User Login    
 + Register
  • Main navigation
Login
Username:

Password:


Lost Password?

Register now!
Fast Search
Slow Search
Google Ad


[Datsun 1200 encyclopedia]

EFI Manifold

From Datsun 1200 Club

Datsun 1200 encyclopedia | Recent changes | Edit this page | Page history | Switch to MediaWiki mode

Printable version | Disclaimers | Privacy policy
Categories: Manifold | Fuel System | Fuel Injection

To convert your engine to EFI can obtain a factory EFI manifold or use the stock downdraft manifold with an EFI throttle body, buy a port-injection manifold, or make your own.

 Also see: Turbo Inlet Manifolds

Contents

Overview

Most EFI inlet manifolds are of the 'log' type - with (for an inline four motor for example) 4 downward runners that curve inward to the ports in the head, and a 'log' across the top connecting them. As agricultural as that sounds, it creates a necessary/desirable amount of turbulence and helps keep fuel suspended and satisfactorily distributed and mixed to produce good power -- and without danger of leaning out. This is use with a single throttle body at the entrance to the log. Using a large TB mean it can flow as much HP as the engine needs -- log manifold are not limited in power. The log acts as the plenum (air chamber) feeding the cylinders.

Log manifold with tuned-length runners (short for maximum HP at high RPM)
26377.jpgAlbum click to view

Log manifold with long runners (for maximum HP at medium RPMs)
661.jpgAlbum click to view

The alternative is the Individual Throttle Body (ITB) which uses four throttle bodies, and a single runner for each cylinder. It can be with a plenum, or without. Without plenum means it is highly susceptible to RPM, and with a plenum means the torque curve is fatter. ITB w/o plenum does not make more HP than without, though it does look cool.

ITB
7303.jpgAlbum click to view

Factory EFI

Datsun made a factory EFI manifold for the A-series engine.

21849.jpgAlbum click to view 2758.jpgAlbum click to view

Buffalo

Buffalo made an aftermarket manifold for their South African-made ATV project, now since discontinued.

Danie van Vuuren supplied all the fuel injection components for the Buffalo ATV project. The intake manifold is custom made & high quality. Price about R1800.00 as of September 201 for the bare intake manifold. Danie can supply you a complete setup or just the bare manifold.

26377.jpgAlbum click to view

390435_10150519049674757_607719756_8518826_1926037262_n.jpg Buffalo1272007_1.jpg

DCOE Conversion

Many EFI kits are available for a Weber DCOE carburetor manifold.

See main artice: EFI

EFI on A14
EFI.jpg

Delorto

13322.jpgAlbum click to view 13321.jpgAlbum click to view 13320.jpgAlbum click to view

Bike Manifold

Instead of Bike Carbs, how about Bike EFI? Motorcycle throttle bodies are a cost-effective way to go.

gx1200

9441.gifAlbum click to view

* Kawasaki 1100 Throttle bodies
* Nissan RB30 injectors
* Microtech MT4 ECU
* Bosch pre pump and main pump
* Custom intake runners on standard intake flanges
* A15 Has had rings and bearings and a mild cam. 
  Other than that its standard
* 57KW atw (43 rwhp, or about 54 engine HP)

His A15 probably had the low-RPM camshaft and round-port cylinder head from a Vanette, rather than the 80HP A15 from a B310.

rally1200 bike

35mm motor bike throttle bodies with injectors inbuilt
15077.jpgAlbum click to view

19835.jpgAlbum click to view

24290.jpgAlbum click to view

20918.jpgAlbum click to view

20917.jpgAlbum click to view

7303.jpgAlbum click to view 7020.jpgAlbum click to view 7016.jpgAlbum click to view 7015.jpgAlbum click to view 5747.jpgAlbum click to view

Custom

A tuned-runner manifold would not be hard to make one out of some steel tubing and a bit of 10mm plate for the flange, just need a throttle body around 50mm.

661.jpgAlbum click to view

quote: Figure out exactly what you want, take some dimentions and a spare cyl head (if you have one) to an aluminum or stainless steel fabrication place eg, aluminium boat builder, have it fabricated ,then machined and bob's your uncle, you have an injection manifold. I'm an aluminium boat builder by trade, so I couldnt see it costing anymore than $250 - $350 max

2365.jpgAlbum click to view

9275.jpgAlbum click to view

1477.jpgAlbum click to view 1727.jpgAlbum click to view 1815.jpgAlbum click to view 2057.jpgAlbum click to view 2058.jpgAlbum click to view 3268.jpgAlbum click to view 3884.jpgAlbum click to view

Dimlights's UM-1
301.JPGAlbum click to view 300.JPGAlbum click to view 302.JPGAlbum click to view

Empson's innovative intake manifold allows use of stock exhaust manifold
inlet2.jpg

You could also use a modified Hilborn injection manifold (A15 manifold with injector bosses welded on)
4069.jpgAlbum click to view

zigmondo
16236_5b4c4a8486819.jpgPost click for topic

3rotor

post

Runner lengths are 225mm and can be adjusted by altering the silicone connectors.

3372384028_5ff7f7b9fa.jpg 3372382526_666c4e7cfb.jpg 3372382642_65d60d6462.jpg 3371562025_ffcfb480a4.jpg 3371562159_e43ef6ca8c.jpg 3372383074_8ce6225564.jpg 3372383306_6a2d8c8c52.jpg 3371562737_a930e0f019.jpg

bigv

7430.jpgAlbum click to view

22" runners, length tuned for torqe. For maximum high-RPM power, the diameter should be increased 7407.jpgAlbum click to view

Two-piece runners
7408.jpgAlbum click to view

rally1200 DCOE

rally1200 EFI on aftermarket DCOE manifold

23200.jpgAlbum click to view

23199.jpgAlbum click to view

23199.jpgAlbum click to view

Air horns
23198.jpgAlbum click to view

Extensive heat shield
23197.jpgAlbum click to view

rally1200 log

5631.jpgAlbum click to view

5747.jpgAlbum click to view

The_Engine_Room

18181_5728b8ed6c09b.jpgPost click for topic

Lamb_Daiquiri

11744_57288bb983dcf.pngPost click for topic

Whitley

705_5d17f711e6bcb.jpgPost click for topic 

s

Retrieved from "http://datsun1200.com/modules/mediawiki/index.php?title=EFI_Manifold"

This page has been accessed 10,347 times. This page was last modified 00:35, 2 November 2019. Content is available under Datsun 1200 Club.