View Poll Results: 2.0, 2.3 stroker or other
2.0
13
33.33%
2.3 stroker
26
66.67%
Multiple Choice Poll. Voters: 39. You may not vote on this poll
2.0 or 2.3 stroker
getting excited
Mar 14, 2006, 08:32 PM
#62
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a local shop.Im trading out some work for them to get the machine work done.I would love to do head work too since labor is going to be cheap.Gotta find a good deal on springs and valves.Whose got the best deal?
Mar 14, 2006, 09:34 PM
#64
Originally Posted by CDeutsch
Wow I feel like I just went back in time 4 years to the land of DSMTalk. Same arguements for sticking with a 2.0 were being thrown around back then. Fast forward to present day and almost every new DSM build is a 2.4.
Excluding cost there are no downsides to going bigger, only upsides. All the "I want to rev" talk is crap.
Excluding cost there are no downsides to going bigger, only upsides. All the "I want to rev" talk is crap.
RPM is not a good thing in an engine that needs to live long. RPM is required in drag racing. People just don't understand drag racing class rules, weight breaks, the influence of an induction delimiter (N20), gearing for trap speed.
Piston speed, turbo powerband, sideload.. those are not the issues.
1) No one is able to give a figure for piston speed and describe the failures that accompany mentioned number. The issue is piston acceleration and that is a function of engine speed, stroke, rod length. Piston speed ties in roughly but is not a direct factor. Piston speed ends up at certain figures with certain engine types because of geometry and component masses. It is coincidence though. There are engine types that do not fit the set and piston speed doesn't tell you anything. Why take the chance with 'summary' piston speeds? Just work off acceleration and masses and know for sure. Current F1 mean piston speeds are in the range of 24-25m/s. In the early 90s they were in the 27+m/s range due to longer stroke. Sporty road cars as in the 25-25+ m/s mean piston speed range. Mean piston speed, max piston velocity, they tell nothing by themselves.
I've seen engines turn 33m/s mean piston speed, 55m/s max instantaeneous piston velocity, and there were no failures due to the surface speeds. Failure came from inertia load.
2) Turbos operate on heat and massflow. Neither is tied to engine speed alone. Massflow is a product of engine size and engine speed.
3) Normalize for flow and sideloads are not higher, or not appreciably higher, and occur at a lower cycle rate.
Last edited by ShaunSG; Mar 14, 2006 at 09:47 PM.
Mar 14, 2006, 10:35 PM
#65
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Location: Louisville, KY
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Originally Posted by EEvo
I want a gt35r someday....2.3 would be better?
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