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choco
500RPM



Joined: 11 Jun 2021
Posts: 590
Location: Queanbeyan, NSW (on the ACT border)

Posted: Wed Feb 11, 2021 7:40 am    Post subject:

bcal wrote:
Is the 360 on squirt or GM delco?


Kalmaker Street Pro 3. although I will probably burn an EPROM and run a hotted up Delco so I can use my Kalmaker to tune other computers. I have T Bucket with VN V6 to do this weekend.
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Frank Choco Munday, Technical Author
Hot Rod Handbooks
Phone: 0412 883 235 or (02) 6255 9810
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bcal
Cruisin



Joined: 04 Feb 2021
Posts: 372
Location: The Shire, Sydney

Posted: Wed Feb 11, 2021 3:36 pm    Post subject:

Choco doesn't the Kalmaker setup work out rather expensive?
When I inquired about it here in Sydney the guy told me to basically forget it if I was after a budget setup that I could tune myself.

In fairness tho I guess that if I had a more convensional engine (ie SBC) then there would be plenty of programs around to at least get it running.

I've been able to get mine to run nicely on speed density even tho the vacuum levels are fairly low. (Like less then 90 kPa Absol)
Have gone to closed loop with the oxygen sensor tho.
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choco
500RPM



Joined: 11 Jun 2021
Posts: 590
Location: Queanbeyan, NSW (on the ACT border)

Posted: Thu Feb 12, 2021 7:50 am    Post subject:

Kalmaker is sold in a couple of variations, depending on the user's role in the automotive industry. The version I have is Street Pro 3. This is a Delco computer that has had the Memcal replaced with a Real Time Unit (RTU). All this does is replace the EPROM with a SRAM, so that you can load as many different calibrations as you like without plugging in a new EPROM every time. A serial cable is also fitted which allows you to save the calibrations to a laptop. You tune your engine with with the laptop running Kalmaker software, making adjustments to around 300 maps as you go.
The Street Pro 3 costs about $1100, considerably less than a Motec or Halltech, or Electromotive or Hawk, etc etc and has over 300 maps as opposed to 20. You get total control over every aspect of engine operation.
Most people, however, only want their computer tuned to their engine without the expense of buying Kalmaker. A Delco computer from a Camira, Commodore, etc costs anything from $10 to $100, depending on where you get them. They are cheap at swap meets. Wrecking yards tend to think they are pricey, but I bought 20 computers for $40 each.
Anyway, if you want your factory Delco tuned, you grab someone with Kalmaker, tune the engine, save the configuration to the laptop and burn an EPROM. The EPROM is soldered in to the factory Delco computer's MEMCAL (a plug in unit that stores the factory program on a PROM). The guy plugs his computer back in, and that's it. Total cost is $40 for a computer, and whatever the Kalmaker guy charges. This will include a PAL chip, which is a copy protection device that must be built in. You can buy these from Kalmaker (Alan Gibbs) for about $300.
A lot of people are simply paying $1100 for street Pro 3 and leaving the real time computer in their car. It still works out cheaper than a programmable EMS. In addition, a Delco computer has far more scope than an aftermarket programmable EMS. You can run blowers, big cams, nitrous, knock sensor, electronic transmissions, high compression, stack injection conversions, etc etc. They run on TPS mode at idle and MAP mode off idle (for big cams or stack injections that have little or no vacuum at idle), closed loop idle, VSS control (using a Vehicle Speed Sensor smooths out operation of a hot engine quite nicely, so I'm told), and the list goes on.
I'm in the process of re-writing the Kalmaker User's Guide and there's just so much that I didn't know about these things. The bottom line is that a an engine management system is as good as the software that drives it. Kalmaker and the factory Delco software is a perfect combination, and the second cheapest option for hot rodding EFI that I know about (Megasquirt is the cheapest).
Take a look at the Kalmaker forum:
http://kalmaker.hotrodhandbooks.com.au
_________________
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Frank Choco Munday, Technical Author
Hot Rod Handbooks
Phone: 0412 883 235 or (02) 6255 9810
Carburettors SUCK!
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bcal
Cruisin



Joined: 04 Feb 2021
Posts: 372
Location: The Shire, Sydney

Posted: Fri Feb 13, 2021 10:53 am    Post subject:

Thanks for that info mate.
I basically got the gist when I talked to a kalmaker agent here in Sydney but when he found out what my budget was the conversation abruptly ended.

