zraffz

iTrader: (1)

It's almost time to send the motor to the machine shop which unfortunately means I have to finally decide how much nitrous to run.
I'm putting together a 357; I have Probe SRS pistons (details below), Callies Compstar h-beam rods (5.7"), an eagle 4340 crank (3.48"), and JE HNS (the same top ring as the Hell Fire rings) rings.
Probe 12334-040 specifications:
.240" top ring land from deck
.240" deck thickness
4cc fly-cuts
2618 material

I am running a pretty aggressive cam (236/244 @ .050", .608"/.608" 110 LSA) with Trickflow 185cc GenX heads behind a 3,600ish converter. My near future plans are an NX direct port kit. I will be running a dedicated fuel system with C16 race fuel to mix with the nitrous (the gas tank will remain full of 93 octane pump fuel).

This car will see minimal street time, blow-by is not a concern. What's the largest shot I should spray? (I have my mind pretty much set on a 250 shot but I'm leaning towards a 300). Really want to see 9's in the 1/4! Any advice/help/comments are greatly appreciated.

05HD

My personal opinion? 300 is a bit much for a single stage unless your car is a dog on motor or you have a progressive controller.

nitrous2fast

iTrader: (2)

Do you have any suspension work??? You could spray all the nitrous you want but if you can't spray till the 1/8 cause you can't hook then why???

If you have good suspension then a 250 should get you into the 9's.

bowtienut

iTrader: (1)

I agree with those comments. If 9's is your goal, there's no reason whatsoever to plan for more than a 250 shot. In fact, if you get the rest of the car right, it will easily go nines on a 200.

quik95lt1

iTrader: (7)

everytime i see a post like this it makes me start to think about buying nitrous pistons.....

bowtienut

iTrader: (1)

lol......I gave it the benefit of the doubt and thought that just maybe he's trying to decide on the top ring gap

quik95lt1

iTrader: (7)

thats what im assuming......

nitrous2fast

iTrader: (2)

me also... but i would gap them diff 300 shot vs 200...

You could also have the pistons coated.... and run less gap....

zraffz

iTrader: (1)

I am trying to figure out how much nitrous I want to run so the shop can file my rings accordingly.

I've got just about everything for the motor, next I'm saving for my trans and torque converter. Got the money aside for a S60 but that's the last thing I want to buy.

Suspension is Spohn control arms & relocation brackets, QA1 coil overs in the rear, subframe connectors. Plan on running something along a 26-27x10.5 slick.