Fiat 128 Story

Competition engines and ancillaries - general discussion
philippe74
Posts: 39
Joined: Tue Oct 27, 2009 9:10 am
Location: Annecy - France
Contact:

Fiat 128 Story

Post by philippe74 » Wed Mar 13, 2013 7:47 pm

I started racing in historical french championship in 1998.
I started on a Ford Cortina as co-pilot for rallye and as pilot in a rallye and hill climb.
Later, unable to use this Fortina in competition (this car was not mine... my friend sold it) I bought a Alfa Romeo 2000 GT Veloce group 1 with whichI did rallies and hill climbs in the French championship of historic racing cars
After 3 years of pleasure I replaced by an Alfa-Romeo 1600 GT Veloce group 2
Great satisfaction with that Alfa! Very funny to drive and very powerful in its class.

Unfortunately I stopped competing for a few years and when I could return to this passion, I wanted to drive an original car not be seen in races in France.
When I was young I had a lot of fun to drive a Fiat 128 and I remembered that this model, sedan or coupe, had a nice results in competition.
So why and how began the history of my Fiat 128.
I looked on the internet long enough to find a model in good condition, not too rusty !!
Finally, I found one in Germany (thanks to the Internet) In France, all cars I founded was unfortunately very bad
After this purchase, the work of dismantling and preparation could begin.
Some pictures of this sweet green during disassembly and body preparation
***
Attachments
Copie de fiat128_retour_allemagne (5).JPG
Copie de fiat128_retour_allemagne (5).JPG (209.53 KiB) Viewed 2681 times
fiat 128 (50).JPG
fiat 128 (50).JPG (85.44 KiB) Viewed 2681 times
demontage (30).JPG
demontage (30).JPG (82.3 KiB) Viewed 2681 times
demontage (5).JPG
demontage (5).JPG (87.88 KiB) Viewed 2681 times
demontage (70).JPG
demontage (70).JPG (82.11 KiB) Viewed 2681 times
demontage (1).JPG
demontage (1).JPG (74.81 KiB) Viewed 2681 times
demontage (27).JPG
demontage (27).JPG (97.52 KiB) Viewed 2681 times
arceau (3).JPG
arceau (3).JPG (138 KiB) Viewed 2681 times
arceau (10).JPG
arceau (10).JPG (100.03 KiB) Viewed 2681 times
arceau (15).JPG
arceau (15).JPG (68.22 KiB) Viewed 2681 times
arceau (4).JPG
arceau (4).JPG (71.93 KiB) Viewed 2681 times
demontage moteur (19).JPG
demontage moteur (19).JPG (285.81 KiB) Viewed 2681 times
demontage moteur (8).JPG
demontage moteur (8).JPG (286.25 KiB) Viewed 2681 times
demontage moteur (18).JPG
demontage moteur (18).JPG (266.2 KiB) Viewed 2681 times
travaux (11).jpg
travaux (11).jpg (87.47 KiB) Viewed 2681 times

philippe74
Posts: 39
Joined: Tue Oct 27, 2009 9:10 am
Location: Annecy - France
Contact:

Re: Fiat 128 Story

Post by philippe74 » Wed Mar 13, 2013 8:04 pm

fiat 128_19-06-2008 (4).JPG
fiat 128_19-06-2008 (4).JPG (64.84 KiB) Viewed 2680 times
fiat128-mai_2008 (7).JPG
fiat128-mai_2008 (7).JPG (58.71 KiB) Viewed 2680 times
fiat128-mai_2008 (16).JPG
fiat128-mai_2008 (16).JPG (61.14 KiB) Viewed 2680 times
fiat128-mai_2008.JPG
fiat128-mai_2008.JPG (82.35 KiB) Viewed 2680 times
fiat128-mai_2008 (10).JPG
fiat128-mai_2008 (10).JPG (75.94 KiB) Viewed 2680 times
fiat128-mai_2008 (21).JPG
fiat128-mai_2008 (21).JPG (55.22 KiB) Viewed 2680 times
peinture-1 (8).JPG
peinture-1 (8).JPG (63.93 KiB) Viewed 2680 times
peinture-1 (7).JPG
peinture-1 (7).JPG (54.6 KiB) Viewed 2680 times
peinture-2 (23).JPG
peinture-2 (23).JPG (77.89 KiB) Viewed 2680 times
peinture-2 (21).JPG
peinture-2 (21).JPG (67.65 KiB) Viewed 2680 times
peinture (19).JPG
peinture (19).JPG (70.63 KiB) Viewed 2680 times
peinture (6).JPG
peinture (6).JPG (70.04 KiB) Viewed 2680 times
fiat128-mai_2008 (13).JPG
fiat128-mai_2008 (13).JPG (58.16 KiB) Viewed 2680 times
Attachments
fiat128-mai_2008 (11).JPG
fiat128-mai_2008 (11).JPG (60.46 KiB) Viewed 2680 times

