2.0l engine with 1.8 heads - what FI set up to use? |
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2.0l engine with 1.8 heads - what FI set up to use? |
Tdskip |
Dec 3 2018, 07:39 AM
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#1
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Advanced Member Group: Members Posts: 3,686 Joined: 1-December 17 From: soCal Member No.: 21,666 Region Association: None |
Counter to popular belief I do not stay up late inventing hairbrained questions for you all, although that is tempting sometime given the wealth of knowledge here. As of around 10:30 AM today this will be a real life scenario.
Let’s imagine I have a 2.0l case running 1.8 heads with a single Weber that runs but I want to convert back to FI. Let’s further image that I have both a 1.8 FI set up and a 2.0 FI set up sitting in the shelf. Which FI set up would I be best advised to use on this engine, and for bonus points and adding to the community knowledge here, why? BTW - planning on doing a tech day on this with/for the SoCal mafia once I get a plan together. Given what seems to be a trend back to FI (or at least renewed interest) I think it could be a useful tech day for the community. Thanks! |
ClayPerrine |
Dec 4 2018, 06:22 AM
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#2
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Life's been good to me so far..... Group: Admin Posts: 15,423 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
Use the L-system as is will get you a good running motor. Replacing the throttle body with a VW bus throttle body will wake up the motor. You can actually feel it in the seat of your pants. But remember to leave the snorkel off the air intake, it is smaller than the throttle body with the bus throttle body on it, and causes a restriction.
Whomever said there are no differences in the L-Jet injectors is mistaken. The 912E injector flows more than a 1.8L injector. Factory 912E injectors are hard to find, but there is good news. The Datsun/Nissan 280ZX uses a Nippondenso licensed built version of the Bosch L-Jet system. The injectors for the 280ZX are identical to the 912E injectors. And they are available from FLAPS. The 1.8L heads are a bit of a restriction, but they make up for it in two ways. They have a slightly smaller combustion chamber, so you get a slight bump in compression, and they don't drop valve seats like the 2.0 heads. FYI... I have run all possible combinations of L-Jet systems over 33 years, and this is the current combination running on Betty's 400K mile 914. |
Valy |
Dec 4 2018, 02:43 PM
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#3
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Senior Member Group: Members Posts: 1,671 Joined: 6-April 10 From: Sunnyvale, CA Member No.: 11,573 Region Association: Northern California |
Use the L-system as is will get you a good running motor. Replacing the throttle body with a VW bus throttle body will wake up the motor. You can actually feel it in the seat of your pants. But remember to leave the snorkel off the air intake, it is smaller than the throttle body with the bus throttle body on it, and causes a restriction. Whomever said there are no differences in the L-Jet injectors is mistaken. The 912E injector flows more than a 1.8L injector. Factory 912E injectors are hard to find, but there is good news. The Datsun/Nissan 280ZX uses a Nippondenso licensed built version of the Bosch L-Jet system. The injectors for the 280ZX are identical to the 912E injectors. And they are available from FLAPS. The 1.8L heads are a bit of a restriction, but they make up for it in two ways. They have a slightly smaller combustion chamber, so you get a slight bump in compression, and they don't drop valve seats like the 2.0 heads. FYI... I have run all possible combinations of L-Jet systems over 33 years, and this is the current combination running on Betty's 400K mile 914. @ClayPerrine where did you get the info about the different injectors flow, can you please share? BOSCH claims they are all the same, here is the spec from Bosch catalog. https://drive.google.com/file/d/0B7nmo8cXp0...ew?usp=drivesdk |
914_teener |
Dec 4 2018, 04:04 PM
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#4
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914 Guru Group: Members Posts: 5,197 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
Use the L-system as is will get you a good running motor. Replacing the throttle body with a VW bus throttle body will wake up the motor. You can actually feel it in the seat of your pants. But remember to leave the snorkel off the air intake, it is smaller than the throttle body with the bus throttle body on it, and causes a restriction. Whomever said there are no differences in the L-Jet injectors is mistaken. The 912E injector flows more than a 1.8L injector. Factory 912E injectors are hard to find, but there is good news. The Datsun/Nissan 280ZX uses a Nippondenso licensed built version of the Bosch L-Jet system. The injectors for the 280ZX are identical to the 912E injectors. And they are available from FLAPS. The 1.8L heads are a bit of a restriction, but they make up for it in two ways. They have a slightly smaller combustion chamber, so you get a slight bump in compression, and they don't drop valve seats like the 2.0 heads. FYI... I have run all possible combinations of L-Jet systems over 33 years, and this is the current combination running on Betty's 400K mile 914. @ClayPerrine where did you get the info about the different injectors flow, can you please share? BOSCH claims they are all the same, here is the spec from Bosch catalog. https://drive.google.com/file/d/0B7nmo8cXp0...ew?usp=drivesdk (IMG:style_emoticons/default/popcorn[1].gif) |
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