358 vs. 408 stroker
09-21-2008, 07:21 PM
#1
5th Gear Member
Thread Starter
Join Date: Dec 2007
Location: NH
Posts: 3,485
358 vs. 408 stroker
witch would you build? a 358 or 408? how close would the cost be betwen the 2? and wich one would last longer? pros, cons of both? im thinking maybe propower budget 408 kit with rhs 200cc heads
09-21-2008, 09:35 PM
#2
2nd Gear Member
Join Date: Jul 2008
Location: California
Posts: 180
im considering a 358W instead of a 408. not much difference except a 358W is a 0.30 bore, basically a refresh.
http://www.popularhotrodding.com/hot...sor/index.html
you have to be smart and know what your are doing basically.
http://www.popularhotrodding.com/hot...sor/index.html
you have to be smart and know what your are doing basically.
09-21-2008, 09:44 PM
#3
3rd Gear Member
Join Date: Jul 2006
Location: Ontario
Posts: 547
me i would say 358 with those heads and also the 358 will live longer then a long stroke 408 that perduces a lot of heat unless you plan on drag only then i would do it but for a 408 id go with something like 210 eddys cost between the two 408 puts more pressure on your block making longtivity shorter. if you want to just make it so you have a refresh just go 0.010 then if you want to later when you have money go another 0.020 so it a total 4.030 bore and then have all the work done to it for the 408 if you go that path
09-21-2008, 10:15 PM
#4
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Join Date: Nov 2007
Location: Washington, Seattle
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me i would say 358 with those heads and also the 358 will live longer then a long stroke 408 that perduces a lot of heat unless you plan on drag only then i would do it but for a 408 id go with something like 210 eddys cost between the two 408 puts more pressure on your block making longtivity shorter. if you want to just make it so you have a refresh just go 0.010 then if you want to later when you have money go another 0.020 so it a total 4.030 bore and then have all the work done to it for the 408 if you go that path
If you are replacing the crank and rods, then it is ALWAYS worth going with higher displacement. The only exception is if you are knowledgable enough to not have to ask engine questions here LOL
09-21-2008, 10:39 PM
#5
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this is why i was going to use the rhs heads, also because i dont have all the money for the beter heads.http://www.popularhotrodding.com/tec...sor/index.html
i know that they also did a bunch of work to the heads, but everything else would be the same, but more out of the box parts. what do you guys think?
i know that they also did a bunch of work to the heads, but everything else would be the same, but more out of the box parts. what do you guys think?
09-22-2008, 06:29 PM
#7
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Join Date: Dec 2007
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no, ive been on the sites, and the prices are prettymuch accurate, i know im not gunna make all the power they did but i doubt itll be all THAT far off.. does anyone know the price of the world 28* heads? i need something chep, yet efficiant haha and so far it seems the propower and rhs heads seem the best....
09-22-2008, 07:25 PM
#8
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Join Date: Jul 2006
Location: Ontario
Posts: 547
in reply to dudeboy
no he said nothing about about changing the crank nore rods wich is y i was saying its cheaper to go 0.010 for a just changing pistons then going 0.030 where i live they base there price on how much work done to go 0.010 on a block is like 533.67 after tax
no he said nothing about about changing the crank nore rods wich is y i was saying its cheaper to go 0.010 for a just changing pistons then going 0.030 where i live they base there price on how much work done to go 0.010 on a block is like 533.67 after tax
Last edited by Cleeman99; 09-22-2008 at 07:45 PM.
09-22-2008, 11:53 PM
#10
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Join Date: Nov 2007
Location: Washington, Seattle
Posts: 551
I should have elaborated...
You are saying...
1. A 408w will produce more heat due to the longer stroke
2. A 408w is only suited for 'drag only' use due to the extra heat
3. The longer stroke of the 408w is what causes the extra heat
All of these are wrong...
More of what you are saying...
1. Side load from the 408w will reduce its longevity
2. Build the motor twice (358w now, go 408w later)
Item 1 has been discussed at great length here as well as other sites. Mostly in regards to the 347, but the same argument is being used with the 408w.... The R:S ratio will decrease longevity.
Again, this has been discussed at great length, and disproven.
If 408w is ever in the plans, then build the motor NOW.
It makes NO sense to build a 358w now, knowing that a 408w is going to happen in the future.
Build the motor right, build it once. This will cost less money in the long run.
Now, I'm not a pro at this stuff. Just my take on it...
jason
1. A 408w will produce more heat due to the longer stroke
2. A 408w is only suited for 'drag only' use due to the extra heat
3. The longer stroke of the 408w is what causes the extra heat
All of these are wrong...
... between the two 408 puts more pressure on your block making longtivity shorter. if you want to just make it so you have a refresh just go 0.010 then if you want to later when you have money go another 0.020 so it a total 4.030 bore and then have all the work done to it for the 408 if you go that path
1. Side load from the 408w will reduce its longevity
2. Build the motor twice (358w now, go 408w later)
Item 1 has been discussed at great length here as well as other sites. Mostly in regards to the 347, but the same argument is being used with the 408w.... The R:S ratio will decrease longevity.
Again, this has been discussed at great length, and disproven.
If 408w is ever in the plans, then build the motor NOW.
It makes NO sense to build a 358w now, knowing that a 408w is going to happen in the future.
Build the motor right, build it once. This will cost less money in the long run.
Now, I'm not a pro at this stuff. Just my take on it...
jason