How much of a shot can i put on an crower stroked to 2.1l b18 with 10.6 compression ratio? Everything is forged so.....
Will it be a must to have a piggyback setup too?

 

depends on how safe u want to be, u got new rods also? a piggy back system isnt necessary but it always helps, and id suggest running a better ignition system to get a greater spark into the engine, but running a 55 shot is realistic a 75 shot extreme and more dangerous but entirely possible with a nicely reinforced bottom end as long as u dont wail on it too much.

 

Yeah, i say around a 55..

 

yes, my bottom end is entirely forged...
the machine shop had to grind into my sleeves so my rod's would fit properly..

 

the c/r isn't that high, and since you have a fully built forged bottom end sprayin a 100 shot would be nothing to sweat. i'm sprayin a 75 shot on a stock bottom 10.2:1. i've known several people that have sprayed a 75 shot (and 1 that sprayed 100) on their type r's. their c/r is higher than what you have. stock valves are usually the first part that ends up breaking on a motor that sees a lot of n2o. that's why many that rebuild the head use s/s. you have to make sure that you have enough fuel for a high shot and retard timing accordingly. it would be a waste of forged internals to only spray a 55 shot. i personally am going to rebuild my bottom end of my b16 with forged 11:1 and spray a 100 shot on it. anyhow, goodluck.

 

100 seems pretty high to me, unless youve got a really nicely built motor its normally not suggested that you shoot more than 45-50% ur total n/a hp but hey in the end its completely up to you buddy

 

Go with a direct port kit. With forged internals you can EASILY spray more than 100 shot. I've known people to spray 125+ on a stock GSR/LS motor. It's all in the tuning. Piggyback ecu's are no good on the bottle, since they are generally heavy in timing. You're gonna need an inline fuel pump for when the nitrous is flowing, and you might want an aftermarket ignition if you don't already have one. I wouldn't hesitate to put a good sized shot on it, after all you built the motor right for a reason. Take the advice from people who know nitrous.

 

that's why i said spray a 100-125 shot. he has a built forged bottom end.

 

Of course if it was me, I would probably put it on a 200 shot

 

push it to the limit:thumbup: