Some say a 409ci Iron is the biggest you want to go for a huge shot of nitrous.. What do you guys say? I would like to be able to spin the car up to 6500rpm, but if 6krpm is going to be the max for a huge motor then so be it..

 

I'd say you can spray a 427 as long as the pistons and sleeves are ready for it...

 

Why am I worrying about the sleeves on a iron block?

 

lol don't play around just run an open line. seriously though, do you have a bad *** fuel system or not?

 

I plan on testing to see how much I can throw at my new 408 when it's done. Figure with a perfect fuel system, and extremely conservative timing, I can throw 400 on it.

 

I would not bore more than .030 over for big shots Vince. Fuel delivery and tuning are the keys. You can run a 500-shot if you get it set up right. Don't expect to run a stock fuel system ot 28 degrees of timing though

 

Todd I have upgraded my fuel system and I should be good up to 750rwhp right now.. I plan to add a little more just so I have that safety net. When I really think about it I really do not need anything more than 650rwhp to do what I want to do, but you always have that special guy coming from Texas or where ever that requires you to release that second stage on them..

 

Just a FYI.. This is not just about nitrous. It is about the overall durability of the iron block.. You could just as easily put this in the FI section.

 

do an independant low pressure fuel system... direct port. or you are going to have tuning nightmares...

Im running a NOS Pro Race Fogger System which is normally good for 300-600 hp. But I went with NOSzels instead of regulare foggers... i run a Jaz Fuel Cell up front, Holley Black Pump and Aeromotive Regulator... just adjust the fuel pressure to 6psi for what type of jets ur running and go from there... gravey.

My buddy runs same setup but with regular foggers on his LT1 355, 250 shot all the time... no probs!

 

My future plans are to go direct port, but so far my current nitrous setup is working fine..

 

Vince, are you still running stock injectors? If so, time to change them to at least 36'ers for N/A and the nitrous. Also, I do not think your intank pump is going to be enough. To be safe I would also install an inline pump as well. The guys here running over 600 rwhp were losing pressure with the Walbro alone, most install a BBK inline for safety. I can almost promise that pump isn't going to handle anything over 650 rwhp.

Like Todd said, block thickness, fuel delivery, and TUNING are going to the key. With everything in-line, you should have no problems spraying a 350 shot SAFELY. With a 409 motor making ~500 rwhp, anything over a 350 shot would just be ignorant IMO.

Get off the damn internet and get this motor started


josh

 

Iron block = BIG SHOT!

 

Josh I have more than just a intank.. Getting bigger injectors is a gimme.. C'mon, who do you think I am? Country Boy I am going to do everything right this time around. All the way down to the dual springs..

 

I used the new Crane duals on my new Absolute heads and no float at 6500 rpm with .600 lift.

 

hehe...

good thread.

 

Cool. Quit talking about it and DO IT.

 

I am working on it MAN!!

 

If the supercharger stuff doesn't work out, I will be venturing this way soon....200DP to start...that should give it that extra "jolt"

 

I would love to go boost, but after reading all of you guys woes Bos.. I think I better stick to something less complicated.. Even though I am on my 2nd NA motor I still think I would have spent more money if I had went the FI route..

 

Very good Vince! I taught him that