Carbs or Fuel injection ? |
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Carbs or Fuel injection ? |
ILM914 |
Oct 24 2022, 09:51 AM
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#1
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Member Group: Members Posts: 98 Joined: 3-March 09 From: NC Member No.: 10,126 Region Association: None |
Hi folks a 914"expert said carbs will burn the valves on a 914 and not run well. Is this true? is the fuel economy worse when using duel carbs? Would you run orig fuel injection on a 2.0 or carbs thank you, Joe
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Jack Standz |
Oct 24 2022, 10:55 AM
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#2
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Member Group: Members Posts: 363 Joined: 15-November 19 From: Happy Place (& surrounding area) Member No.: 23,644 Region Association: None |
Hi folks a 914"expert said carbs will burn the valves on a 914 and not run well. Is this true? is the fuel economy worse when using duel carbs? Would you run orig fuel injection on a 2.0 or carbs thank you, Joe Sorry, but FI isn't always best for a 914!! Try telling that to anyone with an original 914/6. As I remember it, they all came with carbs. So, run what you want. Either FI or carbs can be a good choice. Dual carbs will run well, if you properly tune them even on a modified motor. Why? Because you can tune the heck out of them. You can't do that with stock fuel injection. Once the stock fuel injection hits its limits, you'll need to go to an after market FI system or modify the stock FI system. Stay away from the single carb systems. Burnt valves can happen from running the motor too lean (either carb or FI), which causes the motor to run too hot and the exhaust valves can just get cooked til they die. Also, as mentioned, not checking valve clearances often enough and running the lash too tight can also burn the valves. As to fuel economy, FI generally has the slight edge. But, again you can tune the carbs to optimize fuell economy and considering the form of FI the stock 914/4 came with (not as good as modern FI systems), you'll be just fine, if you choose to run carbs. So, if you have FI, run it. If you have carbs, run them. |
lesorubcheek |
Oct 24 2022, 11:41 AM
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#3
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Member Group: Members Posts: 193 Joined: 21-April 21 From: Florida Member No.: 25,463 Region Association: South East States |
Sorry, but FI isn't always best for a 914!! Try telling that to anyone with an original 914/6. As I remember it, they all came with carbs. So, run what you want. Either FI or carbs can be a good choice. Dual carbs will run well, if you properly tune them even on a modified motor. Why? Because you can tune the heck out of them. You can't do that with stock fuel injection. Once the stock fuel injection hits its limits, you'll need to go to an after market FI system or modify the stock FI system. Stay away from the single carb systems. Burnt valves can happen from running the motor too lean (either carb or FI), which causes the motor to run too hot and the exhaust valves can just get cooked til they die. Also, as mentioned, not checking valve clearances often enough and running the lash too tight can also burn the valves. As to fuel economy, FI generally has the slight edge. But, again you can tune the carbs to optimize fuell economy and considering the form of FI the stock 914/4 came with (not as good as modern FI systems), you'll be just fine, if you choose to run carbs. So, if you have FI, run it. If you have carbs, run them. (IMG:style_emoticons/default/agree.gif) It really comes down to what you want from your car. If you want a pristine original example, FI is the obvious choice. If you want a little more power and getting that on a budget, a new cam and carbs is a relatively easy path. Our car was fitted with dual IDFs ever since we got it in 1980, so I can't compare to an original FI car, but it was reliable and fun with plenty of pep. Highway driving was easy to get around 30mpg. City was obviously worse, but never tried to calculate since never drove just in town. Carbs are not evil, just not as efficient as a properly setup FI system. You could make the same argument that old D and L jet FIs are not as efficient as newer systems. Use whatever you decide is the best overall choice based upon your criteria, after all, it's your car. Just enjoy it. Dan |
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