JakeFusion

iTrader: (7)

So, I need a new converter. And I have two reasons for it: 1) I'm planning on doing a Procharger ~ 650rwhp with my current setup. And 2) I need something more daily drivable livable.

So background: I have a CircleD 2E now and with the 3.23s it's a bit loose in traffic (3000 RPMs to stay with traffic). When I had my bigger cam, it was a very good match for top end screamer. But I swapped in a milder cam and don't need so much top end now. Especially with the Procharger planned. So I'm going to do 3.73s here in a week or two and see what that does. And yes, I know with 3.73s and a 26" tire I'll likely have a bad combo for the quarter mile, but I want something street friendly first. And if I do any racing, it'll be 1/8 mile, so the 3.73s+26" would be better suited there.

Anyway, the reason the 3k RPMs bugs me is because the Kooks True Duals are pretty loud. And it's very hard to creep along in neighborhoods or in traffic without it wailing with the current setup. It also drones in the 1600-1800 range enough that if you drive at 60mph for 20+ mins you end up with a bad headache. So I figure 3.73s will allow me to lockup around 50 and avoid the drone range (I'd end up just above it where it's way way quieter).

Ok good. I'm set with the 3.73s. But I don't want the unlocked driving to be 3k. I hope it's closer to 2500 with the 2E after that.

But the 2E is still not the right converter for the Procharger and will be too loose and the Procharger will blow through it.

So, I've talked to CircleD about getting a restall and going to the 4C which is recommended with Nitrous and Prochargers because of how tight it is.

Brian @ CircleD said it would drive in traffic at 2500 rpm with the 3.23s. And it has a 1000 RPM drop between shifts. The 2E has only an 800 RPM drop. So tons of shift extension with either.

But I keep hearing about how tight an SS3600 is. Does it drive tighter than 2500 in traffic with 3.23s? What about with 3.73s? For either?

How many RPMs does it drop? I've seen 1300? The SS4000 is 1000 and 2500 in traffic. So is the 4C closer to the SS4000 or SS3600 in performance and civility?

I'd like to be around 2000 in traffic so when I lockup at 50, I pretty much don't notice it. Right now, I notice going from 3000 to 1200 or so and I pray for it since it's such a huge difference in noise.

Would the 4C and 3.73s get me to that 2k for light throttle acceleration? Or would the SS3600 be a better match? I like CircleD because I already have it. And it's rated for more power. So this would be a one time change for me. But I want it to be right.

So I'm asking for folks who have either to provide some input to see if I'm close in my assessment.

Thanks

sxc Z28

I honestly can't answer all your questions but I have a SS3600 with 3:73s on my bolt-on car and the shift extensions are 1200 on the 1-2 and 1000 on the 2-3. It drives great for a big stall auto daily. The SS series is for NA cars tho so if you're putting on a Procharger I'd contact Yank and ask about the Power Adder Series(PAS) line they have and stay away from the SS.

JakeFusion

iTrader: (7)

I've heard the PAS series is tighter. But for like 650-700 the SS typically gets recommended. The PAS is for more power usually. But that's something to look at too.

What does it do in traffic with that combo? Are you moving with traffic at 2000? 2500 leaving them behind?

sxc Z28

The PAS is also only rated to 650rwhp just like the SS but I think I read somewhere they created the new line of PAS because the SS were causing problems with SCs and bigger shots of N2O. The SC series is the large one(10.5in) rated to 1200rwhp.

My car is moving in traffic before 2k. TBH anything below 3k feels pretty stock but after that its hang on lol. I have Kooks TDs also highway driving only bugs me after about 1 hour of the drone but not as bad as you're saying.

JakeFusion

iTrader: (7)

The 373s take the Kooks out of the worst of the drone range. Pretty much anything over 50 would do it. Now, it drones some at like 2500+ as well just cuz it's loud. But it's not the same as the drone that shakes and vibrates the car. That's what gets you and what I get in that 1650 range or so. The louder noise I can deal with. Hell, some Dynamat would fix that. But nothing fixes true resonance drone.

And yeah, that's it. The PY series. The PAS is based off the SS from what I recall. But under 2k moving is good. That's what I need.

I wonder if the 4C/373 will be that tight? If not, it might perform better and still be reasonably streetable if it's close to that.

I'm still spinning to 6700 so even a 1200 drop is a 5500 shift extension.

01ssreda4

iTrader: (96)

I loved my 3.73 26 combo. Came through the traps in the low 120s and about 6k RPMS, which gives you room to grow some without leaving a ton on the table.

As far as the converter stuff, you're trying to make the converter fix your exhaust. Wont work that way. Quiet the car down to where you aren't nitpicking the driveability of the converter, bc between me and you, they are all gonna be similar. Don't blame the converter when you said yourself, the car is basically too loud.

wht/73

I think the 3.73's will "tighten" his current converter.
I may have mentioned it in another post but my 5C with 4.30's is almost too tight.
In reverse it will do 10mph at a 1k idle. It also goes pretty good in drive too at idle.

This will get rid of the drone.
They were inside of my wifes 11 2SS mufflers.
Google Helmholtz chamber

http://www.camaro5.com/forums/showth...=102075&page=2

JakeFusion

iTrader: (7)

Procharger will push it well beyond low 120s...

As I said, it's a two-fold fix. I need a different converter with the Procharger. And the added benefit is I can fix some issues with the exhaust. I'm still going to have to do something - and the J-pipes would be easiest. Probably easier than swapping in Magnaflows. Plus I don't really want to change the aggressiveness of the car. Just eliminate the resonance frequencies.

But the 'verter swap has to be done either way.

01ssreda4

iTrader: (96)

Id do that then and see where you're at.

JakeFusion

iTrader: (7)

Yeah. Well like I said, I have the 3.73s. So they are going in no matter what. And then I'll see if I want to pull the trans. Or wait.

But if I do J-Tubes or just swap out the bullets for some Magnaflows I think it'd make it better to drive everyday.

It's not that I think the 2E is too loose. I actually like the way it drives. So maybe the 373s tighten it up and the quieter exhaust holds me over until I get the Procharger on there. At which point, the 4C would go in and then it improves even more.

I was just sort of curious on the SS3600. Since the turnaround time is around 2 weeks from shipment to shipment from CircleD, if I took to a shop, the car is off in the corner for 2-3 weeks. If I bring them a new converter to swap, I can get it done in a day or so and then I can just sell off the 2E (I have to pay for a restall since it's been 3 years anyway). So I was weighing, in part, whether to just go ahead and buy a 4C outright and sell off the 2E since it'd be a wash in price. And then that would limit how long the car sits in a shop... If I do it at home, I don't give a ****. Lol.

wht/73

I think the J tube's will do it for you.
When we took off the suitcases on my wife's Camaro, to put on the pypes boom tubes the drone was horrible.
The 16 2SS convertible has the cut out switch from the factory.
That thing has 1 huge suitcase instead of 2 med ones.

I'm with you, throw the 73's in and see.

01ssreda4

iTrader: (96)

Gears will definitely tighten the converter up some. I just swapped the yukon from 3.73 to 4.30 and I can definitely tell a difference on light throttle. It will still flare pretty good under moderate throttle but the initial get moving rpm and driveability definitely got better. It has a loud exhaust also so thats my judging point of motor rpm.