Unless you have a smallblock that can outrun one. If it's going to be a bigblock, it better be a baddazz one and be able to outrun every smallblock around. I vote for LS7 (although the polls are closed, lol)

Well then I guess we should all be running the 3800 V6 T-Type motors with a huge turbo.

???

I don't quite follow that thought, I just mean that if someone has a bigblock car, it should make enough power to compensate for the extra weight and also to be able to outrun a smallblock with 100+ less cubic inches. If not, then it's just a waste IMHO. If you are going to have a bigblock that is physically larger and heavier than a smallblock, gets worse gas mileage, is more expensive, but looks awesome, then it better make up for those things when the light turns green. That's all. I'm not trying to start a bigblock-smallblock war, as I have both...bigblock Suburban (496) and a smallblock Camaro (406).

Anyway...back on topic, I vote for LS7, it's lighter, it's a screamer, and with a couple small changes (cam-mainly), you're at 600 reliable horsepower.

i dont agree... if you want an ls7 for the bragging rights, by all means buy it.. but when you can get a built 427 ls3, that makes more power, costs less money and comes with the cam of your choice its just a waste of money.. the second you open the ls7 to change cam, the warranty is gone....

a 615hp 427 ls3 that comes with absolutely everything including a full tune, VVT computer and a valid warranty costs 13k. a 505hp ls7 is much more money just for the engine.. and when you add cam, harness, computer, dynotime dry sump tanks and hoses and gaskets etc. you are well into the 17 grand range, if not more... thats 4000 dollars wasted on the ls-7 name (and a voided GM warranty)... stupid in my book...

I assume you are talking about the Mast Motorsports ls3 here. I haven't seen the graphs's supporting their 615 hp claims while retaining the VVT, I am not saying they are not true, but I haven't seen any evidence supporting the claims.

FWIW, the ultimate N/A power potential of a ls7 427 is much higher than a ls3 based 427.

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Scoggin Dickey Seem to think things are on the up and up.

http://www.sdparts.com/product/MMS11...rnKeyWECM.aspx

As far as I know they are a pretty reliable outfit.

The link above goes to the 550 hp Turn Key for $10,109.00. Put a Water cooled Magna Charger on it and at a 40% increase in power your at 770 hp!

Many of them can get higher than that.

If you can beat that with a new LS-7 for the Money, as the saying goes, "I'll take what She's Having!" (Gender meant only in reference to the quote!)

Ty

So you are going to boost a 10.7:1 motor that hard?? Better have a good supply of race gas on hand. And it will cost you about $16-$17k in the end.

FWIW, lets look at this.

high compression ls7 short block (multiple sources) ~$6200
Stock LS7 heads with GOOD springs ~$3K
Stock LS7 intake $300
Custom cam ~$400
Other parts (covers, lifters, misc bolts, etc) $1500

$11500 and you have an easy 620-640 NA hp.


Different strokes for different folks.

Good debate, and just shows how great the LS motors are. You can't go wrong with either choice, IMO.

I drove my friends Z06 this weekend and it's amazing the pull this stock motor has all the way to 6500 rpm. It's 500hp that feels like more. My vote still for the LS7, until the LS9 :lol: , but it's great we have more than one great choice.

Damn it, I missed the poll.

502 Ram Jet
:thumbsup:

That is right, the worst(or is it best??) is the choices. Given a decent budget I could build any number of different combos, all would have advantages over each other. Just depends on what you want and like.