Bottom End Buildup For Nitrous???

Would this bottom end stay together for a 150 hp shot??

66 200 block .030-.040 over, 66 forged remaned rods, stock remaned crank, complete balanced rotating assy, ARP rod bolts & ARP main studs, FSPP forged pistons, FSPP timing chain & gears, oil pan & balancer.

See any problems with it??

Later,

Doug

Sure...why not...

Sometimes Destructive testing is the best...If you try it, and it doesn't work, then we'll definitely know.

You can always throw a junk stock block in there and try it out. If it holds, a built block should. I think someone around here (ImportKiller?) ran 100 shot with no issues on an otherwise stock block at the time.

Slade

I kinda want to get a junk stock block and try a big shot on it but it would be wasted on my 175 series tires! That and my car is in the paint shop

As long as it doesn't detonate
Dan was using 100 hp shot on his 4 main block

Alex

So you're talking 150 hp plus 180 - that's 330 hp. No problem. For a full 1/4 mile loosen the end gaps on the rings. I have never had a crank shaft break and I have abused it severly. The rods will bend - but not break. You're fine with these horsepower levels. .030 would be better than .040.

Doug, here are articles that might shed some light on this subject....

http://www.hotrod.com/techarticles/42580/
(engine building for nitrous)

http://www.speedomotive.com/Building Tips.htm
(engine building tips)

http://www.carcraft.com/techarticles/77899/index.html
(piston ring tech)

You could swing by our inline cousins at Slant Six I know there are some people there that have used nitrous on their sixes.http://www.dutra.org/pictures/engine/dutra-cuda-engine/nos-test.htm


On a side note, most magazines and nitrous kit manufacturers establish 100hp shot as the threshold of "stock" fuel systems, anything higher than that (they claim) you need a dedicated fuel system, that ONLY feeds the fuel solenoid.

Also I would recommend that if you are serious about this you better use a multiple nozzle system. NOS sells a kit specifically for sixers, BUT ever since I got my Edelbrock kit I've like the quality of their parts much better, the brackets, the solenoids, braided fuel and nitrous lines, SS jets, and a good wiring kit.

Anyways Doug, let me know how it goes alright?

Alex

Alex,

Do you have the link for the NOS 6 cylinder kit??

Theres a couple of different ways I've thought of running the nitrous....either a plate system like Alex has, or installing a kit that has the nozzles sitting right on top of the carb. No fancy plates to fab up or having to worry about carb to hood clearance issues....

Another thought is to experiement with the motor I have with small shots (50 hp) then once I get the bugs worked out, build another motor to handle a big shot like in my original post.

Money is not a big object....but I dont want to piss it away on grenaded motors either!

Thanks for the ideas!!

Doug

Sportsman Fogger System
part # NOS-05040NOS ($590 @ Summit)



Alex

That's the system I have on my six. I have never tried a plate system on a six. The seprate nozzles have work flawless for me 8). It also depends on what you are doing with the system. I changed a few thing to custom taylor it to my needs.

Steven

MandarinaRacing":2lclu8wb said:

As long as it doesn't detonate
Dan was using 100 hp shot on his 4 main block

Alex

Click to expand...

Alex is right on with that! Make sure it dose not rattle and you will be fine. The good pistons will give you a LOT more room for error if it does though. I sprayed 100 on my 7 main with the 2.3 cast pistons for a long time with no trouble at all. The '64 4 main is the one in my car now and it is 100% stock(rod bolts and all) and is has taken 12 psi of boost and a 50 shot!!!! If that old thing can take that I would think ANY 7 main should go a long long ways before you have any parts fail.

BTW Doug what are you talking forged 66 rods?? Something I am missing???

Dan