"building" an engine
Thread Starter
Member
Joined: Jun 2002
Posts: 97
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From: Rochester, NY
Ok, I've been on vacation for Christmas and I am glad to see my thread is still alive. I do, however, need a vocabulary lesson since I am a noob to this engine stuff and my huge manual is back in Rochester. Please define and clarify the following terms:
My main point of confusion is all the talk about cutting. What are you cutting, making cuts with, etc? Thanks for those of you who can clarify some of this for me.
Originally posted by 1stGenCRXer
Knife edging
Volumetric efficiency
Angle valve seat
The more cuts you make, the thinner the sealing area is going to be.
Valve guide
Leakdown
Pistol and mortar effect
Laminar flow
Knife edging
Volumetric efficiency
Angle valve seat
The more cuts you make, the thinner the sealing area is going to be.
Valve guide
Leakdown
Pistol and mortar effect
Laminar flow
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Originally posted by livelyjay
Ok, I've been on vacation for Christmas and I am glad to see my thread is still alive. I do, however, need a vocabulary lesson since I am a noob to this engine stuff and my huge manual is back in Rochester. Please define and clarify the following terms:
My main point of confusion is all the talk about cutting. What are you cutting, making cuts with, etc? Thanks for those of you who can clarify some of this for me.
Ok, I've been on vacation for Christmas and I am glad to see my thread is still alive. I do, however, need a vocabulary lesson since I am a noob to this engine stuff and my huge manual is back in Rochester. Please define and clarify the following terms:
My main point of confusion is all the talk about cutting. What are you cutting, making cuts with, etc? Thanks for those of you who can clarify some of this for me.
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Originally posted by 1stGenCRXer
You're obviously from the "more is better" crowd, in which case I would have to say you have a lot to learn.
really, i have a lot to learn? the first time i p&p'ed my head, i was runnin with si's/teg's with major bolt on mods. then i went and bought ctr cams and some adj. cam gears and was beatin prelude sh's with cai, header, and exhaust. ive learned what i need to learn. i was taught from one of the best, his name is ralph shumacher.
thought the valve guide sat above the valve seats. in fact, i thought the valve guides sat higher than the port does. but am i wrong, probably not. at the time i first wrote that, i had just gotten my head back from the machine shop. and the guy who cut my valve seats did a raduis valve job on his yamaha r1...much smaller valves, much smaller ports, much smaller seats.
didnt i say you dont want to polish it too much because it will effect atomization. once again i was taught by one of the best.
Finally, there's no question Ferrea makes quality parts. The simple truth is that it's hard to swallow the price, especially when 99% of engine builders are not trying to get 150%. For all-out racing applications, your suggestions hold a bit more water, but for street driving, even I have to call it overkill.
You're obviously from the "more is better" crowd, in which case I would have to say you have a lot to learn.
really, i have a lot to learn? the first time i p&p'ed my head, i was runnin with si's/teg's with major bolt on mods. then i went and bought ctr cams and some adj. cam gears and was beatin prelude sh's with cai, header, and exhaust. ive learned what i need to learn. i was taught from one of the best, his name is ralph shumacher.
thought the valve guide sat above the valve seats. in fact, i thought the valve guides sat higher than the port does. but am i wrong, probably not. at the time i first wrote that, i had just gotten my head back from the machine shop. and the guy who cut my valve seats did a raduis valve job on his yamaha r1...much smaller valves, much smaller ports, much smaller seats.
didnt i say you dont want to polish it too much because it will effect atomization. once again i was taught by one of the best.
Finally, there's no question Ferrea makes quality parts. The simple truth is that it's hard to swallow the price, especially when 99% of engine builders are not trying to get 150%. For all-out racing applications, your suggestions hold a bit more water, but for street driving, even I have to call it overkill.
oh yeah, the guy who is helping me build my engine can bench grind sohc cam that gained him 27 hp.
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From: Madison, WI
Originally posted by livelyjay
My main point of confusion is all the talk about cutting. What are you cutting, making cuts with, etc? Thanks for those of you who can clarify some of this for me.
My main point of confusion is all the talk about cutting. What are you cutting, making cuts with, etc? Thanks for those of you who can clarify some of this for me.
Originally posted by ferrealb16
well personally, jun valves are crap, skunk2 is bunk, mugen is a complete joke. its not called over kill, its called doing it right the first time, the only time. complete ferrea valve train minus roller rockers/cam for around 1300. when buying internal engine components, you get what you pay for.
well personally, jun valves are crap, skunk2 is bunk, mugen is a complete joke. its not called over kill, its called doing it right the first time, the only time. complete ferrea valve train minus roller rockers/cam for around 1300. when buying internal engine components, you get what you pay for.
oh yeah, the guy who is helping me build my engine can bench grind sohc cam that gained him 27 hp.
