did you know...

**mazda-head** · 4-6-07, 12:59

that a 94mm F2T crank, in a FE3 block using FE3 152mm rods, will give the 2.2DOHC a rod to stroke ratio that IS almost exactly the golden section! That has got to account for something... DaVinci inspired engine geomtries lol

r/s ratio of 2.2DOHC = 1.6170212...
golden section ratio = 1.6180339...

thats pretty close eh? I wonder what effects it has on the engine...

**fredio54** · 4-6-07, 17:00

How long is the f2t rod?

neogenesis2004 · 4-6-07, 17:28

I believe it is 160mm. Or very close to that.

**fe3t b2200** · 4-6-07, 19:07

fe3 rods are 150mm not 152mm. fe sohc has 152mm rods my eagle h beam 6 inch chev rods are 152.4mm giving a rod ratio of 1.6212766

letmeSHOu · 4-6-07, 19:21

not familar with that term?)golden section

neogenesis2004 · 4-6-07, 19:46

I don't know where he got the section part from. Its just called the golden ratio. Golden ratio - Wikipedia, the free encyclopedia

**mazda-head** · 4-6-07, 22:26

lol
i wanna build a golden section engine

**mazda-head** · 4-9-07, 13:11

Quote:

Originally Posted by fe3t b2200

fe3 rods are 150mm not 152mm. fe sohc has 152mm rods my eagle h beam 6 inch chev rods are 152.4mm giving a rod ratio of 1.6212766

sweet!! these rods are almost exact FE-sohc rod dimensions!!

if i buy a set, doest anyone wanna go halfsies?

**fe3t b2200** · 4-9-07, 16:39

just buy 4 individualy! i did

**mazda-head** · 4-9-07, 20:04

Quote:

Originally Posted by fe3t b2200

just buy 4 individualy! i did

yeah? howd u hook that up?!

**fe3t b2200** · 4-10-07, 4:15

pro parts palmerston north nz ordered four singles in from usa

**LMB__** · 6-2-07, 13:21

witch pistons to use? ive got a spare fe soch engine, so if i took the rods from it, and combine with f2 crank, and some pistons that fit? witch pistons?

**fe3t b2200** · 6-3-07, 19:17

im using sr20 pistons with the crown machined down about 2mm

**LMB__** · 6-4-07, 15:13

so if i use the orginial fe3 rods, i could buy a set of sr20 pistons and machine it down 2mm and it will work withoud modifing the block or head?

**fe3t b2200** · 6-4-07, 15:37

no im using 152mm sohc rods you could use stock 150mm rods with no mods

4-6-07, 12:59	#1 (permalink)
mazda-head Join Date: Feb 2001 Location: Canada Age: 29 iTrader: (0)	did you know... that a 94mm F2T crank, in a FE3 block using FE3 152mm rods, will give the 2.2DOHC a rod to stroke ratio that IS almost exactly the golden section! That has got to account for something... DaVinci inspired engine geomtries lol r/s ratio of 2.2DOHC = 1.6170212... golden section ratio = 1.6180339... thats pretty close eh? I wonder what effects it has on the engine...

4-6-07, 17:00	#2 (permalink)
fredio54 Join Date: Aug 2004 Location: Auckland, New Zealand iTrader: (1)	How long is the f2t rod?
	DIYEFI.org - TRUE DIY engine management Mazda FE3/FE-DOHC Master Index Thread (work in progress) Mazda truck with FE-DOHC/FE3 "BIG like your house" Holset Turbo drinking 2.2 litres of fuel per minute ~= 385hp crank RIP SleepCounter :-( we will miss you! - RIP fredio54 :-( will we miss you?

6-2-07, 13:21	#12 (permalink)
LMB__ Join Date: Feb 2006 Location: Hedmark, Norway iTrader: (1)	witch pistons to use? ive got a spare fe soch engine, so if i took the rods from it, and combine with f2 crank, and some pistons that fit? witch pistons?
	The Norwegian Reinforcement Squad Mazda 626 2.3i 16v DOCH 1988 Mazda 626 2.2i 4WD 1990 (soon to be turbo?)

6-4-07, 15:13	#14 (permalink)
LMB__ Join Date: Feb 2006 Location: Hedmark, Norway iTrader: (1)	so if i use the orginial fe3 rods, i could buy a set of sr20 pistons and machine it down 2mm and it will work withoud modifing the block or head?
	The Norwegian Reinforcement Squad Mazda 626 2.3i 16v DOCH 1988 Mazda 626 2.2i 4WD 1990 (soon to be turbo?)

4-6-07, 17:28	#3 (permalink)
neogenesis2004 Join Date: Jan 2007 Location: iTrader: (0)	I believe it is 160mm. Or very close to that.

4-6-07, 19:07	#4 (permalink)
fe3t b2200 Join Date: May 2006 Location: palmy north, new zealand Age: 25 iTrader: (0)	fe3 rods are 150mm not 152mm. fe sohc has 152mm rods my eagle h beam 6 inch chev rods are 152.4mm giving a rod ratio of 1.6212766

4-6-07, 19:21	#5 (permalink)
letmeSHOu Banned Join Date: Feb 2007 Location: iTrader: (0)	not familar with that term?)golden section

4-6-07, 19:46	#6 (permalink)
neogenesis2004 Join Date: Jan 2007 Location: iTrader: (0)	I don't know where he got the section part from. Its just called the golden ratio. Golden ratio - Wikipedia, the free encyclopedia

4-6-07, 22:26	#7 (permalink)
mazda-head Join Date: Feb 2001 Location: Canada Age: 29 iTrader: (0)	lol i wanna build a golden section engine

4-9-07, 16:39	#9 (permalink)
fe3t b2200 Join Date: May 2006 Location: palmy north, new zealand Age: 25 iTrader: (0)	just buy 4 individualy! i did

4-10-07, 4:15	#11 (permalink)
fe3t b2200 Join Date: May 2006 Location: palmy north, new zealand Age: 25 iTrader: (0)	pro parts palmerston north nz ordered four singles in from usa

6-3-07, 19:17	#13 (permalink)
fe3t b2200 Join Date: May 2006 Location: palmy north, new zealand Age: 25 iTrader: (0)	im using sr20 pistons with the crown machined down about 2mm

6-4-07, 15:37	#15 (permalink)
fe3t b2200 Join Date: May 2006 Location: palmy north, new zealand Age: 25 iTrader: (0)	no im using 152mm sohc rods you could use stock 150mm rods with no mods