Rebuilt

Make it go fast! Kick it up a notch. Post tips in here.
Post Reply
fiat218
Posts: 5745
Joined: Fri May 16, 2008 5:06 pm
Your car is a: 1969 124 AS spider

Rebuilt

Post by fiat218 »

I have one question, maybe 2
I have to open the engine up to determine what pistons I will be using, correct
Cam will be determine from the piston size, correct
Jim
East Grand Forks MN
1970 Fiat Spider BS1 ( FOR SALE
1969 124 AS Spider
2017 Abrath
2018 Alfa Romeo 4c Spider
spiderrey
Posts: 2623
Joined: Sat Jan 28, 2006 2:08 pm
Your car is a: 70 124 spider-74x19-03 ranger edge
Location: San Dimas, Ca

Re: Rebuilt

Post by spiderrey »

Cam is preference, has nothing to do with piston size. Could have something to do with piston type though.
fiat218
Posts: 5745
Joined: Fri May 16, 2008 5:06 pm
Your car is a: 1969 124 AS spider

Re: Rebuilt

Post by fiat218 »

spiderrey wrote:Cam is preference, has nothing to do with piston size. Could have something to do with piston type though.
not positive i know what u mean, but thanks
Jim
East Grand Forks MN
1970 Fiat Spider BS1 ( FOR SALE
1969 124 AS Spider
2017 Abrath
2018 Alfa Romeo 4c Spider
spiderrey
Posts: 2623
Joined: Sat Jan 28, 2006 2:08 pm
Your car is a: 70 124 spider-74x19-03 ranger edge
Location: San Dimas, Ca

Re: Rebuilt

Post by spiderrey »

Ill try , others would do better here though. Piston size. From the factory, the cars come with a standard piston diameter. When rebuilding a motor, if there is any wear in the cylinder you would need to move up to the next piston size like 20 over standard, or 40 over if the cylinders are bad.
fiat218
Posts: 5745
Joined: Fri May 16, 2008 5:06 pm
Your car is a: 1969 124 AS spider

Re: Rebuilt

Post by fiat218 »

spiderrey wrote:Ill try , others would do better here though. Piston size. From the factory, the cars come with a standard piston diameter. When rebuilding a motor, if there is any wear in the cylinder you would need to move up to the next piston size like 20 over standard, or 40 over if the cylinders are bad.
Makes sense
Jim
East Grand Forks MN
1970 Fiat Spider BS1 ( FOR SALE
1969 124 AS Spider
2017 Abrath
2018 Alfa Romeo 4c Spider
User avatar
maytag
Posts: 1789
Joined: Mon Oct 19, 2009 9:22 pm
Your car is a: 1976 124 spider
Location: Rocky Mountains....UTAH! (Not Colorado)

Re: Rebuilt

Post by maytag »

Jim:
your cams will be chosen based upon any number of factors. You will want to choose your pistons and cams together, with a plan in mind. Choosing one without considering the other is unwise.

best bet is to decide what you want from the motor, and then choose your cams and pistons together at that time to build toward your plan.

Cams are probably the single-most important component in determining the nature of a build. Choosing them based on what pistons you have would be like choosing a new home based on what you want to keep in the refrigerator. :wink:
I'm no Boy-Racer..... but if I can't take every on-ramp at TWICE the posted limit.... I'm a total failure!
fiat218
Posts: 5745
Joined: Fri May 16, 2008 5:06 pm
Your car is a: 1969 124 AS spider

Re: Rebuilt

Post by fiat218 »

maytag wrote:Jim:
your cams will be chosen based upon any number of factors. You will want to choose your pistons and cams together, with a plan in mind. Choosing one without considering the other is unwise.

best bet is to decide what you want from the motor, and then choose your cams and pistons together at that time to build toward your plan.

Cams are probably the single-most important component in determining the nature of a build. Choosing them based on what pistons you have would be like choosing a new home based on what you want to keep in the refrigerator. :wink:
Ok got it, I know what I want,I just don't know how to put it together lol, but it will be done,I just put off the rebuild right ow because I like to have it all done in one shot,making sure I have 99 percent of every thing I need
Jim
East Grand Forks MN
1970 Fiat Spider BS1 ( FOR SALE
1969 124 AS Spider
2017 Abrath
2018 Alfa Romeo 4c Spider
Post Reply