bmwguru is kicking ass and taking names on your build!
Dude, you and fieroguy123 have turned me into a turbo guy. I'm going to be buying the (stock)2.0Turbo that fieroguy123 is pulling out of fierogal123's Formula and that's probably going to be going into my '86 base coupe. I lost out on the 3.1turbo that was for sale... he just wanted way more money than I could justify.
ALLTRBO
JUL 31, 09:57 AM
quote
Originally posted by Rallaster: Dude, you and fieroguy123 have turned me into a turbo guy.
The farce is strong with this one. Prepare ship...for LUDICROUS SPEED!
[This message has been edited by ALLTRBO (edited 08-01-2010).]
fieroguy123
JUL 31, 10:03 AM
Hahahaha! Priceless!!!
Pete Matos
JUL 31, 10:11 AM
I gotta say that I am quickly seeing the beauty of turbocharging lately, even tho I have this 3800SCII here to play with soon I am seriously thinking about making this a turbo car instead. The power output and efficiency advantages are just too big to deny. Then after seeing the performance of Justins car as well as others on here with well built turbo systems I can't see any other way to go...... Never seen one like this tho with the 3.1 and am anxious to see what kind of performance you get out of it. Should be very impressive and Obviously you have top notch people working on it. One look at that Tig welded manifold and the tidiness of the assembly in that engine bay speaks volumes to the skills of the builders.... Congratulations on going with an interesting and unique setup there, well done....!!
Peace
Pete
hklvette
AUG 06, 02:52 PM
When you re-angled the intake inlet, was it simply for aesthetics, or to keep if from being too close to the strut tower? Were there any other changes required for it to be bolted on backwards?
Thanks!
ALLTRBO
AUG 08, 04:42 PM
Hklvette, the intake needed re-angled for strut-tower clearance. The throttlebody would have jammed straight into it otherwise. It bolts directly onto the lower intake both ways. The only other things that need to be changed are changes you have to make for a Fiero swap anyway, such as hose and throttle linkage connections, fuel rail mounting, and some minor accessory-drive modifications.
Pete, thanks. As some mentioned in that other thread, in general turbochargers are more efficient than superchargers, but not always. Yes, superchargers have a large parasitic loss via the crank driven belt, but turbochargers also have a loss in the form of added backpressure in the exhaust before the turbo. If you compare some older designs of turbochargers with some newer designs of some superchargers, you'll see that the difference in efficiency isn't as great as one might think. In general turbochargers make a broader powerband with higher torque than a comparable supercharger, as evidenced by several direct-comparisons that I've seen (I'd have to search to find the articles, it's been a long time). That's very 'rule-of-thumb', though. Many variables come into play.
That being said, yes, almost any of the turbo's people mount up on the L67's (3800SC) are more efficient than that stock supercharger, and even a lot of aftermarket twin-screw or roots superchargers. That's why you see massive power coming out of the turbo setups and not the supercharged setups. There are supercharger upgrades that'll knock your 3800 socks off too, but from what I understand they usually they won't fit in a Fiero without hacking up the decklid (especially with an intake-mounted intercooler that's required to make serious power), and they have instant torque that's great for shredding our weak transverse transmissions (yes, even the 4T65).
With a setup like mine, a turbo is a no-brainer because there aren't any bolt-on supercharger setups available. I'm seriously biased toward turbos anyway, so I'd never bother with a supercharger even if it was easier.
ALLTRBO
AUG 08, 09:45 PM
Probable taillight setup... The pic is real, but I photoshopped it to closer reflect what I want the taillights to look like (and it's a yellow car with dual stripes). I don't know who's car this is, unfortunately. I've had this idea in my head for several years.
[This message has been edited by ALLTRBO (edited 08-09-2010).]
bmwguru
AUG 13, 09:36 AM
Here is a few quick pics of the exhaust. It is all stainless steel and TIG welded together. It is fabricated from mandrel bends. We fabricated it into two pieces to make removal easier. The only part not shown is the wastegate dump. As per Steven's request, we built essentially two exhaust systems and incorporated them into one unit. There is an electronic flapper to regulate the flow through the muffler. This acts as a turbo dump, but Steven did not want any exhaust to not come out of the tail pipes, so we had to create a circuit for the muffler.
Wait.. I don't quite understand what I'm looking at. I know it's an exhaust, and I can see that the muffler is on it's own separate circuit and I see the electronic flapper, but I'm not quite understanding the why of it all..
God, being ignorant sucks..
ALLTRBO
AUG 13, 11:52 AM
Beautiful! I'm getting excited^2. It's all becoming very 'real' now.
Rallaster, when the electric cutout (it's actually just a 'valve' now) is closed, the exhaust is forced to flow through the 2.5" muffler. When it's open, it goes straight through the 3" pipe. I want the ability to quiet the exhaust down for neighborhood cruising, etc, but at the track/strip or whenever I feel like it, I want it to blow straight through for the least restriction possible (basically, you don't want any restriction after the turbo). The valve is infinitely adjustable so I can set it anywhere in between.
I wanted all of the exhaust to exit the tailpipes, none before, as a typically installed cutout does. The wastegate dump will also be routed back into the downpipe at a 45* angle.
Dave, out of curiosity, why did you paint it? It doesn't bother me and it looks good, but it doesn't need paint because it's SS.
[This message has been edited by ALLTRBO (edited 08-13-2010).]
bmwguru is kicking ass and taking names on your build! 
