Couple of things. If this was going in a car, ls6 intake. If it was going in a truck, tbss intake. I don't get running an expensive intake with a FI application. Also, why do ppl get the biggest blower/turbo and run low boost? A smaller charger at that boost lvl would make more power.

 

the vortech 2.3 looks like it comes with a 4 inch pulley, from what i see is pretty large compared to people running 3.5 inch or lower. it probably could pull 10psi easy with a smaller puller. but yea i kinda see your point, like a tvs1900 could possibly run the same boost and add more power.



now i was just looking around and i see Texas Speed & Performance offers a bottom of the line 383 rotating assembly for 1700 bucks. of course depending on power, FI, nitrous, you could customize the kit:

http://www.texas-speed.com/shop/item...d=884&catid=88


EDIT: read through and they could only get 2.5psi with a 3.8inch pulley from that big s/c. they got those numbers from a 3 inch pulley. i guess there was more potential from the air/water intercooler that it offers

 

All things equal wouldn't the 383 have more torque than the 6.0 due to the stroke advantage? Also slightly more displacement in the 383...6.3L vs 6.0L

Makes me wonder if the 383 would be a better towing motor than the 6.0

 

Its economy, but thats actually a decent rotating assembly. I know of people who run eagle h beams and a stock crank under boost.

 

I wouldn’t say the desire to keep and building your original motor is idiotic by any means, especially if that’s what you have to work with, the smaller engines can definitely get the job done. A point that a lot of people will stand by is if you can swing the cost of another block to build off of, especially if it’s your daily driver, you can build a little at a time as money is available while still having use of your vehicle. And if you’re taking this route, there is then no reason not to get the best block you can afford for your foundation. On another subject though, I’m still not the biggest fan of 4.00” or larger stroke crankshafts in the stock LS1 or iron blocks, due to the shorter cylinder lengths and would prefer to give up a few cubic inches in return for longevity. I will say that due to the markets request for the largest stroke cranks that will fit in the bottom of the LS style blocks, that the aftermarket has responded in kind by offering what everyone has asked for and the 4.00” stroke crank kits are by far the most reasonably priced, with the 4.125” cranks right behind them. Yes cubic inches help build power, but one of the most important areas to concentrate on is the top-end. At least the LS style engines were blessed with great cylinder heads from the factory, yet it doesn’t mean they can’t be improved upon and is a big reason they respond so well to cam timing changes. Of course forced induction will cover up for a lot of inefficiencies and definitely make the engine seem larger than it really is.

Bottom line is plan, spend your hard earned money wisely and most of all have fun.

 

Big blower not working hard means much better temps than a small blower spinning its heart out

 

I'm in the process of building a forged 383 based on the 5.3 iron block. I have been reading that magazine and comparing what I'm doing to what they did. I'll be using a bigger cam and slightly higher compression and mounting a 2300 on it to replace the 1900 as money allows.

Some of the advantages of a 383 over the 400+ci LQ9 engines is better fuel economy under average driving conditions and lower block cost.
Advantages of the 400+ LQ9 engines include less valve shrouding, less machining, deeper cylinder sleeve and greater power due to displacement, all other things being equal.

Personally, I'd prefer a blown 383 over a n.a. 408 because I love the blower sound and look. I also want some semblance of towing economy, and because these days the LS 383 a bit of a rarity.

Yes, the 383 would have more power and torque than a 6.0 (364), the same way a 403 would have more than a 383. Therefore it would make a better towing engine.

 

some nice info stated by above by you guys. swift do you have a thread on your build? i would like to follow it.

 

Ii don't have a thread started for my build yet, as I'm accumulating parts right now. My cam just shipped yesterday and I pick the engine up next week. I'll make a thread but it'll be short and sweet. PM me if you'd like details.

 

oh ok, i actually read for like 2 hours after i posted up through your threads on the 1.9 tvs and your 383 threads. actually i was going through calculations trying to come up with what boost you could run with a 2.3 tvs on the 383 vs. a 1.9 on the 403/383. i came up with around 14 max on a 2.8 pulley. sounds like you will have a bitchin setup ill keep tabs on it.