F22b Tranny on F18B
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F22b Tranny on F18B
I know US dudes dont know even if F18B exists but its of similar specs as F22b but its 1.8 Liters. Recently got car with F18B engine but its tranny is MP0A which probably belongs to F22B engines.
Question is one factor i for see is loss of initial torque and acceleration but other than that on at high speeds say at 60MPH it would keep engine on less RPM and would be fuel efficient.
Another friend said that All F series Automatic Transmissions are All the same no matter 1.8 or F22B
What would be the effects in this case?
Question is one factor i for see is loss of initial torque and acceleration but other than that on at high speeds say at 60MPH it would keep engine on less RPM and would be fuel efficient.
Another friend said that All F series Automatic Transmissions are All the same no matter 1.8 or F22B
What would be the effects in this case?
MM Gruppe B
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From: 94577/Gaillimh
Re: F22b Tranny on F18B
Transmissions are geared differently for the applications. Wagon/Estates have a lower Final Drive, USDM Accords do have some tall gearing, USDM Prelude S models with the F22A have more aggressive gearing for spirited driving. And the Odyssey/Prelude VTEC have the most aggressive gearing.
Externally the H4A cases are pretty much the same from 90-97 CB/CD Accords, 92-96 Preludes, 97 Acura CL, and 95-97 Odyssey/Oasis.
If you have an MPOA trans that sounds like the code for a 90-93 Accord which would have gearing like so
2.705 1
1.464 2
1.028 3
0.674 4
4.285 final
4th gear 195/60 R15
70mph = 2806 rpm
80mph = 3207 rpm
F18B VTEC did have more HP than a F22A1, but the F22s have much more torque at a lower rpm than the F18.
Taller/longer/higher gears make for better freeway cruising mileage, if your driving is mostly stop and go this gearing will be detrimental to mileage. Ideally getting up to speed quickly reduces fuel consumption. Too tall of a gear ratio can be as bad as having a car fully loaded with cargo. The engine will be loaded heavily.
With a smaller engine the reduction of available torque would need to be compensated for by with shorter/lower gears to allow the car to accelerate efficiently and get up to speed. And maintain that speed with a light engine load(high cruising vacuum).
An engine needs a transmission/gear ratios that will best compliment its power curve. If you cannot find an F18 automatic that is original for your cars application, I would look into the Asian/Euro market of Ascots/Preludes that came with the F18/F20A engines with H4A automatics.
Externally the H4A cases are pretty much the same from 90-97 CB/CD Accords, 92-96 Preludes, 97 Acura CL, and 95-97 Odyssey/Oasis.
If you have an MPOA trans that sounds like the code for a 90-93 Accord which would have gearing like so
2.705 1
1.464 2
1.028 3
0.674 4
4.285 final
4th gear 195/60 R15
70mph = 2806 rpm
80mph = 3207 rpm
F18B VTEC did have more HP than a F22A1, but the F22s have much more torque at a lower rpm than the F18.
Taller/longer/higher gears make for better freeway cruising mileage, if your driving is mostly stop and go this gearing will be detrimental to mileage. Ideally getting up to speed quickly reduces fuel consumption. Too tall of a gear ratio can be as bad as having a car fully loaded with cargo. The engine will be loaded heavily.
With a smaller engine the reduction of available torque would need to be compensated for by with shorter/lower gears to allow the car to accelerate efficiently and get up to speed. And maintain that speed with a light engine load(high cruising vacuum).
An engine needs a transmission/gear ratios that will best compliment its power curve. If you cannot find an F18 automatic that is original for your cars application, I would look into the Asian/Euro market of Ascots/Preludes that came with the F18/F20A engines with H4A automatics.
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