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Swapping Audi V8 into my A4


slowyota

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Hey guys, ive been wanting to do something different with my 1.8t A4 quattro since the stock motor is weak sauce. i know i could do a larger turbo, but that sounds dull, i could do a twin turbo S4 V6 motor swap, but i could just buy an S4 and call it done, so i came to the conclusion, V8 swap it!!

 

So basically, heres my A4, its of the 2001 vintage

 

http://i157.photobucket.com/albums/t65/jack_weisenburger_2006/2012-08-04150206.jpg

 

the v8 is coming courtesy of a 2000 A6 4.2 V8 that i picked up off craigslist for a steal, with a bad auto tranny

 

http://i157.photobucket.com/albums/t65/jack_weisenburger_2006/20131115_123633_zps8caea80f.jpg

 

http://i157.photobucket.com/albums/t65/jack_weisenburger_2006/20131116_153509_zps4084f061.jpg

 

 

so, first things first, i cut off the exhaust on the A6 right after the X pipe, so i could hear the bad ass symphony that motor creates

 

a nice video of it.

 

 

http://i157.photobucket.com/albums/t65/jack_weisenburger_2006/th_20131116_162309_zps5a9fc527.jpg

 

 

 

So basically, to make this swap work, i will need a clutch/flywheel setup from a Audi v6, so i can retain my A4's 5 speed manual, i will need to repin a few wires, i will be keeping A/C, P/S and cruise, all of which to transfer over, and have the ecu flashed so its not looking for an auto trans when it will have a manual behind it.

 

 

i know it will not be fast, but i will be going from the 1.8t (170 hp) to a 4.2 v8 (310 hp) so it will be fun, especially with awd and a manual. i want to do this because the A4 never came with a V8 and i will be using almost all factory Audi parts to make this work, which i think is kinda cool.

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how long is your trans going to last with a 140hp increase?

 

i am going to rebuild with carbon syncros, but the 01A 5 speed, has been proven reliable at 500 whp, so making 310 crank i am not worried, and if i do break it, i have a spare and they r cheap also

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i am going to rebuild with carbon syncros, but the 01A 5 speed, has been proven reliable at 500 whp, so making 310 crank i am not worried, and if i do break it, i have a spare and they r cheap also

 

Sounds good. If you need anyone to stand around and drink beer while you swap it let me know.

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i am going to rebuild with carbon syncros, but the 01A 5 speed, has been proven reliable at 500 whp, so making 310 crank i am not worried, and if i do break it, i have a spare and they r cheap also

 

The gearing is going to be pretty short for that motor, will be cranking on the highway

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Why not a 01E trans, $$$$? Just curious, it was what came to mind before you even stated which trans you were going to use but I don't know any of the technical details. I assume it would bolt up, was probably the manual option in v8 4-chassis sized cars (b6&b7)?

 

Looks like a cool swap, good luck!

How do those motors take to boost? Maybe an option down the road if you get bored with the power.

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This. I've seen them go for dirt cheap. Then you can also add the Euro TDI 6th gear to that.

 

to make a 01E work, i would need to by rear diff, driveshaft, the trans itself, linkage, front axles, mounts, and a few other items, so $$$$

 

But the biggest reason is that i would need to run the spacer, and i will lose almost 12mm of space up front, which doesnt sound like a lot, but its the difference of being able to fit a fan between the radiator and motor and not being able to.

 

Also, the 01A has been proven reliable to 500 awhp and they are plentiful and cheap.

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I'd have done a VR6 + turbo myself. Anyway should be a cool project when done.

 

ive considered it, the VR6 sounds very nasty and can make gobs of power, but the purchase price for all the components would literally be in the 10k range, after turbo bits...

 

and im not going for all out power, obviously its an Audi, just want nice torque and bad ass v8 sound, a fun daily

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Looks like a cool swap, good luck!

How do those motors take to boost? Maybe an option down the road if you get bored with the power.

 

thanks man!

 

Ive only read of a few people going turbo, and biggest problem is tuning, not many companies offer anything for the V8, and with aluminum block and steel liners people at varying power levels have cracked them, which i contribute to inadequate tuning. But some who have dumped tons of money in them have made great power, they are all forged internals.

 

There are supercharger options, but at about $6k, i will stay all motor for now. maybe a 75 shot if i get bored haha

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I ignored this thread a few times under "new posts" because I assumed it was some kid asking stupid questions about a V8 swap, lol. Clearly you've done your research and have a good plan. The car looks boss as is, the V8 sound and power will be awesome. I like that you're keeping it simple for the most part, I think it'll make for a well rounded car in the end. An sexy AWD sedan with a V8 and a manual, what's not to love?
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to make a 01E work, i would need to by rear diff, driveshaft, the trans itself, linkage, front axles, mounts, and a few other items, so $$$$

 

But the biggest reason is that i would need to run the spacer, and i will lose almost 12mm of space up front, which doesnt sound like a lot, but its the difference of being able to fit a fan between the radiator and motor and not being able to.

 

Also, the 01A has been proven reliable to 500 awhp and they are plentiful and cheap.

 

I see why you're sticking with the A.

 

Yeah you don't want the engine being any further forward than what it already is.

 

Good luck

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  • 4 weeks later...

little update, I removed the motor and trans from the A6, took about 3 hours, which i didnt think was to bad for my first time. Also that motor and auto trans combo is crazy long. haha i sepaerated the motor/trans, and got the motor on a engine stand, cleaned it up and started disassembly.

 

removed harness and coolant hoses, intake manifold, and of course both flaps are stuck, i did a leak down test and only got 1% leakage so i am super happy with the motors health. unfortunately both cam chain tensioners are shot, so gonna have to drop money in new ones... i pulled the pan, nice and clean, other than chunks of plastic for tensioner pads that made it to the bottom. i then removed the heads so i can port them and replace valve guides and nice fresh valve job.

 

and some pics:

 

http://i157.photobucket.com/albums/t65/jack_weisenburger_2006/20131205_185345_zpsa897867b.jpg

 

http://i157.photobucket.com/albums/t65/jack_weisenburger_2006/20131205_211445_zpsb3e1e7d8.jpg

 

http://i157.photobucket.com/albums/t65/jack_weisenburger_2006/20131205_223222_zpsce08782c.jpg

 

http://i157.photobucket.com/albums/t65/jack_weisenburger_2006/20131209_195455_zps3727d2e0.jpg

 

http://i157.photobucket.com/albums/t65/jack_weisenburger_2006/20131209_195534_zps309f8872.jpg

 

http://i157.photobucket.com/albums/t65/jack_weisenburger_2006/20131210_193352_zps6b7a69bb.jpg

 

http://i157.photobucket.com/albums/t65/jack_weisenburger_2006/20131210_193343_zpsfe8c2959.jpg

 

http://i157.photobucket.com/albums/t65/jack_weisenburger_2006/20131205_211439_zps871adb74.jpg

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