Fiero
- Thread starter mlitemr2
- Start date
You have my support. now let cover the support thing. i was talking about moral support and not cash, you know that right 
benspeed
New member
Joe - I did get sucked in. Couldn't leave a sick car alone and won't sell it sick to some poor sucker.
Checked out Alans ITA Fiero site and he had some nice races - seemed like the car was handling well with very little of the dreaded understeer and was down only a bit on power. His car dyno sheets showed it at 125 ish for HP and my goal is 130 or better. My motor should be a very nice competition engine when it's finished. Not sure the exhaust will be at the top level it needs to be at but at least the headers are very nice.
Definitely a fun project so far and the parts a pretty cheap for these little scooters. When this thing is done I'll post up some dyno numbers.
What do the Integras put out for power? Mid pack and front runner estimates? Or better yet what do folks think this car needs to be at for it to run up front? Unlimited budget and all that....
Checked out Alans ITA Fiero site and he had some nice races - seemed like the car was handling well with very little of the dreaded understeer and was down only a bit on power. His car dyno sheets showed it at 125 ish for HP and my goal is 130 or better. My motor should be a very nice competition engine when it's finished. Not sure the exhaust will be at the top level it needs to be at but at least the headers are very nice.
Definitely a fun project so far and the parts a pretty cheap for these little scooters. When this thing is done I'll post up some dyno numbers.
What do the Integras put out for power? Mid pack and front runner estimates? Or better yet what do folks think this car needs to be at for it to run up front? Unlimited budget and all that....
Ben, That was an old data sheet on Alan's car. He did a fresh build last year (05) and added a custom exhust header. He managed to get it up to 140rwhp. It can be done with a 10/10ths build. Unfortunately employment issues kept him sidelined for the 06 season. Alan is a very good driver and has been playing with Fieros for several years. He even managed to set a couple track records with his Fiero back in the day.
Chuck
Chuck
lateapex911
Super Moderator
Fieros? late nights? naked? Did we really have to go there??
No Ben I am not running camber plates. The factory adjustment allows for plenty of adjustment travel. Some of the guys have slotted the upper mount holes while others have added plates. I won't even consider plates until I get the setup very close. Then if needed install camber plates to allow quick alignment changes between tracks.
Chuck
Chuck
benspeed
New member
Well, after about 5 weeks at the shop the Fiero is back home. Wallet is lighter and the car is faster - LOTS faster. I think the term we like is "snotty". This ended up being a full blown build.
Trip to the dyno soon.
I have nice headers on the car that are a little old and a 2 1/2" straight pipe - any trick exhaust ideas that other Fiero folks are doing? I'm looking at some of the West Coast Fiero systems but wonder if they are any better that my big pipe?
Trip to the dyno soon.
I have nice headers on the car that are a little old and a 2 1/2" straight pipe - any trick exhaust ideas that other Fiero folks are doing? I'm looking at some of the West Coast Fiero systems but wonder if they are any better that my big pipe?
Ben, Don't waste your money on the West Coast exhaust. Hogging out the stock manifolds will yield about the same as you would get with the West Coast stuff.
Per GM race engineers
"The preferred exhaust system for racing V6/60 Chevrolet is a three into one header system for each cylinder bank. Primary pipe diameter of 1 5/8 inch OD X 26' long feeding 2 1/2 - inch diameter collectors have proven successful. Collector length ahould be a least 33 inches. If the engine operating range is above 4000 rpm, a 2 1/4-inch diameter crossover pipe between the two collectors may be beneficial. This crossover should be located at the front of the collector." GM used to produce and sell these parts. Unfortunately they are no longer available. This was taken from the Chevrolet power service manual
An alternate final drive can be found in an Oldsmobile Acheiva. Gear ratio can be changed using an Olds Achieva R&P. Changes from 3.61 to 3.94. LSDs available from Gr8Grip and Phantom-Grip. Also a shop in Marietta Ga custom makes an LSD for the Fiero. Some of the Acheivas came with a Torson. I'm not shure which model that was.
I have put an Acheiva R&P in a Fiero Getrag, but havn't put it in the car yet. My reasoning for building the 3.94 is due to running out of rpm in fourth gear just after turn 9 flag station at RA. That is too late to allow shifting into 5th so I stay in fourth and hold rpm. I've tried shifting, but the short time between upshifting and down shifting is actually costing me time. The 394 should let me shift a couple of car lengths sooner, and build enough speed to make the shift worthwhile. The tranny swap has been placed on the back burner as suspension in a more urgent need.
Chuck
You could use the complete tranny from the Achieva but individual gears (1 - 4) would be off.
Chuck
Per GM race engineers
"The preferred exhaust system for racing V6/60 Chevrolet is a three into one header system for each cylinder bank. Primary pipe diameter of 1 5/8 inch OD X 26' long feeding 2 1/2 - inch diameter collectors have proven successful. Collector length ahould be a least 33 inches. If the engine operating range is above 4000 rpm, a 2 1/4-inch diameter crossover pipe between the two collectors may be beneficial. This crossover should be located at the front of the collector." GM used to produce and sell these parts. Unfortunately they are no longer available. This was taken from the Chevrolet power service manual
An alternate final drive can be found in an Oldsmobile Acheiva. Gear ratio can be changed using an Olds Achieva R&P. Changes from 3.61 to 3.94. LSDs available from Gr8Grip and Phantom-Grip. Also a shop in Marietta Ga custom makes an LSD for the Fiero. Some of the Acheivas came with a Torson. I'm not shure which model that was.
