what makes the 2.2 a 2.2
Joined: Aug 2003
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From: Columbia, SC
Originally Posted by overst33r,Jul 19 2007, 08:29 AM
No. Lowering the redline will not cause displacement to magically go up. They lowered the redline because the engine makes maximum torque earlier, therefore making maximum hp sooner. There is no replacement for displacement.
EDIT: whoops, didn't see the LOL at the bottom... so your comment was sarcastic i guess...
EDIT: whoops, didn't see the LOL at the bottom... so your comment was sarcastic i guess...
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From: Palm Harbor, FL
Originally Posted by 00CivicSi,Jul 19 2007, 06:06 AM
True that the peak HP and TQ occur at lower engine speeds, but the redline was lowered because the increased stroke causes higher piston speeds for the same engine speed. It seems Honda felt that piston speed was a limiting factor.
I'm sure Honda could have given the F22c a 9k redline, but then it would not have had the same torque increase as it does with the 8k redline.
Joined: Feb 2006
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From: Northeast Jersey
Originally Posted by overst33r,Jul 19 2007, 06:20 AM
I've read about that issue as well. With the F22's current characteristics, a higher redline will result in a significant power loss after 8000 RPM.
I'm sure Honda could have given the F22c a 9k redline, but then it would not have had the same torque increase as it does with the 8k redline.
I'm sure Honda could have given the F22c a 9k redline, but then it would not have had the same torque increase as it does with the 8k redline.
Raising the redline from 8k to 9k would actually increase HP, as some have done by changing their ECU to the AP1 ECU.
Andre
Joined: Aug 2003
Posts: 9,583
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From: Columbia, SC
Originally Posted by overst33r,Jul 19 2007, 10:20 AM
I've read about that issue as well. With the F22's current characteristics, a higher redline will result in a significant power loss after 8000 RPM.
I'm sure Honda could have given the F22c a 9k redline, but then it would not have had the same torque increase as it does with the 8k redline.
I'm sure Honda could have given the F22c a 9k redline, but then it would not have had the same torque increase as it does with the 8k redline.
8kGoodENuff @ Jul 19 2007, 10:25 AM]
Actually... it has nothing to do with HP and Torque, it has to do with stress on the components. If the 2.2 kept the same redline of 9k, then the components would a shorter life span due to more stress.
Raising the redline from 8k to 9k would actually increase HP, as some have done by changing their ECU to the AP1 ECU.
Originally Posted by overst33r @ Jul 19 2007, 06:20 AM
I've read about that issue as well. With the F22's current characteristics, a higher redline will result in a significant power loss after 8000 RPM.
I'm sure Honda could have given the F22c a 9k redline, but then it would not have had the same torque increase as it does with the 8k redline.
I'm sure Honda could have given the F22c a 9k redline, but then it would not have had the same torque increase as it does with the 8k redline.
Raising the redline from 8k to 9k would actually increase HP, as some have done by changing their ECU to the AP1 ECU.
And max piston speed at redline is just one indication of the higher stresses the internal components would be subjected to. 
Registered User
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From: WV Pan Handle
Originally Posted by RED MX5,Jul 19 2007, 01:40 AM
LOL, only if r is equal to 1/2 the bore and h is equal to the stroke.
