendor!
Great service, got to my house quickly etc. No complaints from me.
But don't ignore the other 20 posts in this thread where I mention that I don't regret my decision to purchase the crank pulley and I definitely don't regret my decision to purchase it from you and support a forum vendor!
Great service, got to my house quickly etc. No complaints from me.
To "Josh", Ive seen you say "these won't be produced anymore. This is the last batch. I have the only ones" a few times myself. It's definitely a 'tactic' as rockstar said but nobody ever said anything insulting about you. It's more or less a conversation about what's commonly noticed. No hard feelings on my end. Just bringing clarity on my responses about the 'tactic'.
#88
thats good. Hopefully he has done it before and knows how to balance a crank
#89
#92
32hp my assholio. I'd believe you ONLY if you first showed dyno results of a big block V8 producing these kinds of numbers! Are you speaking in terms of crank lightening/knife edging only or in conjunction with balancing the lower end components as well....that MIGHT a little feasible.
#93
32hp my assholio. I'd believe you ONLY if you first showed dyno results of a big block V8 producing these kinds of numbers! Are you speaking in terms of crank lightening/knife edging only or in conjunction with balancing the lower end components as well....that MIGHT a little feasible.
Also you would potentially see more gains on smaller higher reving motors than a big block. How do you thing F1 cars achieve 18K plus rev limits and 850+ horse power on small 2.4 liter V8s on regular pump gas naturally aspirated? It comes down to reducing as much mass as possible for starters (they weigh in at 210 lbs).
#95
I gotta say though, 32HP is insane. Why wouldn't they do that from the factory? My first guess is cost, but maybe there is also a downside? Reduced durability? Thus, my two questions I asked in my last post.
#97
Nah, he just questioning to learn. Plus, Fatty don't care about stuff like that.
I gotta say though, 32HP is insane. Why wouldn't they do that from the factory? My first guess is cost, but maybe there is also a downside? Reduced durability? Thus, my two questions I asked in my last post.
I gotta say though, 32HP is insane. Why wouldn't they do that from the factory? My first guess is cost, but maybe there is also a downside? Reduced durability? Thus, my two questions I asked in my last post.
#98
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Well, that much, I KNOW is very doable.
Fasttyms, have you read up on gerzands build?! He had a cammed 3.2...then upgraded to a full type s and transferred a lot of his knowledge to it...I want to say he was at 400 N/A (or close to it). I apologize for the lack of specifics but PM him and see where he's at...probably same path you're on.
Fasttyms, have you read up on gerzands build?! He had a cammed 3.2...then upgraded to a full type s and transferred a lot of his knowledge to it...I want to say he was at 400 N/A (or close to it). I apologize for the lack of specifics but PM him and see where he's at...probably same path you're on.
#100
Well, that much, I KNOW is very doable.
Fasttyms, have you read up on gerzands build?! He had a cammed 3.2...then upgraded to a full type s and transferred a lot of his knowledge to it...I want to say he was at 400 N/A (or close to it). I apologize for the lack of specifics but PM him and see where he's at...probably same path you're on.
Fasttyms, have you read up on gerzands build?! He had a cammed 3.2...then upgraded to a full type s and transferred a lot of his knowledge to it...I want to say he was at 400 N/A (or close to it). I apologize for the lack of specifics but PM him and see where he's at...probably same path you're on.
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civicdrivr (06-28-2012)
#101
Is that a civic crank? That aint no v6 or v8 or f1
A 4 cylinder crank has 8 big counterweights and is a flat crank making it easier to balance once the weight is taken off, v6 only has 4 and is not flat, you won't be able to shave off enough to make a difference. You'll get very minimal gains and they will be at 7000rpm+. This kind of mod is used on engines the live in the +7000rpm range. You usually won't see it on big v8's because taking that much off means you need to add weights just to balance it.
The "knife" part of the crank doesn't actually cut through the oil. The leading edge cuts through, the knife part just follows it. Imagine trying to push a v-hull boat through the water ass end first. and it doesn't cut through oil, it's spinning through oil vapor. The best thing you can do is to reshape the leading and trailing edge to a more aerodynamic shape to reduce the drag, add a windage tray or screen, add a crank scraper and/or add a vacuum pump.
The reason why Honda didn't do it. Cost, hard to balance, hard to dampen vibrations and harmonics. The heavier rotating mass, crank, flywheel and pulley, absorbs and stores more energy making the engine feel more smoother and getting better gas mileage.
A 4 cylinder crank has 8 big counterweights and is a flat crank making it easier to balance once the weight is taken off, v6 only has 4 and is not flat, you won't be able to shave off enough to make a difference. You'll get very minimal gains and they will be at 7000rpm+. This kind of mod is used on engines the live in the +7000rpm range. You usually won't see it on big v8's because taking that much off means you need to add weights just to balance it.
