Built Iron 408 Limit
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Built Iron 408 Limit What do you guys thing this bottom end can handle?
Iron 408 LS1, Forged eagle crank and forged eagle H beams, ARP mains, Forged Diamond pistons, can't remember the rings but the owner of the motor sprayed a 100 shot on it a few times and said its built to handle A LOT of nitrous. I am sure I will also put ARP head studs in it.
Would a 400 threw two stages and maybe a progressive be safe on 110?
Or should I stick with a 300 threw a progressive?
Iron 408 LS1, Forged eagle crank and forged eagle H beams, ARP mains, Forged Diamond pistons, can't remember the rings but the owner of the motor sprayed a 100 shot on it a few times and said its built to handle A LOT of nitrous. I am sure I will also put ARP head studs in it.
Would a 400 threw two stages and maybe a progressive be safe on 110?
Or should I stick with a 300 threw a progressive?
Ive been told that the eagle rods were strong, but anything above 700hp watchout. I went with callies whcih are supposedly good for 800hp, just extra insurance. Another thing to consider is ring gap. The ring gap must be larger for larger shots of nitrous. My mahle piston rings reccomended a decent size larger for anything over 150, but under 150 it was a little smaller.
-Lurius
-Lurius
here is my .02$
look at what your rods are rated at....thats prolly flywheel ratings. dont go much over that. also since you dont know what your rings are gapped at play it safe. i also have MAHLE pistons and when i set my ring gap i used there settings and made up my own since i knew i was gonna go from 200-300 shot.
since you dont know id play it safe and not go much over a 200 shot but you in the end have to do what you want........ just remember when it blows theres noone to be mad at but yourself....this is what i had to remeber when my stock short block went south...
good luck
look at what your rods are rated at....thats prolly flywheel ratings. dont go much over that. also since you dont know what your rings are gapped at play it safe. i also have MAHLE pistons and when i set my ring gap i used there settings and made up my own since i knew i was gonna go from 200-300 shot.
since you dont know id play it safe and not go much over a 200 shot but you in the end have to do what you want........ just remember when it blows theres noone to be mad at but yourself....this is what i had to remeber when my stock short block went south...
good luck
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On The Tree
Joined: Jan 2007
Posts: 182
Likes: 0
From: Earth
yea 200 shot will be fine i spry a 300 shot on my built 408 but most of the time i will just spray 1 stage its a 100 shot my 408 w a 100 shot made 667rw and 665tq if i need more i will just spray the other stage 
Originally Posted by 408zo6
yea 200 shot will be fine i spry a 300 shot on my built 408 but most of the time i will just spray 1 stage its a 100 shot my 408 w a 100 shot made 667rw and 665tq if i need more i will just spray the other stage
I dunno which eagle h beam rods you are running.. but the motor Eastside built for me was originally gonna see a TON of nitrous, enough to go into the 8's... which takea over 1000 hp....... and they weren't at the least bit concerned about using them.
TECH Addict
Joined: Feb 2002
Posts: 2,319
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From: Lewisville, Texas
Originally Posted by JUICED96Z
What do you guys thing this bottom end can handle?
Iron 408 LS1, Forged eagle crank and forged eagle H beams, ARP mains, Forged Diamond pistons, can't remember the rings but the owner of the motor sprayed a 100 shot on it a few times and said its built to handle A LOT of nitrous. I am sure I will also put ARP head studs in it.
Would a 400 threw two stages and maybe a progressive be safe on 110?
Or should I stick with a 300 threw a progressive?
Iron 408 LS1, Forged eagle crank and forged eagle H beams, ARP mains, Forged Diamond pistons, can't remember the rings but the owner of the motor sprayed a 100 shot on it a few times and said its built to handle A LOT of nitrous. I am sure I will also put ARP head studs in it.
Would a 400 threw two stages and maybe a progressive be safe on 110?
Or should I stick with a 300 threw a progressive?
ya, before i got my eagle h-beams, i did a search, and they seem like they can take the task on of holding a very large shot, i think the pistons are more of a concern than the eagle rods when it comes to very large shots
Originally Posted by 408zo6
yea 200 shot will be fine i spry a 300 shot on my built 408 but most of the time i will just spray 1 stage its a 100 shot my 408 w a 100 shot made 667rw and 665tq if i need more i will just spray the other stage
I am looking at doing a 408 right now. Could you post your engine specs, as I like your results. I think a properly set-up 408 could take a 300rwhp shot all day, at least that's my plan to start off with if I go 408. A 400 shot, uhmmmm, probably ok also if everything is built from the get go with this size in mind.
Robert
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Originally Posted by LS1rulz
That's it? Heck, a stock shortblock handles a 150hp shot easily. Why would a forged bottom end like this be so weak? That's not even worth building!
Factoring in the fact that it will be making at least 525rwhp all motor.......
Not sure on the N20 setup if it will take a lot I will go DP.
On The Tree
Joined: Jan 2007
Posts: 182
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From: Earth
L.M.E 408 iron ,eagle crank ,callies h beam rods , wiseco nos pistons,fast 90/90, 257/266 cam, cometic head gaskets, dart 225 strp port and polish comptition vale job, and a D.F w two nx kits all work was done at new era in N.Y. thay did a graet job came out sweet!!!
all work was done at new era in N.Y. thay did a graet job came out sweet!!! Guest
Posts: n/a
Do you guys think a plate system would be safe for a 300?
Looked in the summit mag and it said the H-Beams with upgraded bolts will handle 1,000+ In the pics below it has an I on the rods but they look a lot more like H beams.
It has the 8740 rod bolts in it http://i51.photobucket.com/albums/f3...Picture193.jpg
He said it has about 4k miles or less on it
http://i51.photobucket.com/albums/f3...Picture213.jpg
http://i51.photobucket.com/albums/f3...Picture212.jpg
http://i51.photobucket.com/albums/f3...Picture202.jpg
Straight from eagle
ARP 7/16" 8740 Capscrew bolts standard (190,000 psi) unless otherwise noted. Optional ARP 2000 (230,000 psi) and ARP L-19 (265,000 psi) bolts for extreme horsepower applications. L-19 bolts are recommended for small block engines exceeding 700 horsepower and big block engines exceeding 850 horsepower.
With that kind od miles on the short block do you think it would be safe to upgrade to ARP 2000's and not worry about it? IE holes being out of round and stuff?
Looked in the summit mag and it said the H-Beams with upgraded bolts will handle 1,000+ In the pics below it has an I on the rods but they look a lot more like H beams.
It has the 8740 rod bolts in it http://i51.photobucket.com/albums/f3...Picture193.jpg
He said it has about 4k miles or less on it
http://i51.photobucket.com/albums/f3...Picture213.jpg
http://i51.photobucket.com/albums/f3...Picture212.jpg
http://i51.photobucket.com/albums/f3...Picture202.jpg
Straight from eagle
ARP 7/16" 8740 Capscrew bolts standard (190,000 psi) unless otherwise noted. Optional ARP 2000 (230,000 psi) and ARP L-19 (265,000 psi) bolts for extreme horsepower applications. L-19 bolts are recommended for small block engines exceeding 700 horsepower and big block engines exceeding 850 horsepower.
With that kind od miles on the short block do you think it would be safe to upgrade to ARP 2000's and not worry about it? IE holes being out of round and stuff?
Last edited by JUICED96Z; Apr 20, 2007 at 12:35 PM.
