Carbs with a FI cam |
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Carbs with a FI cam |
malcolm2 |
Mar 11 2019, 08:30 PM
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#1
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Advanced Member Group: Members Posts: 2,747 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
So everyone has heard it. Carbs don’t mix well with a fuel injection cam. But what are the symptoms?
I have a spare 1.8 that should run. I want to put it in my 72 bus project. All i have for induction is the dual carbs that came with the bus. I plan on cracking open the 1.7 that came with the bus, but i would like to drive ASAP. So what should i expect on how the 1.8 engine runs with carbs? |
mark04usa |
Mar 11 2019, 08:38 PM
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#2
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'70 1.7 Tangerine Group: Members Posts: 351 Joined: 14-September 09 From: Austin TX Member No.: 10,805 Region Association: Southwest Region |
Idle problems cold or hot and bad flat spot on acceleration. If you are really good with carbs you can work those problems out somewhat. I went back to original FI and found that to be my best solution to fuel problems. (IMG:style_emoticons/default/beerchug.gif)
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Chi-town |
Mar 11 2019, 11:03 PM
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#3
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Senior Member Group: Members Posts: 851 Joined: 31-August 18 From: Disneyland Member No.: 22,446 Region Association: Southern California |
I thought someone checked the cam part number for the European carbed cars and found it was the same as the US injected cars?
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ClayPerrine |
Mar 12 2019, 05:54 AM
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#4
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Life's been good to me so far..... Group: Admin Posts: 15,820 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
I thought someone checked the cam part number for the European carbed cars and found it was the same as the US injected cars? Yes, it is the same cam in both. But the Euro 1.8 had a pair of 1barrell bus carbs on it, and they never really worked well, even from the factory. |
BK911 |
Mar 12 2019, 06:23 AM
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#5
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Senior Member Group: Members Posts: 672 Joined: 19-February 04 From: Rocky Top, TN Member No.: 1,674 Region Association: None |
Carbs work fine with the FI cams.
Running a stock 1.7 with dual empis for over 10 years now. And a 009 dizzy!! Vroom vroom!! |
Mark Henry |
Mar 12 2019, 07:26 AM
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#6
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Works fine, bay window busses were carbed till '75-'76 in NA. Mileage won't be as good as FI, but unless it's a DD this might not be much of a issue.
Carbs work fine with the FI cams. Running a stock 1.7 with dual empis for over 10 years now. And a 009 dizzy!! Vroom vroom!! I did an econo stock 1.8 DTM T4 conversion into a bug several years ago, the guy wanted a bigger engine but didn't have the coin. I told him this would get him rolling till he saved the benjamins for a big build, and the 1.8 still had 30hp over a stock T1. I see him every year at the local show, I asked last year if he was ever going to do a big engine, he said, "Naw...the bug runs too good to mess with it." |
jdamiano |
Mar 12 2019, 07:44 AM
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#7
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Member Group: Members Posts: 335 Joined: 18-March 18 From: Jacksonville Member No.: 21,981 Region Association: South East States |
I purchased my 2.0 with a Redline Weber 40 kit already installed with a 009 distributor. Ran OK. Stock cam. When I replaced the distributor with the Petronix it started running great. I think the curve on the Petronix is something between a 009 and a 050.
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timothy_nd28 |
Mar 12 2019, 08:46 AM
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#8
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Advanced Member Group: Members Posts: 2,299 Joined: 25-September 07 From: IN Member No.: 8,154 Region Association: Upper MidWest |
It would be a cool project, 1.8 with Ljet in your bus. You should do it, unless the Ljet scares you (IMG:style_emoticons/default/biggrin.gif)
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tejon007 |
Mar 12 2019, 10:37 AM
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#9
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Newbie Group: Members Posts: 45 Joined: 10-February 10 From: Northern California Member No.: 11,344 Region Association: None |
Many years ago, about 30+...put a 1.7 from a 1971 914 into our 1972 Westfalia bus which originally had a 1.7. It helped her get up the hills a little better. Stock cam, Weber progressive and a 009 distributor. More torque and HP than the stock bus motor.
