 74 1.8L L jet tronic, Best option to get more power???? |
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| zfisher6164 |
 Aug 9 2019, 01:28 PM
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#1
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Newbie  Group: Members Posts: 41 Joined: 19-January 19 From: California Member No.: 22,809 Region Association: None 
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Looking to get more HP from a 1.8L L jet. Would like to keep fuel injection so going bigger then 2.0 maybe out of the question unless you guys have any other ideas
thanks |
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| jim_hoyland |
Aug 9 2019, 02:11 PM
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#2
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Get that VIN ? Group: Members Posts: 9,308 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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I did the 96mm P/C,1-2-3 distributer, and larger Vanagon throttle body.This was the least that would make a imorovement.
While at the recent Route 66 at Lake Havasu, Matty900 and a friend took my car out for a “test” drive. I think he could recommend further mods that would further performance. |
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| IronHillRestorations |
Aug 9 2019, 04:08 PM
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#3
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I. I. R. C. Group: Members Posts: 6,721 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None
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There's not a whole lot you can do with stock injection
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| jim_hoyland |
Aug 9 2019, 05:31 PM
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#4
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Get that VIN ? Group: Members Posts: 9,308 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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Several years ago, I met a local teener that had a modified 1.8 L-Jet
Got to drive the car; it has serious pulling power. The owner sent me an email describing his mods, here is a copy of it. **And, he had the Tangerine Exhaust.... Attached thumbnail(s) 
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| jcd914 |
Aug 9 2019, 06:50 PM
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#5
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Advanced Member Group: Members Posts: 2,081 Joined: 7-February 08 From: Sacramento, CA Member No.: 8,684 Region Association: Northern California |
Stock L-jet will support an engine larger that 2.0L with just some larger injectors and some tuning. I have heard 2.2L but have not experience beyond 2056cc.
The 912E used L-jet on a stock 2.0L 914 engine. Jim |
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| Ed_Turbo |
Aug 9 2019, 06:51 PM
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#6
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Member Group: Members Posts: 440 Joined: 5-June 17 From: Hacienda Heights, Ca. Member No.: 21,151 Region Association: Southern California |
Nice info. Jim. I was about to say the exhaust system is restrictive and would help gain some ponies. If you notice the airbox intake is right in the middle of the engine, which is basically sucking in hot air (losing power). If you can re-route it to the grill like the non early 911’s do that will help.
-Ed |
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| jim_hoyland |
Aug 9 2019, 07:11 PM
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#7
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Get that VIN ? Group: Members Posts: 9,308 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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QUOTE(Ed_Turbo @ Aug 9 2019, 05:51 PM)  Nice info. Jim. I was about to say the exhaust system is restrictive and would help gain some ponies. If you notice the airbox intake is right in the middle of the engine, which is basically sucking in hot air (losing power). If you can re-route it to the grill like the non early 911’s do that will help. -Ed (IMG:style_emoticons/default/agree.gif) the Exhaust is a limiting factor. |
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| 914Sixer |
Aug 10 2019, 10:20 AM
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#8
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914 Guru Group: Members Posts: 8,892 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region
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Use 2.0L throttle body from a VW Bus.
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| zfisher6164 |
Aug 10 2019, 10:43 AM
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#9
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Newbie Group: Members Posts: 41 Joined: 19-January 19 From: California Member No.: 22,809 Region Association: None
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Thanks Jim this is great info
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| dr914@autoatlanta.com |
Aug 10 2019, 10:47 AM
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#10
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914 Guru Group: Members Posts: 7,873 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
first thing is to check the compression adjust the valves and check for vacuum leaks, all three make the fuel injected 1.8 anemic. The only other thing that you can really do that is fairly easy is to install a 96 mm big bore 8.0 to one compression piston and cylinder kit. The heads are good as they sit
QUOTE(zfisher6164 @ Aug 9 2019, 12:28 PM) Looking to get more HP from a 1.8L L jet. Would like to keep fuel injection so going bigger then 2.0 maybe out of the question unless you guys have any other ideas thanks |
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| zfisher6164 |
Aug 10 2019, 11:03 AM
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#11
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Newbie Group: Members Posts: 41 Joined: 19-January 19 From: California Member No.: 22,809 Region Association: None
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Thanks Lionel and the fuchs I bought from you came out looking great after a polish
zac Attached thumbnail(s) 
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