914World.com [Powered by Invision Power Board]

Posted by: zfisher6164 Aug 9 2019, 01:28 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

Posted by: jim_hoyland Aug 9 2019, 02:11 PM

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.

Posted by: IronHillRestorations Aug 9 2019, 04:08 PM

There's not a whole lot you can do with stock injection

Posted by: jim_hoyland Aug 9 2019, 05:31 PM

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)

Posted by: jcd914 Aug 9 2019, 06:50 PM

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

Posted by: Ed_Turbo Aug 9 2019, 06:51 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

Posted by: jim_hoyland Aug 9 2019, 07:11 PM

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

the Exhaust is a limiting factor.

Posted by: 914Sixer Aug 10 2019, 10:20 AM

Use 2.0L throttle body from a VW Bus.

Posted by: zfisher6164 Aug 10 2019, 10:43 AM

Thanks Jim this is great info

Posted by: dr914@autoatlanta.com Aug 10 2019, 10:47 AM

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)