| 11-07-2005, 04:44 AM | #1 |
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Junior Member
Join Date: Oct 2005
Posts: 17
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got a quickie for ya ... how is it a 91 CRX HF has 62hp and gets like 47-50 mpg and a 1994 Civic VX hatch gets like 92hp with about the same mpg? they have the same engine if i am correct. is it all in their ecu settings? if so could you swap a vx ecu for a HF's and get the extra horses? i am totally confused!
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| 11-07-2005, 06:09 AM | #2 |
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Super Moderator
Join Date: Jul 2003
Location: Nor*Cal
Posts: 2,186
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You can't swap them, they are different obd versions...and it has more to it than just the ecu.
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| 11-07-2005, 01:39 PM | #3 | |
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Senior Member
Join Date: Jul 2003
Location: WestByGod
Posts: 327
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Quote:
[/quote] Yep, such as the multiple stages of VTEC with the VX to help it get that awesome gas mileage |
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| 11-07-2005, 04:05 PM | #4 |
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Senior Member
Join Date: Aug 2005
Posts: 325
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what si the difference between vtec and vtec-e?
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'02 Accord Coupe EX-V6 |
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| 11-07-2005, 04:13 PM | #5 |
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Senior Member
Join Date: Oct 2005
Posts: 181
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from memory, vtec-e basically turns a 16 valve motor into an 8 (or 12? it might be on the intake side only) valve up until 2500-ish rpms. the valves still open slightly so fuel doesn't puddle on them. after 2500-ish, the intake valves have different lift specs, which creates a cyclonic action in the cylinder. so the simple analogy is that it's an 88-91 HF motor before vtec, and (almost) a d15b7 after vtec. the HF motor is full-time 8 valve.
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89 CRX Si 13.8@103 |
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| 11-08-2005, 11:51 PM | #6 |
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Junior Member
Join Date: Oct 2005
Posts: 17
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im glad i can get the answers i need here, other wise i'd be left in the dark. thanks.
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