Injection for an Essex

Ethanol · Post by **Ethanol** » Tue Feb 05, 2019 5:07 pm

I have a 1979 W reg Scimitar and I want to fit a multi-point injection system. Has anyone else done it?

Post by **philhoward** » Tue Feb 05, 2019 5:12 pm

http://www.scimitarweb.co.uk/sgwrs/view ... on#p390006

Ethanol · Post by **Ethanol** » Sun Feb 24, 2019 5:05 am

That looks expensive my own engine is has a Weber DGAS, I'll fit a mega squirt ECU, convert the DGAS to a throttle body with a Volvo TPS fit the injectors and fuel rail from a 350Z. A Bosch inline pump. I need an injection system to convert my engine to ethanol.

Post by **philhoward** » Sun Feb 24, 2019 7:52 am

Are 350z injectors ethanol safe? I’ve seen mention of specific injectors for ethanol but usually referring to specific vehicles for the Brazilian market although Saab did an E85-compatible engine (and I’m sure others did too).

As a side note, that’s an odd choice for a Profile Signature:

“Although ethanol has 3/4 the energy density of petrol it has really high octane I think if we convert to ethanol with high enough compression we can achieve more power. 275HP might be possible with an Essex engine, but you would need 16.5 to 1 compression.”

Did you mean to reply to a post rather than add it as a signature?

Post by **scimjim** » Sun Feb 24, 2019 9:00 am

The Essex would be a good start for E100 as the additional loads at those kind of CR numbers would wreck most engines. The Essex is over-engineered thanks to it’s planned diesel application. It’s an interesting subject that hasn’t really taken off (despite being around for decades).

MikeyBikey · Post by **MikeyBikey** » Sun Feb 24, 2019 9:01 am

philhoward wrote: ↑
Sun Feb 24, 2019 7:52 am
As a side note, that’s an odd choice for a Profile Signature:

“Although ethanol has 3/4 the energy density of petrol it has really high octane I think if we convert to ethanol with high enough compression we can achieve more power. 275HP might be possible with an Essex engine, but you would need 16.5 to 1 compression.”

Did you mean to reply to a post rather than add it as a signature?

Still shorter then yours phil

Post by **philhoward** » Sun Feb 24, 2019 9:10 am

Which is shorter than Jim’s

Post by **Coupe Racing** » Sun Feb 24, 2019 11:49 am

The hardest part is modifying the inlet manifold to accept injectors esp the centre 2 as you won't get much of an angle

Ethanol · Post by **Ethanol** » Sun Feb 24, 2019 12:22 pm

The heavy build of the Essex engine is one reason why I use it. The heron head is the other, I was able to get cast pistons to fit easier I didn't need to go to the expense of forged domed pistons because of ethanol's low energy density. As the ethanol engine was an MoD radar station emergency generator I don't know what kind of cam it's got fitted. I do know if I re-built my Scimitar Essex to 16.5 to 1 it would do 275HP

Post by **efi_sprintgte** » Sun Feb 24, 2019 1:02 pm

Ethanol wrote: ↑
Tue Feb 05, 2019 5:07 pm
I have a 1979 W reg Scimitar and I want to fit a multi-point injection system. Has anyone else done it?

We built a sprint car that ran a triple carb inlet manifold with 6 TBs. Proved to be far more tractable then triple carbs.

I don’t see how you can get that kind of CR from a Essex and still clear the valves? 11:1 is tight with 300/310 deg cam.

Ethanol · Post by **Ethanol** » Sun Feb 24, 2019 1:17 pm

As I said I don't know what cam it has, it might be the distance the piston is from the head at tdc

Post by **scimmy_man** » Sun Feb 24, 2019 2:29 pm

philhoward wrote: ↑
Sun Feb 24, 2019 9:10 am
Which is shorter than Jim’s

er???

Post by **philhoward** » Sun Feb 24, 2019 3:04 pm

scimmy_man wrote: ↑
Sun Feb 24, 2019 2:29 pm

philhoward wrote: ↑
Sun Feb 24, 2019 9:10 am
Which is shorter than Jim’s
er???

I was referring to the signature, Mike.

Post by **scimmy_man** » Sun Feb 24, 2019 4:16 pm

of course you were

Ethanol · Post by **Ethanol** » Mon Feb 25, 2019 12:15 pm

The injectors as is are might not be ethanol safe, but once I've remanufactured them they will be.