Gentleman,
I know that this has been discussed prior. However I am curious to know if anyone has tried using 150-200hp N2O? I'll preface this by saying that if supercharging provides 150 extra horses at the wheel, the reciprocating assembly certainly is subjected to more stress via the pulleys etc...i.e. to drive the supercharger requires X amount of horsepower. So if the Endurance engine can handle an extra 150 horse via the supercharger, what would be the harm in going with a 200 horse shot of nitrous?? If a tuner can keep the engine from running lean I don't see a problem.
Interestingly I have not seen any data on whether or not the supercharger kit uses low compression pistons. To force induct an engine that already has a good compression ratio seems strange to me. Most blower engines that are designed for performance and longevity seem to run 8:1 or similar compression ratios. I guess we will wait and see....bye the bye I think that turbocharging one of these engines would be the way to go. Lots of juice without the expense of driving a supercharger...go with 8 or 8.5:1 pistons, big huge injectors, etc, and boost the hell out of it...Got your Hemi eater...now to figure a way to put all that power to the ground.
Regards,
Sam
p.s.
perhaps Nissan will do us all a favor and make a big mean turbo diesel....now that would be FUN.

I haven't. With the stock cast pistons I probably never will.

I haven't. With the stock cast pistons I probably never will.

Head, didn't you say you tried running bigger jets than your normal 50's and didn't see any gain???

I tried 75hp and 100 hp and didn't get anything but that was with the stock spark plugs. I'm going to try to add more soon with a little help from Cold Fusion. I also have some new lines coming in since the ones I have might have a kink in them.

I tried 75hp and 100 hp and didn't get anything but that was with the stock spark plugs. I'm going to try to add more soon with a little help from Cold Fusion. I also have some new lines coming in since the ones I have might have a kink in them.

I gotcha. I have heard of this kind of thing before though. Some motors just don't respond well after a certain amount of Nitrous. Could be the stock tuning trying to protect the engine, or whatever. 50hp will be fine with me. 50hp on 5.6L is nothing in the way of stress on the motor and with the gains your seeing it should insure the win on most typically modded competitors. I've learned, no matter what you build, there's always 5 people faster than you and they always show up at the track on the same day as you.

I tried 75hp and 100 hp and didn't get anything but that was with the stock spark plugs. I'm going to try to add more soon with a little help from Cold Fusion. I also have some new lines coming in since the ones I have might have a kink in them.

So you've been running the 50hp jets on the stock plugs? When you pull your #1 after a bottle run does it look alright? No metal specs on the porcelain, no signs of engine damage? I would think a couple heat ranges colder might get the computer to leave some timing in the mix on a bottle run. I will be interested to hear the results.

yes
yes
I have a range colder iridium plugs in there now to try. Gaps have been closed .004" from the stock .043".

Gentleman,
All very interesting to me. I guess the concern with cast pistons is if one were to have a lean condition, it could lead to shall we say catastrophic failure. Which is why I have so many questions about the SC kit for these engines...Guess we'll have to wait and see what develops. Just thinking along the lines of the IHRA Pro Mods..they have SC and N2O cars, and they are pretty evenly split. Head et al in your opine which N2O is system is best with regard to performance and fail safe systems that help protect an engine in case a lean condition were to develop? For example a fuel pressure monitor that shuts the system down if lower than required pressure occurs at the injector or at the fuel solenoid? Heading to Bandimere this weekend....we'll see how it goes.
Regards,
Sam

Gentleman,
All very interesting to me. I guess the concern with cast pistons is if one were to have a lean condition, it could lead to shall we say catastrophic failure. Which is why I have so many questions about the SC kit for these engines...Guess we'll have to wait and see what develops. Just thinking along the lines of the IHRA Pro Mods..they have SC and N2O cars, and they are pretty evenly split. Head et al in your opine which N2O is system is best with regard to performance and fail safe systems that help protect an engine in case a lean condition were to develop? For example a fuel pressure monitor that shuts the system down if lower than required pressure occurs at the injector or at the fuel solenoid? Heading to Bandimere this weekend....we'll see how it goes.
Regards,
Sam

I have to start off by saying, I have no N2O experience with the Titan, but I do on three other cars. IMHO, a properly setup 50hp shot on a 5.6L V8 is very very safe. I ran a 50hp shot on a 1.6L 4 Banger and ran 35+ bottles through it and never even a hiccup. The cast pistons are not ideal for any kind of forced induction but reasonable boost/injection levels should be no problema. A fuel pressure safety switch is always a good idea but again, IMHO, even if you were to go lean on a 50hp shot (meaning fuel solenoid fails) with 5.6L of displacement you probably still won't grenade anything.

Funny story - When I first installed nitrous on a little 4 banger I had at the time I knew very little about it compared to now. Well I reversed the jets in the nozzle (not knowing any better) so I was basically lean since the fuel jets are always bigger than the N2O. I hit the button for the first time and I hear a loud explosion under the hood, I let off the gas, and pulled to the shoulder of the road. I was sh!tting bricks and when I popped the hood I found my filter had been blown off the end of the tube. I made a call to NOS right then and there and that's when they told me I had the jets reversed. I swapped them, put the filter back on, and it was fun times for 35+ bottles. I got lucky obviously but if I had been running 125hp shot, things would have probably been different.

