I've thought about trying to find room for a resonator. Vette has a 1500-2000 rpm drone a resonator would kill nicely

 

[QUOTE=Darth_V8r;19730364]@Navy -- I'm with you on the splits. Since its stock untouched 243 heads, I feel 8-10 degrees of split is about right. And you called it on the clutch. Not looking forward to dropping that torque tube. I figure a 62cc MMS 235 would top it off nicely down the road

Wild Card Revision LOL!

MMS 235s (with NFI Exhaust) to go with your "Leftover"
MMS FAST 102 No Doubt.
I would also have Tony port the LS2 TB and use a
V Max Velocity Ring to eliminate lip at plenum entry
and simplify tuning.

225*/231* <.630"/.610" 115*+3*

If I didn't want to switch cams again (using 1.8 RR)
Would be LTs away from 500+ RWHP with the clutch &
EWP, maybe LS7 factory exhausts? (229* exhaust in that case)

 

That's really funny. I kept playing with calculator and re-reading tech's posts, and I am now looking seriously at 226/230-116+4. I think that'll be tame enough to not chop that hard or buck at all, work well with better heads, and support a reasonably broad powerband. Funny we came to almost the same number.

On the 243, I like more split, but they won't be on forever. And I think it'll run good on the 243 heads. I'll tighten up quench to gain some compression. Might throw the Johnson ST take outs in there to minimize pumping losses as well.

I keep getting these wider LSA, but it's the way the valve events are calculating. I am a tad concerned the lack of overlap will prevent power carrying as far as I'd like, but it's her car not mine.

Now I just need to buy her a spa weekend so I can go from dreaming to action lol.

Edit -- and good call on the NFI exhaust port. Help run less split, which makes it easier to make power with less exhaust duration

 

A 6.0 with MMS 235s & ~226* Intake will peak ~6600-6800 RPM and
Carry well, 7200+ even with minimal overlap. LS7 Exhaust Manifolds & Cats Probably worth 10+ RWHP on that combo, fits the stealth requirement also.

 

Genius up here ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
My old EPS 218/226 .595"/.598" @117+3 was almost un-noticeable in the 346"
with the neg 12 OL...prolly needed the idle bumped from 825 to 875. I milled the 241s .030" so static was near your LS2 stock...zero bucking M6 car and peaked at 6300 carried to shift of 6800
The 1 degree OL in my 368" burbles a smidge with 11.25:1 squeeze and a 900 idle..again no bucking and shift point of 7000..specs 226/232-.605"/.575" @114+3
Point of note on my original combo was that the idle did change when I went from shorties and four cats to the long tubes and 3" cats.....proving that exhaust velocity at idle can have a manifold vac. change even when the cam has negative overlap
So your manifolds and that 220/230 cam plus some milled 243s would prolly sound completely stock with a 900 idle and have zero drive-ability issues
AKA.....wife proof

 

Until she asks why the engine always idles faster than it did when you got it.... BUSTED! A case a wife knowing more than you thought......

 

Yep... Mine notices sounds change way before I do..
Maybe a nitrous kit... They don't change the engine noise... Well not immediately...

 

"I don't know dear,must be a leaking IAC."

 

What if she comes home and says " my 60 foot dropped 1.5 seconds and I lost my bracket! WTF did you do to my car?"

 

That's where you give her a BIG hug, kiss her and take her out to dinner, where you give her the new dial-in....

 

Lolz!! I'll just tell her I hooked HPTUNERS up to it. Not a lie, just one part of the story.

Honestly what'll make a surprisingly big SOTP "wow it's really responsive" feel will be the RPS clutch.

Good call on the LS7 manifolds and cats. That's hella sneaky!

To be fair she did say "sometimes I wish it was faster" so that kinda sounds like permission. Lol

 

KINDA??? Dude! That's the official Seal of Approval! Jump on that before she changes her mind! (women changing minds??? nawwww......)

 

I'm subscribed! I want to do a sbe LS2 swap into my 01 SS. Going to run stock 243's, long tubes and the stock ls6 intake. Emphasis on drive ability with an auto.

 

I had similar goals to the OP when I purchased my recent cam, although nothing to do with my wife, lol.

I chose the Cam Motion TTv2: 218/226 .595"/ .587" 116

This was for a Holden Monaro (Pontiac GTO in the USA) so a heavy car compared to a Corvette and running a 5.7. My car has CNC ported 241 heads and short headers and twin 2.5" exhaust. Its an M6 so sensitive to overlap.

This cam is very smooth, with -9.5 overlap the idle is pretty stealthy but you still know it has a cam. I personally believe for true stealth you may need something closer to -14 in a 5.7 but that may be debatable to some.

This cam is a bit lazy in the low to midrange rpm in my car compared to my old cam which was smaller and lower lsa but that was not really stealthy. Having said that, in a 6 litre I would expect this cam to be pretty much undetectable and the extra cubes of the LS2 and lighter weight of the vette would probably mean that there would be no lack of performance in the lower rpm like in my car. So it could be perfect for your needs.

However for some reason just after I purchased this camshaft Cam Motion removed it from their website so it may now be unavailable. The other cam I wanted was the EPS LS 214/232 .605"/ .598" 117. I think that may have been better in my 5.7 and my cam better in a 6.0 actually however I couldn't source the EPS at the time.

 

Simply chaging the lsa to a 114 would pick it up without increasing overlap too much.

 

That would take the cam to -6.00 overlap. That was what my previous cam had and i found that to be quite noticeable, not stealthy to me but others may disagree.

 

If you work with the tune -6* wont be noticeable. That's all in idle/park spark, over/under spark and fueling really. Not even making it idle above 800. 750s would hide it pretty well also.

 

Mine had a fair bit of tune work and it was decent in that regard but certainly not "stealthy" in my mind. Maybe to someone who doesn't know LS engines. This new cam is much closer even without a lot of work in the tune in that regard. My wife commented on the difference straight away, even just as a passenger.

 

I remember a EPS baby cam 222/226 on a 115 on a old thread.... it was quiet but laid down 430/415 with stock untouched 243 heads. Stalled automatic car that also ran 11s.

 

Perhaps consider a magnaflow catback as well. Believe me, its quiet. Especially with stock manifolds and cats. Its quiet even with longtubes and no cats.

-1 overlap at .050 idling at 850 doesn't chop too hard with my setup, although you can tell it has a cam. Id imagine a high lift truck cam would be easily concealed with the right exhaust setup. Especially with ls7 manifolds and cats.

This is mine, idle only. In person it has less rasp, more bass.