Here was my list when I was in your shoes:

ECS - more expensive, more power, less belt slip (I have a 6rip @ 15lbs with no slip) optimum choice if you want the most horsepower (700-750rwhp - which will require headers, exhaust, meth fuel system)

AA - Less expensive, less power, 5* lower oil and coolant temps due to a fin on the intercooler to focus more air. Optimum choice if you want to spend less. Good for 650rwhp or less

Both have equal reliability, customer service, installation difficulty.

If you have having it installed go with what your tuner recommends (they will know the ins and outs of it and install faster thus cheaper) They can likely modify an AA kit for more hp with a different head unit.

 

Mmmm well really it gets a bit hairy when you say more power/less power, because you can specify what size pulley you want.. so if you don't want the 3.8" that comes with the A&A kit you could specify a 3.4" and be making more power right off the bat for NO additional cost. Also saying 650rwhp or less is a bit misleading too because either kit you can upgrade or do extra stuff to, so I don't really think that's fair to say. I know off the top of my head a guy that made over 800rwhp with an A&A kit and the YSi/8-rib setup at 14.5psi and meth. And in my situation with a 402 built at 9.2:1CR, pushing only 8psi with pretty much everything else already done to the car, I'm making over 600rwhp without spraying meth (safety only)... running the 3.8" 8-rib pulley so whenever/if I ever want to pulley down I can go way down

I do agree with you 100% to go with whatever your tuner/installer recommends. Sometimes even buying from them directly is cheaper because they'll cut you a deal. You really can't go wrong with either

 

 

Guys I'm looking to make good numbers that would b safe on my stock motor

 

Are you doing the installation and tuning yourself? If not, who do you plan to take your car to? Have you asked them their opinion / what system they'd recommend going with?

 

 

Well said, one thing to consider though is that if you add the additional parts that we include, and upgrade the head unit to the T-trim, I do not think there is any price difference between the two. Our kit may even be less expensive at that point, but I have not broken them down exactly. Maybe one of our salesman here have and can comment farther on that subject, but regardless they are probably within $100 at that point. Plus the ease of belt changes from our kit over others comes at no additional expense too.

We have many customers, if not what seems like most customers, who step up the power later. If I had a dollar for every time I heard "500 rwhp is plenty for me" and now they have 700rwhp...

Our kit comes ready to upgrade the power without any additional upgrades. To a point of course where pulleys/belt size etc have to be increased, but we have many nine second cars on just our base kit out there. Not many are going past the mid nine second area, so few really need to go any farther then what they purchased originally.

The added low end TQ is worth it's weight in gold when you just left your buddy a few car lengths behind from our restrictor plate design we use on certain applications like a stock car, and in general the ECS cars do run just a little faster on average. There are certainly fast cars from both kits, but there are a lot more ECS cars in the nines then any other power adder on this forum. Does that mean you need to intend to race at all or run nine second 1/4 mile times? No, but it's certainly nice to know that your ready to go if you wish to turn it up. If not, you have the knowledge of knowing that the kit was made with that type of HD usage in mind. Over build and under use is not something that has a down side here IMHO.

Is part of that because we are at the race track regularly while others may not be? Sure, but that also gives us tons of rough usage data to know where and why we needed to put items in our kit like a HD tensioner and idlers that cost $80. We can buy idlers for $8 if we wanted too that would work great on a DD, but I have to answer to our racers face to face if something happens at the track because we are there with them.

Hope that helps, and we have a few deals going on now if your interested.


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Ask me how I know this. Launched 10 belts or so we a bad balancer, and each time, had to pull the YSI head unit off my A&A

I like the ECS a bit better, but I would go with whatever your tuner is a retailer for.

 

BornSUPERCHARGED is right. We ship C6 kits with a 3.80" for stock motors, but you can get a smaller pulley if you request one at no extra charge. Also, where did you get the data that shows 5* lower oil and coolant temps due to the duck bill? You can make more than 650RWHP with an Si.

690RWHP Si-Trim
http://www.aacorvette.com/blog/?p=2657

704RWHP Si-Trim
http://www.aacorvette.com/blog/?p=2508

712RWHP Si-Trim
http://www.aacorvette.com/blog/?p=2097

672RWHP Si-Trim
http://www.aacorvette.com/blog/?p=1712

717RWHP Si-Trim
http://www.aacorvette.com/blog/?p=1561

700RWHP Si-Trim
http://www.aacorvette.com/blog/?p=967

Just a few examples. Not bad for the "little" Si and plastic idlers. For those looking to make more power we offer kits with a T-Tim, or YSi.

 

Everyone of them needed a cam to hit those #s

 

They are likely blower cams, sooo not really sure what your point is because if you put 15 pounds through the stock engine you won't need a cam to go well over 650rwhp

 

Will a stock engine take all that boost

 

http://forums.corvetteforum.com/1574302984-post2.html

Mr.Big's LS2 handled 15psi for 35k miles if I recall correctly. I think they also removed it before it even died, it was still going. Also its really hard to find a dyno chart of a supercharged LS2 running 15psi without it also having a cam I am certain it'd be at or north of 650rwhp though.

 

I just completed an ECS kit on my C6/A6 made a moddest( )738 rwhp and 662 rwtq. I also had headers, cam and meth. But that is what I wanted. It is an awesome kit. Excellent quality. Take advantage of some of the specials that are going on right now. The powder coated parts that they are offering adds just enough bling to really make things pop under the hood. Matt and Doug are great to deal with. Customer service is tops. If you are close to Louisiana there is an awesome shop and tuner there. Lethal Racing. Ask for Shawn. He and Mike will not dissappoint you. We are about to post a build thread on the forums featuring my car with videos and pics. We have been slow about it but it is coming. If you want any of my observations so far about the blower or the shop feel free to contact me via PM and we can talk.

ECS and have no regrets !!!

 

I love, love, love my A&A kit. I never even considered another kit as I "only" ever wanted mid 600rw #'s and I was Confident in England Green's ability to do the kit right. Really my only wish is that the damn head unit didnt have to be removed to swap.a.belt.

 

In my profile is a dyno sheet of an LS2 at about 14psi with stock cam. 735rwhp

 

OP if you want to say you have a S/C and want to save money, just buy the A&A kit and call it a day!

However, If you want the best kit that you can grow in HP without changing all those stupid pulleys, belt changes, and head units. ect.....

Just go with the proven ECS system that has the best head units to start with along with the BIGGEST intercooler and no belt slip at 13lbs of boost on a simple 6 rib! Not to mention they hold several records for fastest stock bottom end, and fastest IRS Corvette. ECS is the BEST out there proven!

SHOW ME THE RECORDS A&A BRAKE AND I WILL SELL MY WHOLE S/C SYSTEM!!!!

UNTIL THEN, ECS IS THE BENCHMARK FOR FORCED INDUCTION AND IS PROVEN SO!!!!!

 

Glad you LOVE your A&A kit, you would have made more power with an ECS system, but you went with the cheapest available!

Don't have to remove the head for a belt change, with ESC setup!

 

It kills me that all you tight wads save money on your 50k plus C6s and your wanting more HP and you go with the cheapest S/C kit you can find!

Why don't you spend the time to find the best for you car?

 

As others have mentioned just do a search and make the wise decision.
My DD is a 2008 Corvette with a Paxton 2200. I am very happy with my numbers: 784.7 RWHP with 684 foot pounds of torque. Ask a lot of questions if your installer and tuner can't answer them them find someone who can. Good luck on you choice but for me it is ECS all the way.