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Anyone ever used an AHA throttle body?

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leebro61

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Discussion starter · #1 ·
Somebody once told me that the throttle body from an AHA engine code Audi (late 90s a4 6 cyl I believe) bolts right onto an obd2 vr6 manifold and plugs into the obd2 tps connector. He also said it was a straight through casting without the "ramps". I was looking for some info on the throttle body and wanted to know if anybody else had tried this.
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Discussion starter · #3 ·
Re: Anyone ever used an AHA throttle body? (veedubgolf00)

I run standalone on my car so idle and or bucking problems aren't an issue, was just looking for a free flowing "as cast" throttle body.
 
#4 ·
Re: Anyone ever used an AHA throttle body? (leebro61)

i don't know the engine code but 98 and 99 30v v6 motors were DBC still and have that throttle body. I can check and see if it bolts up, but the plug is the same.
 
Discussion starter · #6 ·
Re: Anyone ever used an AHA throttle body? (benzivr6)

A helpful vendor sent me these pictures of the AHA throttle body. You can see the same bolt pattern, throttle attachment and TPS plug. You can also see (or rather, can't see) the ramps
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Hopefully they don't mind me sharing these. I think I'm going to order one and try it out.
 
#7 ·
Re: Anyone ever used an AHA throttle body? (leebro61)

Is there a difference in size between the throttle plates? There are a few things to consider when swapping to a straight thru TB like this. You will gain more airflow at higher RPM's but low end torque will not be as good as part throttle drivability will not be as good either. Those ramps are known as velocity stabilizers. What you can do is port the very outer edges of the inlet on that AHA TB to create somewhat of a velocity stack to help aid in low end torque. Curious to see how this turns out. Keep us posted.
 
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Discussion starter · #8 ·
Re: Anyone ever used an AHA throttle body? (vdubxcrew)

I'm in the process of verifying the size of the throttle plate. I know obd2 vr6 is 68mm and obd1 vr6 is ~62mm (IIRC). I'm hoping the AHA is about the same as obd2 vr6.
As for driveability/performance concerns, this would be in a standalone, turbocharged application with a custom intake manifold. I've noticed in looking at turbocharged VAG applications that turbo throttle bodies are typically straight through with minimal if any ramps. I could speculate on why but that probably isn't necessary at this point
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#10 ·
Re: Anyone ever used an AHA throttle body? (veedubgolf00)

he does have a point. Since you are stand alone, you can get a 80-85mm mustang TB. Even larger yet.
 
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Discussion starter · #11 ·
Re: Anyone ever used an AHA throttle body? (veedubgolf00)

Quote, originally posted by veedubgolf00 »
why not just go with a mustang throttle body? i mean your already standalone or do you just like using oem parts?

This is a valid question. In my experience with stock and aftermarket mustang tbs, the quality has been relatively poor. Also, the mustang throttle bodies have been very large in comparison to an obd2 sized throttle and I have very limited space in which to put the throttle body. I already have a very nice, o-ringed obd2 vr6 flange to weld onto my intake manifold. If I went to a mustang throttle, I would also have to tweak the throttle cable attachment point and block off miscellaneous ports on the mustang tb.
 
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leebro61
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