MyTA99

I'm looking at this kit (Harris Speed Works Sudden Impact Big Hit Dual Nozzle Wet Kit). Just wondering how big you can go. I'll be getting a new in-tank fuel pump of course.
http://www.harrisspeedworks.com/shop...cat=364&page=1

camaroextra

iTrader: (10)

Most people will say 150 shot, some have done a 200 progressive shot on the stock block successfully

my opinion on the 200 shot is that there is no room for any error, and your block is on borrowed time

sleeperstyle

iTrader: (4)

why is that?

camaroextra

iTrader: (10)

Iv just heard several stories about 200shot/stock short block combo #7 piston failures. A 200 shot is so close to the limit that the pistons can handle, it takes a lot less of a fuel pressure fluxuation or plug failure to cause detonation.

i do think it could be done safetly, but it would take a lot of experience to design and monitor a safe 200shot/stock motor system that would last long term.
key word=long term.

so im not saying its impossible, im just saying i wouldnt do it myself

sleeperstyle

iTrader: (4)

cool- thanks for the info !

brad8266

iTrader: (23)

Well heres my .02 It seems that when the manfuacturer rates these kits at a 150 shot, you wont get that gain at the wheels. I have a 150 shot and I actually see a gain of around 130Hp at the wheels, so a 200 shot rated may only get you 170Hp, which on a otherwise stock motor seems safe to me, provided the fuel system is up to par, colder plugs and window switch are used. A tune is also good to get. The stock block can handle a good deal of HP. You just dont want to get any detonation while using a shot that high or else it goes boom.

camaroextra

iTrader: (10)

very true. there are kits that actually dyno higher! depends what brand.

SSilverSSurfer

iTrader: (8)

thats whats ive seen...especially with the TNT kits which im going to get

MyTA99

Well whats the diff between
300 HP with 150 coming from cam, heads, headers with 150 shot
Vs.
300 HP coming from a 300 shot

MyTA99

Killed a 350 Z today it was great. The guy had happy tags. I know I'm off topic but I dont get many oppertunities because I drive it one a week.

brad8266

iTrader: (23)

Nothing, except the 300 shot will probably put out a lot more torque

camaroextra

iTrader: (10)

yeah torque spike

brad8266

iTrader: (23)

Are you thinking of nitrous lean spike?? I dont have a TQ spike, its high all through the rpm range.

camaroextra

iTrader: (10)

no i meant the sudden spike in torgue when the nitrous hits the cylinders

oange ss

iTrader: (50)

all juice motor wont last as long unless you use a progressive controller

MyTA99

So the cam, head with an occational 150 squeez will outlast the rare 300 squeez.
Anyone runig a 300 would probably use for track only and then have the 100-150 for the street.
I mean I'm a Nitrous Newbie but wouldn't a shot be safe as long as your fuel system is upto it.

sprydncamd ta

iTrader: (4)

if you want to run a big shot then i would consider making it either a dual stage or using a progressive controller but either way i would definetly look at hsw's stand alone fuel system as another safty precaution

MyTA99

Also what happens with the wet kit when you run out of juice and your just spraying extra fuel.

MyTA99

you've got to be running lower than 12's with a 250 shot.

brad8266

iTrader: (23)

Your AF goes way rich, it wont hurt anything though.