Also Adding 65mm Throttle body and 3500 upper intake. This summer most of the mods planned are on the mechanical side. Brakes, Motor mounts, headers, wideband O2 setup, fuel pump, braided fuel lines, etc...
Yes there is, after a bit of a break from the car because of work. I finally got around to finishing the install of the OBDII harness and new computer with Sinister's tune. There were some issues that resulted in me getting a lot of knock retard at wot. Ryan and I diagnosed that it was "false knock" coming from a bad leak from the new headers. I tried to correct the problem but ended up with a sheared off stud instead. Pulled the head, had it drilled out. Then back in the car only to notice the other head gasket weaping coolant. Off with the other head, and now the engine has two new head gaskets, and is back together. The car is now running beutifully, although engine bay temps are up due to the new headers not having exhaust wrap yet. Just got back from a weekend road trip and had a blast with the car. The New 65mm throttle body, 3500 upper intake and full headers deffinately make a noticeable difference. I will get pics of the new setup this weekend. And hopefully get the car on the dyno the following weekend to see the results of the last round of mods. I will have to get those 12" rotors on quick, the throttle is getting a bit addictive on this car!
New look of the engine bay. New OBDII harness and ecu LX5 65mm Throttlebody w/ WOT-Tech Adapter 3500 upper intake Modified FOCOA headers Re-routed exhaust Re-plumbed coolant expansion tank to passenfger side New plug wires
The new headers are in desperate need of some heat wrap I also managed to take a good chunk out of the new splitter on the road trip last weekend.
Had some time to work on the car. Added braided fuel lines and a braided vaccuum line for the brake booster. Then pulled the headers and crossover pipe and added some exhaust wrap. Also, re-routed some of the wiring for a cleaner look. Next up is my brake upgrade. Just waiting for my modified hubs from Fieroguru. Then after that I have a very big upgrade to the engine planned, but I won't let the cat out of the bag on that yet...
In preperation for some engine upgrades, I finally got around to installing my new brake setup.
I went with the 12" Corvette C4 rotors all around. I purchased the Baer Eradispeed 2-piece units. I decided, since I already had '88 calipers/rotors in the back from my '88 rear suspension swap, to keep things simple and go with '88 calipers on the front. I purchased the C4 brackets and rings for an '88 for the rear, and BMWGURU's brackets and rings to mount '88 calipers on the '86 front. I also installed FIEROGURU's machined front hubs and new wheel bearings. Then I plumbed them all with braided lines from the FieroStore This way I end up with all four rotors and calipers the same.
Here is the stock units behind the wheels.
Heres a side by side comparison
Used one of the junk front rotors as a guide to re-drill the 5x100 bolt pattern. I was pretty nervous about ruining the new (expensive) 2-piece rotors. But it was actually pretty easy.
They turned out looking like this.
All mounted up
I didn't get that much driving in, but my initial impression is good. I will need to get some more high-speed brakeing in to really see how much improvment they have made.
[This message has been edited by Bridgetown (edited 07-16-2013).]
GTS is just a name I made up for the project. GT in most automotive circles comes from the italian term Gran Turisimo, which translates to grand touring, which were powerful comfortable luxury sports cars. The S comes from the Italian word superleggera, which translates to super-light. GTS cars were often lightened higher performance variants of a GT car. So this build is my translation of what a Gran Turisimo Suoerleggera Fiero would be. Fiero is Italian for proud too btw. So this is my Proud grand touring super-light car, haha. Also, I don't believe there is such a thing as a Fiero GTR either.
Pontiac never made a GTS or GTR version but I'd have to give this Fiero from Carlisle the title of GTR
3800 turbo charged, heavily modified water & air intercooled. owner estimated 550-650HP Just got the car running and hasn't dyno'd it yet.
How's your 3x00 hybrid swap going Adam? (Why does it feel like I'm talking to myself? ) Just went through the entire thread to refresh my memory. One of these days I'll switch over to OBD2 as well. For now I'm running the 65mm T/B & Wot-Tech adapter on the stock 3400 plenum, opened up the intake and exhaust ports, added a JBP regrind camshaft. Before mods I was 175hp at the wheels and my best time was 14.217 @156KPH so we both should easily be in the 13's with our current set-ups. Haven't been back to the track in a couple of years now. The 3400 looks just right in the Fiero, I've had so many people think the motor was stock in my car. Got a line on another 3400 & 3500 low mileage engines for my next project. Thinking turbo also, getting used to the power of my current swap, need more for the next one. ------------------
I'm building a new engine for my car on the side right now. I've been collecting parts for a while. Here's the spec list so far: 3400 LNJ block 3500 heads/ upper intake 65mm tb Headers 2.5" race exhaust (no muffler) 10:1 forged pistons Custom WOT tech cam Rotrex c30-94 supercharger Trailblazer injectors
Still need to figure out what I want to do for cooling the charged air.
Damn, how much boost you planning on using with 10:1 compression? My understanding is the more boost your want, the lower your compression should be.
Curious about the trail blazer injectors, what size are they & guessing they are multi-tech II also? Friend built a 3.4L block from a Camaro, found a guy in the states who can rebuild injectors to the size you need for less then the cost of new injectors. He up sized his from 15-17lbs. Think it's the same guy FieroSound used with his engine build. Just have to find a weekend now to install his motor.
I was thinking of going with a Vortec S/C to for the main reason that if something happened to it, I can re-route the belt to bypass the S/C and run N/A till I fix it. Carry a spare belt for just in case emergency, but more I think and listen to friends advice, may just go turbo and automatic for my next build. Wife could drive the car then, just need to put an actuator on the blow off valve so it stays open when she drives the car. (for safety reasons )
The pistons are 10:1 with stock 3400 heads, but since I'm running 3500 heads with larger combustion chamber volume, the compression will be close to stock, which is 9.6:1 I will only be running around 8-10 psi of boost, so the compression shouldn't be a problem. The trailblazer injectors are a direct swap on a 3400 fuel rail and are 28# @ 55psi