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View Full Version : Advantage of 2.5 over a 2.4?


Viper GTs
08-04-2010, 07:15 AM
What are the main differences technically, depenability wise, performance, etc. Thanks...Al
Eagle One
08-04-2010, 08:50 AM
Like night and day. The 2.5 has 11 more cubic inches, a better induction design, steel sleeves on production engines which is just plain more reliable. Better and lighter rods, Larger upper and center main bearings, Kinda like comparing chicken salad and chicken manure... They both come from a chicken but just ain't quite the same.
jay j
08-04-2010, 09:04 AM
Dang Noak you getting good at explaining these days, lol. You coming to Eufaula? Like to see you there. Later Jay
Viper GTs
08-04-2010, 01:19 PM
What year 2.5 motors are best in the 225 HP range? When did they go with oil and fuel injection? Would that be the best choice? the 260s and 280s seem more problematic than the others from what I have seen on this site...If I can afford it over the winter I want to put on 2 300X motors...Al
T-REX
08-04-2010, 05:49 PM
Don't thank kuz ya got a 2.5 U iz captian bad, kuz sumbody that know's how ta stir dat chizken chit, will kick dat 2.5 azz!!!.....An ta me, a chrome bo 2.4 200 iz az bullet proof az they kum!!!....JMO
rdkvector
08-04-2010, 07:19 PM
:iagree:T-rex Knows it. There are alot of old 2.4's still out there doing what they are supposed to do. Both great motors.
Reaction19
08-04-2010, 07:57 PM
2.4 is a good motor evry weekend we run 50 miles at least and 49.9 my 2.4 is to the wood wfo. and never misses a beat but good oil right jetting and 93 octane all play a roll
Markus
08-05-2010, 06:23 AM
Like night and day. The 2.5 has 11 more cubic inches, a better induction design, steel sleeves on production engines which is just plain more reliable. Better and lighter rods, Larger upper and center main bearings, Kinda like comparing chicken salad and chicken manure... They both come from a chicken but just ain't quite the same.

Also, due to competition from Yamaha, Mercury´s quality got a lot better in the early nineties, which coincided with the introduction of the 2.5 liter engines.
Viper GTs
08-05-2010, 10:55 AM
When did the oil injection models come out? Is there an advatage of those over the older premix models? Al
Markus
08-05-2010, 11:28 AM
Is there an advatage of those over the older premix models? Al

Advantage: You pour oil into a container instead of into the fuel tank.

Disadvantage: You have a crappy oil injection design that is likely to at a minimum require the purchase of a couple of oversize pistons, boring, honing, balancing and rings when it fails.
Viper GTs
08-05-2010, 03:05 PM
Advantage: You pour oil into a container instead of into the fuel tank.

Disadvantage: You have a crappy oil injection design that is likely to at a minimum require the purchase of a couple of oversize pistons, boring, honing, balancing and rings when it fails. With that being said are there alot of oil injection failures? If so it may be wise to go with the non injection motors...Are all 2.5s fuel injected? Thanks...Al