How much power can the 4B11 handle.....
Dec 30, 2008, 12:27 AM
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How much power can the 4B11 handle.....
I was wondering how much power can the 4B11 motor handle before it blows? Thats also saying if anybody has blown there motors yet.
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Dec 30, 2008, 11:34 AM
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Thats crazy so pretty much the motor was built well to handle alot of power. I think for daily drivers 400-500 would be a good amount anything higher then that put it on the track.
Dec 30, 2008, 12:46 PM
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if customer comes thru..we should have one that makes in the neighborhood of 700..I would like to see where one fails though, with a rod and piston and without a sleeve in it. Carnage is cool sometimes.
Dec 30, 2008, 12:53 PM
#10
Depending on the dyno, 400-450 is PLENTY for the street, and track for that matter, for most people. Unless you are building a drag car and trying to run 9 second passes, there's not really any need to run any more power than that. I think it's funny though, all the 4g63 fans talk about how the 4g63 can handle like 1000 hp and they talk down on the 4b11 when they themselves are only making like 350 whp, which is well below what the 4b11 can handle on the stock long block.
Hell, if you want to get technical, the 4b11 seems to handle more power on stock internals than the 4g63 does, so there's another aspect to consider. Going back to the OP's question though, I have personally heard rumors of a couple blown 4b11s, and surprisingly enough, at power levels far below what other companies are pushing this thing to which to me, implies tuner error. The 4b11 loves to rev, thanks to it's square bore and stroke, and seems to handle surprisingly lean A/F ratios and lots of timing.
But, when you've got a car that has soft valve springs, raising the rev limiter to 8k and running it **** lean with lots of timing is just stupid and asking for trouble, and if you pop a 4b11 doing this, you have no one else to blame but yourself. It's like some kid running a 300 shot of nos into his civic and then blaming the car when it blows. In any case, I would say that with a proper tune and supporting mods, I think the 4b11 will be perfectly reliable at 450 whp on a dyno jet, 400 mustang/dyno dynamics.
Even though AGP and vivid have pushed the 500 mark, I wouldn't trust it for very long. The 4b11 is a great engine, but c'mon, you guys have to be realistic. Hell, AMS has been running like 450+ whp on their X and have chosen to build the block before going past that, so they clearly feel that they are about at the limits and want to take precautionary measures before raising power levels any higher. I trust AMS, and if that's what they're doing, then that's what I'll go by.
Hell, if you want to get technical, the 4b11 seems to handle more power on stock internals than the 4g63 does, so there's another aspect to consider. Going back to the OP's question though, I have personally heard rumors of a couple blown 4b11s, and surprisingly enough, at power levels far below what other companies are pushing this thing to which to me, implies tuner error. The 4b11 loves to rev, thanks to it's square bore and stroke, and seems to handle surprisingly lean A/F ratios and lots of timing.
But, when you've got a car that has soft valve springs, raising the rev limiter to 8k and running it **** lean with lots of timing is just stupid and asking for trouble, and if you pop a 4b11 doing this, you have no one else to blame but yourself. It's like some kid running a 300 shot of nos into his civic and then blaming the car when it blows. In any case, I would say that with a proper tune and supporting mods, I think the 4b11 will be perfectly reliable at 450 whp on a dyno jet, 400 mustang/dyno dynamics.
Even though AGP and vivid have pushed the 500 mark, I wouldn't trust it for very long. The 4b11 is a great engine, but c'mon, you guys have to be realistic. Hell, AMS has been running like 450+ whp on their X and have chosen to build the block before going past that, so they clearly feel that they are about at the limits and want to take precautionary measures before raising power levels any higher. I trust AMS, and if that's what they're doing, then that's what I'll go by.
Last edited by STi2EvoX; Dec 30, 2008 at 12:58 PM.
Dec 30, 2008, 01:13 PM
#11
I would bet it can handle quite a bit of power. Look at GM's Ecotec engine which also has an aluminum block. The engine was meant for Cavaliers, Cobalts, Sunfires, etc. and can handle 600+whp with forged internals but on stock sleeves. I'd guess the 4B11 would be just as strong, if not stronger.
Dec 30, 2008, 03:34 PM
#14
Hard to say just yet. I think we will be pushing it to see what it can and cannot take.
Sor far we have built a Gt30R EVO X on race gas that made 487whp: https://www.evolutionm.net/forums/ev...e-30r-kit.html
And we have also built a GT35R EVO X that on pump gas so far has made 450whp: https://www.evolutionm.net/forums/ev...e-35r-kit.html
We have not pushed the GT35R kit past that as it was on the Time attack car and if any of you have noticed that's just a weee bit torn down at the moment
Eric
Sor far we have built a Gt30R EVO X on race gas that made 487whp: https://www.evolutionm.net/forums/ev...e-30r-kit.html
And we have also built a GT35R EVO X that on pump gas so far has made 450whp: https://www.evolutionm.net/forums/ev...e-35r-kit.html
We have not pushed the GT35R kit past that as it was on the Time attack car and if any of you have noticed that's just a weee bit torn down at the moment
Eric