Harely carbs on a 3rd gen

mokerconer said:

I'm looking for someone to sell me preground cams and cam gears for an a3
I'm going to get a custom intake made to fit 45 Harley carbs on it and I'd like to get the most out of it for very little obviously not trying to break records or anything just looking for parts and some advice on this conversion if anyone has any tips on how to run these properly much appreciated

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You're not gonna find those anywhere. I'm not sure if you know this, but given the fact you used plural forms of cam and cam gear I'm assuming you don't...the b20a3 is a single overhead cam engine, not double overhead cam like the b20a5 and b21a1. You would be better off sourcing the parts to swap to fuel injection if you want to improve the performance of your 3rd gen. Even if you could somehow find those parts, there's not much gain to be had with the carbie lude engine. The internals are fairly weak in that engine.

I did recently upgrade my carbs to dual webers on my 2nd gen prelude. I wrote a guide on it if you want an idea of what the task involves. As for the cams, if the engine works, don't fuck with it.

luzer said:

You're not gonna find those anywhere. I'm not sure if you know this, but given the fact you used plural forms of cam and cam gear I'm assuming you don't...the b20a3 is a single overhead cam engine, not double overhead cam like the b20a5 and b21a1. You would be better off sourcing the parts to swap to fuel injection if you want to improve the performance of your 3rd gen. Even if you could somehow find those parts, there's not much gain to be had with the carbie lude engine. The internals are fairly weak in that engine.

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I'm aware it's sohc I'm just wondering if anyone has a set of pre ground cams or adjustable cam gears not just gonna say preground cam and cam gear doesn't feel natural when writing mainly just looking to take advantage of the mod of putting on it like I said not really looking for crazy performance and I'm sticking with carb till an engine swap I'll be keeping my a3 on an engine stand fully working once I swap

Stub said:

I did recently upgrade my carbs to dual webers on my 2nd gen prelude. I wrote a guide on it if you want an idea of what the task involves. As for the cams, if the engine works, don't fuck with it.

How to replace Keihin carburetors with Weber carburetors...

Introduction: The 1983-1987 Prelude is equipped with Keihin 3BBL dual carburetors, a CVCC-II system for controlling emissions, and an ET2 engine. The carburetors are old, difficult, and expensive to maintain. If something goes wrong with the CVCC system, it can adversely effect the performance...

www.preludepower.com

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Much appreciated advice I thought about webers but they're expensive as hell and still don't fit without a custom Intake or an a5 intake I think which I have neither of and if I'm going custom intake route im going with something no ones done before plus if I have to send my head in already I was just thinking why not get the cam and cam gear for a little added boost and reliably but if your saying don't fuck with it I probably won't if I can't find what I need to run heavily tuned 45s properly don't want it to fuck something up I'll just run them on what stock can handle and have it be a nice daily driver till the swap

Any problems I would run into with the ecu ik I'll have to bypass a lot but for the most part the carb isn't computerized so I should be able to run the new 45s without much hassle right?

mokerconer said:

Any problems I would run into with the ecu ik I'll have to bypass a lot but for the most part the carb isn't computerized so I should be able to run the new 45s without much hassle right?

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It acutally is electronic.

1funryd said:

It acutally is electronic.

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^^This. It's got an ECU so it is computer controlled. Some might even consider it more complex than it's fuel injected siblings. It's definitely more challenging to troubleshoot. Soooo many vacuum lines.

1funryd said:

It acutally is electronic.

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No major components that I can't just trick the ecu into replicating right? Cause from all the diagrams I've studied and looked over don't really show any major electrical components that a newer carb would have. My question is what would be the best way into deleting all the inevitable gremlins I know its possible and I will make it work when the time comes I just like to have a game plan instead of trouble shooting error after error walking in circles when it's just a sensitive vacuum line or a solenoid

To me, it looks like most of what the ECU does is for emissions, but I do see the AC compressor clutch switch is wired through the ECU so it looks like you'd have to rewire that.

luzer said:

^^This. It's got an ECU so it is computer controlled. Some might even consider it more complex than it's fuel injected siblings. It's definitely more challenging to troubleshoot. Soooo many vacuum lines.

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Yup...

Stub said:

To me, it looks like most of what the ECU does is for emissions, but I do see the AC compressor clutch switch is wired through the ECU so it looks like you'd have to rewire that.

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Not bad I'm sure someone else has done it with other side draft carbs good to know I see it on the diagrams actually

mokerconer said:

Not bad I'm sure someone else has done it with other side draft carbs good to know I see it on the diagrams actually

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@funkytuqe did it with his Funkylude