Real Fiero Tech

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.

I can't see Ben keeping cams in stock. The overhead would be thousands for him to do that, and he doesn't have that kind of money. All the cams he provides are essentially custom cams. He has to call comp and give them grind numbers. If you call comp directly they can make that same cam without Ben'...

Kinda curious what the lz4 rods can handle power wise. I checked some calcs and the 3.9 at 6500 rpm has a piston speed of 59.76 fps. The 3.5 at 6500 has a piston speed of 54 fps or about 10% less. I'd imagine the stresses on the 3.5 rod would be much less. However I imagine that since the lz4 rods i...

Jumping right in. Just gonna hook everything back up as before

I put a set of my LZ cam bearing spacers and new bearings in this 3500 and I think I am going to give it a rip. See what a cammed lz4 will make power wise.

And hopefully make power all the way to 6500 vs falling around 5600 as before.

Yes steal. 4340 I think. They make Ti rods too but I'm not doing that

I didn't watch it yet but it's Vizard on headers.

https://youtu.be/f72BMpmoGMY

$1710 plus shipping with about a 10 week lead time. There are a few details I need to finalize with Pauter first before I order but I think this is the way I have to go if I want to make reliable power over 500 whp

Yea I think that will point right towards the axle though. It might clear pending how tight a bend you need or can get away with.

Just something to keep an eye out for. 72 new is dirt cheap though. Wow.

Then do something similar to the 3800 guys. C__Data_Users_DefApps_AppData_INTERNETEXPLORER_Temp_Saved Images_PICT0031.jpg I also remember making a video. I don't think the trunk would have to be cut to fit the piping. I was talking about using a turbo here which would require trunk cutting. So this ...

I t. https://www.ebay.com/itm/155378021375?chn=ps&mkevt=1&mkcid=28 So maybe keep the stock firewall side, use something like this for trunk side, merge them under the trunk. Crossover then can maybe be wiggled enough to clear the clutch arm, as it won't be tied to the trunk exhaust manifold...

You might disagree but I think the firewall side manifold is designed pretty good. I'd keep that, and the crossover, and build a new trunk side manifold mating into the crossover somehow. The trunk side manifold narrows down to a 1.8 inch hole for all 6 cylinders. It's very restrictive. So if it wer...