I have put an Acheiva R&P in a Fiero Getrag, but havn't put it in the car yet. My reasoning for building the 3.94 is due to running out of rpm in fourth gear just after turn 9 flag station at RA. That is too late to allow shifting into 5th so I stay in fourth and hold rpm. I've tried shifting, but the short time between upshifting and down shifting is actually costing me time. The 394 should let me shift a couple of car lengths sooner, and build enough speed to make the shift worthwhile. The tranny swap has been placed on the back burner as suspension in a more urgent need.
Chuck
You could use the complete tranny from the Achieva but individual gears (1 - 4) would be off.
Chuck
lateapex911
Super Moderator
And the Acheiva trans would be highly illegal, no?
iambhooper
New member
If the Achieva tranny is the early model Getrag (i can't remember the #), and the same one that was used in the Corsica and Berreta, then it is the same 5spd used with the V6 Fiero's. There were 2 difference's between the Corsica tranny and the Fiero's, the speedo pick up is magnetic in the Corsica and mechanical in the fiero (easily swapped over) and the attaching bracket's for the cables were slightly different.
I made this change on my daily driver many years ago, after detonating the Fiero tranny. It's possible that the fork might have been different, but I'm not certain. Otherwise, the tranny was the same model, casting, gearing (well, he did mention the final drive being different), ect.
hoop
I made this change on my daily driver many years ago, after detonating the Fiero tranny. It's possible that the fork might have been different, but I'm not certain. Otherwise, the tranny was the same model, casting, gearing (well, he did mention the final drive being different), ect.
hoop
Hoop
It's the same tranny, however the Acheiva uses different gearing therefore it would be illegal to use in the Fiero. The case, shafts, and bearings are the same. It would make a good core if something happened to your Fiero Getrag. The bell houising is different also. The Acheiva uses an internal slave cylinder. It will bolt up to the Fiero engine, but the hydraulics would be all wrong.
Ben,
Found the info on the LSD shop here in Georgia. Engineered Performance Ph 770-528-3882 www.engineered.net/eplsd.htm Available in either a street or race model.
Chuck
It's the same tranny, however the Acheiva uses different gearing therefore it would be illegal to use in the Fiero. The case, shafts, and bearings are the same. It would make a good core if something happened to your Fiero Getrag. The bell houising is different also. The Acheiva uses an internal slave cylinder. It will bolt up to the Fiero engine, but the hydraulics would be all wrong.
Ben,
Found the info on the LSD shop here in Georgia. Engineered Performance Ph 770-528-3882 www.engineered.net/eplsd.htm Available in either a street or race model.
Chuck
iambhooper
New member
Ok, then that's the 2nd generation of the Muncie Getrag. Correct, the internal slave cylinder model isn't the same.... I had forgot about that one. Some people have modified it to work with some ofthe 3800SC street conversions, and possibly a few V-8's.
hoop
hoop
benspeed
New member
Ben,
Found the info on the LSD shop here in Georgia. Engineered Performance Ph 770-528-3882 www.engineered.net/eplsd.htm Available in either a street or race model.
Chuck
[/quote]
Thanks - that is worth a call. What should a good LSD run?
I fooled around with the welder today and created a high perf street exhaust - at least I can drive it around without setting off car alarms now.
After driving the car a little I can tell its got some good power potential. It was 20 degrees outside today - nothing more fun than setting up a car in a warm shop.
Found the info on the LSD shop here in Georgia. Engineered Performance Ph 770-528-3882 www.engineered.net/eplsd.htm Available in either a street or race model.
Chuck
[/quote]
Thanks - that is worth a call. What should a good LSD run?
I fooled around with the welder today and created a high perf street exhaust - at least I can drive it around without setting off car alarms now.
After driving the car a little I can tell its got some good power potential. It was 20 degrees outside today - nothing more fun than setting up a car in a warm shop.
Hoop, The Fiero guys who use the Acheiva Getrag swap the Fiero bellhousing onto the Acheiva tranny. They do a simular thing when mounting a Getrag to the Quad Four.
Ben, I have no idea what a LSD woulfd cost for a Fiero. Until I changed to softer rear spriings I expierenced no rear weel slip. After installing 275lb rear springs I had inside wheel spin at Nashvile and Road Atlanta. Since I also had bottoming issues at RA I am going to work with springs and swaybars first. I have aquires a set of 300, 325, and 350 pound springs. I will work through these then fine tune with spring rubbers. When I find the softest spring without bottoming I will increase the rear swaybar to control body roll. If I still have wheel spin at that point I will install a LSD.
During your engine build be sure to port the intake and exhaust to the limit. What ever you DO NOT remove the vane in the intake ports as this will kill power. The Fiero came with a true "Cold Air" intake. which has very little restriction. The only area for some improvement it the rain catch box located in the left rear wheel well.
Remove the box and fab tubing to replace it. I used a couple pieces of articulating dryer duct from Home Depot. You wont see much gain, but every little bit helps.
Chuck
Ben, I have no idea what a LSD woulfd cost for a Fiero. Until I changed to softer rear spriings I expierenced no rear weel slip. After installing 275lb rear springs I had inside wheel spin at Nashvile and Road Atlanta. Since I also had bottoming issues at RA I am going to work with springs and swaybars first. I have aquires a set of 300, 325, and 350 pound springs. I will work through these then fine tune with spring rubbers. When I find the softest spring without bottoming I will increase the rear swaybar to control body roll. If I still have wheel spin at that point I will install a LSD.
During your engine build be sure to port the intake and exhaust to the limit. What ever you DO NOT remove the vane in the intake ports as this will kill power. The Fiero came with a true "Cold Air" intake. which has very little restriction. The only area for some improvement it the rain catch box located in the left rear wheel well.
Remove the box and fab tubing to replace it. I used a couple pieces of articulating dryer duct from Home Depot. You wont see much gain, but every little bit helps.
Chuck