philippe74
Posts: 39
Joined: Tue Oct 27, 2009 9:10 am
Location: Annecy - France
Contact:

Re: Fiat 128 Story

Post by philippe74 » Wed Mar 13, 2013 8:12 pm

If you are interested with the following story ( Engine, gear-box and suspensions preparations ) I can continue tu upload few pics ?
For the engine, you easily imagine I follow a lot informations I got on Guy Croft Forum !!!!

Philippe

Guy Croft
Site Admin
Posts: 5003
Joined: Sun Jun 18, 2006 9:31 am
Location: Lincoln, UK
Contact:

Re: Fiat 128 Story

Post by Guy Croft » Thu Mar 14, 2013 10:46 am

MODEL POST!

Good work Phillippe!

I really enjoy these step-by-step posts on car/engine and this one has plenty of interest and color!

I look forward to seeing more!

G
Guy Croft, owner

philippe74
Posts: 39
Joined: Tue Oct 27, 2009 9:10 am
Location: Annecy - France
Contact:

Re: Fiat 128 Story

Post by philippe74 » Fri Mar 15, 2013 11:57 pm

Thank you Guy !!

Now, few comments about suspensions
I will not go in the details ..it will be too long and not necessary because everybody knows what to do on that type of car :)

Rear Suspension
Shock Fiat Ritmo Abarth 125 modified to fit the top of the chassis. Polyurethane upper stops
Adding a leaf spring (3 total)
Adding spacers to lower the car
Nota: I began with 3 cm spacers then after few races I noticed it was better with 5 cm
amortisseurs (9).jpg
amortisseurs (9).jpg (88.26 KiB) Viewed 2594 times
triangles (5).jpg
triangles (5).jpg (59.47 KiB) Viewed 2594 times
Spacers
entretoise AR.jpg
entretoise AR.jpg (91.25 KiB) Viewed 2594 times
Last edited by philippe74 on Sat Mar 16, 2013 12:04 am, edited 1 time in total.

philippe74
Posts: 39
Joined: Tue Oct 27, 2009 9:10 am
Location: Annecy - France
Contact:

Re: Fiat 128 Story

Post by philippe74 » Sat Mar 16, 2013 12:00 am

Front Suspension
Rear Shock Fiat X 1/9 1500. Modified ends support to fit on the car
Suspension springs custom made by a company in Marseilles. Wire diameter increased, turns pitch reduced, increased stiffness
Triangles with polyurethane bushings
amortisseurs (12).jpg
amortisseurs (12).jpg (66.73 KiB) Viewed 2594 times
amortisseurs (3).jpg
amortisseurs (3).jpg (99.07 KiB) Viewed 2594 times
amortisseurs (11).jpg
amortisseurs (11).jpg (65.58 KiB) Viewed 2594 times
Attachments
entretoise AV.jpg
entretoise AV.jpg (69.47 KiB) Viewed 2594 times
Last edited by philippe74 on Sat Mar 16, 2013 7:53 am, edited 3 times in total.

philippe74
Posts: 39
Joined: Tue Oct 27, 2009 9:10 am
Location: Annecy - France
Contact:

