Returning Fiero Owner - Let's Talk 2.8 Breathing (Page 4/14)
SpaceLion APR 04, 04:30 PM
Hey Dennis,

Yeah I definitely thought about forced induction solutions to get the air volume right. Unfortunately I don't have the skills or equipment to do that. I'm also assuming you had to have the fuel and ignition tuned to your new setup. So all things considered, a turbo would probably cost me quite a bit. Plus there is the issue of the bored out and modified engine that I'm working with. I'm not sure what the new compression is yet, or how much boost it could reliably handle. I was actually hoping to find a 5-7 psi superchanger that might work. Since at least for me, superchargers seem to be more straight forward in their installation and require less skill usually. Plus I'm a fan of SC powerband shape over turbo powerband shape. I like smooth predictable power. But hey! If I could find someone willing to install and tune for a small turbo setup under 1k, I would almost definitely do it. For now though, I'm just pushing forward with trying to get her asthma cured.
La fiera APR 04, 09:56 PM
https://www.ebay.com/itm/60...anifold/303529594971

I got an Ashma pump that will help you. Like Dennis said, the other way is a turbo which it produces a lot of heat in the engine bay.
Good luck with your goals!
La fiera APR 04, 11:03 PM
https://www.ebay.com/itm/60...anifold/303529594971

I got an Ashma pump that will help you. Like Dennis said, the other way is a turbo which it produces a lot of heat in the engine bay.
Good luck with your goals!
pmbrunelle APR 05, 01:17 AM

quote
Originally posted by La fiera:
Like Dennis said, the other way is a turbo which it produces a lot of heat in the engine bay.



Does it have to be an either/or proposition?

Have you ever done one of your fancy intakes with a turbocharger?
ericjon262 APR 05, 03:27 AM

quote
Originally posted by pmbrunelle:


Does it have to be an either/or proposition?

Have you ever done one of your fancy intakes with a turbocharger?



I follow Richard Holdner on youtube, he has shown on a large variety of builds that improving the NA engine is the best way to make more power under boost.

------------------
"I am not what you so glibly call to be a civilized man. I have broken with society for reasons which I alone am able to appreciate. I am therefore not subject to it's stupid laws, and I ask you to never allude to them in my presence again."

cognita semper

http://www.fiero.nl/forum/Forum2/HTML/119122.html

RayOtton APR 05, 08:13 AM
Took a bit of searching but I did find the guy who did my throttle body. Did a nice job, took about 10 days from start to finish.

https://www.throttlebodys.com/FieroTBs.htm
SpaceLion APR 05, 12:44 PM
Ray, you are the man! I will definitely be doing this.


quote
Originally posted by RayOtton:

Took a bit of searching but I did find the guy who did my throttle body. Did a nice job, took about 10 days from start to finish.

https://www.throttlebodys.com/FieroTBs.htm
Dennis LaGrua APR 05, 12:45 PM

quote
Originally posted by SpaceLion:

Hey Dennis,

Yeah I definitely thought about forced induction solutions to get the air volume right. Unfortunately I don't have the skills or equipment to do that. I'm also assuming you had to have the fuel and ignition tuned to your new setup. So all things considered, a turbo would probably cost me quite a bit. Plus there is the issue of the bored out and modified engine that I'm working with. I'm not sure what the new compression is yet, or how much boost it could reliably handle. I was actually hoping to find a 5-7 psi superchanger that might work. Since at least for me, superchargers seem to be more straight forward in their installation and require less skill usually. Plus I'm a fan of SC powerband shape over turbo powerband shape. I like smooth predictable power. But hey! If I could find someone willing to install and tune for a small turbo setup under 1k, I would almost definitely do it. For now though, I'm just pushing forward with trying to get her asthma cured.



If I can find them, I do have programs ( as do others) on Tunercat that have the timing tables and fueling for the 2.8L turbo. Yes you must introduce fuel and have timing retard with boost. This requires a 2 BAR MAP sensor The stock 2.8L should be able to take 5-6 psi of boost without issues but if you go hog wild on boost its BOOM!. IMO, turbos are easier to install than a supercharger. A while ago there was a guy in eBay that sold a Fiero turbo kit for $1,000. It used a Chinese turbo, had all the installation parts (exhaust plumbing) , except the program and the 2 BAR MAP. A friend of mine purchased one and it worked but he had to improve the oil feed line. As for engine compartment heat there is more but I got around this by wrapping the crossover pipe and mounting the turbo close to the air grill.
When I view all the work that guys are doing to improve the plenum; the first thing that comes to mind is the turbo as a solution.

------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

[This message has been edited by Dennis LaGrua (edited 04-05-2020).]

SpaceLion APR 05, 12:47 PM
I'm definitely interested, but I have to research a bit more on tuning so I don't get a bunch of crazy codes and running issues. I also am in the process of buy another intake from another member, though I'm considering also picking this one up since it seems to move the power band up. Kind of my goal.


quote
Originally posted by La fiera:

https://www.ebay.com/itm/60...anifold/303529594971

I got an Ashma pump that will help you. Like Dennis said, the other way is a turbo which it produces a lot of heat in the engine bay.
Good luck with your goals!



La fiera APR 05, 01:37 PM

quote
Originally posted by pmbrunelle:


Does it have to be an either/or proposition?

Have you ever done one of your fancy intakes with a turbocharger?



I actually did. It was back in 2002 when I had a 1989 Dodge Spirit Turbo. 2.5 SOHC 8 valve head.
Built the bottom end forged and fully balanced and started with 250WHP and 275WTQ
First I altered the stock intake and it made improvements, then I build one from scratch to suit my goals,
not power because the car was heavy but low to mid grewsome torque.
It took me a couple of years but when it was ready for ME with 30psi, water/meth, big plenum custom intake,
modified exhaust manifold to accomodate a custom ball bearing T61 hybrid turbo with .048 turbine
resulted in 420WHP@4000 and 560WTQ@3500 and it was over 400WTQ off throttle!
I coul've made more power but I decided to stick with the smaller turbine, it had no lag.




The gains of the custom intake didn't make much difference in this application so I decided to concentrate my efforts in
the design a turbo to match my needs, not what everybody else was running at the time.