mjoldschool

In about a year or so I will be doing an Ls swap in my 66 chevy biscayne. I would like to do a pro charger unit (Disc possibly). I would like to achieve about 700 rwhp, a choppy cam, and a lil low end torque that will pull forever. I don't want to really have to spin the charger to its max to retrieve the 700hp goal. This as a 99% street driven car and I drive it everywhere. What block should I start with and Why...
5.3 (iron) forged internals
6.0 Lq9 forged internals
370 6.0 Lq9 forged internals
408 Lq9 forged internals (probably have to switch to F series pro charger)
OR 6.0 LQ4



Please share your opinions
Thanks
MJ

conan

iTrader: (5)

Does weight matter to you ? The iron blocks are 100-110 #'s heavier than the aluminum blocks.

mjoldschool

weight isn't really an issue. My main concern is strength and longevity

conan

iTrader: (5)

If the weight isn't a concern I vote forged 370ci at 10:1-10.5:1compression.

mjoldschool

Will that compression be a little to high? What is the advantage of running a higher compression rather than a 9:1-9.5:1

conan

iTrader: (5)

I'm 10.1:1 compression on pump gas and meth injection with no problems. You said this was a 99% street car, Low compression will be a dog down low and out of boost. I had a low compression 347ci and wasn't a fan of the part throttle and out of boost driving. With my new 383ci on 10:1 compression It has a ton of power down low and is much more enjoyable to drive around town again... Not just wide open throttle on the hi-way.

mjoldschool

You make a very very good point!!!! Will I have to run a meth kit if I run an intercooler? I really don't want to run meth. It def will be a pump gas 91-93 octane car

mjoldschool

Conan I was looking at your pics. What did you paint your intake, water pump, and pulley brackets with? It looks awesome. how does it hold up to the heat

conan

iTrader: (5)

You don't have to run Meth but I would recommend it. It only comes on under boost conditions, so your not having to fill this all the time. I drive my car 1,000-1,500 miles a year. I don't even use an entire gallon of meth in one summer, and I pretty much drive this thing like I stole it when she comes out to play.


I went to a paint shop and had them mix me rattle cans with a hi-temp additive. It was enamel base base paint, that had a 24 hour shelf life. It's been holding up great to all the heat. Sienna Red Metallic is the color, its a 1998 Mitsubishi color.

DavidBoren

I think the 370 would probably do you best in this situation. Definitely try for 10-10.5:1 static compression and ~.035" quench. Look into Tony's new 223cc "Sportsman" cathedral port heads with his 1.6" exhaust valve upgrade. I would run an intercooler for sure, and a simple single nozzle meth kit for added safety. It's just windshield washer fluid, it's not like it's expensive or anything, and the additional insurance it provides is worth it.

Detoxx03

iTrader: (14)

Agree 100%. Too many people are scared of compression on this site. Meth is a great option especially when tuned right. I run my car at 10.7:1 and if I knew I'd be doing flex fuel I would have bumped it to 11.1:1

On 93 you'll be fine and even better off with a alky control kit.

mjoldschool

Loving the input. They are all good thoughts. Is it better to run a self contained or oil fed

DavidBoren

I would, and plan to, run the self contained D1, or D1SC. Fewer points for leakage, in my opinion. You have to keep up on maintenance with everything, so keeping track of and logging how many miles are on your head unit, and replacing the blower oil as recommended should not be too much trouble.

mjoldschool

Gotcha. I figured it would be a lot easier to run the self contained unit. don't have to worry about the transfer of hot engine oil and debris to the head unit.

mjoldschool

Currently I have a forged 383 stroker in my biscayne. It has a very choppy cam. I would like to retain the choppy rumble along with the pro charger. Is it possible to use a 600 something lift cam with the pro charger and still be able to pull high rpms?

Bob@BruteSpeed

iTrader: (16)

http://shop.brutespeed.com/Brute-Spe...d-Camshaft.htm

Check out my blower cam, it has a nice choppy idle and works very with a ProCharger. Bob

mjoldschool

Wow that cam looks and sounds great!!! I will surely be emailing you to get more info

mjoldschool

Would a water to air cooler be better?
I take the car to the city a lot and normally have to deal with traffic

mjoldschool

Never mind I think I kinda answered that question after a little research. A to A seems to be a better option

Blown06

iTrader: (32)

Not sure I understand all 4 of the choices. Whats the difference between a 6.0 all forged and a 370 6.0 all forged? Rhetorical question really. The difference is one is .030" over bore on one. I assume since you are doing a forged bottom any of the engines will be getting a fresh bore and pistons anyway.......so that is why I'm trying to understand what you are getting at for the difference.

I voted 408. No replacement for displacement......unless you are class limited.