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Author Topic: 30/32 DHTA Rebuild and jetting question  (Read 1245 times)
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aldad138
Alexander M K Kasner
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1979 Beta Coupe


« on: October 12, 2015, 06:12:50 PM »

Hello All- My 79 is closer to hitting the road.  I want to rebuild it and wonder if any of you have jetting ideas.  There are so many out there, and I could use advice on if there are optimal jetting sizes or to just go with the stock ones already in it???

IT is the 30/32 DHTA in my Coupe.

Alex
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1979 Lancia Beta Coupe
1994 Nissan Hardbody
2014 Mazda 3
Old Cars
1977 Alfa Romeo Alfetta
1990 Subaru Legacy
1979 Fiat Strada
1998 Volvo V70 GLT
HFStuart
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« Reply #1 on: October 12, 2015, 09:56:10 PM »

Unless you're planning to junk the emissions kit and bring it up to Euro spec I'd have to say go with the standard ones.

Oddly the Haynes manual doesn't list a DHTA fitted to any Betas - the US versions shows as 32 DATRA. That's not to say they weren't fitted though
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aldad138
Alexander M K Kasner
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1979 Beta Coupe


« Reply #2 on: October 12, 2015, 11:32:26 PM »

Emissions systems are pulled out, even before I got her.  Some of it piecemeal, but all in all the motor runs strong enough.  Not sure how close to Euro Spec I can get her, but that is my thoughts for now.  FI later on down the road.  I figured if we are going through the carb, might upgrade if it will be good for driveability.  I thought going a bit bigger, nothing drastic.

It is definitely the 30/32 DHTA, stamped on the carb.  I also thought it odd...not in the Haynes I have, at all.

Thanks...Alex
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1979 Lancia Beta Coupe
1994 Nissan Hardbody
2014 Mazda 3
Old Cars
1977 Alfa Romeo Alfetta
1990 Subaru Legacy
1979 Fiat Strada
1998 Volvo V70 GLT
HFStuart
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United Kingdom United Kingdom

Posts: 1576



« Reply #3 on: October 13, 2015, 09:11:51 AM »

Upgrading to a 34 DATR or DMTR might be worthwhile then.

It might be worth asking on the guy-croft forum about jetting  - they'll want to know all the details of the engine first though.

FI will make the pickup smoother and probably give you better mileage  - it won't always give more power.
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aldad138
Alexander M K Kasner
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United States United States

Posts: 51


1979 Beta Coupe


« Reply #4 on: October 26, 2015, 06:17:29 PM »

Thanks for the advice, Stuart!  So, we are having significant issues with the 30/32 DHTA and the accompanying fuel system.  I have a line on a 34 DAT (not DATR or DATRA) for a decent price to replace the old DHTA.  I am a bit behind the 8 ball on what the DAT/DATR/DATRA differences are to know if this is a good idea or not.  Any help? 

Alex
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1979 Lancia Beta Coupe
1994 Nissan Hardbody
2014 Mazda 3
Old Cars
1977 Alfa Romeo Alfetta
1990 Subaru Legacy
1979 Fiat Strada
1998 Volvo V70 GLT
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