Jump to content

Recommended Posts

Posted
1 hour ago, HumberSS said:

So school me on this shit. On the 4V in the Dyna I'm weighing up the idea of a speeduino efi conversion. Maybe a future project once running, or maybe before.. my reasons are that I need a set of plug leads, which will set me back a few hundy, and the carb needs a rekit. After which it will still be a leaky carb.. ive previously discovered 2zz toyota coils fit perfectly (conveniently also dirt cheap and common), and was thinking I'd drill/weld bosses to factory manifold for the injectors. Might do this anyway to give the future option if i dont commit immediately. I'd have to run wasted spark, and apparently I wouldn't need cam phasing due to it being a wasted spark v8. So crank trigger and throw the dizzy away? And how many teeth? Curious as to best injectors (300hp would be ambitious for this donk). I like the idea of being able to tune for economy rather than outright power, no shitty fuel seeping carb and associated smells, and all-weather consistent running. I don't like the scope creep, but am entertaining nonetheless. Hardware wise it appears simple, of course the devil will be in the detail. Fuel pump and delivery setup recommendations also welcome. Speeduino recommendations? TPS? MAP? Throttle body or just gut the carb and use?? Apologies for naivety.

Id be trying to get a set of 12hole injectors around the 320cc range

The 1GRFE injectors Denso 23209-39075 are 320cc should be pretty easy to get (you can also bump the fuel pressure up if you need some more headroom)

With it being an older V8 id be wanting some head room :) but an injector calculator recons you can get away with circa 250cc (80% duty) so 70cc should be plenty of headroom

  • Like 2
  • Replies 2.4k
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted
On 14/10/2024 at 18:26, yoeddynz said:

Definitely go for a 36-1 trigger wheel. Run wasted spark and batch injection and even the basic Speeduino will still give you the ability to tune the lot to run way better than any carb will.

Its all basic stuff and once you get stuck in its super fun to learn and quite addictive to keep striving for an even better tune.

Have a chat with @kws about Speeduino. He's been down that road already.

I still think there's better support for megasquirt and more information on a wide variety of setups. Both platforms utilise the same tuning software.  So keep a look out for megasquirt deals.

 

I can't comment on MS, since I've not used it, or the current state of Speeduino since it's been a few years for me, but having poked around in my blog posts from when I was playing with it, goddam it was good fun and really hit me in the nostalgia feels. I'll do it again at some point; I still have a spare Speeduino and most of the bits required to make something run on it, I just haven't had the right car.

I can concur with the above recommendation regarding the trigger wheel, batch injection and wasted spark. It's almost comical how easy it is to get that setup to work, and in my case, run and drive better than the old Lucas EFI right out of the box. I probably wouldn't bother building one like I did nowadays, not when it's so easy to get a nicely built off the shelf unit with a housing and everything; I think one was linked a couple of pages ago.

If you want to have a dig through what I did, its all here, https://tasteslikepetrol.net/category/projects/speeduino/page/2/  and https://tasteslikepetrol.net/category/projects/speeduino/

  • Like 1
Posted
On 19/10/2024 at 13:09, BlownCorona said:

Do you have an IACV? Might need to open that up a touch at cranking 

As in foot to floor as soon as it catches it will idles fine im not sure IAC will react fast enough also really scared of IAC tables it has more tables than the MAF.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...