2FE Build Suggestions

[BDSeff1fitty]

Headed down to the machine shop today to drop it off. Will report back with what I decide to do when I get back from there

Maintenance sure wasn't a priority with previous owners

 

[RockDoc]

From what I've seen on mud and in the few engines I've been in 3FEs generally seem to be dirtier inside than 2Fs, but that is gross.

 

[BDSeff1fitty]

Got the engine dropped off this afternoon, have to go pick up a 2f fly wheel (for the balancing) from a friend and drop off the cam as well tomorrow.

They do not do port/polish work so I'll see what this ends up costing me and decide if it's worth it to me or not.

Also, going to drop off the 3fe block for blasting with them so I can have a living room table at the house

 

[Moby]

The 'tried and true" approach with the 2F would be to move to a cam in the 260* range, bump the compression, open up the exhaust flow and increase the intake as well. In your case, the EFI will handle that last bit just fine with no questions about compromising the low

As an additional point of reference I ran a wideband o2 permanently mounted on my 2FE and the stock EFI does just fine, perhaps a little rich for an N/A engine during open loop but not bad (~11:1). My emissions were consistenly better than the stock tired 3FE. My 2FE was .030 over, balanced, ported head, stainless valves, custom cam, TLC air intake, ported throttlebody, rebuilt and balanced injectors, and a custom 2.5" exhaust (2" from the manifolds into a dual entry, single 2.5" exit). I later converted the MAF to a programmable AFM and datalogged the o2 output while tuning the AFM and I never ran out of injector capacity. I think I calculated the stock threshold at 210-220 hp@100% duty cycle. Also ran a J&S safeguard and a ton of advanced (let the J&S close loop control timing right at the knock threshold). Short of a turbo I think it is hard to exceed the capacity of the stock EFI.

Enjoy your build

 

[PabloCruise]

Looks like a cool thread!

 

[Yspen]

.40 over is as big as you can go. There is NO .60 even though there were pistons that size at one time

I assume you refer to aftermarket parts . My build used 60thou over two years ago and it was OEM pistons ordered the Toyota agents . More expensive than aftermarket but it is still available .

BTW , I used the Delta 250S cam and will not swop it for any other .

 

[PabloCruise]

I later converted the MAF to a programmable AFM...

Do you have details posted somewhere here that I could read up on how you did this?

 

[TobyB]

perhaps a little rich for an N/A engine during open loop but not bad (~11:1).

jeepers, just a little... I was targetting 13.4:1 when racing, and that kept valves
(and heads) alive for seasons...

t

 

[Stumpalama]

Mark W: what are your thoughts on headers on a 2FE? I have read there is not much to be gained over the stock manifold.

 

[BDSeff1fitty]

Just got back from the machine shop dropping off my cam, crank pulley, fly wheel etc.

head is cracked... Know of one locally so just waiting on a price for the bare head.

On the upside, now I will have a more complete coffee table

 

[Moby]

Do you have details posted somewhere here that I could read up on how you did this?

Here: https://forum.ih8mud.com/60-series-wagons/487202-3fe-maf-afm-conversion.html

Make sure that you read post #21, the off the shelve unit won't work, Split Second made a custom unit for me that allowed me to dial in the elevation compensation function for our trucks.

 

[Moby]

jeepers, just a little... I was targetting 13.4:1 when racing, and that kept valves
(and heads) alive for seasons...

t

It was high 11s but yeah, still rich. I don't have stock data to compare to but it wouldn't surprise me if stock WOT A/F was close to this range. OEMs run (or did in the 80s/90s) on the richer side for safety. Especially on a car without a knock sensor where a little richer under high load is going to help protect against detonation. And emissions didn't test WOT so there wasn't a government constraint to restrict this "rich for safety under load" approach. My assumption was that the added volume and modifications of the 2FE skewed the WOT open loop tuning to be just a little richer than what the factory would have been. But again, I don't have before and after wideband O2 data to make that statement definitively. I do know that I never saw it go lean under any conditions.

But the WOT A/F was why I went to a programmable MAF and a J&S Safeguard knock sensor. I picked up ~1mpg while still running a very safe A/F ratio under all load and conditions.

 

[PabloCruise]

Here: https://forum.ih8mud.com/60-series-wagons/487202-3fe-maf-afm-conversion.html

Make sure that you read post #21, the off the shelve unit won't work, Split Second made a custom unit for me that allowed me to dial in the elevation compensation function for our trucks.

Thanks!

Looking forward to getting to read this...

 

[PabloCruise]

Mark W: what are your thoughts on headers on a 2FE? I have read there is not much to be gained over the stock manifold.

I recall a post by Mark saying that you are hard pressed to do better than the 3FE manifolds, but a good, free-flowing exhaust behind those can add a little...

 

[BDSeff1fitty]

Called the machine shop today, apparently they are not competent enough to do the SBC valves in my head. Told them not to touch it and having someone go pick it up for me by the end of the week. Really irritated as they have had the head for nearly a month and have done absolutely nothing to it during that time.

 

[PabloCruise]

Frustrating!

Question: does the 3FE head need the oil galley plug mod like the 1 & 2 F heads?

 

[RockDoc]

Frustrating!

Question: does the 3FE head need the oil galley plug mod like the 1 & 2 F heads?

Yes....