3076 with .83 vs. 35r with .63
8500rpm for a stroker is akin to 9600+ rpm for a 2.0L. The quickest way toward destruction is to spin it. For a daily driver, I'd recommend no more than 7500rpm for a stroker 4G63 - if you expect it to last anyway.
The weak point isn't the crank or the rods, but the tremendous loads that must be endured by the bearings and large sidewall loads on those small stroker pistons due to the sharp angles that result from that big stroke swinging around.
Just remember that 7500rpm with a stroker is akin to 8500rpm with a 2.0L, and the stroker must endure greater loads on top of that. If one has enough money to prep a replacement engine on standby, maybe it won't matter. If however, one would find himself seriously inconvenienced by the prospect of a destroyed engine, he'd be far for the wiser to consider this advice carefully.
The weak point isn't the crank or the rods, but the tremendous loads that must be endured by the bearings and large sidewall loads on those small stroker pistons due to the sharp angles that result from that big stroke swinging around.
Just remember that 7500rpm with a stroker is akin to 8500rpm with a 2.0L, and the stroker must endure greater loads on top of that. If one has enough money to prep a replacement engine on standby, maybe it won't matter. If however, one would find himself seriously inconvenienced by the prospect of a destroyed engine, he'd be far for the wiser to consider this advice carefully.
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From: City O Sin, MA...the not so sinish part though...
I shift now around 7500 when i wind it up. I was thinking i might have the urge to carry it out more(to about 8) if the turbo could keep the power better up top. I guess I'll just stick with the way i'm driving now then. Scorke, what are you making for power on your set up? What cams do you use?
Also, I've rode in a 2.0/25r car(Sean Ivey's) and was so pleased with the pull that i could see myself sacrificing the spool. Any idea what the difference in spool would be between the 2?(30 w/ .83 and 35r with .63)
Also, I've rode in a 2.0/25r car(Sean Ivey's) and was so pleased with the pull that i could see myself sacrificing the spool. Any idea what the difference in spool would be between the 2?(30 w/ .83 and 35r with .63)
^ It's in my sig, at 20 psi on pump I made 380/360 however the engine was reallll fresh, like 550 miles fresh. I was tuned down at Topspeed, Doug reckoned the motor was still a little tight and that it would fre up another 15-25 whp, after putting a bunch more miles on it I can feel a pretty signifigant difference via *** dyno but I will not no for sure till I go in again for a race gas tune. I am using the HKS 272's. Spool would probably be 4-500 rpm later.
Scorke
Scorke
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From: City O Sin, MA...the not so sinish part though...
Originally Posted by Ted B
8500rpm for a stroker is akin to 9600+ rpm for a 2.0L. The quickest way toward destruction is to spin it. For a daily driver, I'd recommend no more than 7500rpm for a stroker 4G63 - if you expect it to last anyway.
The weak point isn't the crank or the rods, but the tremendous loads that must be endured by the bearings and large sidewall loads on those small stroker pistons due to the sharp angles that result from that big stroke swinging around.
Just remember that 7500rpm with a stroker is akin to 8500rpm with a 2.0L, and the stroker must endure greater loads on top of that. If one has enough money to prep a replacement engine on standby, maybe it won't matter. If however, one would find himself seriously inconvenienced by the prospect of a destroyed engine, he'd be far for the wiser to consider this advice carefully.
The weak point isn't the crank or the rods, but the tremendous loads that must be endured by the bearings and large sidewall loads on those small stroker pistons due to the sharp angles that result from that big stroke swinging around.
Just remember that 7500rpm with a stroker is akin to 8500rpm with a 2.0L, and the stroker must endure greater loads on top of that. If one has enough money to prep a replacement engine on standby, maybe it won't matter. If however, one would find himself seriously inconvenienced by the prospect of a destroyed engine, he'd be far for the wiser to consider this advice carefully.
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