ChrisUlrich

Stock LS3 short block
Blower-ish spec cam
Kooks LTs
Kooks ORX
2.5" cutouts
Stock gearing
M6
Car made 453whp on a Mustang dyno

I am seeing that the A&A kit will make more power on 93 octane due to lower IAT's from the better intercooler.

ECS kit with meth, is a better performer. Even if they both make the same power.

The goal is 690whp and/or 138mph trap speeds.

A&A can make 690whp on 93.
ECS kit NEEDS meth for that power. But will outperform the A&A kit when it comes down to being the faster car. That's not been confirmed... but what i've been told.

I'd love some opinions on this!

Patriot Six

This is sure to start a war. I'm biased towards the A&A kit, but my car was built in SoCal so I went with the A&A kit with CARB approval. Either kit can easily meet your goals. ECS kits typically make more torque due to the use of a restrictor plate. Can't go wrong with either, but either kit should use meth or e85 for that power level.

ChrisUlrich

I'm kind of hoping it does. hahahaha I'd like to read a lot of what people think! Especially their experiences.

I have read that the A&A wouldn't need meth because the intercooler will keep IAT's down and prevent detonation.

Patriot Six

I do like the intercooler design of the A&A kit better. It channels air better into the intercooler. I would still highly recommend meth for that power level regardless of kit. Not worth the risk of detonation.

ChrisUlrich

I suppose going with meth just incase isn't a bad thing!

Patriot Six

Nope. Very low maintenance for a bit of security and more power.

needcheese

I have the A&A kit with the V3-TI. I have 3.90 diff gears. I also use the alky control meth kit. I only use it for safety not a power adder. The sc boost is at 12 lbs. My tune is at 11 deg. The rwhp was at 680 on a fresh engine.

Whichever kit you do go with, I suggest upgrading from the basic head unit. It is cheaper to do this when purchasing the kit. You will pay more if you want a bigger SC later.

ChrisUlrich

But isn't the bigger supercharger far to much for the stock short block?

Honestly... if I plan to ever go bigger, i'd probably aim for a F1A, F1X type size... but even at that power level, i'd probably go turbo.

I am under the impression that the smaller Vortech will get me boost quicker and make my 700whp with zero issues.

ChrisUlrich

Do you have any times at the track?

needcheese

I was still planning the be NA with the 3.90 gears. I had a lifter failed. I went ahead and forged and studded the engine with SC. The track I go to does not prep well. I get very little traction with 1 and 2. My best trap speed is 103 in the 1/8. I have to shift to 4th. I don't go to the track that often.

My general understanding is no more than 7 lbs boost on a total stock ls3 engine. I am at full boost at 3k RPM.

LSX228R

700rwhp is a joke for either kit with your setup. Can't really go wrong.

ChrisUlrich

I hear a few shops getting to the 700whp range on stock short block... that sounds kinda scary. Some shops agree with that, some don't. But just about everyone thinks 670whp-ish on meth is safe, comfortable, and will obviously be very fast. hahaha

So that's kind of where i'm at right now.

I'm leaning towards the A&A kit. I like the idea of a better intercooler and getting the oil fed t trim.

EvanZR1

I have the A&A and highly recommend it, but the ECS is nice as well. For the level you're shooting for, you really need meth for safety at the very least, and possibly for power. Also, while the A&A can do 700RW (I'm there now on the older V3 Si kit), it's not going to do it on the "normal" kit. Base A&A will do 175-200HP over where you currently are. To get more than that, you're going to need to go with a smaller pulley/more boost and/or tuned for power on 100% meth injection.



A&A and ECS both come with the T-trim now, so no need to upgrade. That blower will easily push 800RW maxed out.

I'm making 700RW on a stock LS3 running 11.5psi. We upgraded the valvesprings, pushrods and rocker trunnions when I went to the 3.4" pulley, but otherwise it's stock cam and doesn't even have LTs (just LS7 manifolds). Of course I'm running a buttload of meth (dual nozzle Alky kit). And yes, the V3 Si (what I have) is more efficient in it's range and reacts quicker, but if I had it to do over, I'd go for the T-trim. I'm maxed out on the blower at this point. I could probably get another 50HP out of cam and LTs, but that would be it. Much easier to go with a bigger blower and throw more boost at it if I wanted more power (which I don't).

IF all you want is 700RW, then the V3 Si will do the job just fine, but I would at least do the T-tire since it's a no cost difference.

7 would be the limit I'd do if you're going to stick with 93 octane and no meth. With meth you can easily run 9psi safely. Did that for a full year and about 12K miles with lots of hard running, including a 1/2 mile event (12+ passes) and 1 mile event (19 passes) as well as lots of HARD street driving. Beyond 9psi, I'd do valvespings and pushrods on a bone stock LS3 and probably wouldn't push beyond 12psi on stock connecting rods, but I've seen guys run them all the way up to 1,000RW on a stock bottom end LS3 and have them hold together just fine.

ChrisUlrich

Thank you for that response!

I am going to go with the Vortech V1 T Trim and meth on my kit. Looking to get 670whp. So about 200whp more than where I am currently.

I'm hoping that 9psi is all i'll need to get there.

How much boost you running to make 700whp on a stock motor?

What kind of mph are you getting at all those events?!

EvanZR1

History:
Completely stock: 393RWHP / 389TQ
LS7 exhaust manifolds: 407RWHP / 397TQ
"Base" A&A kit (3.8" pulley, 8psi peak): 600RWHP / 525TQ
3.6" pulley (10psi peak) & 100% meth (dual nozzle): 672RWHP / 588TQ

With the 3.4" pulley, peak boost is now 11.5psi (getting a little belt slip, not surprising on the 6-rib setup). Haven't dynoed it, but ran a friend making a little over 700RWHP and we were dead even. Top speed at the Arkansas Mile las year on the 3.6" pulley was 187MPH, hoping to be over 190MPH this year with the 3.4" pulley. Did 162MPH in the 1/2 mile on a slipping clutch, which was 5MPH up from the 1/2 mile times in Arkansas (or course it was at a different track, time of year, etc, so that doesn't necessarily translate).

ChrisUlrich

That's incredible!

How did the car feel at 187mph?

You ever run the 1/4?

DOUG @ ECS

EvanZR1

Thought I replied to you last night, but must not have hit submit. Anyway, car felt very stable at 187, and even through 190. Arkansas Mile runs on a 2.2 mile runway at an old air force base, and the condition of the runway is great, nice and smooth with plenty of room. I stayed in it past the traps so I could honestly say I've done 190 even though my time slips for the event don't show it. I will say that every 10MPH over 150 is a BIG step.

Haven't done an official drag stip 1/4 with it, but my DashLogic will measure that. The last 1/2 mile event I actually checked it, and it reported an 11.4@139. I know it's not going to match exactly to a 1/4ET, but should give you an idea. Of course that was on a slipping clutch.

schpenxel

You want meth regardless of kit if you're wanting 700rwhp

Either kit can get you there. I'd at least do the (free) larger head unit upgrade if you go with A&A

Patriot Six

I agree. Go Ti-trim from the start and it will take you to the upper limits of what is still streetable and relatively easy to maintain.