Well... NOW it's PFI and we haven't had the same problem since. When we had the icing issue, it was carbeureted... which is why it had a phenolic carb spacer
Continuing on this tangent, the temperature drop is two parts... latent heat from fuel atomization/vaporization and temperature drop due to expansion across the throttle plate With a dry manifold, the latent heat of the fuel is not present; the potential for throttle icing is greatly reduced, but still present.
The 500 now has a fuel injection manifold from a 70's Caddy. Instead of the original peak/hold injectors and analog ECM, we have modified the HEI distributor to package an LT1 optical distributor pickup and are running '94/5 LT1 electronics, along with LT1 Edit for tuning. With the MAF in place, all that was necessary to get it to start up and run reasonably well was changing the cylinder size constant from 0.717 to 1.025 (Litres per cylinder!) and setting the injector size constant appropriately (using modern injectors, not the original peak/holds).
Perhaps, but again if you don't drive your fiero in freezing conditions, like a large portion of this board, there is no problem with bypassing it. Especially with a high flow manifold such as the one being developed.
Cadiburban? I would like to see more info on that!
IP: Logged
09:02 AM
Will Member
Posts: 14250 From: Where you least expect me Registered: Jun 2000
Built 700R4 transmission (barely adequate), with conversion to a 4L80E in the works with a dual stator torque convertor from truck with 350 and towing package. Dual stator torque convertor has MUCH higher torque multiplication for a given stall speed than a standard convertor. What else do you want to know?
------------------ Turn the key and feel the engine shake the whole car with its lope; Plant the gas pedal and feel in your chest neither a shriek nor a wail but a bellowing roar; Lift and be pushed into the harness by compression braking that only comes from the biggest cylinders while listening to music of pops and gurgles. Know that you are driving an American V8. There are finer engines made, but none of them are this cool.
Luck, Fate and Destiny are words used by those who lack the courage to define their own future
IP: Logged
10:24 AM
Francis T Member
Posts: 6620 From: spotsylvania va. usa Registered: Oct 2003
Everything is looking quite good and Troy should be posting info real soon.
I've been in suspense since last night waiting on the news and pics, is this gonna be a christmas gift type of deal for pennocks, or will he be posting info/pics before christmas?
Perhaps, but again if you don't drive your fiero in freezing conditions, like a large portion of this board, there is no problem with bypassing it. Especially with a high flow manifold such as the one being developed.
Freezing isn't necessarily the issue, due point is. Moisture that's condensing in the air is a fine line away from turning to ice, like when being drawn through a venturii by a vacuum. If it's foggy out it'll get pretty cold at the throttle plate. Here in the PNW I personally would leave it intact.
Hey, the days not over yet! Actually, Troy just got done with the picture taking and he's on his way home to put them up his website. He'll post a link here in a little while. Keep watching..............
IP: Logged
06:50 PM
Raydar Member
Posts: 40925 From: Carrollton GA. Out in the... country. Registered: Oct 1999
My son just called to let me know that his cable and thus, his DSL has been down! As soon as it's up, he'll do the link etc. We're not trying to tease, we want you people to see them even more than you. I suppose, worse case, maybe I could take some pics and then let someone post them as I never seem to have much luck putting pictures up on PFF. I'm going to hold off on that option as I know my son really wants post the pictures he took today. That near-chrome looks great!
IP: Logged
08:43 PM
MarkJPana Member
Posts: 1926 From: Marlboro, MA, USA Registered: Mar 2003
The server host can not accept pictures right now for some reason. I can updated my website whenever I want and now this happens. I just called him and it is 12:15 at night and he is working on it. If someone can host a pic or two and give me a link we can post a pic or two. Email me at Troymx576@aol.com and I will send you the pics for now. The server guy said he is working on it and is hoping to have it back up in a few hours. Troy You can IM me at Troymx576 if you are on and can host a pic or two for a day
[This message has been edited by Troymx576 (edited 12-27-2004).]
