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Hello
Some of you might know me, some don't.
I' m the guy in Germany who is trying to keep his Spica running.
I always had problems to cope with my friends driving around with the carburretor engines. So this winter I decided to do something about it.
I did put in a few questions on this board, got a lot of answers, read alot and finally contacted Wes Ingram what to do.
First of all I would like to say thank you to Wes for his support and his suggestions. All I did was just simply doing what he wrote me to do. I'm writing this with his permission as well.
Second a big thank you to Papayam who supplied a lot of literature especially about camshafts and to Roadtrip for all that he has written for us so far.
My engine is a stock 2 Liter engine from 1974 except for the following things:
Newly rebuild FI pump by Wes Ingram ( Stock)
Bigger Throttle bodies by Wes Ingram
New l-jet tronic Bosch fuel pump Bosch number: 0580464013 ( plus following the whole procedure John has written in his Fuel diagnostic guide )
Spark Plugs NGK BP7ES ( lots of high speed driving on the German Autobahn)
The target was to get somehow near to the performance Alfa Romeo said the car was supposed to have. As we all know there is no stock Alfa Romeo at least at that time with the horsepower standing in the manuals.
Second I didn`t want to spent much money. I actually spent money only for the valve shims and for the dyno to verify the result.
Kompression of the engine between 12,1 bar and 12,5 bar
gives you 169,4 PSI - 175 PSI ( 1 Bar = 14 PSI )
So that is what I did:
I did set ignition maximum timing to 38 degrees.
- I did it with 5000 RPM but there is no further advance at 4000RPM. Listen for pinging at low engine speed with WOT (wide open throttle).
I did verify WOT at the butterflys.
-Use a mirror and center the plates in the throttle bores with the throttle stop screw on the manifold. Have a helper hold the accelerator to the floor. Remove the stop under the pedal if necessary and take out the slack in the throttle cable at the firewall. Loosen the throttle stop at the firewall (unscrew it to allow more stroke). Leave about 2mm slack in the cable.
I did set the intake cam to 102 degree. Exhaust already had the 102 degrees.
- This one is fairly easy I did use the Shankle Camshaft Timing Template. - Originall intake timing is 114°. You find the templates here on the board - somewhere, or you find them on the homepage of centerline somewhere.
- as you see I left the original camshafts in the car. I was thinking about changing - to the desired 105.48.03.200.01 but Wes said with them I would only get - an additional 3 - 5 HP. So I left the original 105.20.03.200.00 in the engine.
I did advance the FI-pump by one tooth.
- This is described in Wes Ingram`s manual.
I did reset the fuel mixture to 1,75 % CO at 2800 RPM.
- Readings were:
- on 2800 Rpm
CO 1,75
CO2 13,8
HC 58
- on idle at 750 RPM
Co 1,90
CO2 12,3
HC 870
- HC on idle is a bit high, I will have to do some more work to get the - throttleplates really closed.
I did reduce valve clearance to .014 on intake and to .016 on exhaust ( or .35mm in and .40mm out) this is not as much as Wes Ingram suggested but I think thats enough for starters. Wes did suggest .12 intake and exhaust .14 .
I did about 7500 Km or 4660 miles with these settings . No problems, and an average of 27 miles per gallon.And the Alfa driven like an Alfa is supposed to be driven.
Last weekend I went to a dyno (?) to verify the results I already felt. The car is performing really good. One of my friends said to me:" Good that you finally installed carburretors in the car", which I didn`t. I could cope with the others easily.
I attached two graphs, but they are of corse in German so the basic achievements:
As for the Horsepower achieved:
It is : 88,7 Kilowatt or 121 HP or 119,4 BHP
The maximum torque is :
179 Nm at 4000 Reffs. Fascinating fact the torque stays always above 170 Nm on the range between 2500 reffs and 5000 reffs.
1 Newton Meter equalizes 0.737562 lbf ft ( poundforce feet )
That will make if my calculator is not lying: 179 Nm 132,02359 lbf ft
Motorleistung = enginepower
Diagram shows the actual horsepower( Red line ) in KW it gives me 88,7 KW on 5030 reffs. Blue line is the loss of power at the wheel which is I think a bit to high with 14,5 KW or 19,8 HP. ( Any ideas for that one?)
Drehmoment = torque
Shows the actual torque ( blue line ) Nm.
And the engine power ( red line )
I`m really satisfied with the achievements made.
