3B vs. AAN into urq.

Afterthought · Post by **Afterthought** » Mon Aug 24, 2015 2:51 pm

hey guys starting a new project, by far the coolest of any I've done.
Going to be doing a 20v swap into an 83 UR Quattro.

The car is going to be on it's way to me in a week or so, so yes I'm jumping the gun but I can't stop obsessing about it.
P.O. did a swap from '83 to '84 fusebox and was not able to get the car to start anymore. At this point he stopped troubleshooting the C.I.S. because he was going to swap to a 3B anyways. My plan is to see if i can trace the wiring bug and get it running with the CIS, if not the swap starts sooner than planned.

So mapping out my build I have a few goals drivetrain wise.
1) 350-400 HP wheel
2) Beefed up trans, 6 Spd 01E?
3) Custom intake manifold or 3B style to facilitate the maximum cooling possible out of the side mount rad. This is due to my issues I was having with my 90 Coupe.
4) Custom engine harness, VEMS ECU

I have a spare AAN engine in my shop that needs rebuilt. I also have a 3B coming with the car that is in the same condition. both are longblocks.

Considering I want to be able to fit the biggest radiator I can over there, this tells me I either want a 3B intake or custom single or dual plenum with the forward facing inlet. So, the 3B is probably the easiest swap, but I could consider doing the 3B block, or aan block with the AAN head on it as well. I think either block is perfectly fine with the power goals I have. IIRC the AAN without the distributor would be a better set-up, This project will call for a custom engine harness and VEMS tuning so while I have the chance I want to ditch the distributor, right?

What I'm looking to do is figure out which engine block and head to start working towards rebuilding and wanted to see if anyone has any input.

varia · Post by **varia** » Mon Aug 24, 2015 2:59 pm

block: you want serpentine belt or v-belt?
3b water manifold is needed, either way.
head: pick by the condition, cps is easy, i made a template:

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Afterthought · Post by **Afterthought** » Mon Aug 24, 2015 3:09 pm

varia wrote:block: you want serpentine belt or v-belt?
3b water manifold is needed, either way.
head: pick by the condition, cps is easy, i made a template:

Thanks for the reply buddy!
I'm pretty sure V-belt, but I guess I need to give that some consideration. I don't have any of the parts or brackets for the AAN serp. belt set-up and the P/S pump being mounted up there in the front will not fit with the 3B water manifold. Also, It will limit my manifold choices If I try to do front exit. With my power goals I don't think that a bigger intake manifold is necessary, but not sure.

varia · Post by **varia** » Mon Aug 24, 2015 3:45 pm

i would go 7a ps bracket, B4 90/cabriolet pump, forward facing intake manifold
its been done many times, nothing to invent.

alxdgr8 · Post by **alxdgr8** » Mon Aug 24, 2015 5:51 pm

Woot, glad it worked out for you! Can't wait to see this.

Afterthought · Post by **Afterthought** » Mon Aug 24, 2015 6:07 pm

alxdgr8 wrote:Woot, glad it worked out for you! Can't wait to see this.

Me too buddy thanks. I'm super excited. Have a good buddy down in Austin about 5 miles away that is going to load everything up for me this Thursday and it will be heading out.

3B vs. AAN into urq.

3B vs. AAN into urq.

Re: 3B vs. AAN into urq.

Re: 3B vs. AAN into urq.

Re: 3B vs. AAN into urq.

Re: 3B vs. AAN into urq.

Re: 3B vs. AAN into urq.