1FZ-FE Failed, help decide what to do (1 Viewer)

[scottryana]

For moderate power this engine does not need to be forged. The connecting rods are 2lbs a piece over 910g. The bottom end is beef.

 

[samiam09]

I picked up the other 1FZ today and will refresh it and leave it stock. If I get bored and want to dump money into it I may do a forged build on the engine I pull out later down the road and boost it. For now Ill just get it running



That was the plan until I found a 140k mile 1FZ in need of a refresh for $200 today that will be cheaper than rebuilding my current and will get me running faster



I do all my own work and am no stranger to modified cars that nobody else will work on. My Passat goes back to the dealer only because it is under warranty.

This is my fun vehicle



I only do my own work, never let anyone else touch my stuff unless its free warranty work. The 4.3 swap would be cool. My dad's Sonoma with a 4.3 got 20mpg round trip going to get my new 1FZ today. Thats the only way a truck with a 1FZ will get 20mpg lol. It has to be in the bed

well running threw a 4l60 trans and two reductions boxs with 4.88 gearing a 35 's i get maybe 13 mpg nowhere near the 20 I was hopeing for

 

[dogfishlake]

If you have a spare that looks decent, pull the head, put in new valve seals, inspect the cylinders, do a valve job if needed, new oem head gasket, maybe check bearings because you can. Bolt back together and get a turbo kit when they come out. Cheap, reliable, easy. My opinion of course. Yours may vary, but keep us posted on what you choose and how it goes. Lots of us in this boat right now.

 

[baldilocks]

A forged build?? What are you wanting 1000 hp? The 1fz bottom end is already pretty damn tough. That’s why they last so long at the 200hp level.

 

[Technician1985]

I wonder how much power you could get from a 1z and a modest ~8psi turbo setup with a good exhaust. I can't imagine less than 300hp from an engine that size, though personally I'd be more interested in midrange torque gains. I want to turbocharge my truck eventually but it has a 3F-E. I'm thinking a turbo 3F-E (or 1z for that matter) tuned for midrange torque would be more than a match for many older American V8's. I have been borrowing a 5.7 blazer lately and it isn't impressive. Not to mention turbos sound way cooler IMO, only issue is heat management.

 

[bwakeling]

Isnt there a stroker kit available? The appeal of sticking to the 1fz is not having to change gears and under the hood accessories will be the same.

 

[MPolley]

For moderate power this engine does not need to be forged. The connecting rods are 2lbs a piece over 910g. The bottom end is beef.

I keep forgetting how beefy these things are. Heavy ass rotating assembly that won't fail, but kills fuel economy lol

If you have a spare that looks decent, pull the head, put in new valve seals, inspect the cylinders, do a valve job if needed, new oem head gasket, maybe check bearings because you can. Bolt back together and get a turbo kit when they come out. Cheap, reliable, easy. My opinion of course. Yours may vary, but keep us posted on what you choose and how it goes. Lots of us in this boat right now.

This engine I just bought is gonna get a quick re-ring and new,bearings/gaskets/seals and go in so the truck will be back up and running. Idk what Ill do with the old engine yet but boost or something may happen down the line

A forged build?? What are you wanting 1000 hp? The 1fz bottom end is already pretty damn tough. That’s why they last so long at the 200hp level.

Im not used to thinking about these massive engine components. Most engines need forged to go over a few lbs of boost

I wonder how much power you could get from a 1z and a modest ~8psi turbo setup with a good exhaust. I can't imagine less than 300hp from an engine that size, though personally I'd be more interested in midrange torque gains. I want to turbocharge my truck eventually but it has a 3F-E. I'm thinking a turbo 3F-E (or 1z for that matter) tuned for midrange torque would be more than a match for many older American V8's. I have been borrowing a 5.7 blazer lately and it isn't impressive. Not to mention turbos sound way cooler IMO, only issue is heat management.

Those 80s-90s 5.7s only made like 150hp because they were so choked down by emissions. The later LS series engines are much better, a dime a dozen, compact and light compared to the 1FZ. Plus better fuel economy. As little as I drive the rig, though, the fuel economy savings wouldnt offset swap costs

Isnt there a stroker kit available? The appeal of sticking to the 1fz is not having to change gears and under the hood accessories will be the same.

This is true, but the downside is no parts stores usually have 1fz parts in stock so it is all special order. They have everything in stock for a 5.3 out of a mid-00s Silverado. A little more complicated to set up, but replacement parts are more available

I might do a stroker or turbo build on tje original engine after I get this newer one freshened up and stuffed in, not sure yet. There are a lot of options with the 1fz, but it is really expensive to get to the 30php a v8 comes with stock

 

[Heckraiser]

Step 1: Plunk in used 1fz
Step 2: search your soul for a few months

I really like LS swaps as a concept, but I think it would be a lot cheaper and easier to stick with the toyota drivetrain. I know for a fact you can turbo your 1fz for under $2500 (BTDT). If you rebuild your blown engine while it's out with fresh everything (no need for aftermarket parts, just a refresh), turbo with stand-alone management, you will have all the power of a V8 (or more, depdning on the v8) at a lower overall cost. Only tradeoff being typical 1fz fuel economy.

 

[MPolley]

Step 1: Plunk in used 1fz
Step 2: search your soul for a few months

I really like LS swaps as a concept, but I think it would be a lot cheaper and easier to stick with the toyota drivetrain. I know for a fact you can turbo your 1fz for under $2500 (BTDT). If you rebuild your blown engine while it's out with fresh everything (no need for aftermarket parts, just a refresh), turbo with stand-alone management, you will have all the power of a V8 (or more, depdning on the v8) at a lower overall cost. Only tradeoff being typical 1fz fuel economy.

That's the plan. Refreshing this used 1fz because it sat for 2+ years, and then deciding what to do next. If I hadn't found a used 1fz for $200 like I did, I wasnt going to spend money on rebuilding the original. It's a beefy powerplant, but power and fuel economy are both sub-par compared to swap options

 

[White Stripe]

If you are refreshing the used 1fz, think about porting and polishing the head. Adds power and fuel economy. You could send it out or read up on doing it yourself. Power gains can be significant, and if you do it yourself its pretty cheap.

 

[gbogh]

Where's the rebuild thread already?!