DPSJosh

Hey guys, i have an 89 crx with a stock ls motor. I was wondering what modifications i would need to run a shot higher than 75. I know a 75 shot is possible on a near stock motor (fuel pump, plugs, timing) but what would i need for a larger shot? Is anyone running a shot over 75 on a stock bottom end?

I guess my question is what is the largest shot the bottom end will handle, and what modifications are required.

These are the things i will have when i run a higher shot.
Fuel Pump
NGK Plugs (colder)
External coil with a new cap
new plug wires
retarded timing
93 octane
Anything else?

PS> Yes i've searched, but all the threads i've read are about 75 and under shots.

1700anddroping

well i have put well over 185 on a oem parts built ls/vtec car ran 6.94 in the 1/8.


nitrious does not blow motors up.the tuner does.make SURE YOU HAVE THE FUEL TO FEED THE FIRE and pull timing.


harv

MooreBoost

Bottle heater.
Window switch.
Fuel pressure safety switch.

Direct port would be nice.

97hb

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1700anddroping &raquo;</TD></TR><TR><TD CLASS="quote">ls/vtec car ran 6.94 in the 1/8.
</TD></TR></TABLE>

Typo??? Thats hella fast I ran 75 shot w/ just a walboro for 2 years no problem. I love the toughness of the LS motor

DPSJosh

Sweet, so you are saying the stock bottom end can hold a 185 shot?! If so, thats amazing. I was thinking like a 125 at max or something.

dirtyrican987

i think he just got lucky and if he did it agian he kill that motor... or hes not a stock bottom end.. i wouldnt recommend over the 75 with out some mods to the bottom end...

you may get lucky once or twice but nitrous is a lucky thing.. sometimes you have it sometimes you dont

MooreBoost

It's not luck at all.

It's knowing what your doing, or not.

bnut510

whoaaaa, 185 shot on a ls/vtec? are u crazy or what! im sure if u do it more than a few times, u can say goodbye to that motor. u running a direct port, plate, or fogger?

adseguy

All the people doubting this guy, how do you know what's right?...seriously have you tried it or just "heard". Cause some guy is now going to read this thread and read that it can't be done by people saying this .

The bottom end is not limited to how much you spray, but how much horsepower, and more importantly, torque you make. The bottom end can hold about 300whp fairly safely, turbos guys like us do it all the time. Like someone said as long as the tune is correct your engine can hold the power I mentioned

Nidius

Some guy made over 600 WHP on a stock sleeved block, and no one thinks they can put 300+ with N2O. LOL, fools....

That's why they will never be fast, that and the fact they drive honda's.

1700anddroping

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DPSJosh &raquo;</TD></TR><TR><TD CLASS="quote">Sweet, so you are saying the stock bottom end can hold a 185 shot?! If so, thats amazing. I was thinking like a 125 at max or something.</TD></TR></TABLE>

if the motor is tuned right..yes it will last....but will eventually wear your rings out.
if you decide to go w/nitrious......make sure you do a wet kit and a extra fuel pump t'd in would not hurt and will keep constant fuel pressure.


harv

1700anddroping

that motor is still running today...if you want some of it COME ON DOWN.....nitrious is not luck..........IF YOU DO NOT KNOW WHAT YOUR DOING W/IT IT WILL BLOW YOUR MOTOR TO PIECES.

we also have a b20 vtec w/just a block guard ....pistons and rods...STOCK VALVE TRAIN spraying over 200.......this customer drives this car every day and has sprayed i would say at least 20 bottles so far......


because you have had bad luck doesn't mean some one else will.


harv

KURUPTinc

Ls blocks are good. i have an ls/vtec with a 150 shot onlyg thing that i have are arias pistons. have been squeezing for two years only thing that blew were my rings thats because it ran too lean on a pull. 13.2 qt mile. oh yeah on a dry system.

1700anddroping

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bnut510 &raquo;</TD></TR><TR><TD CLASS="quote">whoaaaa, 185 shot on a ls/vtec? are u crazy or what! im sure if u do it more than a few times, u can say goodbye to that motor. u running a direct port, plate, or fogger?</TD></TR></TABLE>

this car is still running today......if you have the money to pay me to tear it down and show you every piece is oem STOCK......will that make you a beleaver


harv

1700anddroping

you either have to be running a ems..........or a **** load of fuel pressure. but 150 dry is PLAYING W/FIRE.I WOULD ALMOST BET YOU ARE RUNNING AT LEAST 2 FUEL PUMPS.....because one will not do it and hold constant fuel pressure.

harv

KURUPTinc

stock fuel pump. 16 year old fuel pump

1700anddroping

yeah and i am super man........

Ti3d in

Anyone have experience with running say a 50 shot and more with like 11:1 compression? Has anyone sprayed with that compression on pump?

1700anddroping

you will be fine.

B6tPoweredMx3

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ti3d in &raquo;</TD></TR><TR><TD CLASS="quote">Anyone have experience with running say a 50 shot and more with like 11:1 compression? Has anyone sprayed with that compression on pump?</TD></TR></TABLE>

Spray away, Not sure what your going to use, but i would recomend a wet setup, or even better a direct port.

Phase Change Racing

*sigh* so many magazine mechanics out there. Bad information about Nitrous is like an STD, easy to get, easy to pass on and the "cure" only helps you out if you realize you have the probelm in the first place lol. Do your research, question everything, and don't be affraid to experiment. And don't be afraid to talk to some of us dumbestic guys that have been using nitrous since back when the only fast Honda came on 2 wheels.

You will find that the "limit" of nitrous you can run (with a good tune) on a stock engine is going to be very close to the limit (with regard to power) while running NA or forced induction. Every form of making power has its advantages and drawbacks but when its all said and done Power is power. Ha, I betcha I get flamed by the turbo boys for that comment.

wolfsburg2

i think you guys are assuming he's running a single stage or direct port straight 185 shot. if you run it progressive you can lessen the harm to the motor. spray less down low, and spray more when the motor is spinning free up top. air is air. people have run 400+whp on bone stock motors. the same can be done with nitrous. the key is having a capable fuel and ignition set-up, a progresisve controller and an actual tune for the juice

crucian

Ive been trying to get some of my friends to run or atleast try nitrous cause they are always talking about being quick but no big money to spend. But they are all scared to run nitrous because of all the crap they hear about nitrous only blows your motor. Its all about being smart about what you do. I ran nitrous for a while and never had a problem with my motor. Did a compression and leakdown test a year after and results were like the engine was brand new. I couldnt believe it myself cause I was also believing all the negative nitrous stories at the time. Oh another thing, I missed shift many times while spraying but that is why I had a window switch. Like I said, it's all about being smart with what you plan to do.