 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / December 2005Carburettor question
I have a Ford Festiva with a carburetted 1.3L engine. The engine needs a carb producing about 140 CFM to run it. I have no idea what the CFM the stock carburettor is rated for, but it runs the 1.3L engine fine. My plans are to replace the engine with a 1.6L engine that normally takes 170 CFM to run. If I use the stock Festiva carburettor on this larger engine, will the engine run poorly or will the small carb (let's say the carb's rated at 140 CFM for argument's sake) do fine? Regards, Tim >I have a Ford Festiva with a carburetted 1.3L engine. The engine needs >a carb producing about 140 CFM to run it. I have no idea what the CFM [quoted text clipped - 6 lines] >engine run poorly or will the small carb (let's say the carb's rated at >140 CFM for argument's sake) do fine? An under carburetted engine will run fine, albeit with a slight reduction in maximum power output, provided the carburettor is tuned to suit the engine. The chances that a carburettor from a different model will be correctly tuned (jet sizes, etc) are virtually zero. Anyone experienced at carburettor tuning would probably have little difficulty making the necessary adjustments. Anyone who needs to the ask the question would probably find it extremely difficult. :)  SignatureJohn H There is (was) a Ford Festiva owner's website (www.festiva.com ?) with links to some engine exchanges. You might get some info there. One owner put a Harley Davidson engine in his Festiva. :) I drive a carburetted '89 Festiva but have not touched the carburettor. It would be a learning experience I don't want to have to face. > I have a Ford Festiva with a carburetted 1.3L engine. The engine needs > a carb producing about 140 CFM to run it. I have no idea what the CFM [quoted text clipped - 10 lines] > > Tim It will run smootly, but you will not have as much top end power. If you drive conservatively, and never punch wide open throttle, you may not notice the difference. In fact, at lower rpm and throttle opening, the drivability may even be slightly improved. In a sense, what you will do will be putting a governor on the engine. It will be the same as putting a throttle stop on the carb to prevent wide open throttle. Normally I don't go past 3000 RPM in any gear. However, what I do want is a bit more power when taking off from a stop as well as some when I'm overtaking somebody on the highway. 73, Tim > Normally I don't go past 3000 RPM in any gear. > > However, what I do want is a bit more power when taking off from a stop > as well as some when I'm overtaking somebody on the highway. > 73, > Tim A ham radio operator too? I think that the carburetor you have might well be enough for the 1.6 engine. There isn't that much difference in a 1.3 and a 1.6, and those carburetors often have a good bit of leeway in them. I would try it first. You will have to readjust the idle circuits, almost for sure. You may or may not have to rejet. Go one step at the time. >>Normally I don't go past 3000 RPM in any gear. >> [quoted text clipped - 13 lines] > for sure. > You may or may not have to rejet. Go one step at the time. dumb question. why not just use the carburetor that comes with the 1.6 engine? nate Signaturereplace "fly" with "com" to reply. http://home.comcast.net/~njnagel > dumb question. why not just use the carburetor that comes with the 1.6 > engine? > > nate I wouldnt be at all surprised, knowing Ford, if they were exactly the same. If you had a good carburetor on the old engine, it might beat guessing about the unit on the swapper... But, your point is very valid. |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.