I plan on doing so on the bottle and was just wondering how will the stock bottom end will react/last on an 01' with bolt-ons.

 

Many h/c cam cars with spray make at least 500rwhp on stock bottom end and they have no problems b/c obviously they are not using the spray and getting that much power all the time.

If your going to use the spray moderately at the drags and for some occassionl street hot rodding you should be fine as far as the stock bottom end holidng up. If your going to be spraying thru a bottle every couple of days and beating the living crap out of the engine all thet time then i would think you will crap out sooner or later.If you want great piece of mind throw on some arp rod bolts and your set (assuming the N20 doesn't grenade another part of your engine).

MTI 427 C5 Roadster

 

Thanks for the advice, I will do that. I only plan on sprayin' on Sat nights, but I do plan on spraying 10lb thru it.

 

I'm about to do it with a D-1SC... <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

 

I'm putting down around 560 rwhp on a stock bottom end with no problems.

I run a TNT wet kit and in-line fuel pump on top of a heads/cam setup and my only advice would be to be cautious on the spray - make sure you've got plenty of fuel and just assume that if you spray all the time - that you're going to break something eventually!

 

Hey Will, I know how much you like the spray, so chech this out (my motor):

<img src="http://www.imagestation.com/picture/sraid40/p07c558467880141b1671872219940090/fcfec2dd.jpg" alt=" - " />

<img src="http://www.imagestation.com/picture/sraid40/p7e06fedf3a5b020e28ff82e79c5ea213/fcfec402.jpg" alt=" - " />

<img src="http://www.imagestation.com/picture/sraid40/p0ae155060513cfb145db5157002ee72c/fcfec403.jpg" alt=" - " />

<img src="http://www.imagestation.com/picture/sraid40/pb984e9cdd1c269dcdd2c933cad1e21c4/fcfec4c5.jpg" alt=" - " />

Nitrous on a stock motor will let go, its only a matter of time <img border="0" alt="[cry]" title="" src="graemlins/gr_cry.gif" />

<img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

 

We made 510rwhp (A4) with one of our club cars on a stock bottom end. H/C plus boost (VERY conservitive tune for future N2O use). 42.5lb Lucas injectors and tuning it was just fine for about 7,000 miles and about 25 low 11/high 10 second passes depending on tires (stock suspension T/A).

Then we added a small 50hp wet shot. That was Ok too for about 5 more passes in the mid 10 second range. Then the 50 shot gave way to a 200 wet shot. Needless to say, all was not well. Some melted pistons, and two 3X3 holes in the block. I figured that would happen though. Car had to be making over 650rwhp on the 200 shot; that's too much for a stock bottom end that's already seen some abuse.

The motor was just fine with 510rwhp on H/C + boost though, not so much as a hiccup. It was on an '02 motor. The N2O abuse on top of everything else is what ended up killing it...

Boost was acheived with an intercooled ATI P1SC head using a 15psi pulley making 7/8psi with 2.08 intake valves and no cats/ported stock exhuast manifolds.

 

Thanks for the input guys, I think I'll try it. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />