Compression vs Horsepower

14082 Views 193 Replies 27 Participants Last post by Belette, Jan 14, 2007

CrxKev

Discussion Starter · Dec 20, 2006

I searched for this but didn't find it.

It is probably different for every motor and depending on other mods but:

How much increase in horsepower will a motor see from (X) amount increase in compression?

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Crossroads

· #61 · Dec 25, 2006

How do you tune that resonant wave? Port work on both the head and intake manifold. For that fact, let's get into exhaust scavaging and its effect on pulling the next charge in. The point still stands that just raising compression is the wrong way to build a performance engine and you WILL make the same power with lower compression and more timing. Your engine WILL be more volumetrically, thermally, and mechanically efficient. It's funny that you say porting won't get you over 100% VE. There are several professional Honda head porters who can get 125% VE with 11.5:1 compression. One of them happens to be the guy who built SMSP's A6. I guess you guys just aren't as good as them.

By the way. I'm not rich either, I just believe in doing things correctly the first time. The crossroads I'm at in my life is whether I continue doing what I love and living paycheck to paycheck while getting to spend as much time as I want with my family or making $100k+ a year and spending extended periods away from my family. But thanks for playing internet psychologist.

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Crossroads

· #62 · Dec 25, 2006 (Edited)

88cr-rex said:
And transzex and I haven't? Further more, the people on here WITH ACTUAL REAL-WORLD EXPERIENCE have posted their ideas and you ignore them because the gods that be on honda-tech have said its improbable.

You need to read this site. http://www.literacy.uconn.edu/compre.htm. It'll improve your reading comprehension skills so you can actually understand what I'm saying instead of reading what you want to see.

88cr-rex said:
Here you go again with your blanket statements. I am convinced this is your main problem. You regurgitate other people's comments out of context and then apply them to any situation. Do you even know how to calculate VE?

I was under the impression that this was about general engine theory and not about one specific engine. I'm sorry, I wasn't born with this information and I've had to learn from professionals with decades of experience.

VE = (CFM x 3456) ÷ (CID x RPM).

88cr-rex said:
Do you honestly think there are many n/a engines on the street that even approach 95%. Even on honda-tech? An n/a motor that sees 100% VE is one very well built motor. Have you built one?

A Honda that sees over 100% VE isn't even hard to do if you know how to do it. Don't forget that these aren't two valve per cylinder V8s, they're four valve per cylinder Hondas. I'm not a professional head porter so no I haven't ported a head that well yet. The best I've gotten is 99%. Here you go making blanket assumptions.

BigTuna

· #63 · Dec 25, 2006 (Edited)

Yawn.. Just build your motor the way you want to since your the only who is going to by driving your car. It always cracks me up that people do a 1000 hours of research on the internet and never spend 1 minute doing their own R&D. Stop listening to the internet and start listening to your car and learning from your own setups and how your car is effected by those changes. I believe that is the only way to learn what works and what doesnt.

KNOWLEDGE IS THE BYPRODUCT OF PERSONAL TRIAL AND ERROR

Reactions: 1

Crossroads

· #64 · Dec 25, 2006

Ok, what should I do about the professionals I talk to in person? Should I just tell them to fuck off because the internet says so? Should I burn the flowbench and block building books I have and rely on what D-Series says is correct? I don't think so. If I did that I'd be running 14:1 with a "stage 3" cam in a stock head.

A wise man learns from his own mistakes but a genious learns from the mistakes of others. You can insist on taking the hard road if you want, but that's not me. I don't need to cut the corners off a square to find out a round object rolls. I don't need to touch fire to find out it's hot. I don't need to make the same mistakes that other people made 20+ years ago. I'd rather make my own mistakes, which I do. I just have book learning to fall back on instead of internet heresay and my garage. There are proven paths to efficient power.

Yawn indeed.

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Clutchmaster

· #65 · Dec 25, 2006 (Edited)

Crossroads said:
Ok, what should I do about the professionals I talk to in person? Should I just tell them to fuck off because the internet says so? Should I burn the flowbench and block building books I have and rely on what D-Series says is correct? I don't think so. If I did that I'd be running 14:1 with a "stage 3" cam in a stock head.

A wise man learns from his own mistakes but a genious learns from the mistakes of others. You can insist on taking the hard road if you want, but that's not me. I don't need to cut the corners off a square to find out a round object rolls. I don't need to touch fire to find out it's hot. I don't need to make the same mistakes that other people made 20+ years ago. I'd rather make my own mistakes, which I do. I just have book learning to fall back on instead of internet heresay and my garage. There are proven paths to efficient power.