Re: Fiat 128 Story

Post by philippe74 » Sat Mar 16, 2013 12:02 am

Brake
Identical to the original ….but new for sure !
Front discs and pads from EBC (Yellow compound DP4116)
Goodridge lines
Pressure limiter Summit Racing
Motul racing brake fluid
repartiteur fiat-1.jpg
repartiteur fiat-1.jpg (70.32 KiB) Viewed 2594 times

philippe74
Posts: 39
Joined: Tue Oct 27, 2009 9:10 am
Location: Annecy - France
Contact:

Re: Fiat 128 Story

Post by philippe74 » Sat Mar 16, 2013 12:10 am

Gear box
4 original but short end ratio 11/53 (the smallest FIA approved)
Note: The first gear is too short, but it's good enough for the other 3
I had not enough money to buy a good set of pinions ...unfortunately
I had to modify the housing at the end of the box to allow room for a screw at extremity of shaft.
So I had to adapt a dedicated housing
Gear bracket is reinforced
BV (15).JPG
BV (15).JPG (67.74 KiB) Viewed 2594 times
BV (12).JPG
BV (12).JPG (104.63 KiB) Viewed 2594 times
BV (4).JPG
BV (4).JPG (69.87 KiB) Viewed 2594 times
BV (10).jpg
BV (10).jpg (37.91 KiB) Viewed 2594 times
BV (1).jpg
BV (1).jpg (38.45 KiB) Viewed 2594 times
tableau-rapport_vitesses.jpg
tableau-rapport_vitesses.jpg (111.07 KiB) Viewed 2594 times

philippe74
Posts: 39
Joined: Tue Oct 27, 2009 9:10 am
Location: Annecy - France
Contact:

Re: Fiat 128 Story

Post by philippe74 » Sat Mar 16, 2013 12:15 am

Cylinder head
Inlet valve 40 mm
Exhaust valve 35 mm
- special, fully-shaped racing-spec 21-4N steel valves made in UK,
- 7 mm valve stem (chrome-plated)
3 angle seat cut
- reinforced valve springs
- lightened steel retainers
- chamber volume 26 cm³
culasse (2).jpg
culasse (2).jpg (68.86 KiB) Viewed 2594 times
culasse (3).jpg
culasse (3).jpg (39.43 KiB) Viewed 2594 times
restrictor for oil in the camshaft box
culasse (4).jpg
culasse (4).jpg (26.63 KiB) Viewed 2594 times
Last edited by philippe74 on Sat Mar 16, 2013 7:54 am, edited 1 time in total.

philippe74
Posts: 39
Joined: Tue Oct 27, 2009 9:10 am
Location: Annecy - France
Contact:

Re: Fiat 128 Story

Post by philippe74 » Sat Mar 16, 2013 12:22 am

Standard flywheel modified to obtain 5 KG weight
Crankshaft pulleys and oil pump pulley lightened
Balanced crankshaft
Oil pan from Fiat X 1/9 aluminum ( modified to adapt a “door” retaining oil and a temperature sensor
Modified oil pump to increase pressure and flow
volantmoteur (2).jpg
volantmoteur (2).jpg (86.88 KiB) Viewed 2594 times
volantmoteur (8).jpg
volantmoteur (8).jpg (63.05 KiB) Viewed 2594 times
volantmoteur (7).jpg
volantmoteur (7).jpg (67.52 KiB) Viewed 2594 times
volantmoteur (3).jpg
volantmoteur (3).jpg (56.64 KiB) Viewed 2594 times
poulie-vilebrequin.jpg
poulie-vilebrequin.jpg (123.09 KiB) Viewed 2594 times
pompe-huile.jpg
pompe-huile.jpg (58.22 KiB) Viewed 2594 times
vilebrequin (1).jpg
vilebrequin (1).jpg (60.57 KiB) Viewed 2594 times
carter-fiat (6).jpg
carter-fiat (6).jpg (84.45 KiB) Viewed 2594 times
carter-fiat (8).jpg
carter-fiat (8).jpg (80.13 KiB) Viewed 2594 times
carter-fiat (5).jpg
carter-fiat (5).jpg (87.7 KiB) Viewed 2594 times
carter-fiat (2).jpg
carter-fiat (2).jpg (97.5 KiB) Viewed 2594 times

philippe74
Posts: 39
Joined: Tue Oct 27, 2009 9:10 am
Location: Annecy - France
Contact:

