Fiat 124 Spider Racecar

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Jim Scurria
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Joined: February 21st, 2007, 11:16 pm
Location: Norfolk, Virginia, USA
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Fiat 124 Spider Racecar

Post by Jim Scurria »

Greetings: I'll try to post a photo here, and if this works, I'll update with a few more photos!

This is an SCCA F-production Fiat 124 Spider with a 1756cc TC motor and 8v head: The entire project was developed using GC's Work Shop Manual, web-site, and GC 8 valve head prep DVD.

Head: prepared to GC specs
SS valves, standard size
Valve springs to GC specs
Pittatore cams
Carbs: dual 40 IDF, or single 40 DCNF
Block:
Bored .040 over
Arias forged pistons, about 11.5:1CR
Stock rods: lightened and rebalanced with ARP rod bolts (from 351 Cleveland)
Stock crank: lightened, knife-edged and rebalanced, with crank scraper
3 Quart Accusump and 16 row Mocal oil cooler
Ron Davis aluminum small-block Chevy radiator
QuarterMaster 2 disc Pro-Series clutch mated to flexplate and ringgear
Transmission: Fiat 5 speed mated to BMW 528 guibo
Differential: Fiat 4.1/4.3; welded
Total weight: 1715 lbs, less driver

thank you,
Jim
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SCCA FP-55
Testament
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Joined: June 22nd, 2006, 7:47 pm
Location: Taupo, New Zealand
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Re: Fiat 124 Spider Racecar

Post by Testament »

Nice car Jim,
The Ford 351 cleveland rod bolts on Fiat rods? was this a direct swap, or did you need to do some resizing to get them to fit?
also what suspension are you running in the car?
Jim Scurria
Posts: 3
Joined: February 21st, 2007, 11:16 pm
Location: Norfolk, Virginia, USA
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Re: Fiat 124 Spider Racecar

Post by Jim Scurria »

The 351 Cleveland rod bolts fit nicely by honing about .015" from the rods to give a slight interference fit. Rod bolts torqued to 50 ft.lbs. I run these to 9000 rpm.

Suspension is 650 springs front , 250 rear; Koni yellow shocks; 1" front sway bar. Delrin bushings on front control arms; Rear trailing arms replaced with steel tubing and heim joints. Panhard bar attachment point at the chassis is reinforced with a box-doubler, as this tends to be a weak point.
SCCA FP-55
engineerted
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Joined: September 26th, 2007, 7:05 pm
Location: Farmington, MI, USA (A)
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Re: Fiat 124 Spider Racecar

Post by engineerted »

Jim. nice posting, I will have to get my photos together and my car also. I love that photo of you making your own apex, just like the Stig on Top Gear! ( thats for you Guy)

Ted
74FP SCCA 124 spider
Jim Scurria
Posts: 3
Joined: February 21st, 2007, 11:16 pm
Location: Norfolk, Virginia, USA
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Re: Fiat 124 Spider Racecar

Post by Jim Scurria »

Thanks Ted, I'd love to see your stuff posted! There are so few of us left racing these cars, we've got to keep the noise level up!
Jim
SCCA FP-55
Chris Wright, Sydney
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Joined: December 30th, 2007, 12:30 am
Location: Sydney, Australia (A)
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Re: Fiat 124 Spider Racecar

Post by Chris Wright, Sydney »

Jim,
Lovely car, a real jewel and I can't get over how tiny compared with the "wide boy" Mazda behind you. Which raises a question - is the Mazda in a different class which allows body mods vs your bodywork which is standard?
Regards,
Chris Wright
Sydney Australia
miro-1980
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Location: Warsaw suburb , Poland
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Re: Fiat 124 Spider Racecar

Post by miro-1980 »

Jim,

A real nice car. Actually very impressive!

Quick questions :

How well does a 4.1/4.3 (welded) diff do on a track? What speeds and rpm do you achieve?

What are the gear ratios are you using ?

Power and torque data ?

Miro
www.Fiat-abarth-rally.com
GC_93
ace124
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Joined: September 4th, 2006, 2:09 am
Location: Pafos Cyprus
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Re: Fiat 124 Spider Racecar

Post by ace124 »

Gooday Jim,

Can you please outline your suspension specifications?
Any chance of a few pix?

thank you
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