Search found 6861 matches
- Tue Apr 04, 2023 4:12 pm
- Forum: Technical Conversations on Pontiac Fieros
- Topic: Splayed Valve Heads Porting
- Replies: 8
- Views: 1783
Re: Splayed Valve Heads Porting
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...
- Mon Apr 03, 2023 6:40 pm
- Forum: Fiero Maintenance
- Topic: Zettner-type brake bracket drawings
- Replies: 9
- Views: 2277
Re: Zettner-type brake bracket drawings
Interesting. It def pays to know how to do this stuff
- Sun Apr 02, 2023 1:06 pm
- Forum: Pontiac Fiero Discussion (General Non-Technical)
- Topic: progress on the banshee...
- Replies: 1259
- Views: 368527
Re: progress on the banshee...
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
Opening and closing events are just as important as overall duration numbers
- Tue Mar 28, 2023 10:29 pm
- Forum: Technical Conversations on Pontiac Fieros
- Topic: LZ4 3500 rod info and forged Pistons options.
- Replies: 34
- Views: 4154
Re: LZ4 3500 rod info and forged Pistons options.
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 ...
- Tue Mar 28, 2023 2:27 pm
- Forum: Pontiac Fiero Discussion (General Non-Technical)
- Topic: progress on the banshee...
- Replies: 1259
- Views: 368527
Re: progress on the banshee...
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.
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.
- Sun Mar 26, 2023 7:27 pm
- Forum: Pontiac Fiero Discussion (General Non-Technical)
- Topic: progress on the banshee...
- Replies: 1259
- Views: 368527
Re: progress on the banshee...
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'...
- Tue Mar 21, 2023 8:25 am
- Forum: Technical Conversations on Pontiac Fieros
- Topic: LZ4 3500 rod info and forged Pistons options.
- Replies: 34
- Views: 4154
Re: LZ4 3500 rod info and forged Pistons options.
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...
- Mon Mar 20, 2023 8:53 pm
- Forum: Technical Conversations on Pontiac Fieros
- Topic: LZ4 3500 rod info and forged Pistons options.
- Replies: 34
- Views: 4154
Re: LZ4 3500 rod info and forged Pistons options.
Jumping right in. Just gonna hook everything back up as before
- Mon Mar 20, 2023 6:35 pm
- Forum: Technical Conversations on Pontiac Fieros
- Topic: LZ4 3500 rod info and forged Pistons options.
- Replies: 34
- Views: 4154
Re: LZ4 3500 rod info and forged Pistons options.
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.
And hopefully make power all the way to 6500 vs falling around 5600 as before.
- Sat Mar 04, 2023 10:15 am
- Forum: Pontiac Fiero Discussion (General Non-Technical)
- Topic: Pauter rods for 3900 engine???
- Replies: 21
- Views: 3064
Re: Pauter rods for 3900 engine???
Yes steal. 4340 I think. They make Ti rods too but I'm not doing that
- Fri Mar 03, 2023 12:41 pm
- Forum: Technical Conversations on Pontiac Fieros
- Topic: NA 3900 Build
- Replies: 112
- Views: 30192
- Thu Mar 02, 2023 7:48 pm
- Forum: Pontiac Fiero Discussion (General Non-Technical)
- Topic: Pauter rods for 3900 engine???
- Replies: 21
- Views: 3064
Re: Pauter rods for 3900 engine???
$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
- Wed Mar 01, 2023 9:04 pm
- Forum: Technical Conversations on Pontiac Fieros
- Topic: LZ4 3500 V6 Swap
- Replies: 40
- Views: 5888
Re: LZ4 3500 V6 Swap
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.
Just something to keep an eye out for. 72 new is dirt cheap though. Wow.
- Tue Feb 28, 2023 6:40 pm
- Forum: Technical Conversations on Pontiac Fieros
- Topic: LZ4 3500 V6 Swap
- Replies: 40
- Views: 5888
Re: LZ4 3500 V6 Swap
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 ...
- Tue Feb 28, 2023 6:31 pm
- Forum: Technical Conversations on Pontiac Fieros
- Topic: LZ4 3500 V6 Swap
- Replies: 40
- Views: 5888
Re: LZ4 3500 V6 Swap
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...
- Mon Feb 27, 2023 9:30 pm
- Forum: Technical Conversations on Pontiac Fieros
- Topic: NA 3900 Build
- Replies: 112
- Views: 30192
Re: NA 3900 Build
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...
- Fri Feb 24, 2023 11:41 am
- Forum: Technical Conversations on Pontiac Fieros
- Topic: NA 3900 Build
- Replies: 112
- Views: 30192
- Fri Feb 24, 2023 11:28 am
- Forum: Technical Conversations on Pontiac Fieros
- Topic: NA 3900 Build
- Replies: 112
- Views: 30192
- Fri Feb 24, 2023 11:24 am
- Forum: Technical Conversations on Pontiac Fieros
- Topic: NA 3900 Build
- Replies: 112
- Views: 30192
Re: NA 3900 Build
You can turn your fuel rail around so the inlet is on the battery side. That's what I did
- Thu Feb 23, 2023 7:36 pm
- Forum: For Sale
- Topic: For Sale Lz4/9 Cam bearing spacers
- Replies: 3
- Views: 8334
Re: For Sale Lz4/9 Cam bearing spacers
More of these swaps are popping up and I still have a set of anyone is interested