Re: Fiat 128 Story

Post by philippe74 » Sat Mar 16, 2013 12:29 am

Special forged pistons made by Sergio ALLAIS (I made only the drawing)
I choose dimension in order to reach a volumetric ratio approx. 10,6
culasse-rapport RV.jpg
culasse-rapport RV.jpg (32.88 KiB) Viewed 2641 times
dessin-piston.jpg
dessin-piston.jpg (144.94 KiB) Viewed 2641 times
pesage-bielle-piston (4).jpg
pesage-bielle-piston (4).jpg (67.58 KiB) Viewed 2641 times
pistons-dessus.jpg
pistons-dessus.jpg (23.86 KiB) Viewed 2641 times

philippe74
Posts: 39
Joined: Tue Oct 27, 2009 9:10 am
Location: Annecy - France
Contact:

Re: Fiat 128 Story

Post by philippe74 » Sat Mar 16, 2013 12:36 am

Block

Nothing special ...86,2 mm bored
plan joint machined to obtain precise offset of top pistons

Before: :)
bloc-moteur (12).jpg
bloc-moteur (12).jpg (83.87 KiB) Viewed 2640 times
bloc-moteur (10).jpg
bloc-moteur (10).jpg (74.46 KiB) Viewed 2640 times
bloc-moteur (48).jpg
bloc-moteur (48).jpg (79.52 KiB) Viewed 2640 times
blocmoteur (1).jpg
blocmoteur (1).jpg (118.33 KiB) Viewed 2640 times
bloc-moteur (23).jpg
bloc-moteur (23).jpg (71.63 KiB) Viewed 2640 times
bloc-moteur (27).jpg
bloc-moteur (27).jpg (68.61 KiB) Viewed 2640 times
bloc-moteur (36).jpg
bloc-moteur (36).jpg (100.95 KiB) Viewed 2640 times
bloc-moteur (35).jpg
bloc-moteur (35).jpg (53.98 KiB) Viewed 2640 times

philippe74
Posts: 39
Joined: Tue Oct 27, 2009 9:10 am
Location: Annecy - France
Contact:

Re: Fiat 128 Story

Post by philippe74 » Sat Mar 16, 2013 7:58 am

Exhaust
Collector 4x2x1
Custom exhaust pipes custom in stainless steel
Summit Racing Glasspack mufler
fiat 128 17-03-2010 026.jpg
fiat 128 17-03-2010 026.jpg (89.03 KiB) Viewed 2635 times
fiat 128 17-03-2010 027.jpg
fiat 128 17-03-2010 027.jpg (78.4 KiB) Viewed 2635 times
Tail pipe ..But after 2 races I add a silencer
fiat 128 17-03-2010 031.jpg
fiat 128 17-03-2010 031.jpg (81.05 KiB) Viewed 2635 times

philippe74
Posts: 39
Joined: Tue Oct 27, 2009 9:10 am
Location: Annecy - France
Contact:

Re: Fiat 128 Story

Post by philippe74 » Sat Mar 16, 2013 8:54 am

Miscellaneous:

Inlet manifold (similar to Alquati) + Weber 40 DCOE (2x)
CATcams camshaft 1900203 (299 / 299°) but I think it’s not aggressive enough ..
Vernier Pulley CATCams
Nippon Denso alternator (light)
bloc-moteur (32).jpg
bloc-moteur (32).jpg (90.65 KiB) Viewed 2635 times
DSCN0165Large.jpg
DSCN0165Large.jpg (69.17 KiB) Viewed 2635 times
nippon-denso.jpg
nippon-denso.jpg (32.81 KiB) Viewed 2635 times
Aluminium spacer: this thin part is between cylinder head and camshaft box in order to move it up.
Due to the new length of the valves, I did'nt found correct thickness shims to adjust the valve; so I add this 1,5mm spacer
This part has been machined by water cutting. I copy the profile of camshaft housing on a paer, then I took dimensions on it to make my CAD drawing
entretoise-culasse (2).jpg
entretoise-culasse (2).jpg (93.34 KiB) Viewed 2635 times
Throttle system made with a cable:
carburation (14).jpg
carburation (14).jpg (102.62 KiB) Viewed 2635 times
carburation (2).jpg
carburation (2).jpg (70.65 KiB) Viewed 2635 times
carburation (3).jpg
carburation (3).jpg (59.46 KiB) Viewed 2635 times