For my purposes I think the squirt is fine as I only ever wanted to replace carbs.
The ECU cost me around $200 to build and the whole conversion ended up costing me around $800. That compares favourably with what twin 45 webers would have cost me and the EFI system is far better IMO.

What I like about the squirt is that a mug like me can tune the thing at home. An example was when my engine would bog down off idle. With the 3D tuning map I could easily trace the exact points that I needed to enrich to give me smooth progression. Took me a couple of minutes. With carbs I would have been friggin around with different sized jets for hours.

The only concern I have is with the squirts reliability. After all I know the limitations of the mug who built it!!!
Still they’re cheap enough to carry a spare in the boot.

If you want to learn about the mysteries of EFI then I think the squirt is a good way to start. Certainly taught me a lot.
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bcal
Cruisin



Joined: 04 Feb 2021
Posts: 372
Location: The Shire, Sydney

Posted: Wed Feb 18, 2021 6:32 pm    Post subject:

Update.

After 1 1/2 tanks of fuel I've got her running on closed loop at stoichiometric mixtures (14.7:1)
Didn't think this would be possible on such a dirty old engine
Won't idle at stoichiometric tho, but who cares.
Very smooth and very quick across the range now.
All I have left to tune out is a slight flutter under medium acceleration.
Boy I need to get a laptop
I must be drivin the nieghbours with my comings and goings
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nuckles
Rookie


Joined: 02 Jul 2021
Posts: 20
Location: townsville

Posted: Thu Feb 26, 2021 9:39 pm    Post subject: gsxr 600

have been reading posts and keeping up with what is going on,I have been offered a setup from a 600 gsxr 01 model and woundered if it would work as a custom setup on a red holden 6?
do you think it would be big enought for it?
have to make a manfold but lets have some fun.
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bcal
Cruisin



Joined: 04 Feb 2021
Posts: 372
Location: The Shire, Sydney

Posted: Fri Feb 27, 2021 4:28 pm    Post subject:

Nuckles,
These will most probably be the Keihin throttle bodies and injectors.

Have a look at the injector angle. Not ideal IMO. Apparently they use pintle type injectors that squirt on the back of the throttle plate. The second butterfly is used to help the gsxr with throttle control at low RPMs and is not needed on a car.
Mine are mikuni with denso injectors. The throttle plate is 46mm and the outlet tapers down to 40mm, which was ideal for my purposes.
Mine came off a 750 so I'm not sure what size yours would be. I'm pretty sure that the injectors will be too small as the 750 had 18lb injectors.
You'll probably need around 25lb for the holden. I know that the 1300 busa has 32lb injectors and the throttle plate is way over 50mm.

Are you going to use just the 4 TBs or are you going to get another 2.
I ask because 6 would be ok for individual TBs but 4 would be way oversized if on a common plenum.
Also, if you do use a common plenum (with probably just 2 TBs)you'll have to mount the 6 injectors in the runners.

Really individual TBs are the way to go and if I was doing a red six I would be looking for a VK EFI head because they have the injector bungs built in. I'd also grab a triple weber style manifold and look around for a set of 40mm webers, dells or solex carbs. I'd gut the carbs and use them as TBs. The best ones to get are the old solex PPH from early alfas (the 2600s had triples). When you gut these out you end up with a 48mm bore which steps down to 40mm at the plate. You can then machine up a tapered insert and with 48mm air horns you've got a great set of ram tubes. Another good thing is that they were a totally useless carb and most alfa owners would be only too happy to part with them. Also unlike the dells and webers each throttle plate can adjusted individually.



Good luck.
And as you said. Have some fun
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