Cheap, simple, non-factory FI solution, parts, etc..., Type IV - This oughta be fun... |
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Cheap, simple, non-factory FI solution, parts, etc..., Type IV - This oughta be fun... |
Gint |
Jun 4 2009, 04:39 PM
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#1
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Mike Ginter Group: Admin Posts: 16,083 Joined: 26-December 02 From: Denver CO. Member No.: 20 Region Association: Rocky Mountains |
I've thought about doing a Megasquirt for a while now to replace my carbs. I have a Mallory that works great, so to keep the initial cost down as well as keep it simple, I want to do fuel only, but have an upgrade path available for ignition later. Ideally if this could be done for under $500 that would be fantastic.
So... What is the easiest, cheapest, most simple solution for induction parts? Throttle bodies, injectors, TPS, etc...? Which MS unit has the flexibility to do fuel now and ignotion later without starting all over again with a different ECU? Engine is a 2056 that is built on a 1.8 case and heads with a 2.0 crank, rods and P/Cs. Currently running dual Weber 40 IDFs. (IMG:style_emoticons/default/idea.gif) (my own note: 40 IDF 70 9A, Italy) |
McMark |
Jun 10 2009, 01:07 PM
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#2
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
You can see the little black vacuum port in the foreground. This is not the only layout, so there are some that don't look exactly like this. But this gives you an idea of how it work.
MS can get a signal from a Mallory or other ignition system, but it's a DIRTY signal. I was absolutely blown away when I saw a crank fire signal compared to all the nasty tach signals I had been used to. People are using tach signals to 'feed' their MS and it works. I wouldn't recommend it to anyone since it's just another source of possible hiccups and headaches. And crank fire is so easy to do. All stock 914 injectors are low impedance. All modern FI systems require high impedance. You can 'tweak' the stock injectors to work by installing a resistor pack inline with the injectors to 'fake it'. Which works fine, but I don't like having that extra piece of electronics hanging out somewhere. The resistors get quite hot. I have a source for high impedance injectors that fit stock manifolds, but they're well out of your initial budget. Attached image(s) |
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