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taibones
12-22-2008, 04:23 AM
i have looked for the past 2 hours for the connecting rod length for a 5sfe can any help me out

Grot
12-22-2008, 04:24 AM
u look in the BGB? im assuming you have...

taibones
12-22-2008, 04:35 AM
i have looked in the bgb and in haynes repair manual on top of that i googled it for an hour

RedRkt01
12-22-2008, 05:27 AM
May I ask why you want this information?

taibones
12-22-2008, 05:38 AM
yes u may i know the rod length of a 3s that was really easy to find and as many sites that i have been to looking everyone says that the 3s rod is a little shorter but no one really seems to know by how much if that doesnt really answer ur question its because im trying to do a write up on an engine i want to build.

Grot
12-22-2008, 05:55 AM
im sure someone on here would know. wait a day or two so the thread will get some views.

RedRkt01
12-22-2008, 01:20 PM
I know how to find the stroke length, but not the actual rod length. I have no idea where to even start looking for that.

ciento44
12-22-2008, 02:40 PM
Pauter makes aftermarket 5sfe rods.... they would have the dimensions. Don't know if it's on their website, but you could call them.

taibones
12-22-2008, 02:42 PM
well i think i will can autozone to see if they know and if that fails me i will just call the local toyota dealership

ciento44
12-22-2008, 02:44 PM
Autozone won't know. Just skip them and try the dealership.

RedRkt01
12-22-2008, 02:52 PM
^+1 for fuck autozone HS dropout idiots

nuclearhappines
12-22-2008, 03:35 PM
if you read up on what it takes to move modify a 5sfe crank for a 3sgte , and you know the stroke diff, between the 5sfe and 3sgte , and you have the 3sgte rod length

you can calculate what you need.

Either that or go to a junkyard and yank a rod and take a measurement.

taibones
12-22-2008, 05:26 PM
3s has a 86 stroke and and a rod length of 138 the 5s has a 91 stroke so thats 5mm diff so would that make the rod 143 in length (in is not inches)

taibones
12-22-2008, 05:29 PM
3s has a 86 stroke and and a rod length of 138 the 5s has a 91 stroke so thats 5mm diff so would that make the rod 143mm in length

taibones
12-22-2008, 05:33 PM
i have a 5s block sitting around but im leaving for two weeks and dont have the time to break it down and messure

RedRkt01
12-22-2008, 06:35 PM
looks like u got it covered

Schmleff
12-22-2008, 07:28 PM
search for "rod ratio" in the na forum. This has been discussed in great detail in the past and contains the rod lengths and ratios.

You will find that the ratio is relatively low, part of what makes the 5S a low reving torque motor...

Hiko
12-22-2008, 07:59 PM
Both the 3s and 5s have rod lengths of 138mm (info from Pauter (http://pauter.com/toyota.htm)) yielding a R/S ratio of 1.517 for the 5s.

Hope this helps with the write-up.

MrTurrari
12-24-2008, 12:13 AM
5sfe
Stock: ~5.433" (I've measured them as long as 5.435")
Crower: 5.433"
Pauter: 5.433" (138mm)

3sgte
Stock: 5.433"
Crower: 5.410"
Pauter: 5.433" (138mm)
Eagle: 5.428"

Basically they are all so close as to be interchangeable except the 3sgte Crowers which are still only .5mm different.

taibones
01-08-2009, 12:59 AM
thanks for the info its nice to see people are still willing to help others even on christmas eve

taibones
01-08-2009, 02:27 AM
--------------------------------------------------------------------------------

i was looking at Pauter Rods for Toyota
the only diff between 5s rods and 2jz rods are length and weight
so if some one like me was going to turbo a 5sfe, i could use the 2jz rods and move the pin further up into the piston

MrTurrari
01-08-2009, 02:49 AM
As cool as that would be it would require a custom piston with the oil ring passing over the end of the pin. You have to move the pin up 4mm. Possible but very custom. If you want to find out how possible and how much it will cost contact Nick at www.atomicspeedware.com.

taibones
01-08-2009, 03:35 AM
how far up could a pin be moved up

taibones
01-08-2009, 04:39 AM
anyone know the deck height of a 5sfe block

MrWOT
01-08-2009, 05:34 AM
Rep to the first person who can tell me why the rod length is ACTUALLY important. :squint:

edit:

On a sidenote, please don't make thread titles like this outside of OT, I want to know what to expect in a thread BEFORE clicking on it.

