98+ 5sfe block

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Re: 98+ 5sfe block

Postby built2run » Tue Nov 26, 2013 4:48 am

It doesn't work that way. Stroke is measured from the radius not the diameter.....
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Re: 98+ 5sfe block

Postby aus jd 2703 » Tue Nov 26, 2013 4:49 am

I would be very curious if running wet sleeves in a 5sfe block and crank would reliably get more capacity.
what I mean by reliably is the ability to support 600awhp and 8500-9000rpm in a circuit racing environment.
big $$$ but might be a way to get 2.4l with an acceptable rod length and ratio
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Re: 98+ 5sfe block

Postby built2run » Tue Nov 26, 2013 4:50 am

And I think at 4 mm that makes it 2311cc the formula is bore x bore x stroke x .7854 x # of cylinders.
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Re: 98+ 5sfe block

Postby built2run » Tue Nov 26, 2013 4:51 am

600 awhp can be done with a 3S-GTE and stronger fasteners no sleeves no special crank no special anything just a clean unbored 3S-GTE block and good 3S-GTE crank
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Re: 98+ 5sfe block

Postby built2run » Tue Nov 26, 2013 4:52 am

Oh and that can do 9500 rpm with the proper oil system and valve train
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Re: 98+ 5sfe block

Postby MWP » Tue Nov 26, 2013 4:53 am

built2run wrote:It doesn't work that way. Stroke is measured from the radius not the diameter.....


Nope, its not.
http://en.wikipedia.org/wiki/Piston_motion_equations

If you offset grind by 4mm, you are adding 4mm to the radius = 8mm of extra stroke.
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Re: 98+ 5sfe block

Postby aus jd 2703 » Tue Nov 26, 2013 5:03 am

built2run wrote:600 awhp can be done with a 3S-GTE and stronger fasteners no sleeves no special crank no special anything just a clean unbored 3S-GTE block and good 3S-GTE crank


I agree with you but a 2.4l will have more torque, meaning It is better to suited to everything except maybe drag racing where you can nearly always keep rpm's high, especially with launch control of aftermarket ecu's.

fyi for what its worth I have a built 3sgte gen 2 block in my shed waiting for a built head etc, so I am not biased towards a 2.4L, I am honestly just curious about the possibilities.

MWP: 4mm difference in diameter will only net 2mm when offset ground as stroke is relative to the centre of the rod end which can only move 2mm.
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Re: 98+ 5sfe block

Postby MWP » Tue Nov 26, 2013 5:28 am

aus jd 2703 wrote:MWP: 4mm difference in diameter will only net 2mm when offset ground as stroke is relative to the centre of the rod end which can only move 2mm.


:doh:
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Re: 98+ 5sfe block

Postby MWP » Tue Nov 26, 2013 5:28 am

I believe these are the Corollas running near 2.4L 3S's.

http://www.youtube.com/watch?v=ncetsUmS5Gc
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Re: 98+ 5sfe block

Postby built2run » Tue Nov 26, 2013 6:02 am

Well if it does net +8 mm then yeah that's a 2.4 but it will have a horrible rod ratio, won't rev to 8,000 rpm

And it would mean I wasn't factoring in an offset grind. It's + 2mm at the crank when simply machined to fit the 3S-GTE rods adds the 4mm total stroke

So yeah your right I've just not had the need to do this nor had anyone have me build one that way

I'll have to do more car math to figure rod ratio and max rpm. There is also a deck height issue that may have something to do with this
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Re: 98+ 5sfe block

Postby built2run » Tue Nov 26, 2013 6:12 am

So definitely requires custom pistons, but yeah won't be a rev happy 2.4 at least it's possible
"straight lines r 4 fast cars, turns r 4 fast drivers" Colin McRae.
ST165, black: parted and gone
ST165, white: rear ended by ass hat
ST165, white: sold to friend
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Re: 98+ 5sfe block

Postby MWP » Tue Nov 26, 2013 11:33 am

Modern piston materials & piston coatings have made a lot possible.

The 2.4L 3SGE engines i talked about will be hitting 8k or more very reliably.
Next time i talk to the guy responsible for them (TRD aus head mechanic) ill try to get some more details.
Im guessing he wont want to give too much info away though.
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Re: 98+ 5sfe block

Postby underscore » Tue Nov 26, 2013 4:49 pm

^ just get him drunk first, then get us some juicy TRD secrets :wink:
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Re: 98+ 5sfe block

Postby built2run » Tue Nov 26, 2013 8:12 pm

Well yeah if it's within the proper piston speed (rpm is directly related to piston speed) I'm sure it will last fine
"straight lines r 4 fast cars, turns r 4 fast drivers" Colin McRae.
ST165, black: parted and gone
ST165, white: rear ended by ass hat
ST165, white: sold to friend
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Re: 98+ 5sfe block

Postby built2run » Tue Nov 26, 2013 8:16 pm

Wait but the measurement is centerline to centerline not overall diameter of the crank (my mistake above) but that does make for +4mm total :/
"straight lines r 4 fast cars, turns r 4 fast drivers" Colin McRae.
ST165, black: parted and gone
ST165, white: rear ended by ass hat
ST165, white: sold to friend
ST185, black: current project, "The Kraken"
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