5.3 build
03-13-2011, 10:23 PM
#21
Thx a lot fellas.
I'm hoping to just get hold of an engine that I wont have to open up - one that is in decent shape and without a huge amount of miles on the ticker. That way I really keep cost down. Just swap out intake, cam, injectors for the LS6 stuff and go.
I figure the 5.3 is a near 300 hp engine stock anyway so the LS6 intake and cam should really wake it up and be more then enough for my S10.
Trouble on the LS6 heads is they're pretty scarce up here Ont. Canada from what I can tell so far - and those that have 'um want way too much for something that may have had way too much abuse.
I figure even with those parts I should be able to make some decent power.
I'm hoping to just get hold of an engine that I wont have to open up - one that is in decent shape and without a huge amount of miles on the ticker. That way I really keep cost down. Just swap out intake, cam, injectors for the LS6 stuff and go.
I figure the 5.3 is a near 300 hp engine stock anyway so the LS6 intake and cam should really wake it up and be more then enough for my S10.
Trouble on the LS6 heads is they're pretty scarce up here Ont. Canada from what I can tell so far - and those that have 'um want way too much for something that may have had way too much abuse.
I figure even with those parts I should be able to make some decent power.
If I'm not mistaken, I think I remember reading the truck manifolds tend to make more power than the LS6, but the trouble is that the truck manifold is taller so you need the hood clearance to fit it.
03-13-2011, 10:28 PM
#22
I was hoping that since im going to have to get the 799 heads shaved anyway that would give me the CR that i need. Id be curious to see numbers going both ways. What kind of CR should we be be hunting for to get a good balance of HP and MPG without getting into having to run premium gas?
03-13-2011, 10:32 PM
#23
I was hoping that since im going to have to get the 799 heads shaved anyway that would give me the CR that i need. Id be curious to see numbers going both ways. What kind of CR should we be be hunting for to get a good balance of HP and MPG without getting into having to run premium gas?
03-13-2011, 10:47 PM
#25
remauto1187 im running a .522 .529 lift cam. nothing huge but it will be nice. for the heads i got a smoking deal on them thats why i bought them. you could spend your money else where like getting the 862s ported or polished. alot of people do that for the money. then get a ls6 intake you would be golden
03-13-2011, 11:12 PM
#26
I have been scouring the whole U.S. for a deal on a LS6 intake which is what i planned on running.
Now you got me on the fence....since i have a set of 862 and 706 heads here right now. (I have (2) 5.3l engines that i picked up for $350 for the pair) complete....well one did have a top burn...but it was just a truck intake manifold which wont work for me anyway in a vette.
Thanks for putting me on the fence!
Now you got me on the fence....since i have a set of 862 and 706 heads here right now. (I have (2) 5.3l engines that i picked up for $350 for the pair) complete....well one did have a top burn...but it was just a truck intake manifold which wont work for me anyway in a vette.
Thanks for putting me on the fence!
03-13-2011, 11:23 PM
#27
He couldnt just blurt out what he thought only he knew....instead of acting like a 7yo (i gotta secret).
And i hope his secret wasnt just the rebalance the rotating assembly with the 5.7l pistons......DUH! NO SHI^ SHERLOCK.
(Rant off)
You guys can count on me to do what i can to HELP you out.
03-13-2011, 11:59 PM
#29
Some years later.....sure....a 6.0L bored and stroked will be in order. But right now a 5.3l/5.7l project will keep me entertained.
03-14-2011, 12:24 AM
#30
The car is a 1985 Corvette originally equipped with a L-98 TPI 350 rated around 240hp stock. The car will be a daily driver that is put up during the winter and will probably never hit the dragstrip. I have alot of pokers in the fire IE: Rebuilding a house that i bought, running power to a garage, rebuilding another garage, converting house to 200a service and more. So im trying to keep the $$$ in a reasonable range for the motor. I would like to get a min. of 350HP and anything above would be gravy. Id like to keep it running on 87 octane but if i had to mix e-85 with 87 that would be ok too.
Some years later.....sure....a 6.0L bored and stroked will be in order. But right now a 5.3l/5.7l project will keep me entertained.
Some years later.....sure....a 6.0L bored and stroked will be in order. But right now a 5.3l/5.7l project will keep me entertained.
03-14-2011, 12:32 AM
#31
400hp would be really sweet for my "budget build". I am definitely going with the bore on the 5.3l block to 5.7l. When you say 243 heads...do you mean with true intake/exhaust valves of the ls6 or with the ls1 valves. Id like to keep with ls1 valves.....since i have 5 AC Delco brand new ones that i landed for $8 each. Now i just gotta score 3 more. lol
03-14-2011, 12:48 AM
#32
400hp would be really sweet for my "budget build". I am definitely going with the bore on the 5.3l block to 5.7l. When you say 243 heads...do you mean with true intake/exhaust valves of the ls6 or with the ls1 valves. Id like to keep with ls1 valves.....since i have 5 AC Delco brand new ones that i landed for $8 each. Now i just gotta score 3 more. lol
03-14-2011, 01:11 AM
#33
no the ls6 heads are some of the best stock heads you can get. they beat just about any stock head there is. instead of buying a aftermarket cam you could just get a ls6 cam to with those heads, that would be alittle cheaper. im not sure if you can use ls1 valves in a ls6 head. they will prolly fit but you would have to check PTV clearence first.
But i dont think i want to get into the cost of the ls6 titanium intake valves and the sodium filled exhaust valves. They are pretty pricey! I am going to go with the 234/799 heads. I have visited the idea of the ls6 ac delco cam ....i am still pondering that.
03-14-2011, 01:43 AM
#34
I know they are both 8mm stems but i believe i read somewhere that the ls6 valves are a little longer than the ls1 valves, which is no big deal since you can always buy shorter pushrods.
But i dont think i want to get into the cost of the ls6 titanium intake valves and the sodium filled exhaust valves. They are pretty pricey! I am going to go with the 234/799 heads. I have visited the idea of the ls6 ac delco cam ....i am still pondering that.
But i dont think i want to get into the cost of the ls6 titanium intake valves and the sodium filled exhaust valves. They are pretty pricey! I am going to go with the 234/799 heads. I have visited the idea of the ls6 ac delco cam ....i am still pondering that.