IIRC, the flywheel/clutch is a little smaller on the bus and you'll need to check/fill the oil via the top cover inside the bus. Don't think the bus case would be a good option job for the 914, as the oil filler & dipstick location isn't good...but, you can block it off at the case and drill for a relocated dipstick. |
malcolm2 |
Mar 12 2019, 10:42 AM
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#10
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Advanced Member Group: Members Posts: 2,747 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
It would be a cool project, 1.8 with Ljet in your bus. You should do it, unless the Ljet scares you (IMG:style_emoticons/default/biggrin.gif) no way. I think I would prefer L-Jet. I think I have it figured out well enough to be dangerous.... But it has been so long that I have had to mess with it, I'll have to call this guy I know if something happens. (IMG:style_emoticons/default/piratenanner.gif) (IMG:style_emoticons/default/piratenanner.gif) I am still hoping for a pay-it-forward L-Jet complete system donation (IMG:style_emoticons/default/KMA.gif) I have rebuilt the Holley on my boat and replaced the $14 carb on my Briggs and Stratton. I should be ok with 45 year old dual carbs that haven't been used for 15 years. |
malcolm2 |
Mar 12 2019, 10:51 AM
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#11
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Advanced Member Group: Members Posts: 2,747 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
IIRC, the flywheel/clutch is a little smaller on the bus and you'll need to check/fill the oil via the top cover inside the bus. Yeah, the 72 bus does not have the hatch in the rear shelf. I have been planning on cutting that out. Gotta find someone that will cut one out of a JY 73+ bus. Dip stick might be tricky. But my Accord uses a wire cable for a dip stick. Something like that may have to be fabbed up. another difference in the TIV 914 vs the TIV bus is the fuel pump. bus uses mechanical. So I'll be converting to low pressure electric. Not planning on cracking open the spare 1.8. If everything works out, using the 1.8 will be temporary. (IMG:style_emoticons/default/lol-2.gif) |
timothy_nd28 |
Mar 12 2019, 01:12 PM
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#12
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Advanced Member Group: Members Posts: 2,299 Joined: 25-September 07 From: IN Member No.: 8,154 Region Association: Upper MidWest |
It would be a cool project, 1.8 with Ljet in your bus. You should do it, unless the Ljet scares you (IMG:style_emoticons/default/biggrin.gif) no way. I think I would prefer L-Jet. I think I have it figured out well enough to be dangerous.... But it has been so long that I have had to mess with it, I'll have to call this guy I know if something happens. (IMG:style_emoticons/default/piratenanner.gif) (IMG:style_emoticons/default/piratenanner.gif) I am still hoping for a pay-it-forward L-Jet complete system donation (IMG:style_emoticons/default/KMA.gif) I have rebuilt the Holley on my boat and replaced the $14 carb on my Briggs and Stratton. I should be ok with 45 year old dual carbs that haven't been used for 15 years. It's like riding a bicycle. What parts are you missing for a running Ljet? Consider dumping the carbs on your boat and lawnmower, Ljet everything! (IMG:style_emoticons/default/biggrin.gif) |
914 Ranch |
Mar 13 2019, 01:58 AM
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#13
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Team Sharp where the 914 grow wings Group: Members Posts: 1,435 Joined: 29-January 16 From: TheNorth Shore Retreat. Deland Member No.: 19,611 Region Association: South East States |
L jets are great to carb. The barn door is an aspirated system, so are carbs.
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SirAndy |
Mar 13 2019, 11:32 AM
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#14
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Resident German Group: Admin Posts: 41,815 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
It'll run ok with carbs if you can get them tuned in correctly, but you'll be leaving power and torque on the table.
(IMG:style_emoticons/default/shades.gif) |
malcolm2 |
Mar 13 2019, 11:38 AM
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#15
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Advanced Member Group: Members Posts: 2,747 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
I thought someone checked the cam part number for the European carbed cars and found it was the same as the US injected cars? Yes, it is the same cam in both. But the Euro 1.8 had a pair of 1barrell bus carbs on it, and they never really worked well, even from the factory. I suppose that is what I am going to get myself into. I’ll have to take another look at the carbs from the bus. |
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