Hiko
01-08-2009, 08:30 AM
Rep to the first person who can tell me why the rod length is ACTUALLY important. :squint:

I'll make a play for the rep :)

It's because of the rod-stroke ratio. A longer rod at the same stroke, strength, weight, and rpm's is less likely to break. If you can wait a few days, I can put up a much better mathematical reason for it.

MrWOT
01-08-2009, 10:57 AM
Bzzzzt! ;)



Here is Piston Acceleration in FT/Sec/sec at TDC for a Rod Length from 3" to 7.5" every .5" for Bore = 4.0" Stroke = 3.48" RPM = 6500

Rod Length = 3.0" 106147.321178038000
Rod Length = 3.5" 100580.825130727000
Rod Length = 4.0" 96405.953095243400
Rod Length = 4.5" 93158.830400978500
Rod Length = 5.0" 90561.132245566600
Rod Length = 5.5" 88435.742845684200
Rod Length = 6.0" 86664.585012448800
Rod Length = 6.5" 85165.912999711100
Rod Length = 7.0" 83881.336988793200
Rod Length = 7.5" 82768.037779330900


As you can see even reducing the rod length a large amount, ~2 inches, nets a very small change in acceleration. Rod length will affect side loading, but that is also mostly a minor concern.

Try again?

taibones
01-08-2009, 12:21 PM
anyone know the deck height of a 5sfe block

MrTurrari
01-08-2009, 06:10 PM
It's close to zero... within 0.005-0.010". It will depend on your engine and what has been done to it in the past.

MrWOT
01-08-2009, 08:07 PM
Here's the answer.



Here is Maximum Piston Velocity and the crank degrees at which it happens from 3" to 7.5" every .5" for Bore = 4.0" Stroke = 3.48" RPM = 6500

Rod Length = 3.0" Maximum Piston Velocity 6914.815208 FPM @ 65.820819428952 Degrees
Rod Length = 3.5" Maximum Piston Velocity 6643.031628 FPM @ 67.776057182774 Degrees - Peak Piston Flow 289.86 CFM @28 inches of Water
Rod Length = 4.0" Maximum Piston Velocity 6472.195931 FPM @ 69.581948520462 Degrees
Rod Length = 4.5" Maximum Piston Velocity 6356.615443 FPM @ 71.190233579648 Degrees
Rod Length = 5.0" Maximum Piston Velocity 6274.366426 FPM @ 72.607245544772 Degrees
Rod Length = 5.5" Maximum Piston Velocity 6213.598122 FPM @ 73.853563659952 Degrees - Peak Piston Flow 271.12 CFM
Rod Length = 6.0" Maximum Piston Velocity 6167.364000 FPM @ 74.951926748982 Degrees
Rod Length = 6.5" Maximum Piston Velocity 6131.342760 FPM @ 75.923415027890 Degrees
Rod Length = 7.0" Maximum Piston Velocity 6102.719750 FPM @ 76.786409586161 Degrees
Rod Length = 7.5" Maximum Piston Velocity 6079.592782 FPM @ 77.556533635913 Degrees - Peak Piston Flow 265.27 CFM

taibones
01-08-2009, 10:30 PM
if i have a 3s block and put a 5s crank in it and bore it .040 over which it would have the stroke and bore of a 5sfe so changing the stroke to 91mm and boring it over would give me .2 liter more on a 3s engine
(im not saying i am planing on doing anything of the such just wondering if that is the way it works or am i missing something else)