GWAKS- Tech Geekifier
Joined: Oct 2000
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From: Hampton, VA
Originally posted by ferrealb16
really, i have a lot to learn? the first time i p&p'ed my head, i was runnin with si's/teg's with major bolt on mods. then i went and bought ctr cams and some adj. cam gears and was beatin prelude sh's with cai, header, and exhaust. ive learned what i need to learn. i was taught from one of the best, his name is ralph shumacher.
really, i have a lot to learn? the first time i p&p'ed my head, i was runnin with si's/teg's with major bolt on mods. then i went and bought ctr cams and some adj. cam gears and was beatin prelude sh's with cai, header, and exhaust. ive learned what i need to learn. i was taught from one of the best, his name is ralph shumacher.
thought the valve guide sat above the valve seats. in fact, i thought the valve guides sat higher than the port does. but am i wrong, probably not. at the time i first wrote that, i had just gotten my head back from the machine shop. and the guy who cut my valve seats did a raduis valve job on his yamaha r1...much smaller valves, much smaller ports, much smaller seats.
didnt i say you dont want to polish it too much because it will effect atomization. once again i was taught by one of the best.
well personally, jun valves are crap, skunk2 is bunk, mugen is a complete joke. its not called over kill, its called doing it right the first time, the only time. complete ferrea valve train minus roller rockers/cam for around 1300. when buying internal engine components, you get what you pay for.
oh yeah, the guy who is helping me build my engine can bench grind sohc cam that gained him 27 hp.
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Joined: Jun 2002
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From: Rockville Md
Wow. What a discussion. Head modification should be driven by the intended service (street, strip, road course).
I've only been into the C32A1 engine (G2 Legend) and those are the shortest, straightest ports I've ever seen (used to play with all sorts of american iron). I would think the 4cylinder heads are similar. IMO all they need is port matching and blending of the valve guide boss on a street engine.
On the subject of polishing and atomization: Those concerns apply to carbed engines. Injectors fully atomize the fuel (when clean) and are timed to valve opening. C32A1 injectors are aimed directly at the intake valves, bet 4 cylinders are the same.
Finally: Head porting is as much an art as it is science. Chose your "artist" based on his previous work.
I've only been into the C32A1 engine (G2 Legend) and those are the shortest, straightest ports I've ever seen (used to play with all sorts of american iron). I would think the 4cylinder heads are similar. IMO all they need is port matching and blending of the valve guide boss on a street engine.
On the subject of polishing and atomization: Those concerns apply to carbed engines. Injectors fully atomize the fuel (when clean) and are timed to valve opening. C32A1 injectors are aimed directly at the intake valves, bet 4 cylinders are the same.
Finally: Head porting is as much an art as it is science. Chose your "artist" based on his previous work.
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Originally posted by ferrealb16
well personally, jun valves are crap, skunk2 is bunk, mugen is a complete joke.
well personally, jun valves are crap, skunk2 is bunk, mugen is a complete joke.
As for you and your Ferrea valve train, what if their spring rates don't match what you want? There is a proper solution for every application.
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From: Hampton, VA
Originally posted by Dave C
On the subject of polishing and atomization: Those concerns apply to carbed engines. Injectors fully atomize the fuel (when clean) and are timed to valve opening. C32A1 injectors are aimed directly at the intake valves, bet 4 cylinders are the same.
On the subject of polishing and atomization: Those concerns apply to carbed engines. Injectors fully atomize the fuel (when clean) and are timed to valve opening. C32A1 injectors are aimed directly at the intake valves, bet 4 cylinders are the same.
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Joined: Jun 2002
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From: Rochester, NY
Originally posted by qtiger
Why? Back up your hypothesis with data.
As for you and your Ferrea valve train, what if their spring rates don't match what you want? There is a proper solution for every application.
Why? Back up your hypothesis with data.
As for you and your Ferrea valve train, what if their spring rates don't match what you want? There is a proper solution for every application.
been there done that
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From: 916
Originally posted by livelyjay
So when you replace the valve springs you have to worry about those spring rates as well? What would happen if you got incorrect spring rates? What difference would different spring rate make?
So when you replace the valve springs you have to worry about those spring rates as well? What would happen if you got incorrect spring rates? What difference would different spring rate make?
