1999TransamWs6

iTrader: (21)

Looking to doing a iron 408 with billet crank, billet rods and diamond nitrous pistons with ETP 265 heads and a huge cam. 12:1 CR or 13:1 (not shure) How much spray do you think something like this can handle?

Reject

iTrader: (24)

i say keep pushing your luck until it craps out!

rosm187

dual stage 200/200.

Loudmouth LS1

iTrader: (10)

As much as you want if you can keep the heads down!

CAT3

iTrader: (9)

Is your huge cam ground to give lower torque, or higher? Will it bleed off a lot of cylinder pressure mid-to high rpm? The compression is good, heads will flow like crazy (sometimes I think I should have went larger runners myself...) but the cam needs to be good for nitrous, if it is then smaller 200- shots would do you good, whereas a cam grind not taking into account the juice, you may want to go larger.




This opinion is mine and is reflective of a safe approach.

1999TransamWs6

iTrader: (21)

I was thinking of going with the dual stage idea. I know if I do that the motor will definately live longer. I may go with a solid roller that way cam selection can be exactly what I want without valve flot problems. I will likely go with a cam that will be sick with nitrous that wau I dont have to spray alot to get the same performance. Would a huge cam with a large split be good for this? Any suggestions on the cam? should I go ahead and o-ring the motor/heads and go with larger head studs? Thanks guys.

CAT3

iTrader: (9)

I had my cam ground thru Ed Curtis, EDC on here. He was very helpful, sent the cam request order form via email, and had the cam ground w/ 2 days and shipped immediately upon rec' my $. My request was for a cam that could eclipse 400rwhp in an Auto, 3300lb, streetable (I'm pretty forgiving), AFR 225 headed (went with ETP 225's though) 347ci forged, 9" with 3.50's. I havent sprayed too much on it, mostly a few 140shots, but she dropped from 11.57 to 10.61 worse 60' oh well, so theres more left in the combo.

1999TransamWs6

iTrader: (21)

Any other opinions? I know some other people have to have an idea on this.

Robert56

iTrader: (2)

I also vote for the dual stage. I think you could easly do a 300 shot (or more). Amount in first stage, depends on how your hooking. I would start out smallish and work the tune as you go up, as you prob know, the tune needs to be pretty good at the higher levels. Head studs, yea, as Loudmouth said, keeping the heads down really is the limiting factor. As for cam, well there are many opinions, but one specific for your needs as Cat has done would be the best approach. Have any ideas yet on what approach or style nitrous set-up you would use?
Robert

1999TransamWs6

iTrader: (21)

Most likely a direct port. stand alone fuel system. Also Im going to do a solid roller most likely if it will make the most power.

ls1mongrel

iTrader: (32)

150/150 or 200/200 would do good on that motor !

LS1Queen

iTrader: (1)

I have a 383 with 5.3 heads 12.2 compression on 93 octain and have ran a 100shot wet off the line and another 250 direct port without problems when we get around to putting on the new heads and larger studs we will be doing a 200/200 the direct port is on a standalone with 116 nos fuel.

krazy4

iTrader: (5)

250-300 shot with a standalone fuel system

next

iTrader: (9)

Nobody has asked you the first question. What do you want from this setup? Are you trying to go as absolutely fast as possible on gas? Do you want an all out race car that you need to kill the motor as soon as the pass is done and then tow back to your trailer to pull the plugs, drain the overflow, check the heads for leaks and fill the bottle? Are you willing to be on the edge where the possible outcome is damage? How often are you willing to have the motor and tranny refreshed?

Or if none of that sounds like fun then maybe you want a nitrous setup that will brake your liver but not your wallet.

You see, you can't just ask how much will this handle when you haven't defined what you're willing to do or how fast you want to go.

1999TransamWs6

iTrader: (21)

I want to be able to go as fast as possible with a max effort motor without having to pull the motor apart every season. Something that will put alot of power down that I dont have to refresh all the time. It is going to be a solid roller so it will have to be overlooked frequently. I dont mind turning it off after a run when I spray. It will have a stand alone. I would like to go 8's as for a time im shooting for. i think that covers what your asking. To give you an idea...It is a 408 with ETP 265 TH-400 5000 stall 270/279 717/717 113 cam solid roller. 12.5:1 CR motor. Shifting around 8000 RPM. Hope this helps YOU help ME. Thanks

ZoFastSS

iTrader: (5)

Kevlar Helmut, and a big pine box.

Robert56

iTrader: (2)

Another, Big Dog who surely knows what it takes. Good questions/approach.
Robert

next

iTrader: (9)

Yes this helps. Are you sure you don't already have the motor built?

Here's my best suggestions - work on your suspension first. The setup in your sig for power on gas and the mph suggests you should be going a lot quicker than 10.2. At that power you should also have the short time to support it.

Next thing, drop weight. A LOT of weight. You are asking for some very big power levels from an LSx on gas to get that sled in the 8s. It can be done, but it will need more attention and maintenance than it sounds like you may want.

Here's another idea - don't make 8s the ultimate goal. Build the car to do whatever it will with your qualifications of maintenance. For that, I'd suggest a 300 shot of gas on a nitrous specific built motor. Get the car to hold the full shot coming out of the hole and you'll have a real fun ride. Get it light and the suspension right and 8s may come to you.

My suggestions are my own. Ultimately you have to do what's right for you. Here's a parting thought - count how many cars you've ever heard go 8s with an LSx on gas. Now how many have run 8s this year with an LSx on gas? Those numbers will tell you something when you evaluate what you want to do.

1999TransamWs6

iTrader: (21)

The motor is not built yet... I will work on weight as you said and get the car to hook on what I can spray. I believe my times where not as good as they should/could be becuase I still have a 3.23 gear and my converter was not exactly a nitrous converter. The car was hooking dead on a 240 shot but obviously another 60 shot and more power on motor will be harder to hook especially once a gear goes in it....As for the combo does it sound good? I think I have the right idea on what to do. What do you think? Thanks again for your help