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cgnj |
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#1
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Senior Member ![]() ![]() ![]() Group: Members Posts: 645 Joined: 6-March 03 From: Medford, NJ Member No.: 403 Region Association: None ![]() ![]() |
I have always wanted to do ITB FI for my 2270. I found a box in my stash of parts with a DRLA 45 with one of the air bypass screws stripped. I found this thread on STFSTF IDF/DRLA to throttle body.. I guess I would have to block off everything above the throttle plate, and machine my manifolds to for injectors. Feedback on this idea is appreciated
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technicalninja |
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#2
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Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 2,121 Joined: 31-January 23 From: Granbury Texas Member No.: 27,135 Region Association: Southwest Region ![]() ![]() |
Not necessarily. I use my triple Webers as TBs and don’t use a TPS @mb911 My GOLDEN rule is "There are always exceptions to the rules" Someone will ALWAYS prove your wrong... Now, without a TPS (or something else) an electronic brain cannot ANTICIPATE increased load. You effectively have no accelerator pump circuit. A non-TPS system will ALWAYS be "catching up" and does not have the ability to add fuel BEFORE it sees a change in either RPM (ignition) or load (MAP/MAF/airflow meter) Unless your guru has come up with another way to add fuel at throttle tip in, I'm positive that adding a TPS will improve throttle response. Do you log? I'd WANT to know what my AFRs did during hard acceleration. With no acceleration additions I'd expect it to show lean. Bosch's simplest electronic FI was the mono-jet (TBI for GM, CFI for Ford). This system has four main inputs. TPS, O2, RPM, and engine temp. It had NO "load sensing" at all. One thing to remember, a TPS shows throttle position AND rate of change. You hammer the throttle; the FI will provide more fuel than if you opened it slowly. The TPS is a requirement in my book... |
emerygt350 |
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#3
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Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 2,516 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States ![]() |
Not necessarily. I use my triple Webers as TBs and don’t use a TPS @mb911 My GOLDEN rule is "There are always exceptions to the rules" Someone will ALWAYS prove your wrong... Now, without a TPS (or something else) an electronic brain cannot ANTICIPATE increased load. You effectively have no accelerator pump circuit. A non-TPS system will ALWAYS be "catching up" and does not have the ability to add fuel BEFORE it sees a change in either RPM (ignition) or load (MAP/MAF/airflow meter) Unless your guru has come up with another way to add fuel at throttle tip in, I'm positive that adding a TPS will improve throttle response. Do you log? I'd WANT to know what my AFRs did during hard acceleration. With no acceleration additions I'd expect it to show lean. Bosch's simplest electronic FI was the mono-jet (TBI for GM, CFI for Ford). This system has four main inputs. TPS, O2, RPM, and engine temp. It had NO "load sensing" at all. One thing to remember, a TPS shows throttle position AND rate of change. You hammer the throttle; the FI will provide more fuel than if you opened it slowly. The TPS is a requirement in my book... Handling tip in comes up quite a bit when I researched the Ford cfi on the gt350. There were many variants in just Ford alone between 83 and the last of the cfis and even across applications during any year. It is neat how d-jet handled it. |
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