drive by wire (Page 2/5)
sleek fiero DEC 14, 06:32 PM
that is at the wheels not the crank.. it was tested on a rolling road up to 250 km per hour.
82-T/A [At Work] DEC 15, 12:18 PM

quote
Originally posted by sleek fiero:

82 ta
I used a Bosch 54mm throttle body from a VW. Throttle from Nissan 370zx..Emtron sl6 ecu and aelc2 to control dual lambda o2 sensors. dual Bosch knock sensors. ford racing 52 lb injectors. ls coils andbuilt may own crank trigger wheel and used ls pickups.the 2.8 is bored and stroked to 3.208 cu centimeters.it has diamond forged coater 10.5-1 racing pistons and scat rods and is balanced. stainless valves and good springs and retainers. crower 3050 hydraulic cam and high volume lifters and comp cams roller tip rockers.theres more but you get the picture. by the way i am a licenced mechanic. can't figure out how to download picture.




Very intrigued... it looks totally awesome, you've done a fantastic job here. Would love to know how the driveability / performance feels to you, compared to how it was when stock!
82-T/A [At Work] DEC 15, 12:19 PM
Reposting OP's image so it's easier to see horizontally...
82-T/A [At Work] DEC 15, 12:24 PM
SLEEK FIERO... wanted to mention, you may not be aware of it... but the most significantly "bottleneck" in the Fiero's stock intake system, is actually the red Fiero plenum... directly behind where it connects to the throttle body. I THINK the throttle body size is 57mm... to be honest, it's been a decade since I even looked at it, so I can't remember... but if I recall, the neck actually squeezes the size down to just below 50mm. So if you want to see some significant gains from this set-up... you'll want to bore out the neck (requires opening up the floor of the neck and actually adding material because it'll get too thin) and then port-match the plenum to the intake runners, to the cyl head.


Go to this page and look at this:
https://www.pontiacperforma...ce.html#THROTTLEBODY


[This message has been edited by 82-T/A [At Work] (edited 12-15-2022).]

sleek fiero DEC 15, 01:59 PM
82 TA already done as i had to build an adaptor plate for the 4 bolt Bosch throttle body.it is all opened and polished to match the larger size. the intermediate manifold is port matched top and bottom and the lower manifold to heads is port matched. the exhaust ports to headers also.
82-T/A [At Work] DEC 16, 02:43 PM

quote
Originally posted by sleek fiero:

82 TA already done as i had to build an adaptor plate for the 4 bolt Bosch throttle body.it is all opened and polished to match the larger size. the intermediate manifold is port matched top and bottom and the lower manifold to heads is port matched. the exhaust ports to headers also.




Hi Sleek... not sure if we're talking about the same thing, but do you have any pictures of where you ported? I have a larger throttle body (57mm)... I actually had my (original) throttle body (52mm) bored out by someone named Darrel Morse back in the day. This is his picture from his old website (he doesn't do this anymore):




The point I was getting at though, was not JUST that you have to port the throttle body mount to match the new (much larger) throttle body... but you actually have to port further down into the neck as well. The stock size of the intake plenum, even if hogged out to the point where you broke through the bottom of the plenum, still wouldn't support the increased demands. I'm not sure how else to explain it... let me see if I can put something together really quick... or find an image from somewhere else...

HAHA... well, I just found a huge thread on this, which apparently I started 17 years ago on here... WOW, I'm old as **** apparently:

https://www.fiero.nl/forum/...110502-2-069539.html


This is what I'm trying to focus on... the lower portion of the neck is insufficient to support even my modified throttle body, so YOUR throttle body, which is even bigger, is likely suffering even more-so.

THIS is the area that needs to be improved:



In this case, he also chose to delete the EGR... and the welds are pretty messy, but if you haven't done this yourself... you'll want to do it because the neck basically pinches just before opening up to the larger part of the plenum. It's BARELY adequate to support a stock 52mm throttle body at WOT... but likely a significant bottle-neck for you with your much larger throttle body.

Years ago, a company named Truleo created an intake called the "Truleo" intake. For obvious reasons, I'm not a fan of it because while it does improve performance, it really detracts from the originality of the Fiero's intake... which is part of the car's charm.




If I remember correctly, the Truleo intake improved horsepower by about 9 horsepower on an otherwise totally stock Fiero... that means, with the stock 52mm.

Anyway, just wanted to mention it because I am very interested in your progress. If you did hog that area out, do you have any pictures? I haven't yet done it myself, but I'm very interested how you tackled this.
sleek fiero DEC 16, 03:26 PM
82 TA
82 TA Here is what I did. It is actually 56mm and matches the throttle body perfect
sleek fiero DEC 16, 03:29 PM
82 TA sorry i included the pictures of the cam sensor I built out of my old distributer. it uses a LS crank pickup
olejoedad DEC 16, 06:53 PM

quote
Originally posted by sleek fiero:

that is at the wheels not the crank.. it was tested on a rolling road up to 250 km per hour.



Very well thought out and executed.
Its good to see someone thinking outside the box.

What brand of dyno was used in testing power values?
sleek fiero DEC 17, 12:20 PM
the dyno was a Dyno Dynamics / Mainline Software unit., brand new 3rd or 4th car on it.. Fun stuff. Adrian Norton from Emtron is so Knowledgeable and did a great job of tuning from a zero start.