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Author Topic: Rolling Road Tune  (Read 435 times)
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Beckerman67
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Posts: 53



« on: 25 September, 2021, 10:34:32 AM »

 1972 Fulvia Coupe 1.3s S2

 Before tune - engine standard except for 123 electronic ignition and ITG foam air filter:

 BHP 72.7
 Max power at 5280 rpm
 Torque 78.3 lbf.ft at 4335 rpm

 After tune - main jets changed from standard 120 to 130 and timing adjusted:

 BHP 86.1
 Max power at 6405 rpm
 Torque 78.8 lbf.ft at 4800 rpm

* Rolling.pdf (1946.06 KB - downloaded 36 times.)
« Last Edit: 25 September, 2021, 10:45:03 AM by Beckerman67 » Logged
davidwheeler
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Posts: 1268



« Reply #1 on: 26 September, 2021, 09:45:32 PM »

Worth spending the bob or two then!    I gather modern petrol is of a different viscosity.    I have enlarged the "slow running" jets and improved pick up and have often wondered about the mains...
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David Wheeler.  Lambdas, Aprilia, Fulvia Sport.(formerly Appia and Thema as well).
Beckerman67
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Posts: 53



« Reply #2 on: 27 September, 2021, 04:56:42 AM »

 I changed the main jets without removing the carburettors.
 A tricky little job which involved standing on my head with a mirror and a catch-tray for petrol and tiny screws!
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Mikenoangelo
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Posts: 355


« Reply #3 on: 27 September, 2021, 07:27:03 AM »

Much higher rpm "after". Could it not achieve 6400rpm before?
Mike
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dhla40
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Posts: 152


« Reply #4 on: 27 September, 2021, 08:26:48 AM »

Dd you retain the standard 180 air correctors?  I presume the power figures are at the wheels.

Sean
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1976 1.3s coupe
1973 1.3s coupe
1982 montecarlo project
1976 alfa GT
1981 alfa spider
Beckerman67
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Posts: 53



« Reply #5 on: 27 September, 2021, 08:48:58 AM »

 Air correctors standard 180.
 Brake Horse Power is stated at the flywheel as is normal practice I believe?
 Wheel Power is 57.2
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dhla40
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Posts: 152


« Reply #6 on: 27 September, 2021, 09:16:43 AM »

I was thinking Lancias book figure of 90hp may be optimistic, what timing max advance did you settle on?

Sean
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1976 1.3s coupe
1973 1.3s coupe
1982 montecarlo project
1976 alfa GT
1981 alfa spider
Beckerman67
Member
****
Posts: 53



« Reply #7 on: 27 September, 2021, 09:23:56 AM »

 Timing at 17/29 max
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dhla40
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Posts: 152


« Reply #8 on: 27 September, 2021, 09:29:18 AM »

Excellent, thats about what I am using, but with 125 main 165 air.

Sean
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1976 1.3s coupe
1973 1.3s coupe
1982 montecarlo project
1976 alfa GT
1981 alfa spider
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