What I see, is that essentially I'm squishing my transmission down to a 4-speed, and adding a completely new gear.. Let me explain. The 5th gear of my current transmission pegs out at 152 MPH. The 4th gear of the new transmission pegs out at 151 MPH.
Now, I understand that I won't be redlining every gear during daily driving; nor will I regularly be going over 110. The true benefit I'm seeing is fuel economy.
At a normal cruising speed of 80:
With the old transmission, I'd have the tach locked at 4040RPMs.
With the new transmission, I'd have the tach locked at 3220RPMs.
That is a 25.5% reduction in engine speed... now granted that the engine load will increase fuel consumption aswell; but even if it brings it up an entire step, it still won't add 25.5% fuel.
And, for race, I won't leave first gear until 7800rpm, which puts me in 2nd at 4800-7000rpm, and 3rd from 5000-7800rpm, redlining at 111.66 MPH... which is higher than my quarter mile speed anyhow.
So, I'm waiting for the bashing... who wants to be the first to tell me not to?
First, that chart has the wrong ratio for Tranny 2's 5th gear. Correct ratio is 0.812, chart shows 0.848. That will affect your estimated top speed, dropping it approximately 5-6mph.
Second, let's say you run the ¼mile in 15 flat at 95mph. That means you basically have 3rd gear pegged as you're cross the line. By swapping in this transmission, you'll be at 111mph with 3rd gear pegged, but instead of doing it in 15 seconds, it's going to require more like 19 seconds. So your actual ¼mile results will probably look like this: 16.5s @ 85mph. That's of course assuming no changes other than the transmission.
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1988 Prelude S - victim of an 80mph backflip
1991 Prelude Si - sold
1989 Accord DX - impounded
1998 Prelude SH - totaled on 3/29/12
2006 CRF150F - sold
2006 YZ250F - sold
I think it will be interesting to see the result. I think you may end up with an economic daily driver at the cost of having the light to light ability. I am unsure of the gasoline prices in the states right now but i am curious as to how this will effect both dense city driving as well as the top end on the highways, from a consumption standpoint.
Where did you get the idea to swap in this particular trans Conjur?
Having a taller 5th gear is a common thing talked about on other forums. Some have gone as far as just removing the 5th gear from an F-series transmission and putting it into their H-series transmission.
The gas consumption difference will vary greatly on driving habits. If you try to drive it like a Prelude SHOULD be driven, you probably won't see much difference. The increased load at lower RPMs will probably eat as much gas as you save once you get to a cruising speed.
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1988 Prelude S - victim of an 80mph backflip
1991 Prelude Si - sold
1989 Accord DX - impounded
1998 Prelude SH - totaled on 3/29/12
2006 CRF150F - sold
2006 YZ250F - sold
Second, let's say you run the ¼mile in 15 flat at 95mph. That means you basically have 3rd gear pegged as you're cross the line. By swapping in this transmission, you'll be at 111mph with 3rd gear pegged, but instead of doing it in 15 seconds, it's going to require more like 19 seconds. So your actual ¼mile results will probably look like this: 16.5s @ 85mph. That's of course assuming no changes other than the transmission.
We cant toss this statement out so lightly. That 1.5 seconds could be the difference between getting and not getting laid.
The reasoning behind this particular transmission is simple: I got a near-perfect M2L5 given to me, from a friend that wrecked his 93 Si
First gear won't ever have high load- I take off at 3k rpms, religiously.... burning the clutch makes for a smoother, non-jerky takeoff.... plus, it makes civic drivers poop a lil bit, when they hear it =D
This prelude has become my life-long daily driver now... it has an engine with stock internals again; so the only thing that I have going for me, is that every SRT4 in town still thinks that I can beat em (It's all in the bottle, baby) =D
The only thing that really scares me, is that the M2L5 comes off of an engine that comes stock with 125hp. Can it handle much more?
The only thing that really scares me, is that the M2L5 comes off of an engine that comes stock with 125hp. Can it handle much more?
Internally there are zero differences between all H/F series transmissions, except for ratios and possibly an LSD. They are equally good/bad. Hell, even the B/D series trannies look like H series trannies for the most part. I can't tell them apart with the covers off.
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I am not an active moderator on this site anymore. Please contact Phryxis or liquidxnitez for help with your issues.
to throw a little caveat into the conversation... i have whatever kind of transmission comes in my completely stock 93 Vtec... synchros are bad... shifts like ****... needs a rebuild.
I'm getting a completely rebuilt M2L5 for very very cheap... could i theoretically take it, and use it for parts to help the rebuild of what came in my stock 93 VTEC's tranny?
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