Real Fiero Tech

Are the block casting numbers different? It doesn't look like there's enough iron to move that bolt hole outboard 4mm The earlier blocks have the bolt pattern the same as the 2.8. there is no need to move the bolt hole out further Eric is saying the lz9 is out a bit further. But it's close enough w...

Got the intakes, valve covers and pushrods out. Still need to remove timing assembly and lifters, then the lnj cam can go in

Interesting idea on the mount. We could do a test fit and give feedback if you want and take some pics.

I've got the front torn off and prepping for the lgd cam swap.

The Dark Side of Will wrote: ↑Fri Nov 17, 2023 2:39 pm I thought the 3900 had the upper water manifold at the back. I guess I was wrong about that.

Are the water manifolds two separate pieces or one large cover as with the Gen II & III engines?

The water manifold is one piece but it's separate from the timing cover.

There is no upper bolt hole.

Mounted. Easy.

Gotta trim/grind the front mount like you do on the dohc 3.4 swaps. I also trimmed some excess webbing on the oil pan. A bit off the pan and a bit off the mount instead of it all off the mount. But that's it.

Engine is off the cradle I'm kind of interested in trying to see if using the factory front cover and water pump assembly will be too difficult or just swap over to the fiero stuff. Coolant hose routing and alternator packaging are the big concerns with using factory LZ components. I'll have to mock...

Make offers. Crossover, heads, exhaust manifold, engraved plenum, middle and lower with sensors.

That will prob peak close to 6800 if you have the intake manifold to support it.

It's gonna have some serious chop at idle

Looks great in there

They clear the block.

I am building a whole new lz9 with the Pauter rods so nothing from this lz4 will transfer over. I'll keep it as a backup for sure or for r&d.

eHoward wrote: ↑Fri Nov 03, 2023 9:45 pm Looks great!

Did you fab or buy the k20 mounts?

It looks like he bought the mounts from Steven, but didn't like them so he made his own. Kind of disappointed to hear about the purchased mounts not panning out.

Old 2.8 and cradle is out.

Doing this swap for Howard. Initial mock up shows there might be a clearance issue with the shift cables for the trans, once the adapter and tb go on. We shall see.

I'll post more updates as the swap progresses.

Maiden voyage with the 3.5 today. She runs good. Sounds healthy. No boost today. I just wanted to see where the fuel trims were going to be vs the 3.9 on a stock cam. A decent amount was pulled on this new tuneup. I don't have exact percentages to share at this time however. We'll see what happens.

The Dark Side of Will wrote: ↑Thu Oct 19, 2023 10:12 am If the oil leak contaminates your clutch, you'll be that much more frustrated and pissed off at it... and still have to pull the engine.

I said the same thing to Howard actually.

It still leaks oil and it's def coming from the bell housing area so it's gonna have to come back out.

But I think I'll try to put a couple miles on it first and do some pulls and see how it feels on 14 lbs. Maybe a Dyno just to see where it sits powerwise? Lmk what you think.