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B16 -> B20 questions

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Old Feb 3, 2026 | 03:37 AM
  #1  
LittleHesus's Avatar
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Default B16 -> B20 questions

Hello guys , I have an ek (ej9) that was swapped at some point to a b16a2 , the whole harness was made to obd2b (it was sfi) , engine harness is obd2b and internal was modified to work with stock ecu p2t , then we used an obd2b-obd1 adapter to use a p30 ecu with cobraRTP , we also took a line directly from the distributor in order to have rpm gauge.
This works perfectly , but now I am in a bit of a pickle.
So my engine is in the machine shop for unknown timeline and because my car is on my mechanic , I was thinking of buying a b20 engine (block and head) with b20 intake and b20 exhaust manifold. but it has no throttle body and no distributor.
So my question is what would I need in order to make it happen and work for whatever time.

I have B16A2 intake manifolds , throttle bodies and b18c-r throttle body as well as a b16b intake manifold (pct)
Supersprint header 4-2-1 but not sure if it will fit b20 head. that's why the deal is with intake manifold and exhaust manifold.

In terms of the distributor could I use the obd2b
The distributor that I have is TD-81U
but I might have my old one from my EG but plugs different unless I buy an adaptor.

any input would be greatly appreciated.
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Old Feb 4, 2026 | 03:05 AM
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Chrisfrom1986's Avatar
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From: CA41N
Default Re: B16 -> B20 questions

Non vtec distributor only, obd1 or obd2 b18/b20.
B16/18 throttle body should fit.
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Old Feb 4, 2026 | 04:47 AM
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LittleHesus's Avatar
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Default Re: B16 -> B20 questions

Thank you for the reply , so I just need to find a distributor with the correct plug from a non vtec and we are fine , thank you so much!
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Old Feb 4, 2026 | 02:32 PM
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Chrisfrom1986's Avatar
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Default Re: B16 -> B20 questions

The plug doesn't matter much you can easily make an adaptor, it just must be non vtec to bolt to the b28/20 head.
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