Bottom line, use commonsense and keep yourself in the safety factory. NOS claims you can run 125hp shot on a stock EFI V8. A 50hp shot is nothing.

On the subject of nitrous kits, I really don't like "Kits". I find I never use all the parts and there are always parts not in the kit I need. I plan to run a 50hp kit on my Titan like TheHead and I plan to piece mine together.

Good Luck.

Gentleman,
Head et al in your opine which N2O is system is best with regard to performance and fail safe systems that help protect an engine in case a lean condition were to develop? For example a fuel pressure monitor that shuts the system down if lower than required pressure occurs at the injector or at the fuel solenoid?


Absolute safest way to go? Well, I guess that would be to have a Hobbs switch so if fuel pressure dropped it would shut the system off. Some kind of a/f meter or gauge that has a visible and audible alarm would also be good in the even that the nitrous solenoid sticks open. Window switches are good safties.

There's a lot of things you could do to a nitrous setup to make it "safer". I don't run many safeties on my system because I will either let go of the button or just reach up and turn the motor off. I've had to do that on a few occassions in the past - turn the engine off due to some problems. Just having the cognizance to reach up and shut it off is the best safety, to me. I may pay for that at some point but any gauges or alarms you have setup will react as fast as the car itself when you feel it running different.

On the same topic, what's the general consensus when it comes to superchargering? I want one soooooo bad, I'm not sure that I'll be able to afford one when they are finally offered but I will surely try. My thoughts are 6lbs. of boost should be plenty safe with the cast pistons in the Endurance, maybe even 8 if there is a way to add a fuel enrichment line. I'm interested to hear anyone elses opinions on the safety and reliability of the prospects of S/C and what boost levels will be reasonable.

I would say 6lb without an intercooler of some sort would be the most reliable.

After todays outing to the track I think I am going to go with a 100hp N2O system. Just need to figure which components work best etc. Any input would be greatly appreciated. Bye the way with regard to using high levels of N2O I am wondering if the the aftermarket exhaust systems flow enough to support the amount of additional horsepower that comes from using them? I can't wait until my Banks gets here.

I would be very tempted to go with 150hp set up at this altitude because I don't have as much cylinder pressure to work with. On a side note what does it cost to refill a N2O bottle?
Regards,
Sam

Any number of universal wet kits are available. You just have to tap into the fuel system.

It costs between $30-$40 to fill a bottle in Houston, TX.

Head is your bottle 10 or lbs? I fyou get an oppt shoot me a PM.
Thanks,
Sam

10#

PM sent.

Gentleman,
All very interesting to me. I guess the concern with cast pistons is if one were to have a lean condition, it could lead to shall we say catastrophic failure. Which is why I have so many questions about the SC kit for these engines...Guess we'll have to wait and see what develops. Just thinking along the lines of the IHRA Pro Mods..they have SC and N2O cars, and they are pretty evenly split. Head et al in your opine which N2O is system is best with regard to performance and fail safe systems that help protect an engine in case a lean condition were to develop? For example a fuel pressure monitor that shuts the system down if lower than required pressure occurs at the injector or at the fuel solenoid? Heading to Bandimere this weekend....we'll see how it goes.
Regards,
Sam

I have to start off by saying, I have no N2O experience with the Titan, but I do on three other cars. IMHO, a properly setup 50hp shot on a 5.6L V8 is very very safe. I ran a 50hp shot on a 1.6L 4 Banger and ran 35+ bottles through it and never even a hiccup. The cast pistons are not ideal for any kind of forced induction but reasonable boost/injection levels should be no problema. A fuel pressure safety switch is always a good idea but again, IMHO, even if you were to go lean on a 50hp shot (meaning fuel solenoid fails) with 5.6L of displacement you probably still won't grenade anything.

Funny story - When I first installed nitrous on a little 4 banger I had at the time I knew very little about it compared to now. Well I reversed the jets in the nozzle (not knowing any better) so I was basically lean since the fuel jets are always bigger than the N2O. I hit the button for the first time and I hear a loud explosion under the hood, I let off the gas, and pulled to the shoulder of the road. I was sh!tting bricks and when I popped the hood I found my filter had been blown off the end of the tube. I made a call to NOS right then and there and that's when they told me I had the jets reversed. I swapped them, put the filter back on, and it was fun times for 35+ bottles. I got lucky obviously but if I had been running 125hp shot, things would have probably been different.

Bottom line, use commonsense and keep yourself in the safety factory. NOS claims you can run 125hp shot on a stock EFI V8. A 50hp shot is nothing.

On the subject of nitrous kits, I really don't like "Kits". I find I never use all the parts and there are always parts not in the kit I need. I plan to run a 50hp kit on my Titan like TheHead and I plan to piece mine together.

Good Luck.

Correction! Sorry, sorry, sorry . . . Fuel jets are always smaller in size than N2O jets. I pulled out "The File" (I keep one on every car I've ever owned, with few exceptions) and was reviewing some of the diagrams I had and realized my N20 jets were .035" and fuel was .020". Basically a 55 base horsepower kit. I remember I had the jets reversed which would have meant I was fat on the fuel side and puddled the fuel which was the cause of my intake backfire. It was 10 years ago and the memory is a little off. :) I even found a receipt for a few bottle fills at $26.50 for a 10lb.