Looking to build 454lsx
Looking to build 454lsx Ive been looking into building either a lsx 454 or a ls3 427. I was wondering about reliability problems with such a short rod to stroke ratio? Also whos short block would be recommended as far as price and reliability? Does anyone offer a warranty with a short block? Im wanting to make 550 to 650 rwhp with a 6spd gto.
550 to 650 is a huge difference with a n/a engine! But hke and lme are both proven builders along with many other sponors on here. I think they will all warranty on the work on the engine but as far as when its in your car i dont think anyone will warranty it once you start beating on it lol.
Remember that HP numbers aren't everything. I decided to go from a 454 4.125 stroke 4.187 bore, to a 443 with a 4 inch stroke and 4.20 bore. Motor revs faster, an is going to like the nitrous. I made 570 with some TEA ported 317 heads, and a relatively small camshaft through a 6spd and 9 inch.
-Clayton
-Clayton
Remember that HP numbers aren't everything. I decided to go from a 454 4.125 stroke 4.187 bore, to a 443 with a 4 inch stroke and 4.20 bore. Motor revs faster, an is going to like the nitrous. I made 570 with some TEA ported 317 heads, and a relatively small camshaft through a 6spd and 9 inch.
-Clayton
-Clayton
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Verdad Gallardo Remember that HP numbers aren't everything. I decided to go from a 454 4.125 stroke 4.187 bore, to a 443 with a 4 inch stroke and 4.20 bore. Motor revs faster, an is going to like the nitrous. I made 570 with some TEA ported 317 heads, and a relatively small camshaft through a 6spd and 9 inch.
-Clayton
-Clayton
, remember RPM's are your friend. FWIW Eric is the one who told me to stay away from the 4.125 crank when building a nitrous motor. Couple things here:
You never compared to one to the other at the track so you don't have any results thats says a smaller engine makes a car quicker.
You made more power because the other engine was built wrong if it was eating oil.
Erik does not recommend a power add when the piston is compromised, not directly due to the stroke of the crank. The piston gets compromised on the longer stroke.
Couple things here:
You never compared to one to the other at the track so you don't have any results thats says a smaller engine makes a car quicker.
You made more power because the other engine was built wrong if it was eating oil.
Erik does not recommend a power add when the piston is compromised, not directly due to the stroke of the crank. The piston gets compromised on the longer stroke.
You never compared to one to the other at the track so you don't have any results thats says a smaller engine makes a car quicker.
You made more power because the other engine was built wrong if it was eating oil.
Erik does not recommend a power add when the piston is compromised, not directly due to the stroke of the crank. The piston gets compromised on the longer stroke.
How does that statement make sense? Maybe im not reading it clearly?
Haha your kinda jumpin on me off the bat aren't you? I was just providing my info, hopefully to help this guy in his decision making process.
Im saying in my case my new setup made more power, there were alot of variables along with oil burning. I didn't setup the last motor that was in it.
From my understanding you can't run a good nitrous piston, ring-land design and wrist-pin location, with that long of a stroke on the iron blocks.
I was not jumping on you, just correcting a few things you said.Someone reading what you had posted might get mislead.
Yes the sleeve length is not of such that you can run the longer stroke without compromising the piston.
But, increased stroke does cause more side loading on the pistons, and you always want to use the longest rod possible. Maybe thats just my opinion
