grocerygetter

iTrader: (2)

Mast small bore LS3 heads, black label choice
Ported/custom LS3 intake LS3 or LS2 throttle body
LS6-2/3 harness adapter for tb
Injectors, FIC
Custom grind cam
Custom Intake & 100mm maf from LPE or TSP (or if you can custom tune a ls3 maf in) if this option is needed…considering flow of current intake and 85mm maf may be a choke point.

My local shop (GPI) and I are playing with this idea. My goal is high 400whp range.
I just want a fun street car, no plan to drag race it.

Forcfed93

iTrader: (10)

Keeping stock shortblock I assume? If so, good luck. You'll need the perfect combination of everything to get anywhere above 450rwhp.

I think Lollygagger didn't even break 450 with a Tony Mamo ported AFR/FAST 102/Cam package.

bmylez

iTrader: (3)

Lolly said his 9" rear eats up some power, but yeah, this setup sounds like it will make mid 400s, definitely not high 400s.

ryridesmotox

You might want to consider going up in displacement if you want to make the jump to closer to 500whp on a NA motor.

NIKDSC5

iTrader: (10)

400's is easy with an ls6. Lolly made 441 or something around there with the 9" and @ 10.5:1 compression and not a very big cam. 227/231. So he has plenty of room to grow.

346 max effort, heads and flow mods to compliment a huge cam with fly cut pistons and high compression (12:1) can net around 500 whp out of an ls6. But......there are more problems with reliability and such that arise.

FoD

Everything I've read about the small bore LS3's (Mast or BSP's) is that on a 5.7L they are too much head. They are designed for a 383 stroked LS1.

grocerygetter

iTrader: (2)

we are discussing if that is too much head considering a custom cam may change some of it. We'll see. The dude posted the livernois combo at 441...this above combo has more potential for sure. I like the idea of the rect port heads because that lets me change cams next year and put a heartbeat maggie 2.3 on it. Plan b would be:
TFS215 heads (more velocity for stock cubes, should yield good solid midrange)
fast 102/102
LS6-2/3 harness adapter for tb
Injectors, FIC
Custom grind cam
Custom Intake & 100mm maf from LPE or TSP (or if you can custom tune a ls3 maf in) if this option is needed…considering flow of current intake and 85mm maf may be a choke point.

grocerygetter

iTrader: (2)

You do realize what I listed has way more flow potential than that combo you said Lolly used. LS3 worked over vs a 102 are within 5whp or maybe the same with intakes...comes down to heads and cam...and the MAST, custom cam I'm having done is more. BUT, the question is there that if this is too much without doing a built ls6 stroker. I trust my shop...I will roll with what they advise for sure...I will share here.
I KNOW what it takes to take a stock LS3 to 500whp and I can do that for $10k with labor and sell my 45k mile LS6 longblock to offset a chunk. (5th gen camaro experience there)

itsslow98

iTrader: (18)

Why not just piece together a tvs2300 kit or maggie 112? The list of parts you have in the OP will likely cost the same if not more for less power and a lot less low end toqrue.

grocerygetter

iTrader: (2)

I can get a maggie112 kit for the car for dealer pricing plus labor. I can get a great deal on a custom d1sc kit as well. I just really want to try NA. Maybe this isn't the car. I dunno. Tvs2300 not avail for cathedral in this pulley offset from what I have seen.

itsslow98

iTrader: (18)

Maggie will get you mid to high 400s and great low end torque. N/a in all honesty isnt as impressive as you would think in a 3850lb car with a raceweight over 4,000lbs. Its just my opinion obviously but if I were to do it again I would have just gone with a blower.

You can put together a 2300 kit for cathedral ports if you want to make the effort. Procharger is more involved and still lacks the fun low end torque.

grocerygetter

iTrader: (2)

Nah...my camaro was 3850 making 654whp through a v3 vortech and running mid 10 s....a centri will work..gears shift in a tranny. I would like to try a roots blower, though, yes. But with the kit for the V getting cut...I am not too fancy on it. Maybe I will just be happy with 440-450 whp and stick with cathedral heads, NA...plus spray it for 550!

BudRacing

iTrader: (3)

You'll also spend about half as much for a S/C setup vs the build you're looking at.

grocerygetter

iTrader: (2)

Nah...with labor on either in comparison...less to go NA.

ryridesmotox

Yea but who the hell would want to drive that on the street. You'd have a cam so huge the power band wouldn't come on tile like 4k. For a streetable car, forced induction or stroke it, nice flat torque curve

Assuming you pay labor and don't do it yourself. I don't have the equipment to do machining so that would add to cost for me. But that said, I'd probably do a SC build with a fresh lower end. I don't want to just slap a blower on a car with 100k miles. I'd do the install on the supercharger myself. Labor cost varies so much is hard to compare it in a books thread. But cost wise, cheaper to keep it NA

grocerygetter

iTrader: (2)

my car has 45k miles.

stratass

Spray it!!!

Onefast V

iTrader: (3)

E-Force blower and call it a day.

grocerygetter

iTrader: (2)

BTW...to everyone here...thank you for the brainstorming session...I don't always type like I think...just wanted you guys to know I'm listening to your points, for sure.

ryridesmotox

Oh, well slap some forced induction on that bastard then. The motor is just getting broke in. Maybe I missed it earlier but did something break? Is that why you are rebuilding so early? I mean, other than staying in a specific class for a NASA or SCCA group, I'd use a power adder over a stroker. 1 day of downtime vs a week of down time possibly. And I can do it in my garage.