What's the highest known WHP on a S4 Block?
#1
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What's the highest known WHP on a S4 Block?
Trying to get a idea on how much I can get on my S4 block.
What's the highest known HP that someone has achieved on a S4 block without any studding?
What's the highest known HP that someone has achieved on a S4 block without any studding?
#2
well my s4 block (turbo) i got 420hp to the wheels with a minor port job and some upgrades...60-1 turbo 1000 cc primary injectors, 1600 secondary injectors, fuel pump 3 in exhaust and a lt10 microtech stand alone. oh at 20lb of boost
#4
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You need to ask for other details? Is this S4 block running stock S4 rotors? Is the block doweled, or added side plates, bottom plates, etc..alot can be added to a stock block. I would ask for specifics. Like a stock oem block limits, or something along those lines..Basically your hunting @ the zoo and you got the deer in the corner..lol Your not going to get what your looking to know, from what your asking.
#7
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You need to ask for other details? Is this S4 block running stock S4 rotors? Is the block doweled, or added side plates, bottom plates, etc..alot can be added to a stock block. I would ask for specifics. Like a stock oem block limits, or something along those lines..Basically your hunting @ the zoo and you got the deer in the corner..lol Your not going to get what your looking to know, from what your asking.
Generally speaking, I know an S5 block won't take kindly to much more then 520-550whp for extended periods......depending on the castings......but I honestly have no idea where the limit would be for a few glory pulls.
My best (safe) guess with an S4 block for a *reliable* (and repeatable) amount of power would be 480ish before things start dropping off the engine.
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#9
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The reason, I ask. Is, because I have a stock S4 block and I want to have a little fun this winter before I get silly next spring.
Just wanted to get an idea of what kind I power I can play with before breaking something. It's getting tuned by Kan in November so tuning should be spot on.
Just wanted to get an idea of what kind I power I can play with before breaking something. It's getting tuned by Kan in November so tuning should be spot on.
#10
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The reason, I ask. Is, because I have a stock S4 block and I want to have a little fun this winter before I get silly next spring.
Just wanted to get an idea of what kind I power I can play with before breaking something. It's getting tuned by Kan in November so tuning should be spot on.
Just wanted to get an idea of what kind I power I can play with before breaking something. It's getting tuned by Kan in November so tuning should be spot on.
#15
BDC Motorsports
I've heard about a guy in Australia who made over 700 on an unpinned S4 block in a drag car. Never saw the car or got any other info but I found it interesting because it supports my theory that the older blocks can hold high power just fine. I don't think the issue is power with the engine blocks and I don't think that whatever "reinforcement" that was done on sucessive engines has anything to do with power se; I think it has to do with knock resiliency.
If you look real close, you'll notice that the only thing that holds the housings laterally together is the cast iron dowel lands on the three irons. When the rotor housings either swell or want to deflect laterally against the iron, they drag the dowel pins with them and the iron lands on the housings are what are having to hold these pins inplace. In short, the iron dowel lands are holding all of the force of combustion. When the engine experiences engine knock that produces severe spikes in pressure, it's my opinion that those quick blasts inside the chambers act alot like trying to smack the side of the housing with a hammer and that's what ultimately breaks those lands. Notice the direction that the lands on the irons crack.
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If you look real close, you'll notice that the only thing that holds the housings laterally together is the cast iron dowel lands on the three irons. When the rotor housings either swell or want to deflect laterally against the iron, they drag the dowel pins with them and the iron lands on the housings are what are having to hold these pins inplace. In short, the iron dowel lands are holding all of the force of combustion. When the engine experiences engine knock that produces severe spikes in pressure, it's my opinion that those quick blasts inside the chambers act alot like trying to smack the side of the housing with a hammer and that's what ultimately breaks those lands. Notice the direction that the lands on the irons crack.
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#18
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Certainly the thicker castings are more resiliant, and I also believe the engine mount placement plays a role as if you examine the history of them, each major engine revision brought the mounts further back....
#20
BDC Motorsports
As far as the spark plug location, I am not sure. It does something with changing the effect of the flame front but I don't know. Crispeed may be able to answer that.
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#21
BDC Motorsports
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#24
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