The "knife" part of the crank doesn't actually cut through the oil. The leading edge cuts through, the knife part just follows it. Imagine trying to push a v-hull boat through the water ass end first. and it doesn't cut through oil, it's spinning through oil vapor. The best thing you can do is to reshape the leading and trailing edge to a more aerodynamic shape to reduce the drag, add a windage tray or screen, add a crank scraper and/or add a vacuum pump.
The reason why Honda didn't do it. Cost, hard to balance, hard to dampen vibrations and harmonics. The heavier rotating mass, crank, flywheel and pulley, absorbs and stores more energy making the engine feel more smoother and getting better gas mileage.
The following users liked this post:
civicdrivr (06-28-2012)
#102
Is that a civic crank? That aint no v6 or v8 or f1
A 4 cylinder crank has 8 big counterweights and is a flat crank making it easier to balance once the weight is taken off, v6 only has 4 and is not flat, you won't be able to shave off enough to make a difference. You'll get very minimal gains and they will be at 7000rpm+. This kind of mod is used on engines the live in the +7000rpm range. You usually won't see it on big v8's because taking that much off means you need to add weights just to balance it.
The "knife" part of the crank doesn't actually cut through the oil. The leading edge cuts through, the knife part just follows it. Imagine trying to push a v-hull boat through the water ass end first. and it doesn't cut through oil, it's spinning through oil vapor. The best thing you can do is to reshape the leading and trailing edge to a more aerodynamic shape to reduce the drag, add a windage tray or screen, add a crank scraper and/or add a vacuum pump.
The reason why Honda didn't do it. Cost, hard to balance, hard to dampen vibrations and harmonics. The heavier rotating mass, crank, flywheel and pulley, absorbs and stores more energy making the engine feel more smoother and getting better gas mileage.
A 4 cylinder crank has 8 big counterweights and is a flat crank making it easier to balance once the weight is taken off, v6 only has 4 and is not flat, you won't be able to shave off enough to make a difference. You'll get very minimal gains and they will be at 7000rpm+. This kind of mod is used on engines the live in the +7000rpm range. You usually won't see it on big v8's because taking that much off means you need to add weights just to balance it.
The "knife" part of the crank doesn't actually cut through the oil. The leading edge cuts through, the knife part just follows it. Imagine trying to push a v-hull boat through the water ass end first. and it doesn't cut through oil, it's spinning through oil vapor. The best thing you can do is to reshape the leading and trailing edge to a more aerodynamic shape to reduce the drag, add a windage tray or screen, add a crank scraper and/or add a vacuum pump.
The reason why Honda didn't do it. Cost, hard to balance, hard to dampen vibrations and harmonics. The heavier rotating mass, crank, flywheel and pulley, absorbs and stores more energy making the engine feel more smoother and getting better gas mileage.
I agree to a point on your info, The knife edge would cut thru the oil IF there wasnt a windage tray in the way. And the best actual shape would be more of a rounded shape (like the leading edge in your pic) as it would produce less drag. Im not concerned about it as we have a windage tray. Im solely looking at it as a weight reduction (i had one crank done already that was able to get 7lbs taken off and balanced, current one is a little less). My motor will spend a lot of time high up in the rpm (as it does now) I have done this work a few times before on previous cars and yes, driveability is reduced. You have to learn how to drive it.
#105
#107
Kinda looks like im going to switch back to the auto harness and get the AEM 30-6051 to fully tune it There is a dyno shop not far from here that does alot with the aem units.
#108
32hp my assholio. I'd believe you ONLY if you first showed dyno results of a big block V8 producing these kinds of numbers! Are you speaking in terms of crank lightening/knife edging only or in conjunction with balancing the lower end components as well....that MIGHT a little feasible.
I'm an electrical tech by strength and I've always said I'm mechanically declined by weakness...haha. That's being said, I can conceptualize most things mechanically but just like most here, I have a lot to learn and never stop asking questions when I dont know or understand something.
Anywho, thanks for the detailed description of that but I'm still convinced that most of the "10/10" gains will come from reducing the diameter. Not weight. Until that too is shown by dyno graph, ill stubbornly stick to my opinion. :-) I'm a show me type of person and because of that, I believe most knowledge I hold is pretty damn accurate!
Anywho, thanks for the detailed description of that but I'm still convinced that most of the "10/10" gains will come from reducing the diameter. Not weight. Until that too is shown by dyno graph, ill stubbornly stick to my opinion. :-) I'm a show me type of person and because of that, I believe most knowledge I hold is pretty damn accurate!
#109
#111
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civicdrivr (06-29-2012)
#112
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