blue99fbody

iTrader: (5)

hey im in the process of a 393ci build and im wondering how much nitrous i could put to it, with the large stroke and shorter piston skirts? i would like to put as much as i can to it but i have heard not to throw much at it, and would like some more opinions or first hand experience. im shooting for 500whp NA and then as much nitrous i can safely put to it with a good tune. i will be fueling it with a stand alone system also. Would a progressive controller or duel stage setup allow me to spray more?

4.100 stroke eagle crank
6.125 eagle h beam rods with arp 2000s
3.905 arias flat top pistons
~11.5-11.8:1 cr

thanks

badss_02

iTrader: (2)

Harris speed works has a new progressive dual stage controller... I wouldn't go more than a 200 shot, maybe a 250 shot with a good tune and good fuel... Definitely run at least tr7 plugs... The thing about a progressive controller is the initial hit is not as harsh, and yes you would be able to run a bigger shot with one than without.

blue99fbody

iTrader: (5)

i would be more than happy if i could put a 200 shot to it and i will be running race gas in the stand alone.

anyone else?

Chris@NitroDaves

With the stand alone you should be able to hit 200hp without a problem. The main factor will be the pistons if they are N/A pistons then you wil be limited to what you can spray but if they are nitrous pistons then shouldn't have anything to worry about.

If you plan on never going over 250hp with the setup then i'd suggest using one of our plate kits which perform flawlessly at 200+hp ( As long as the tune is correct and the fueling is there ). Also instead of going to multiple stages i'd stick with a single stage paired with a progressive controller.


Here are some vids of our plate in action

Pilled @ 200HP
http://www.youtube.com/watch?v=bn1fa...layer_embedded

Pilled @ 200hp
http://www.youtube.com/watch?v=J17kW...layer_embeddedSame Pass different angle
http://www.youtube.com/watch?v=5F0rD...layer_embedded

Pilled @ 100hp
http://www.youtube.com/watch?v=unYEG...layer_embedded

Pilled @ 150hp
http://www.youtube.com/watch?v=KPq5L...layer_embedded

Pilled @ 200hp
http://www.youtube.com/watch?v=VEaQg...layer_embedded

ShiznityZ28

iTrader: (11)

Theres no way i would put a 4.1 stroke in a stock deck height aluminum block. with a compression height of 1.06 the pistons will not be very nitrous friendly and the skirts small causing oil control issues. long stroke on short deck heights are for Na motors.

Id build a 3.9 crank in the same motor and get a 1.165 and the piston could be longer and stronger. youd get a 373 and maybe give up 20 rwhp NA but be able to put another 150 to it easy on the jug.

ShiznityZ28

iTrader: (11)

Chris you can't get a good nitrous piston in there with a 4.1 stroke. 4 maybe 3.9 definatly

ATVracr

iTrader: (5)

Buy a LS2 block and put a 4" crank in it, it will be alot faster and you will be alot happier.

blue99fbody

iTrader: (5)

ya im not looking for other options just educated answers to the question at hand i already have the rotating assembly. thanks though

ATVracr

iTrader: (5)

Dont spray it.

its a ticking time bomb.

blue99fbody

iTrader: (5)

thanks i was told by arias 125 max on that set up. Eagle reps told me it would handle 250 no problem when i bought the assembly i guess they will say anything to sell product. car will be raced on motor most of the time at the track but would just like to have a lil if it was possible for the street. if i had tons of money to play with i would love to take your guys advise on the other set ups but price was right on this and i was pretty much straight up lied to so live and learn.

still would love to hear more opinions though

BAKED

iTrader: (14)

You need to listen to what Shiz and ATV are telling you. That setup will not handle a very big shot. If you insist on spraying it then just put a 100-150 shot on it and enjoy it. Other wise you will be throwing alot of money down the toilet.

ATVracr

iTrader: (5)

Maybe a 100 shot but the tune up needs to be spot on.
That piston and ring pack wont tolerate a bad tune for very long.

GrannySShifting

iTrader: (10)

ran 150 shot on a piston w/ .99-1.00" compression height, wasnt aggressive with it on pump gas, made good power though. Wasnt the warm and fuzziest feeling, but was fine. Miss once and it will immediately bite you in the *** though.

If all your trying to do is spray it once in a while with just alittle 100 hit or something and everything is done right, ok, but if you plan on hitting it with a couple hundred or more, no chance

cdubbzz

iTrader: (11)

I have nearly the exact combo (mine is 3.915 x 4.100)and will be adding nitrous over the winter. I plan to
run ~125hp shot and will let you know how it goes. Both my engine builder and my tuner are first class so
if she blows I'll be the first to report it.

Rotating assembly is Eagle but pistons are custom by Venolia

BTW I've had this combo for 3+ years/12k+miles hence the need for more power LOL

Firehawk441

iTrader: (41)

The 4.1 stroke is not a good power adder choice. It can be done though.

We have an LSX block in one of our cars with a 4.125 stroke and a custom Diamond piston. It has 100+ passes with a 300 shot and still going strong. The car weighs 3570 lbs. and runs 9.0 @ 153 consistantly. It crosses the stripe @ 7100 RPM's.

I still wouldn't recommend it.

ShiznityZ28

iTrader: (11)

I agree with atv. its probably going to drink oil. if it don'e stay with a 100 shot.

ShiznityZ28

iTrader: (11)

LSX block has a longer sleve so it can take a bigger strokeand not pull the piston out at the bottom. you could alos put a smaller rod in if you need the comression height.

Firehawk441

iTrader: (41)

Absolutely! I have a few more "Bandaids" on it also. It's what he wanted so I aim to please. This engine is on the edge.

I've built nitrous assisted engines since the mid 80's. Mostly big chevies. Just started two years ago with the LS stuff. It's all the same concepts. Tougher with a 10.5 tire.

You guys are doing very well. Keep it up

Nitro Dave's Nitrous Outlet

iTrader: (25)

Need to listen to these guys. They are giving you sound advice. The set up you have is designed for a Naturally Asperated application. You can spray it but I would not spray any more than a 100 to 150 hp if you want it to last.

Dave

blue99fbody

iTrader: (5)

ya thanks i do value their opinions and appreciate the help and ill prob stay between 100 and 150 shot every now and then.