Nitrous with Hyperutechnic pistons

[Tamer]

Have anyone of you ppl used nitrous on an engine with twisted wedge heads, and hyperutechnic pistons??? If you goto user rides Im "Tamer" take a look at my setup. Im really scared to use the **** when I get my car back together. I dont want to take the chance of detonating and having the piston crumble and cracking my alluminum heads

[Ron1]

I used N2O with TFS heads and cast pistons. Went fine for a couple of years. The I got greedy at the track one day, went to 200 horse shot. GOODBYE. Never did find that one piston. If you stay at around 100-125 you should be fine. Nitrous will also not crack the head...it will look like someone took a blow torch to it, and melted it. Nice thing about alum. heads..they can easily be fixed.

Ron

[Tamer]

but thats the thing there not cast pistons

theres a difference between cast forged and hyperutechnic


forged is forged

cast is poured

hyperutechnic is poured with 18% silicone

[Ron1]

Let me read you a qoute from "How to Install and Use Nitrous" by Joe Pettitt. He's been around for years, and writes books for the SA design series of books. This is why I said you better take it easy, and be careful every thing is correct.

The question: Should you use Hyperuetectic Pistons in your Nitrous Engine?

The answer: You do not want to use hyperuetectic pistons in a nitrous engine. They will take a lot of pressure, and you can stand a mountain on them, and they will not break under the weight, but the minute you ring them with the frequency that nitrous causes when it detonates, they shatter like glass. They break, they do not melt.

It also has to do with the way the rings are set up on the pistons and the land area between the rings and how they are each gapped. And the plugs that are used and what kind of electrodes to use, and why to stay away from platinum plugs.

Its a good book to have on your shelf, if you want to run the N2O.


Just FYI,

Ron

[mike72678]

hypereutectic pistons are stronger than cast pistons and they will hold up better than cast pistons will for nitrous applications , although forged is the best. For what you are doing , you will be just fine running a 100 shot of nitrous with the hypereutectic pistons and you will not have to worry about your pistons "shattering like glass" as long as you have a properly tuned motor .

[moc]

This has been a very big ( well it's not as good as before debate ) for , since 93 year ! Ford did not do this ( I will call it a upgrade ) for nothing .. You need to more reading on the subject . (wich means better than anything ) on the Internet . Trust me ..your okay with what you want to do .

[Ron1]

And that's exactly what I said in my first reply to your question. If you stay at a 100-125 HP shot you will be OK. Make sure you pull out the 2 degrees per 50 hp, you have a good supply of fuel and the right octane, install a Hobbs switch to monitor fuel pressure (that if you lose it for any reason it shuts off the N2O) and you will be fine. And like moc said, read up on the subject.

Now go and kick some Chevy butt. I think we can all agree on that.

Ron

[Tamer]

Now if im running the tfs TW heads and your supposed to run 18* timing does that mean that I hould be running 14* for the nitrous or should I run 8*??????

[Coupe50h]

well tamer, we know im no expert from the other thread lol, but i would run 8-9*, we ran a friends 347 on the juice like that 8* i think it was, on a 175 shot and tfs heads, went pass after pass without any trouble, he did one time forget to put some vp fuel in and lost a head gasket, motor 10:5:1+pump gas+n20=something going to break....
peace...

[Ron1]

All manufacturers seem to recommend 2 degrees for every 50 HP of N2O you run. For example, my motor performed its best at 34 degrees total timing. So, when I run a 150 shot of N2O, on launch, the MSD is programmed to pull away 6 degrees, until I lift and open the WOT switch. Then it goes back to normal. If you are not running an MSD timing control module, like the 8782, pull out 4 degrees for your 100 horse shot and go. It will run a bit worse on the street, but at least you are safe.

Ron

[mike72678]

The NX kits from nitrous express reccomend you do not retard timing at all! they are a wet kit though .

[Ron1]

Here is what Holley recommends..I use 2 degrees per 50. Pretty simple rule. Lean makes HP, but I am not going to run near the edge.
http://www.holley.com/HiOctn/TechSer.../NOSTech4.html


Ron

BTW Mike, whose system are you running? And how big a shot?

[Tamer]

Im running the nitrous works 125 non adjustable wet shot throttle plate setup

[Ron1]

Just to satisfy my own curiousty, I sent an e-mail to NOS and asked about the hypers...
Here is their answer:

I would not run more than 100hp on that engine.

NOS tech dept.

Ron

[Tamer]

hmmmm my buddy ran a 150 dry shot on a stock 93 longblock for a year. and had a powerdyne bd-11 supercharger on it before that too

[Ron1]

Just out of curiousity...send one to NX, and Nitrous Works. See what they say..

Ron

[Kamaro Killer]

a 93 with a 6 lb powerdyne s/c. I have 251 HP and 324 lb of TQ. My engine has 103K on it and is doing fine!

[ChunkFunky]

you only have 250HP with a 6lb super charger?
-as

[Kamaro Killer]

I'm really holding the s/c back with the stock MAF, stock injectors, stock TB & stock intake. My dyno chart shows that I'm having problems with the spark being blown out too.

[ChunkFunky]

I hope you figure it out.... I'm by no means a supercahrger knowledgable guy, but with a theorhetic 225 HP stock motor you should be atleast 275-300.
-as