*******
NOta: When engine has been finished, I put standard ram pipes but results after few races was not so good
So, I changed them for full radius models ..it was better. I keep them during one season of races (2011)
In 2012, I got interesting informations and I decided to make my ow, rampipe.
First, I machined auxiliary venturi
carb-01.jpg
carb-01.jpg (33.56 KiB) Viewed 2635 times
carb-02.jpg
carb-02.jpg (3.79 KiB) Viewed 2635 times
I got a special rampipe for Citroen compétition and I copy internal shape
Also, I found my books in college when I was young .....:) ....and I applied some formulas
This allowed me to determine a profile that seemed interesting
I made the model according to that results
The inner profile of rampipe is exactly aligned with the shape of the auxiliary venturi.
I have no idea if this profile is" perfect" but I wanted to have fun and customize a little my work.
Primary outcomes were very good! I increased my max speed of 300 rpm and revving is more effective
cornet-5_25-02-2012.jpg
cornet-5_25-02-2012.jpg (49.91 KiB) Viewed 2635 times
cornet-iso-1.jpg
cornet-iso-1.jpg (29.83 KiB) Viewed 2635 times
cornets-alpax (2).jpg
cornets-alpax (2).jpg (54.85 KiB) Viewed 2635 times
cornet-fiat-custom (1).jpg
cornet-fiat-custom (1).jpg (11.92 KiB) Viewed 2635 times
cornets-fiat128 (3).jpg
cornets-fiat128 (3).jpg (79.64 KiB) Viewed 2635 times
cornets-fiat128 (1).jpg
cornets-fiat128 (1).jpg (91.96 KiB) Viewed 2635 times
This is a view with rampipes I used during one year:
carburation (17).jpg
carburation (17).jpg (64.06 KiB) Viewed 2635 times
Attachments
carburation (14).jpg
carburation (14).jpg (102.62 KiB) Viewed 2635 times

philippe74
Posts: 39
Joined: Tue Oct 27, 2009 9:10 am
Location: Annecy - France
Contact:

Re: Fiat 128 Story

Post by philippe74 » Sat Mar 16, 2013 9:27 am


I use this 128 for 2 years now in the French Historical hill climb championship
I really enjoyed and got good results and correct standings results; I finished 5th in 2011 and 7th in 2012. There are many "big" car listed in this category, but a 128 is so easy to drive and can go quickly, especially if the track is complicated.
Thank you very much Guy Croft because I found many answers to my questions by reading this forum regularly
Below are some photos of the finished car in competition


First race in 2011:
I still have Yokohama tires
0145.jpg
0145.jpg (16.13 KiB) Viewed 2632 times
Few months after, with large Toyo tires and intermediate rampipes (not final one)
DSC01293.jpg
DSC01293.jpg (69.09 KiB) Viewed 2632 times
P09071118.47.1.jpg
P09071118.47.1.jpg (80.49 KiB) Viewed 2632 times
On that picture, you can see the car still stable on the front.With these suspension springs, this 128 is working very well!
128-sabran-2012.jpg
128-sabran-2012.jpg (35.03 KiB) Viewed 2632 times
Last year, in Turckkeim, I used Michelin slicks and I have the custom rampipes since the third race of the year
Incredible results ...Engine was running very well
I noticed that it's not necessary to run over 8400-8500 RPM ...I have no more power
marie-lise-turckheim2012 (7).jpg
marie-lise-turckheim2012 (7).jpg (123.52 KiB) Viewed 2632 times

Post Reply

Who is online

Users browsing this forum: No registered users and 1 guest