Inside the 1FZ......

[MS-75]

Hi all.

Whilst I’ve had the 1FZ completely apart for the first time since I bought it (4-5 years ago) I figured I’d take some pictures of the bits so you can see what makes it tick.

I’ve had it apart to get on top of the head sealing gremlins it’s been having at 20+psi boost. Although the 1FZ shares a lot with the 1JZ and 2JZ:worship: , the one damn thing it lacks is a steel head gasket, and the standard Toyota composite one ($280 each-ouch) has been coming up short-even with head studs.

I decided to bite the bullet and get it O-ringed/receiver grooved and change to a copper head gasket, hence the motor had to be fully stripped and sent off.

(Interestingly, all the bearings are like new, so I left all that alone.)

So anyway, here are some of the crucial bits of Mr Toyota’s brilliant 1FZ.

Engine block and webbing. Note the oil squirters for piston cooling.




Here's the deck of the block with the receiver grooves machined in it.



Here is the MOTHER OF ALL CRANKSHAFTS. The casting is really nice, but OMFG is it heavy. It weighs in at 37kg (81.5 lbs) and is 800mm long!!!!!!!!!!!1111111 No wonder it hasn’t let go………..





Here’s a piston and rod. Note the rod is a decent length. Despite the long stroke, the motor has proven itself happy to rev, which I believe is due to the decent stoke to rod length it has. (makes for a very tall motor though-hence oil cap sticks out through a hole in the hood…..)

The Arabs rev them to 8000………….(strengthened bottom end of course though)



Here’s the new copper gasket I drew up and had machined. It’s 40thou thick at the recommendation of the machine shop that did the o-ringing.



Here’s the head-note that the combustion chambers are not standard. I removed material to drop cpmpression.



Here’s a close-up of the o-rings.



Here’s the intake ports. This is also another reason why I reckon ot works so well-look how the ports are at a 45 deg angle straight down to the valve-nice and open.

Note the ports are still untouched (I am lazy, lazy, lazy)





And finally, here is the other reason I’ve gone overboard with the head retention/sealing. Should be interesting.

With the gas on, I’m hoping it’ll go mid to high 500’s-cross fingers………..




It should be back on the rollers in 3 weeks, with the NOS running shortly after that.


The saga continues.

Discuss, critique and/or bag at will gentlemen.

Sean

PS my wallet hurts

[JetspeedCamry]

Was this engine used in the Landcruiser? Thats a big six! Some good enginerring in it, and love your work with the headgasket/o-ringing. Was this hard to archieve in terms of cost? Did you use the stock HG as the template, or new from scratch?

[takai]

Good to see that you posted these up here Sean, i was about to gank your post off PF and pass them off as my own

[chris davey]

Lovely piccies

That certainly is a monster crank.

Good luck with it.

[oldcorollas]

That certainly is a monster crank.

LOL, took the words out of my mouth


oh, as for coolant sealing etc..i wonder if anyone has tried using silicon sheet/rings to try and do the job. it will survive the heat, and with the correct squish, will survive the pressure.

[MS-75]

Yeah-I should have put it here first, but I've been struggling to log in here from my work internet.

It keeps chucking me back out and asking for username/password.

Probably something to do with the firewall or some technical IT shit like that.

Goddamn white-mans-magic.

[Killswitch]

Go the cruiser motor! Following your use of this engine has made me want to strap a GT42 to the side of our 80's series and run 12's but the pocket says no

What was the highest power & torque figures were you making on pump fuel? Oh, and you say its happy to rev, what've you revved it to?

(if this has been covered elsewhere I'm sorry! )

[takai]

Yeah-I should have put it here first, but I've been struggling to log in here from my work internet.

It keeps chucking me back out and asking for username/password.

Probably something to do with the firewall or some technical IT shit like that.

Goddamn white-mans-magic.

Hahahha, the message you left made me laugh so hard i choked on my sub. Woosh.

[thechuckster]

query: the thru holes in the copper gasket for the coolant appear pretty small (in the pic of gasket sitting on the assembled block ... is this a deliberate attempt to slow flow of coolant from block to head or to do with cutting odd-shaped holes in the gasket?


btw - great car & engine - 1FZ is the next 2JZ? :-)

[Valkyrie]

Hi,
For the IT tech shit try (In Internet Explorer) -

tools

internet options

privacy

lower to medium

Random IT tip for the day.

I think that engine would snap my poor little TA22....

That crank reminds me of a 265 crank. Farken huge!

Cheers

PS If it works, feel free to rep me as I have a cool Avatar waiting...

[MS-75]

Chuck-those holes all match the holes in the std gasket.

Have a look down the back of the gasket and you'll see a larger slot and two larger holes. That's so the coolant flows up from the back of the head, rather than short-circuiting through big holes up the front.

As for the design of the gasket, I copied the outline of a standard one on CAD. It took a while to tweak it so it was right, but it dropped on first go when I got the machined piece from Ridgecrest.

Highest power on pump was maybe 320, but at that point I was changing fuel anyway-not because i'd reached the limit. I'm sure it could make 400+ on pump, but I like race fuel as it's cheap insurance.

In total, the o-ringing machine work copper gasket cost cost $1000, head studs cost $250 and valve-springs $310. Nos was $430 off ebay, but I still need a bottle heater.

ouch

[takai]

Thats not bad. The IPRA bottom end will be costing about 2k without even thinking about the top end.

[Mr DOHC]

Nos was $430 off ebay, but I still need a bottle heater.

ouch

not at the jamboree, hey shane

[chris davey]

must be cold down south!

[Mr DOHC]

so i've heard, will u be at the sydney jambo next year sean