What is the limit of the stock block?
Apr 29, 2009, 10:35 AM
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What is the limit of the stock block?
Like the post says just wanted to know what are the hp limits on the stock block has anyone blown them up yet how much boost do they handle before boom cause i see alot of people sleeving and block gards but no one has tested the limits on a non sleeved block who is to say they hold 800 hp who is to say they dont please big shops chime in
Apr 29, 2009, 03:39 PM
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I think that this is still an area of undiscovered country. I think there have been maybe 1 or 2 failures...but those were both due to improper (or no) tuning with increased boost.
Apr 29, 2009, 03:55 PM
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At the point of 450 or so whp, most of the big dogs have been sleeving the block. I don't recall hearing very many problems though; it was mainly a precaution.
Apr 29, 2009, 07:34 PM
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that is what i mean why is everyone spending between 800 to 1200 bucks on sleeving a motor i know they dont want to take the chance on blowing one up but it will be good to know the limits of the stock sleeves so an average joe dont waist money on sleeving a motor if they dont have to. Thats my opinion
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Apr 29, 2009, 07:48 PM
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that is what i mean why is everyone spending between 800 to 1200 bucks on sleeving a motor i know they dont want to take the chance on blowing one up but it will be good to know the limits of the stock sleeves so an average joe dont waist money on sleeving a motor if they dont have to. Thats my opinion
Apr 29, 2009, 09:57 PM
#9
No one knows as of now. AMS has a prototype GT35R and run 487 if I am not mistaken. Buscher is running one at 440AWHP, ETS has one at 420 (ran out of fuel). If you search there are a few others that I am missing that are running into the mid 400's. The 4B11 seems to be proving itself very well. Even if 500 was the limit. Most won't even come close with out running race fuel or meth and 450 would be a great number to have as a DD.
Apr 29, 2009, 10:36 PM
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no actually i am going to do it on both of my cars one is going to have a jun strocker kit that i already have with a 35r that is on the car already and the other car is going to be a 2liter 42r drag car
Apr 29, 2009, 10:49 PM
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This is just my speculation...
But I believe the 4B11 will have a very nice power potential stock. #1 it's a very well-designed engine. In many ways, stronger than the 4G63. #2 better cooling because of the all aluminum design. #3 the variable cam timing, and other aspects of the 4B11's efficient design allow you to make more power with less boost (given a properly sized turbo).
All of these things and others lead me to believe that the 4B11 could be good for 500 WHP daily driven. You have to remember that aluminum doesn't imply weakness. Remember your pistons are aluminum after all, although the crowns are protected by a boundary layer during combustion. Still, the thickness of the cylinder walls seems more than adequate for some nice output. Remember, excessive heat and knock are the enemy - and the 4B11 is good at thwarting both.
But I believe the 4B11 will have a very nice power potential stock. #1 it's a very well-designed engine. In many ways, stronger than the 4G63. #2 better cooling because of the all aluminum design. #3 the variable cam timing, and other aspects of the 4B11's efficient design allow you to make more power with less boost (given a properly sized turbo).
All of these things and others lead me to believe that the 4B11 could be good for 500 WHP daily driven. You have to remember that aluminum doesn't imply weakness. Remember your pistons are aluminum after all, although the crowns are protected by a boundary layer during combustion. Still, the thickness of the cylinder walls seems more than adequate for some nice output. Remember, excessive heat and knock are the enemy - and the 4B11 is good at thwarting both.