Yawn indeed.

here's a question who really fucking cares..are you really gonna expend so much energy trying to prove weather or not to listen to what some one has to say. Both parties are right and wrong in there own perspectives...plus it's the internet..So you share your opinions and take what some one has to say with a grain of salt..especially if they're not there turning wrenches with you
______________

Crossroads

· #66 · Dec 25, 2006 (Edited)

I've expended less energy doing this than I would've if I would've cut down the dead peach tree in the back yard like I was supposed to have done.

All I ask is that people stop talking to me like I'm stupid and inexperienced simply because they don't know me. I could've quoted a lot of the people I've learned from in person but nobody here would know who they are either and wouldn't give them any credit. They do win races with the engines they build, though. Hell, my first project was helping my best friend in high school convert his '59 Chevy longbed stepside into a shortbed stepside, 15 years ago. I'm not new to turning wrenchs nor am I a professional. I'm just new to the site and have different opinions from what's popular.

Clutchmaster

· #67 · Dec 25, 2006

but see your proving my point BY REPLYING!!!!!! your keeping the nonsense going...I'm done

" Low "

· #68 · Dec 25, 2006

hahahah, and the winner is.........

Crossroads

· #69 · Dec 25, 2006

Clutchmaster said:
but see your proving my point BY REPLYING!!!!!! your keeping the nonsense going...I'm done

Ok, here's your grain of salt. You're a hypocrite since you posted again, too.

Merry Christmas. I just took a bong rip for all of you.

dragman99

· #70 · Dec 25, 2006

Crossroads said:
Ok, here's your grain of salt. You're a hypocrite since you posted again, too.

Merry Christmas. I just took a bong rip for all of you.

*looks at post count*

soooo ummhh, whatcha sellin'?

dragman99

· #71 · Dec 25, 2006

i'm going to tell you the truth. you're an asshat noob who decided to take a thread way too seriously and didn't like it when you got flamed.

and i'm sure all these great builders have told you there secret to success so you could copy them. don't be a dumbass. and yes, you read way too much on the internet. the truth is, everyone knows what works for them. and they learned it through trial and error, not listening to what their competition told them.

so please, let me redirect you to where you need to be.

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Crossroads

· #72 · Dec 25, 2006

I'm going to tell you the truth, you're a fucking illiterate idiot. Did I say they showed me all of their secrets? No, in fact I quite plainly said that I'm not a professional and I've only been able to get 99% VE so far. You know what makes me laugh? How all of you guys keep saying "don't believe the internet" and yet here you are telling people what they should do. Isn't that, oh I don't know, somewhat hypocritical? Yeah, I think that's the word for it. I'm sorry, if I'm talking to someone through an IM I kind of have to read the internet.

And I'm not selling anything. Not that I think you're going to believe that because you're one of those internet dickwads who thinks all newbies are stupid simply due to their post count. You're a full on tool, dude. Good job. :TU:

Clutchmaster

· #73 · Dec 25, 2006

your not gonna win here buddy I don't even know why your trying

thoust let the flaming begin

Crossroads

· #74 · Dec 25, 2006

I expect nothing less than idiotic flames. "He's differ'nt 'en us...get 'im!"

dragman99

· #75 · Dec 25, 2006

Crossroads said:
I'm going to tell you the truth, you're a fucking illiterate idiot. Did I say they showed me all of their secrets? No, in fact I quite plainly said that I'm not a professional and I've only been able to get 99% VE so far. You know what makes me laugh? How all of you guys keep saying "don't believe the internet" and yet here you are telling people what they should do. Isn't that, oh I don't know, somewhat hypocritical? Yeah, I think that's the word for it. I'm sorry, if I'm talking to someone through an IM I kind of have to read the internet.

And I'm not selling anything. Not that I think you're going to believe that because you're one of those internet dickwads who thinks all newbies are stupid simply due to their post count. You're a full on tool, dude. Good job. :TU:

hey i take pride in my work and i don't claim to know something i don't.

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dragman99

· #76 · Dec 25, 2006

Crossroads said:
I expect nothing less than idiotic flames.

and why shouldn't you?

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Reactions: 1

Crossroads

· #77 · Dec 25, 2006

And you're assuming that I'm different. That makes you an even bigger idiot. Keep the funny pictures coming. Hell, let's get this bitch to 10 pages of this site acting like retards!

Crossroads

· #78 · Dec 25, 2006

Hurry up kiddies, the bandwagon's gonna leave without you!

dragman99

· #79 · Dec 25, 2006

Crossroads said:
And you're assuming that I'm different. That makes you an even bigger idiot. Keep the funny pictures coming. Hell, let's get this bitch to 10 pages of this site acting like retards!

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Crossroads

· #80 · Dec 25, 2006

That one's lame dude. I demand a better one.

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