| | | quote | Originally posted by GT:
Hey-a-Cap'n-
I was speaking to Bud at Bud's Outback a few months back and he was just finishing up a prototype bolt-on for the 4.5/4.9 engines. It's a new set of roller rockers (either 1.7 or 1.8, can't recall) and the steel arms that they bolt to. The arms are aluminum in the 4.x engines and prone to breakage but his are to be steel like the Allante's and will not break. He may have them in production by now. All you do is remove the valve covers, remove the rocker assembly, and bolt the new assemblies on. No adjustments, just bolt and go! Sounded like a great way to pump up the power without tearing the engine down. He's at www.gr8grip.com .
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My interest is primarily is track events (either high performance or racing). I've been fooling around with various Fiero models for a few years now. Got started building a 4.9 on an 88 Coupe (converted to GT) platform that was going to be used for NASA's TT events, but they changed the TT rules after the 2005 season much to the detriment of this conversion. So, I continued racing my Neon this year. Now I want to finish up the 4.9. Actually, my racing partner, Rich and I are ready to put 3 different cars together ('88, '87 and '84); at least two of them will have manual transmissions. None of these cars will be used on the street, and thus, emission compliance is not an issue. We extimate the weight of the completed cars to be around 2150 - 2300 lbs., depending on whether we are using a manual trans or automatic, and whether roll bar or full cage is used.
Our objective is to make a fast (and fun) track car for as little as reasonably possible by using the Fiero chassis with the 4.9 engine although the budget will allow for some performance mods. Towards this end, we are hoping to limit ourselves to bolt on performance parts. Here is what I am contemplating:
For the 88 (for track or TT events):
Engine: My personal track car will be a 4.9 converted to carburetor... the distributor has already been converted. Delta cam and extended pushrods. Eldo exhaust manifolds through single (3 inch?) performance/race exhaust. Add Bud's roller rockers if available. Delete A/C and PS.
Trans: Somewhat undecided here. Been considering a Muncie 4 speed ( 3,32.- 365 hybrid, or a standard 3.65); or a Getrag. (I would be happy with a top speed of around 140 since there are only a couple tracks that I go to were such speeds are likely.). Add a GR8GRIP. Aluminum flywheel (already have one).
Brakes: 12" WCF Corvette conversion (already have them).
Wheels: 17" (or possibly 16" if they will fit over 12" brakes) with tire size that is matched to available gearing.
Suspension : Koni shocks (have them); Springs have not yet been finalized, but looking at 400# front and 325# rear (on coilover) as a starting point. Stock 88 rear sway bar with front to be determined.
Interior: Roll bar (Kirk) installed. Interior stripped. Battery moved to front.
For the 87 (race):
Essentially the same except that this one will be equipped with a full racing cage;
final brake selection has not been made (either 12" Corvette or Beretta style); will likely use an 88 rear cradle, but if not, a bump steer kit with solid cradle mounts will be used. Sway bar combination from those commonly used on the early chassis.
For the 84 (for track or TT events):
Engine/trans: Essentially stock except for bolt on mods listed above. Add Rockcrawl's chip, Eldo exhaust, and if we can find one, the Allante intake. Stock auto trans. Otherwise, similar to 88 except that springs may need to be adjusted to account for the heavier weight for the trans.
Since this thread deals primarily with 4.9 performance issues, does anyone have an estimate of hp/torque for an otherwise stock 4.9 with the bolton parts I have listed above with carb? How about with FI and Allante intake?
Couple other questions... Assuming the set up listed for the 88, could I expect to raise the redline and if so, approximately where would it be?
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FierOmar
[This message has been edited by FierOmar (edited 10-01-2006).]
