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Join Date: Jul 2005
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Smile

Another idea I have if this kit will work with my 2.4 core is to block the injector holes in my head and fit the intake manifold off a 3.2 motronic onto my block if this will fit then use this kit with the motronic injection manifold. Mainly cos my local breaker has one for sale including throttle body!

This raises a few morequestions, will a 3.2 manifold fit a 2.4 engine are all the intake studs the same space apart?

Secondly will this kit fit the 3.2 intake?

Steve
Old 07-30-2005, 07:35 AM
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Quote:
Originally posted by 1972_911T
[B]....Any one got any dimensions of the EFI injectors like the diameter of the part that seals into the hole?
The O-ring on the injectors is 14mm, so your hole must be a little less to compress the o-ring.

Cheers,
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Tony
'78 911SC with BITZRACING EFI conversion kit
Old 07-30-2005, 08:46 AM
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Quote:
Originally posted by 1972_911T
...Secondly will this kit fit the 3.2 intake?

Steve
Not sure what you mean by "fit the 3.2 intake"?
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Tony
'78 911SC with BITZRACING EFI conversion kit
Old 07-30-2005, 08:48 AM
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the carrera intake. 84-89 911's

You might not have heard of them. They aren't as popular as the SC's.
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1980 911SC Targa - Sold
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Old 07-30-2005, 08:51 AM
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I mean the intake of the 3.2 motronic injection engine! I know a breaker with one of these for sale I would presume the injectors would be a direct fit into this manifold providing the space between is the same!

My MFI is driving me mad I need a solution soon!
Old 07-30-2005, 09:05 AM
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This manifold

Old 07-30-2005, 09:10 AM
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Also would this inatke manifold mount to my engine? Im not sure if the later aluminium cases had different stud patterns for the intake????

Thanks Steve
Old 07-30-2005, 09:16 AM
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I know what a 3.2 manifold is, just didn't understand your question.

One person has used a 3.2 manifold in a SC EFI conversion. It's very cost prohibitive if you want to buy a used set, I would think.

Cheers.
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'78 911SC with BITZRACING EFI conversion kit
Old 07-30-2005, 09:18 AM
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Ok scrap the 3.2 manifold idea ive just had a good look at some closeup pics of this manifold and it seems like id would need to machine my heads as the injectors would be firing into the gasket between the head and the manifold the 3.2 heads must have some sort of cut out in them for the injectors to fire into the intake port!



Anyone know of a throttle body manufacturer that dosent cost the earth?

Steve
Old 07-31-2005, 12:00 PM
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I'm curious for those who have done it...

1. Does the tbitz kit truly include EVERYTHING -- including a pre-cut air box? I bought an SC last year that seems to have a cold start problem that my local Porsche mechanic hasn't been able to solve. In any event, my concern is that (a) airboxes are expensive to buy, and (b) resale MIGHT suffer if the car is not "original" (though likely only if I am selling to another Porsche newby who knows enough to know the car isn't stock).

2. In the photos it looks like it uses the stock air intake runners -- true?

3. What of the CSI system HAS to remain?

4. Can the entire project be done with the motor in the car?

5. Will it pass SMOG? I have seen several posts about CARB, but no one has yet confirmed if it will pass. I'm in Phoenix, Arizona, which seems to have even stricter policy than CA (I used to live in CA)...at least in terms of the cut off year for testing.

6. Does the system work with the CAT converter in place?

7. Does it use the O2 sensor?

8. How much cutting and modification is required?

9. Has anyone done accurate testing of HP and fuel economy? Small gains in HP would be fine, but since I use my car on the street regularly, I would not want to see significant drop in fuel economy. If it were only a track car, I might feel differently.

I'm not that scared about the price, particularly if it makes the car run smoother and more reliably (mine is a daily driver right now). The listed price seems pretty reasonable, especially if you consider the $$$ spent while the mechanic who is more used to working on 993 and newer cars struggles with the antiquated CIS system. Funny thing, I've had CIS in VWs and never really had problems.
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Old 07-31-2005, 02:31 PM
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DJC911,

Here answers to your questions:

1) Yes it includes everything IF you keep the CIS look of the engine bay. Most people don't, they cut up their own air box and remove anything that is not essential. If you go that route you need to get a couple of things. Below is a pic of the CIS look and the cut up air box look.





