Real Fiero Tech

Reis engines don't last long enough to need dry sumps either.

Fieros aren't going around corners at sustained 1g Will. This discussion is a total waste of time when it comes to fiero owners and how you drive these 80s shit boxes.

Dry sumps aren't necessary in our applications. But you goofballs build it and install it. It's your time and money.

Nah. It's ready to go in, just haven't done it yet.

It was cheap, and at first I thought it was a 3900, but turns out it was a 3.5. So I figured I'd play with it, see what it could do. 135k miles junkyard Sbe Comp cam 218/236 and around 560/590 lift Pac1218 Arp head studs. That's it. I am reusing one of the 3.5 heads which I swapped the springs onto ...

Looks like a dump

ericjon262 wrote: ↑Fri Apr 14, 2023 9:31 pm today I learned that there's a machine shop near me that grinds camshafts... I might reach out about the idea of having a 3900 cam reground.

Excellent. Keep us posted

Here is my opinion but you won't like it. Ditch the idea of a windage tray and or crank scraper. At the end of the day it's a lx9 engine from gm. It's not a formula 1 engine. Not having a crank scraper isn't gonna give you a noticeable loss in power nor is it gonna do anything measurable for oil in ...

Did you check into having 4.3 V6 rods narrowed like Upson (I think?) did? I thought some variation of the 4.3's have the same 2.250" rod journals as the LZ4/LZ9 do. You'd need custom pistons to set the piston deck correctly, but those are cheaper than custom rods. Going to do an unboxing video...

99% sure pickardt performance is not the ls4 oil pan guy.

Moroso oil pan was done by a guy building monte carlos and mating them to 4t80s.

I actually had the same idea when I had my ls4 and found his oil pan by accident while researching options.

Yea I'm swapping over to an lz4 for the time being. Maybe I'll have the Pauter rods in a built engine ready to go by the winter or next year depending on my motivation. I am going to use my comp cam in the lz4 too that I had in my built 3.9. If you order a lnj cam, you might be able to send it off t...

It will work just fine. What were your current cam specs

zok15 wrote: ↑Wed Apr 05, 2023 1:51 pm.

It's a stock vvt cam with no vvt control(?) vs the street strip cam

I am very interested in spec-ing my own cam, after lots of research I do not think the reverse pattern Strip Cam is going to suit the LZ9 very well as the intake ports greatly outflow the exhaust ports. I do want to dyno it first and then see what I can pick up with nothing but a cam change. If you...

I'll have pics in 10 weeks

Eric weingartner on YouTube will flow the heads either stock or ported, and give you the results. And it's cheap. Maybe 30 plus the shipping. He has a professional bench too.

With the splayed valves I clean the flashing out throughout the port, and blend the bowl. I also open the throat to around 90-91% Without back to back flow testing, there is now way to know what works best and fiero owners aren't gonna invest just for these heads which I don't blame them. I wouldn't...

Interesting. It def pays to know how to do this stuff

Do you have valve opening and closing events in relation to crank degrees?

Opening and closing events are just as important as overall duration numbers

I installed my old 1615 grind comp cam that I bought 15 years ago into this lz4. Since the piston comes up about .035 higher in the bore vs an lz9, I wanted to verify piston to valve clearance. Here are the cam specs. 225/227.6 duration @.050", .565/.526" lift w/ 1.5 rockers, 111 ICL, 111 ...

Here was the cam specs from my lx9 with the itb setup.

Don't know the vacuum it would make with a stock intake. It idled decent with the itb though.

225/227.6 duration @.050", .565/.526" lift w/ 1.5 rockers, 111 ICL, 111 LSA


Maybe you could input those numbers and see what you get.