yeah, i know the motors good up to the 125 progressive. at the moment getting up to a 100 shot by spring safely is my goal. gives me a coupla months to get new rods and wiesco pistons. in the gm build when they slammed the car with the juice the rods went first. actually the #4 rod was the one to go when my first engine blew.

 

My Alero blew apart rods 1 and 3 when it grenaded itself...go figure eh

 

Also timing is going to be an issue.

anybody's thoughts on direct port? i can get a kit cheap...

 

I don't think direct port is worth it. Considering we can only run a realitivly low shot, the benifits of having direct port are not worth the hassle. Now if you had a stronger engine with some tunning capabilities, id say gun-ho!

 

but if you think about it the main problems we have is that we have one cylinder that gets a sudden hit and also puddling in our intake manifold. so a direct port would pretty much solve that problem. a direct port can be brought down to a 75 shot easy. its all about how you use the jets. friend of mine's dad loves direct port. he build and races 1.8ts on the bottle all day. he recommended that i did a direct port and a 100shot. i may look into this. i get these parts cheap . gotta love the hook up. also im going to look into adding a stage to my current system.

 

I thought GM snapped all 4 rods on a straight 150 shot (not progressive)...

also if you think about it...how many turbo guys are pushing around 100whp more than stock with no problems? its all about how you apply the power really...

 

Thats not true, the injector sprays into the intake, which then mixes with the air and then is distributed between the cylinders, the nitrous doesn't prefer one cylinder

 

no but the way that the motor runs as it being turned one cylinder is always the one that get the first blow. on some occasion it might be a mix of two cyinders, but the way the I4 is setup is that once that line of n2o and fuel mix is coming through your intake manifold one cyulinder takes the 1st hit.

im talking about a wet system not a direct port.

 

Yes and No. the stock rods are rated by GM at 250hp. Now the could possibly go to 300hp but IMO, steel rods just can't take the beating. Eventualy even with all the percautions in the world, you would still break the stock rods. 100 shot is the maximum I would safely recommend going. Anything else and you run the risk of engine failure. At the end of the day the 2.2 was just not build to take it. It was engineired to be a race motor, just was never outfited with proper parts. I hope this makes sense. The stock rods from the 2.0SS will go on our car no problem, and that would make that stronger, but then you run into top end problems, as the heads just don't breath enough and so on and so forth. Basicly its a never ending battle of finding the weakest link.


Its not as big of hit as u make it to be. Remember when you shoot, ur usualy at 3200-3500rpm, so take 3500 and divide by 4 (4 strokes in a cycle) =875. That means the engine is going through the 4 stroke cycle 875 times at 3500 that means that all the cylinders are getting nitrous. Now what you are saying would make sense at say a race car thats spraying right off the line, in which case the nitrous would be poorly distributed

 

Even at that RPM range its too fast to have a perfect ditribution of the shot over all 4 cylinders. there will always be one cylinder that take that hit. Every case of a n2o fatality one cylinder is always the damage. now like you said it probably isn't as bad as it may seem, that i agree with, but now we're talking about a 100shot on a totally unbuilt motor. in terms of these condition it a pretty hard blow. thats why a progressive shot is recomended or if you know how to use a direct port correctly that'll work as well. It doesn't realy go by the stroke of the motor since its an I4 there is never two cylinder at top dead center at the same time. they are all of centered to tunr the crank. even if it is ever so slightely. over an entire turn/ rotation of the motor and as you continue with the shot there will then be a distribuion, but the very first entry is going to be one a single or, if timed correctly, two cylinders.

 

ok I can agree with you there. And ya I agree where a progresive shot would be the better route on an unbuilt motor