Greetings from Germany
Bernhard
Some of you might know me, some don't.
I' m the guy in Germany who is trying to keep his Spica running.
I always had problems to cope with my friends driving around with the carburretor engines. So this winter I decided to do something about it.
I did put in a few questions on this board, got a lot of answers, read alot and finally contacted Wes Ingram what to do.
First of all I would like to say thank you to Wes for his support and his suggestions. All I did was just simply doing what he wrote me to do. I'm writing this with his permission as well.
Second a big thank you to Papayam who supplied a lot of literature especially about camshafts and to Roadtrip for all that he has written for us so far.
My engine is a stock 2 Liter engine from 1974 except for the following things:
Newly rebuild FI pump by Wes Ingram ( Stock)
Bigger Throttle bodies by Wes Ingram
New l-jet tronic Bosch fuel pump Bosch number: 0580464013 ( plus following the whole procedure John has written in his Fuel diagnostic guide )
Spark Plugs NGK BP7ES ( lots of high speed driving on the German Autobahn)
The target was to get somehow near to the performance Alfa Romeo said the car was supposed to have. As we all know there is no stock Alfa Romeo at least at that time with the horsepower standing in the manuals.
Second I didn`t want to spent much money. I actually spent money only for the valve shims and for the dyno to verify the result.
Kompression of the engine between 12,1 bar and 12,5 bar
gives you 169,4 PSI - 175 PSI ( 1 Bar = 14 PSI )
So that is what I did:
I did set ignition maximum timing to 38 degrees.
- I did it with 5000 RPM but there is no further advance at 4000RPM. Listen for pinging at low engine speed with WOT (wide open throttle).
I did verify WOT at the butterflys.
-Use a mirror and center the plates in the throttle bores with the throttle stop screw on the manifold. Have a helper hold the accelerator to the floor. Remove the stop under the pedal if necessary and take out the slack in the throttle cable at the firewall. Loosen the throttle stop at the firewall (unscrew it to allow more stroke). Leave about 2mm slack in the cable.
I did set the intake cam to 102 degree. Exhaust already had the 102 degrees.
- This one is fairly easy I did use the Shankle Camshaft Timing Template. - Originall intake timing is 114°. You find the templates here on the board - somewhere, or you find them on the homepage of centerline somewhere.
- as you see I left the original camshafts in the car. I was thinking about changing - to the desired 105.48.03.200.01 but Wes said with them I would only get - an additional 3 - 5 HP. So I left the original 105.20.03.200.00 in the engine.
I did advance the FI-pump by one tooth.
- This is described in Wes Ingram`s manual.
I did reset the fuel mixture to 1,75 % CO at 2800 RPM.
- Readings were:
- on 2800 Rpm
CO 1,75
CO2 13,8
HC 58
- on idle at 750 RPM
Co 1,90
CO2 12,3
HC 870
- HC on idle is a bit high, I will have to do some more work to get the - throttleplates really closed.
I did reduce valve clearance to .014 on intake and to .016 on exhaust ( or .35mm in and .40mm out) this is not as much as Wes Ingram suggested but I think thats enough for starters. Wes did suggest .12 intake and exhaust .14 .
I did about 7500 Km or 4660 miles with these settings . No problems, and an average of 27 miles per gallon.And the Alfa driven like an Alfa is supposed to be driven.
Last weekend I went to a dyno (?) to verify the results I already felt. The car is performing really good. One of my friends said to me:" Good that you finally installed carburretors in the car", which I didn`t. I could cope with the others easily.
I attached two graphs, but they are of corse in German so the basic achievements:
As for the Horsepower achieved:
It is : 88,7 Kilowatt or 121 HP or 119,4 BHP
The maximum torque is :
179 Nm at 4000 Reffs. Fascinating fact the torque stays always above 170 Nm on the range between 2500 reffs and 5000 reffs.
1 Newton Meter equalizes 0.737562 lbf ft ( poundforce feet )
That will make if my calculator is not lying: 179 Nm 132,02359 lbf ft
Motorleistung = enginepower
Diagram shows the actual horsepower( Red line ) in KW it gives me 88,7 KW on 5030 reffs. Blue line is the loss of power at the wheel which is I think a bit to high with 14,5 KW or 19,8 HP. ( Any ideas for that one?)
Drehmoment = torque
Shows the actual torque ( blue line ) Nm.
And the engine power ( red line )
I`m really satisfied with the achievements made.
Greetings from Germany
Bernhard
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