silent but deadly
Thread Starter
Burning Brakes
Joined: Jan 2019
Posts: 1,214
Likes: 215
From: Dallas, Tx
For the effort you would be going through I would put a titan 2 cam or equivalent. Put a good set of valve springs like psi 1516s (everyone hates on a beehive but you can loose a pound out of the valvetrain) Dont touch the heads they are capable of supporting way more power than you will make. E85 will only help with about 30% ethanol, anything more and its just wasting energy (you wont see a gain and tax the stock injectors). We built a ram air for my car and it really works well. Car sees 101kpa on wide open pulls. Gear would be my only other suggestion but before I did it I would see how the set up performs. Its a pricey mod.
Thread Starter
Burning Brakes
Joined: Jan 2019
Posts: 1,214
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From: Dallas, Tx
So, here ya' go. How silent do you want to be and how deadly do you want to be? Lots of good stuff above. If you're not going the p/d blower route (ultimate silent but deadly rig in my book), your cam choice and cubic inches are going to dictate how silent you are, and how deadly you are. You can get by with less camshaft (more silent) with port work on the heads and intake manifold.
3.42 diff gears are an excellent A6 upgrade if you're more into racing from a dig...providing you can hook 'em. Spinnin' ain't winnin'. Lots of ways to skin that cat. Vettes are an AWESOME platform to play with. Light vehicle weight with a very capable engine, tranny, and rear end. Just begging to go faster.
3.42 diff gears are an excellent A6 upgrade if you're more into racing from a dig...providing you can hook 'em. Spinnin' ain't winnin'. Lots of ways to skin that cat. Vettes are an AWESOME platform to play with. Light vehicle weight with a very capable engine, tranny, and rear end. Just begging to go faster.
Le Mans Master
Joined: Dec 2005
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From: Southeast TX
With a proper tune, the tranny and rear end will be fine at any power levels you're considering. Transmission will probably be the limiting factor when you up the power levels. Diff and axles have proven good for more. Disclaimer....when you have a higher level of thru put through the drive train, the chances of parts failure go up. Kinda need to pick a spot and dig in. At the power levels being discussed here, you're OK.
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The stock axles are surprisingly strong as I had over 70K street miles and a few thousand passes on mine before I finally broke one. I ended up having to upgrade to DSS axles but only because of NHRA regulations. If that wasn't the case I would have just stuck with stock ones and replaced them when necessary.
Thread Starter
Burning Brakes
Joined: Jan 2019
Posts: 1,214
Likes: 215
From: Dallas, Tx
With a proper tune, the tranny and rear end will be fine at any power levels you're considering. Transmission will probably be the limiting factor when you up the power levels. Diff and axles have proven good for more. Disclaimer....when you have a higher level of thru put through the drive train, the chances of parts failure go up. Kinda need to pick a spot and dig in. At the power levels being discussed here, you're OK.
Thread Starter
Burning Brakes
Joined: Jan 2019
Posts: 1,214
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From: Dallas, Tx
With a decent tune the A6 can last with a lot of power but only for so long. It's not so much a question of how much power can it withstand, but how much overall abuse it'll take. With a built one like I have in my car I'm up to at least 500 low 10 second passes since I last had it freshened up and even then, it was only because I snapped my output shaft. The internals themselves were otherwise in great shape and didn't need replacing.
The stock axles are surprisingly strong as I had over 70K street miles and a few thousand passes on mine before I finally broke one. I ended up having to upgrade to DSS axles but only because of NHRA regulations. If that wasn't the case I would have just stuck with stock ones and replaced them when necessary.
The stock axles are surprisingly strong as I had over 70K street miles and a few thousand passes on mine before I finally broke one. I ended up having to upgrade to DSS axles but only because of NHRA regulations. If that wasn't the case I would have just stuck with stock ones and replaced them when necessary.
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With a decent tune the A6 can last with a lot of power but only for so long. It's not so much a question of how much power can it withstand, but how much overall abuse it'll take. With a built one like I have in my car I'm up to at least 500 low 10 second passes since I last had it freshened up and even then, it was only because I snapped my output shaft. The internals themselves were otherwise in great shape and didn't need replacing.
The stock axles are surprisingly strong as I had over 70K street miles and a few thousand passes on mine before I finally broke one. I ended up having to upgrade to DSS axles but only because of NHRA regulations. If that wasn't the case I would have just stuck with stock ones and replaced them when necessary.
The stock axles are surprisingly strong as I had over 70K street miles and a few thousand passes on mine before I finally broke one. I ended up having to upgrade to DSS axles but only because of NHRA regulations. If that wasn't the case I would have just stuck with stock ones and replaced them when necessary.
Thread Starter
Burning Brakes
Joined: Jan 2019
Posts: 1,214
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From: Dallas, Tx
Just for reference, my A6 finally gave up the ghost at 157K miles. I had about 450 1/4 mile passes and saw many WOT to 100 mph freeway ramps, plus backroad tuning runs. The pan was fairly clean at 140K, but loaded with metallic black death at the end. The magnet looked like a donut with thorns.