2) Yes

3) You keep the AAR, fuel pump, fuel filter, Accumulator. Other stuff isn't needed, but remains to keep the CIS look. Look at the pics and Installation Guide for details.

4) Yes. Best to remove the intake though.

5) I have no data to answer this.

6) Yes

7) Yes the kit comes with a heated O2 sensor.

8) A bit is required. Read the Installation Guide for details.

9) I've done a "after" dyno run and show significant increase in Hp.

Cheers,
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'78 911SC with BITZRACING EFI conversion kit
Old 07-31-2005, 03:03 PM
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Cool

DJC911,

I've been running Tony's kit for about a year and a half. Did it with the engine in the car and left the airbox stock. I still have the original heater hose setup and fan. Unless you're very familiar with a CIS car, you'd never notice its been converted to EFI.

The car is a stock 82SC that's my daily driver. I've probably put around 30,000 miles on the car since the conversion. I have had no problems since the conversion.

Before the conversion I averaged about 22 mpg, after the conversion the mileage has gone up to around 25 mpg.

About 6 months ago I installed a wideband O2 sensor in place of the narrowband sensor that Tony supplies with the kit. The model I chose provides a realtime display of the current AFR and gives you a more complete picture of exactly where the AFR is when datalogging.

I'd recommend Tony's kit to anyone.

-Mac
Old 07-31-2005, 05:53 PM
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If it looks stock, it will almost certainly pass the visual inspection in CA. The ECU can be programmed to pass the sniffer test, especially if you program the ECU for an emissions specific tune and have the cat intact. Megasquirt is that flexible.

If you get an astute Porschephile doing the inspection he might notice, but the average knuckleheads doing CARB testing won't. They are usually looking for carbs or other oddities which are easy to spot.

This thread talks about some of it, but you can search the Megasquirt forum for more experiences:
http://www.msefi.com/viewtopic.php?t=9372&highlight=smog+california&sid=94db179cecd02887c280e17aff698c92
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Last edited by kenikh; 07-31-2005 at 06:30 PM..
Old 07-31-2005, 06:26 PM
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Here is a picture of my EFI conversion using tony's kit. I made my own airbox. it is a 76' 2.7 Turbo(BAE) with full MSD
Old 07-31-2005, 07:41 PM
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where did you guys get the air fikter assemblys?? I am going to make an airbox but need some more info
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Custom Welding repair/ Fab service, SS, 4130, TI, Brass, Mag 90 964 (sold)77 911 Turbo conv (sold) 75 914-6 conv (sold) 74 911 Targa (sold) 70 914-4 (sold)
Old 08-01-2005, 05:06 AM
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Ben,

The rubber boot can be purchased here:
http://shop.airflowonline.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=AFSI&Product_Code=90CB30&Category_Code=CE2

Air filter can be purchased at any performance auto shop.

Cheers,
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Tony
'78 911SC with BITZRACING EFI conversion kit
Old 08-01-2005, 06:48 AM
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thanks I will check it out
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Custom Welding repair/ Fab service, SS, 4130, TI, Brass, Mag 90 964 (sold)77 911 Turbo conv (sold) 75 914-6 conv (sold) 74 911 Targa (sold) 70 914-4 (sold)
Old 08-01-2005, 07:37 AM
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Quote:
Originally posted by kenikh
If it looks stock, it will almost certainly pass the visual inspection in CA....
What do the 911 savy folks on the board think this is? CIS or EFI?

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Tony
'78 911SC with BITZRACING EFI conversion kit
Old 08-01-2005, 12:12 PM
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I spy a fuel rail...barely. That'll pass smog, for sure.
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- 1966 911
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Old 08-01-2005, 12:23 PM
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VERY nice BB fan blade painted to match the shroud nice detail ... I was looking and thinking hhhhmmmm why is his air breather way down there ooohhh wait its a turbo ... have you done any dyno work with that setup cause that is excatly what I want to put togehter..... also can you give more specs on the engine....
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Old 08-01-2005, 12:47 PM
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Old 08-01-2005, 12:47 PM
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