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chris79
Joined: 29 Jan 2014
Posts: 551
Location: milan
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 Posted: Fri Apr 24, 2015 11:44 pm Post subject: carbs or turbo + efi |
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I would like know which conversion you think is better, weber carbs conversion or efi + turbo. This work is possible for humans that don't have as username raceboy, ecc ? 
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Porsche 924 2.0 na 125hp (1979) euro
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Alfa Romeo Spider "Duetto" 1.6 104hp (1986) euro |
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nickthompson
Joined: 26 Mar 2013
Posts: 873
Location: Central Georgia
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| Posted: Sat Apr 25, 2015 6:20 am Post subject: |
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| Better or easier/cheaper? I had duel DCOE 40s on my 77 and I loved them. The car started every time without fuss and it made a wicked sound. EFI is far superior to carbs any day of the week. Turbo plus efi will produce much greater horsepower. |
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chris79
Joined: 29 Jan 2014
Posts: 551
Location: milan
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| Posted: Sat Apr 25, 2015 7:02 am Post subject: |
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My dream is turbo on my na, but I don't know if I can made this work myself.
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Porsche 924 2.0 na 125hp (1979) euro
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Alfa Romeo Spider "Duetto" 1.6 104hp (1986) euro |
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Grenadiers
Joined: 20 Feb 2007
Posts: 3222
Location: Nelson, WI & Prescott, AZ
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| Posted: Sat Apr 25, 2015 7:14 am Post subject: |
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If you can speak in algorithms, then EFI can be quite fun. However, us lesser humans who can't, have a hard time tuning this system. Myself included~! But, the IDEA of EFI, coupled with EDIS from a Ford car, simplifies the engine compartment, and once tuned, really works well. I'm not quite there yet.
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'83 944 Track car.
'88 924S Track car.
'89 944 Turbo
2004 Winnebago Vectra monster RV
2012 Jeep Wrangler
2014 Kia Soul
2001 Ford F350 powerstroke |
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chris79
Joined: 29 Jan 2014
Posts: 551
Location: milan
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| Posted: Sat Apr 25, 2015 7:36 am Post subject: |
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It's a good idea if advanced user of forum can made a guide step to step for convert na k-jetronic to efi and another guide for install and configure turbo.
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Porsche 924 2.0 na 125hp (1979) euro
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Alfa Romeo Spider "Duetto" 1.6 104hp (1986) euro |
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fiat22turbo
Joined: 18 Jan 2006
Posts: 4040
Location: Portland, OR
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| Posted: Sat Apr 25, 2015 7:57 am Post subject: |
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| chris79 wrote: | | It's a good idea if advanced user of forum can made a guide step to step for convert na k-jetronic to efi and another guide for install and configure turbo. |
Its been done. Check in the How-To section.
Basically its called following the MegaSquirt manual.
Read it here:
http://www.megamanual.com/MSFAQ.htm
Go and buy the necessary parts (MegaSquirt EFI box, wiring, sensors, connectors, fuel pump, fuel regulator) and install them.
You'll need to fabricate or find a fuel rail to hold the injectors along with injector inserts for the cylinder head (034motorsports has ready made inserts for Audi motors, but they aren't cheap).
A Throttle Position Sensor will have to be added to the throttle body or a replacement throttle body with a Throttle Position Sensor already added will be needed. Some later Audi and VW vehicles did have these.
Follow the manual to configure the startup settings and then adjust them until the car starts reliably and then you can tune the tables on the move with a laptop connected to the MegaSquirt using TunerStudio.
http://tunerstudio.com/index.php/tuner-studio
I did the conversion on my 924 and it wasn't hard other than getting it started the first time, but I caution you to start with a well running engine and to not make too many changes at once, so start with managing either fuel or ignition via MegaSquirt, not both until you're ready. I made too many changes at once on my car (Integral Cam, multiple throttle bodies, distributorless ignition) and it made it really difficult to tune.
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose) |
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chris79
Joined: 29 Jan 2014
Posts: 551
Location: milan
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| Posted: Sat Apr 25, 2015 8:02 am Post subject: |
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Very interesting! And for second step, turbo conversion?
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Porsche 924 2.0 na 125hp (1979) euro
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Alfa Romeo Spider "Duetto" 1.6 104hp (1986) euro |
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fiat22turbo
Joined: 18 Jan 2006
Posts: 4040
Location: Portland, OR
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| Posted: Sat Apr 25, 2015 8:16 am Post subject: |
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| chris79 wrote: | | Very interesting! And for second step, turbo conversion? |
BAE Turbo kit.
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose) |
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chris79
Joined: 29 Jan 2014
Posts: 551
Location: milan
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| Posted: Sat Apr 25, 2015 8:36 am Post subject: |
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I'm reading thread in performance upgrade, conversion to turbo with CIS.
If this project start I think to take this route.
But guide for install BAE turbo kit ?
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Porsche 924 2.0 na 125hp (1979) euro
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Alfa Romeo Spider "Duetto" 1.6 104hp (1986) euro |
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fiat22turbo
Joined: 18 Jan 2006
Posts: 4040
Location: Portland, OR
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| Posted: Sat Apr 25, 2015 8:40 am Post subject: |
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If you can find a kit, the install guide is posted here someplace.
They are very rare, but searching you might find one or most of the parts for one.
Note: it is intended for use with CIS, so some adaptation would be needed to fit it to a car converted to EFI.
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose) |
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chris79
Joined: 29 Jan 2014
Posts: 551
Location: milan
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| Posted: Sat Apr 25, 2015 11:20 pm Post subject: |
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But installing turbo kit on engine 35 year old and not restored it's not dangerous? Isn't possible that at first open of turbo the engine breaks?
I have to reduce first the cr?
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Porsche 924 2.0 na 125hp (1979) euro
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Alfa Romeo Spider "Duetto" 1.6 104hp (1986) euro |
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Sun Apr 26, 2015 12:15 am Post subject: |
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NOTE:
Engine Run Bad thread had 96 replies. . .picturing the Turbo Convert thread being a record setter!
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Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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Fasteddie313
Joined: 29 Sep 2013
Posts: 2595
Location: MI
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| Posted: Sun Apr 26, 2015 2:59 am Post subject: |
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Forget all that, turbo+EFI would be a massive undertaking, and especially megasquirt is going to take a whole lot of "know how".
NITROUS OXIDE
http://www.nitrous.info/
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80 Turbo - Slightly Modified |
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fiat22turbo
Joined: 18 Jan 2006
Posts: 4040
Location: Portland, OR
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| Posted: Sun Apr 26, 2015 4:40 am Post subject: |
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| chris79 wrote: | But installing turbo kit on engine 35 year old and not restored it's not dangerous? Isn't possible that at first open of turbo the engine breaks?
I have to reduce first the cr? |
If you mess up your tuning with the EFI and the amount of boost you run That said, I'd rather blow up an old worn out motor tuning things than a newly built motor.
Do you know the engine code of your motor? It's stamped on the engine block and that will tell you how much CR you have. A thicker head gasket can reduce your CR if desired. Cometic can make you a thicker head gasket. With proper fueling and low boost levels you can still run a turbo on higher CR and it will be more responsive at lower speeds.
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose) |
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Raize
Joined: 18 Sep 2013
Posts: 452
Location: Scotland
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| Posted: Sun Apr 26, 2015 5:37 am Post subject: |
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| fiat22turbo wrote: |
If you mess up your tuning with the EFI and the amount of boost you run That said, I'd rather blow up an old worn out motor tuning things than a newly built motor.
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Yeah, you can get 924 engines for free here. Might as well blow a few up. |
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924 FAQ (Technical)
