Hey everyone I have been able to get a lot of help from here. I have been kicking around ideas of engines and... But I really am leaning away from the build I have started of a 283 twin turbo. I just hate the lag!!! I really do like the nitrous. I am looking at buying a 400sbc getting vortech heads on it and a stealth ram intake for it and just tuning my whole efi to everything I put in it. But I dont know what power about I would push and what cam would work best?

 

Y not go with, 400ci, bigger heads and twin turbos?
Get the right turbos and lag doesn't really happen.

 

Honestly I dont know a big engine with high compression and a shot of spray just makes me happier. Also I like driving on the road and turbo that doesnt have lag will eat gas. Not sayin the 400 won't but I just have more control on na with spray. Plus I can hit more torque numbers out of spray

 

With turbos your not in boost just driving down the road, so your MPG is just like stock if you use close to the same cam.
plus you don't have to stop an change the turbo because it ran out of power like you do with a bottle.
Just something to think about. I have a N/A 400 stroker in my car and it is fun but I like the twin turbo cars I've built a lot more.

 

I appriate but I have drove a lot of turbo cars from the new dart to subarus to... I just never liked the lag. As with bottle you hit it a 100 at 3000 rpm and you have almost 200ft lb torque instantly and with this engine I could possibly have even more.

 

So you like the fact that once your bottle gets about 1/2 empty, you will loose the advantage because you lose pressure. I also use spray, but spray only lasts so long, and if you aren't building the engine right, The engine will only last so long. Lag usually only happens when someone puts too large of a turbo on an engine that doesn't push out an adequate amount of exhaust. So the next question is where will you use the bottle, City Streets, On Ramps, back roads, Who is going to fill your bottle all the time and how much? Have you considered what needs to be done to run N2O on your engine to include timing? Are you planning on running with a NMU, or straight solenoids and extra fuel pump? What about a bottle blanket?

So instead of going cheap and only running N2O, why don't you go supercharger?

 

I have thought supercharger the thing is I dont need the crazy power all the time. I still want to take it out and drive it when ever I want and supercharger is always running the gas. I am not worried about the tank running dry and I will have a new fuel pump for this build no matter what. I understand nitrous as I use it now so I already have the full set up and filling is not a problem at all.

 

Just because you run a supercharger or turbo doesn't mean your in boost just driving it normally.
It will run just like stock until you really lay into the throttle

 

Sounds like you've already made up your mind, so since the finale decision is yours. Go for it.
I'm not sure about this but I thought that a waste gate on a turbo was supposed to reduce or eliminate lag.

 

Dont put vortecs on a 400. Too small. Spend money on proper heads. Do a hyd roller retrofit and go around 230's duration at .050 for a nice 0-6000 rpm powerband for a good street bruiser

 

Would it just be to high of compression or the valves just wont breath from the head size to cylinder size? And a blow off valve helps reduce lag every shift by reducing back pressure on the turbo a smaller waste gate would make its power faster but restrict the potential. And a supercharger is always spinning which creates boost so gas mileage is not the best a turbo when you drive it on the road you stay in the lag for good gas mileage, the lag I dont want

 

Ports are too small to feed the large bores. They wont flow enough at mid-high RPMs. You can make it work if you go with a small cam, but what fun is that?

 

A supercharger and turbo are both always spining when the motor is running. Superchargers have bypass valves that dump unneeded boost when the motor is just being driven normaly. So the motor will only see the same amount of air as a N/A motor.

Turbos aren't "in lag" when driving, they are technically just a N/A motor when your driving. When you stab the throttle the bypass valves and wastegates close and boost happens.

What your feeling when driving those 4cly cars w turbos is lack of TQ and power. A V8 with proper turbos won't be like that.

It sounds like your going with NOS no matter what, I hope it goes well for you. I'm just trying to help correct a lot of mis-information you have picked up.