[82c10]

what is the most nitrous a small block chevy can take

[97Z28]

500 shot if you build it right and have a NO2 timer. 150 shot stock if you tune it right and get everything just perfect. it all depends on how well you have it built and what kind of components you have in the engine.

[Rick WI]

It totally depends on the base HP and airflow. A 600 HP small block can inject a lot more than a 300 HP small block. Too much nitrous into too low of a HP motor will cause the nitrous to back up into the intake, causing an explosion.

There are no street small blocks injecting a 500 shot that I have either seen or heard of and only one race small block I know of that shot a 500, and that was a 454 small block with a pricetag well in excess of $40,000 and ran 7's in the quarter. Hell, in the Edelbrock Extreme Street we are shooting in the low to mid 400 range, with 525 big blocks. That's good for LOW 8's in 3500 lb cars. 99.99% of small blocks will grenade on a 500 shot.

In general a 200 to 250 shot is considered a lot to shoot into a typical 23 degree headed small block and still have reliability. 300 would be considered A TON.

[77z]

A local 10.5 inch tire class racer ( this is a plated and street driven car ) runs a 76 lt camaro with a 415 inch small block on a 250 plate 350 fogger but its very prone to going boom its like anything do it a little and your ok go for the max and open your wallet


Regards Mike

[mikeweyman]

does anyone know roughly what a well tuned,mild build 350 (250 +-hp)will reliably take? if i were to think nitrous,i would have to be fairly sure it wouldn't grenade my block every sunday at the track.
i'm guessing it will take a 100 h.p.shot without any adverse effects(the first week anyway).
Does anyone know from first hand knowledge what a stock 350 will take?how many times did you get to use it before the engine was all used up.

[NXS]

Schools in this morning kiddies!

Nitrous.

It has a bad rep of blowing engines up.

Why?

Because it's so easy to do.

An engine can only take so much stress/Hp.

If the engines bottom end can handle 400HP and it's making 200 it will just barely take a 200 shot.

But the same engine making 350 HP can take a 50 shot before it blows up.

Understand?

On the other side of the story... unlimited $$$ in the bottom end. It will take 1500 HP.

The engine dynos at 350 hp. it can take a 350 shot, try 400 you'll back up the juice and pop the top end off the engine.

if it is making 600HP you can shoot 600 to it before it backs up.

So the limiting factors are:

How much total power the bottom end{crank/rods/pistons/block} can handle and don't exceed the power the top end{cam/carb/heads} makes.

and of course if your fuel pump only puts out 400 HP of fuel you can't make a 350 HP engine make 500 HP by adding a 150 HP plate to it.

[Tech @ BG]

There is not a set number that a small block or any engine for that matter can handle. As a rule of thumb most good quality small blocks will easily handle 150 HP. Once you start to go higher from there you will need to custom build the engine, and driveline.

We've run well in excess of 500 HP on small blocks without problems, but these are engines that were specifically built for nitrous. Higher quality components, that are custom designed for nitrous. The pistons have to be custom made, with different size, and location rings. We've got a small block setup that is running with 3 stages of nitrous.

[Siggy_Freud]

Keep the timing in check when its activated (via a timing retard), run a wet system, perhaps some colder plugs, a WOT switch, and only activate about 3000RPM or so, and it should handle 100 all day long.

[82c10]

sorry to the first few, yes i meant stock, and i know part of it about Nos, my friends brother has a fox body mustang with a 2 stage 700 shot, it is pretty quick,