Returning Fiero Owner - Let's Talk 2.8 Breathing (Page 3/14)
La fiera MAR 31, 07:18 PM

quote
Originally posted by cvxjet:

I t seems that most of these mods aim at 7-9000 rpm out of the 2.8....I don't think that really makes sense. I have a 3.4 F-body long block under my stock induction system. I have read about someone testing an intake on a flow bench- with a enlarged throttle-body and then with the "neck" enlarged...The "Neck" enlargement was the big (Real) improvement.




A flowbench is a tool to be used as a means to have an idea of your goals, I personally don't care about flow numbers.
There are a lot of variables a flowbench doesnt test for.
For example, according to the flowbench my iron heads were only good for 242WHP max. The engine made 304WHP, 62WHP extra of what the
holy flowbench predicted. How can that be?!!
Well, the same way you can add a turbo to an engine that according to the flowbench would be impossible to reach 300WHP, now with
the altered atmospheric pressure the flowbench predictions become obsolete.
That same way you can design an N/A system where the TB, intake, cam and head act like a torque converter and multilply the rate
of incoming air velocity to increase VE and power. That's only one variable!
Takes a lot of thinking, Its tedius work but it can be done.
Turbo or supercharge is the easy way out if you don't want to put the effort.

CVXJET, I like your improvement on the stock upper plenum and can't wait to see the results, good luck my friend!
SpaceLion APR 01, 02:00 AM

quote
Originally posted by sourmash:

I've got the intake manifold available (if someone is interested) off of this setup found in the junkyard. Just the intake. I took details shots of the TB used but the price was too high on that.




So how much are you selling the intake section for? And what throttle body was on there so I could try to find it.

Also, I wonder if the lower intake plenum will choke out the gains of the ported upper... Right?

I sent and email to the Trueleo guys, and I actually got back an email like quick! It was his son Troy, who told me that he doesn't have the tools anymore to make them. And the most ineresting bit about the email was that he told me that they only made 15-20 total. So they are very rare. He also said that when he has seen them pop up on ebay, they are selling for way more than they sold them for. It's really too bad, it looked like exactly what I'm looking for.

That being said... I might be interested in that intake sourmash, I mean it is ported right?

And if anyone else is willing to sell their skills, or intake for matter. I'm open to paying someone with experience to port an intake for me, or a fabricated setup if you're up to making one for the right price. Keep in mind the list of mods in my initial post for this thread. That's why it needs more CFM, and there I explain my goals for the car.
SpaceLion APR 01, 02:03 AM
Also cvxjet, I think you're on the right track with modifying that bottle neck at the throttle body and that track on the way to the main body.

[This message has been edited by SpaceLion (edited 04-01-2020).]

sourmash APR 01, 08:06 AM
The cvxjet modification is called the Dawg mod. He might still do those. Around here machine shops that weld like that charge $90 per hour and none convinced me they could do it reliably. Sad. This one I have is an alternative form to get around the neck restriction. The builder used a DIS setup like the Camrobird 3.4 setup as you can see the coils on the right side of the full engine shot. $50 bucks plus shipping and it's yours. Here's the shots of the TB it had on it. Someone should be able to recognize it or it could be sized by the opening and bolt pattern. Using a stock Fiero TB when this was built would be a big miss, so I'm sure it's larger. It appears to be a Fiero intake, and it's a straight-shot design now. No throat to choke,

[This message has been edited by sourmash (edited 04-01-2020).]

cvxjet APR 01, 06:40 PM
Thanks for the....compliments....

I did all of the cutting and fitting- then had my buddy weld it up for me- He was a welder at NAS Alameda back in the 80s-90s- He had actually gone to Metallurgy classes- so he actually knows what is going on while he is welding.....I needed my boat trailer shortened to fit in my garage, so we spent a whole Saturday cutting the front, bending, and then rewelding it together- that was back in 2000 and it is still solid!

The crazy thing is he would not let me pay him; Later, I bought a second copy of a book I had been given for Christmas; "The Muscle Car Chronicle". It is a very cool book with 15-20 pages devoted to each year from 1960 to 1972, (Hardback).....I gave him the book and he looked it over then tried to give it back ("No- it's yours!!")...Then he starts to pull out his WALLET!....."Dude! You never let me pay for the trailer welding! Take it!"

I'm waiting to sand-blast it to get the old paint off so I can spray the new paint- and the Virus-Crisis has stopped all of that stuff.....
La fiera APR 02, 10:25 PM
Here it is! that same 2.8 testing at a road course. I had street tires on porpuse. My goal was just to drive the car and feel the overal set up.
The transmission was not meant for this track. Enjoy!
https://youtu.be/apPx7Tu3Q9E

[This message has been edited by La fiera (edited 04-02-2020).]

SpaceLion APR 03, 11:31 PM
PM sent. Just to reiterate, what was the issue with the TB not being included? You said it was too expensive to mention? So it's not for sale? Or you just feel like whatever number you put out there would melt my face off? Or did I misunderstand completely?


quote
Originally posted by sourmash:

The cvxjet modification is called the Dawg mod. He might still do those. Around here machine shops that weld like that charge $90 per hour and none convinced me they could do it reliably. Sad. This one I have is an alternative form to get around the neck restriction. The builder used a DIS setup like the Camrobird 3.4 setup as you can see the coils on the right side of the full engine shot. $50 bucks plus shipping and it's yours. Here's the shots of the TB it had on it. Someone should be able to recognize it or it could be sized by the opening and bolt pattern. Using a stock Fiero TB when this was built would be a big miss, so I'm sure it's larger. It appears to be a Fiero intake, and it's a straight-shot design now. No throat to choke,
SpaceLion APR 04, 12:14 AM
Also Sourmash, can you measure the opening of the intake? It looks like it matched the throttle body. That would help me narrow down what it was. I wonder is a stock fiero TB has enough meat on it to port it to match. Also, I think I get it now. I was too expensive at the junk yard so you left it..

[This message has been edited by SpaceLion (edited 04-04-2020).]

sourmash APR 04, 01:11 AM
Correct. It was 35 or 38 bucks. Their prices on some things aren't too good. Others are.
Dennis LaGrua APR 04, 01:32 PM
All of the above mods look good and will help the 2.8L breath but on my first Fiero I just bolted on a turbo that I purchased at the junkyard for $30. It came from a Ford 2.5L engine Rebuilt it for $30 in parts, bolted it on; breathing problem solved and a 0-60 time in about 6.5 seconds. Big improvement in performance but this mod does require some welding skills for the plumbing. Total cost with all the pipes was under $200 but that was a while ago.

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