I am currently building a 427 ls1 block with darton sleeves all forged bottom end billet main caps arp studs solid roller itb intake manifold bs3 etc. My original plan was to have a high hp N/A and then add a large amount of nitrous in the future. But from what I have been reading people think that a 300 shot is pushing it. Why is it that there are alot of turbo cars that can make lots of power with the ls1 block but the nitrous is limited. I also plan on running a separate fuel cell with race gas for the nitrous. Any help and info is appreciated.

 

I'm not sure, maybe just being overly cautious (usually the advice I give out, since I don't want to be responsible for someone's property like that). IIRC the guys from CMotorsports were blasting 300shot on stock bottom, if not them, I know someone did it a few times. It is weird how the FI guys are banging away over 1,000rwhp and we havent been. Might be more of an issue since nitrous is all or none, unless progressively controlled? Not sure, but I wouldn't mind running more than a wimpy 300 on mine Hopefully not so long from now either, just need to get it back to the mainland and start racing again.

 

300 aint nothing much on a fully built/tuned motor, **** my 150 aint **** on my stock LS1 with boltons and i am sure i would be fine with a 200 shot.

Who told you this anyway?? I think there arent 1000HP nitrous engines out there cause guys are hitting 9's with not nearly that much power on nitrous. Nitrous makes massive torque, which is what really gets you going.

 

FI makes more HP on the dyno.
N2O gets you down the track quicker.

So the question is dyno sheet? or time-slip?

 

I have to disagree as far as vehicles on this site White... the top quickest on this site are FI. Quickest Nitrous cars are two in the 8's and several in the 9's (more so than the FI probably). But, again, on this site, and yes I know there is a whole world outside of what happens on LS1Tech...I just dont hear a lot about it. To name a couple, Harlan TT, Mike Brown (TT and T), Ronnie Duke (ATI SC) and there are more outtrapping our Bottle Fed Babies. Just how long will it be before someone takes down a clean mid-low 8sec slip? I'd be happy getting into the 9's first, then I'll work out what it will take to get that next second

 

i'm going to have to go out on a limb here, but the big boys that can afford to be running turbo's and such are the ones that can shell out 30k for a motor setup, not including the rest of the car...as for nitrous is more for your average enthusist budget. and i'm not so sure as to the people here that are running nitrous are wanting to spend huge money on a car. like it's said over in the FI section, turbo you pay for it all upfront, nitrous you pay as you go.

 

i never looked at nitrous as less expensive than turbo or superchargers or built motors. too me its all good and i do it all, so...............keep the drugs a flowin

 

+1 if you go nitrous you spend less up front($300-$1200+) for nitrous setups. depending on how much you spray it will be cheaper in the long run to stay with the spray or go FI. if your a guy who dumps 2 bottles a weekend($6.00 per lb hawaii) you could find it cheaper to go FI. either way to make 650+rwhp youll be upgrading the same parts(motor, tranny, clutch, rear, fuel...)

i chose nitrous because i can be fast today while i save for a set of twins and may even keep it after i get them to.

 

Chris, so true on outrageous prices for nitrous over here... Speaking of, I need to talk to my filler and see about shipping my cylinder to Arizona with me when I leave, since I got it for free, might as well keep it with me Setup my own refill station someday. I know if your connected in Hawaii you can get it for $3 a lb., too bad I'm not on the "in" like that

 

yea i need to stop in at the AIR/GAS hawaii and see if i can rent my own cylinder. if i can get it for under $3 a lb or close to i will be able to pick up a pump and fill a few guys i know and maybe some more. maybe convince them to go in on a pump and keep it at thier shop with a master tank. some guys i spoke with get hooked up at napa with $5 a lb.... i guess the crazy price keeps me from putting a full bottle in daily

 

That is self-incrimination right there! Rolling around w/o a full bottle, OMG, are you feeling ill? j/k. If you know someone at AGH you might get it a touch cheaper, but doubt you'll be that close to $3, GL

 

Im the only fast street car here... actually its kind of sad ive already beat all the "regulars" before the spray... we had one guy(Mike) come out with his c6z06 and it wasnt pretty so now im spraying my bottle is always got some in it. went out last night with about 4lbs to empty the bottle and got it filled this morning for some track time saturday.

 

$2.75 per pound here

 

I was referring to FI cars needing 1000+ hp to run the same ET's as a 700hp N2O car,
and yes I think FI costs about 5X as much money at that level.

The comparison I was talking about is more along the lines of comparing equal HP levels between N2O cars and FI cars. I do realize FI cars are generally making much more HP overall.

I also think that since N2O is more for the budget minded racer, the nitrous users tend to be a little more cautious about turning the power up to those levels. Others I think may be more shy about very big power levels with N2O because of the massive amount of torque that gets applied instantly.

 

I was wondering this myself, and after some research it seems to me that since the burn rate of the nitrous oxide/gas mixture is greater than that of air/gas this creates higher cylinder pressures earlier in the piston's downward stroke therefore making it harder on parts and parts reliability is what limits us all.

 

Well i talked to a guy at a local track this wekend with a billt 422 that has over 300 n2o passes on it and he was spraying 125 in first and 400 from second on. This was on an ls2 block so i know for sure that you can spray more than 300. He didnt have any progressive controller either.

 

white, that makes much more sense, I agree.

 

yeah he said what i was trying to say, i cant explain myself well lol

 

Thanks for all your help your all making me more confident in pursuing higher levels of power with nitrous. I am planning on using a progressive controler. If anybody has any ideas that can help improve my motor to handle as much nitrous as possible. Im also using swaintech coatings throughout the motor so that should help some also.

 

I'de make sure you get the ring gaps filed to where they should be and make sure there is plenty pistin to wall clearence.