How exactly is 4G63T superior to 4B11T?
May 9, 2011, 03:34 PM
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How exactly is 4G63T superior to 4B11T?
Knowing basically nothing about 4B11T, I originally thought that this new Evo X engine is somehow on the same level as 4G63T regarding dollar-per-hp tuning, until I see this:
Is 4B11T really so untunable?
May 9, 2011, 03:43 PM
#3
It's not that the 4b11T is "inferior" as the entire car is completely different then the Evo 7-9. The car is much heavier and the transmission gearing is shorter. The power to weight ratio is simply lacking with the Evo X in comparison to the 7-9's.
May 9, 2011, 03:56 PM
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Heh, this thread is like a hand grenade tossed into a room. It's a big disagreement between the VIII/IX and X fans. The X has superior OEM suspension and Active Yaw control, but worse gearing and hundreds of pounds of extra weight.
The power plants differ in a number of ways, but the 4B11 is aluminum with a semi-closed deck design opposed to the closed-deck iron block of the 4G63 it replaced. That means for significant power the 4B11T needs to be sleeved or it will split the cylinder walls. The advantage of the 4B11 is lighter weight (22 lbs or so as I recall) and variable valve timing on both intake and exhaust cams instead of the intake cam only. This gives it a bit more tuning flexibility than the MIVEC from the IXs.
One of the other differences that is often overlooked is the 4B11 is flipped 180 degrees from the 4G63 putting the exhaust manifold directly next to the firewall which helps reduce emissions as the extra heat burns away spent hydrocarbons but causes issues for performance at power levels significantly above stock.
Stock for stock the IXs will outperform the Xs, but both are capable of similar modifications. The Xs are more refined, quieter, with better safety and emissions. The VIII/IXs are more "raw" with cheap interiors, and tons of machine noise. The "better" car really depends on what you want out of it... daily driving, road course racer, drag car etc. The aesthetics are totally subjective, but I personally prefer the IX over nearly any car. I just love how the car looks. I know some people prefer the look of the new Xs. Your mileage may vary.
The power plants differ in a number of ways, but the 4B11 is aluminum with a semi-closed deck design opposed to the closed-deck iron block of the 4G63 it replaced. That means for significant power the 4B11T needs to be sleeved or it will split the cylinder walls. The advantage of the 4B11 is lighter weight (22 lbs or so as I recall) and variable valve timing on both intake and exhaust cams instead of the intake cam only. This gives it a bit more tuning flexibility than the MIVEC from the IXs.
One of the other differences that is often overlooked is the 4B11 is flipped 180 degrees from the 4G63 putting the exhaust manifold directly next to the firewall which helps reduce emissions as the extra heat burns away spent hydrocarbons but causes issues for performance at power levels significantly above stock.
Stock for stock the IXs will outperform the Xs, but both are capable of similar modifications. The Xs are more refined, quieter, with better safety and emissions. The VIII/IXs are more "raw" with cheap interiors, and tons of machine noise. The "better" car really depends on what you want out of it... daily driving, road course racer, drag car etc. The aesthetics are totally subjective, but I personally prefer the IX over nearly any car. I just love how the car looks. I know some people prefer the look of the new Xs. Your mileage may vary.
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autolove (Sep 5, 2019)
May 9, 2011, 04:01 PM
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The question comes to me because some friend asks me whether it is a good idea to buy a 9g Lancer / 4g Eclipse for 4B11T swap instead of 2g/3g Eclipse for 4G63T swap. I say I honestly don't know. lol.
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May 9, 2011, 05:01 PM
#10
I don't get people saying the X gearing is worse...my X GSR 5-speed gearing is nearly identical to my IX GSR 5-speed gearing. As for mod/tunability...I'm making the same WHP and more WTQ with less mods on my X vs. my IX 
I'm closing this before it gets out of hand though, which it will.
I'm closing this before it gets out of hand though, which it will.
Last edited by Kracka; May 9, 2011 at 05:03 PM.
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