Here are the links to the page when the website is back up, but I would not try it right away. Sorry for the delay. If you see a pic of the back of a car then it is not updated. I just put that there as a placeholder until I have the manifold pics.
I will have more details up this week. I am going to do a full install page with details and installiation pictures and prodecures on Tuesday/Wednesday. I plan to go to flowbench test it this Wednesday or next Wendesday. I have Wendesdays off and if there is time available at the shop this week I will go over and take care of it. I will post the results once I get them.
Troy
[This message has been edited by Troymx576 (edited 12-27-2004).]
For those that don't know, that lower flange that fits the stock lower intake is a PITA to make. The lower manifold has rectangular ports, so you have to transition to round, and 4 of the 6 are VERY close together, so welding is very tight. The fuel rail has to bolt to this manifold, so alignment is critical for the injectors to fit the stock lower manifold.
Question for Troy and Francis, have you considered using one as a master to have a casting made? Just curious......Paul
I looked at making castings but the mold for a casting is in the 15k range each and we would have needed a few different ones to make it done.
The intake is taller than stock, but will fit in the Fiero engine bay and not hit the engine lid.
The lower flange is really hard to make and takes up a larger portion of the time to make. The base flange has multiple angles. That is what took a while to get done. The first ones I did not like the way they came out and redesigned them.
For injector placement, thorttle body placement and other items. If it fit on stock it will fit on this. I took a lot of time making a lot of jigs for each item so it will fit without problems in the stock location and bolt up.
looks nice - should give some strong low end with those long runners
honestly i think low end feel will be very slightly improved, (the fiero pulls good low end now) but the 3000-6000 RPM pull should be MUCH stronger, and people with 3.1L and 3.4L engines will see the most gain from this, im not sure if anyone remembers the dual throttle body setup that cooter made, but his showed like a 50HP increase at the wheels, so im sure that this intake even being a single throttle body will see 30-40HP increases, its a VERY well designed peice, and im sure that ill be getting more than one in the future.
matthew
IP: Logged
08:53 AM
PFF
System Bot
Will Member
Posts: 14250 From: Where you least expect me Registered: Jun 2000
What is the overall runner length of stock vs. your manifold. This bolts onto the factory lower intake, right?
------------------ Turn the key and feel the engine shake the whole car with its lope; Plant the gas pedal and feel in your chest neither a shriek nor a wail but a bellowing roar; Lift and be pushed into the harness by compression braking that only comes from the biggest cylinders while listening to music of pops and gurgles. Know that you are driving an American V8. There are finer engines made, but none of them are this cool.
Luck, Fate and Destiny are words used by those who lack the courage to define their own future
Seems like I joined this forum at the perfect time. Add another to your list of interested and likely to purchase. Nice work, that looks like a very high quality piece you have engineered.
IP: Logged
11:18 AM
will_p Member
Posts: 214 From: St. Joseph MO, U.S. Registered: Apr 2003
Been watching this thread for a while, defineatly want one if I can afford it, too bad I already had Darrell Morse Port out my intakes, that may have been $ wasted... oh well thats the story of my fiero
Will
IP: Logged
11:58 AM
Raydar Member
Posts: 40925 From: Carrollton GA. Out in the... country. Registered: Oct 1999
Yes. That is very nice! Regarding the fitment of a larger throttle body, does it require a different pipe from the TB flange to the plenum? Or is the pipe large enough to accommodate a larger flange?
IP: Logged
12:23 PM
Fastback 86 Member
Posts: 7849 From: Los Angeles, CA Registered: Sep 2003
For those concerned about larger Throttle Bodies, Oreif told me a while back that a Darrell Morse ported TB is actually just about the perfect size (as far as flow) for the 3.4 pushrod engines, meaning its more than enough for the 2.8 and 3.1 engines. I plan on using a Darrell Morse TB instead of trying to make a bigger non-fiero one work. A ported lower manifold will also help.
