View Poll Results: Which one?
383
14
22.22%
408
49
77.78%
Voters: 63. You may not vote on this poll
383 or 408
10-16-2004, 11:15 AM
#22
TECH Senior Member
Why not, it depends on the cam, lobes used etc....more trq oriented, kinda like the VHP grinds.
What I'm saying is that a properly thought of 383 can rival an average 408. Now if you go radical on the 408 then I have to agree with you.
What I'm saying is that a properly thought of 383 can rival an average 408. Now if you go radical on the 408 then I have to agree with you.
10-16-2004, 11:29 AM
#23
Originally Posted by PREDATOR-Z
Why not, it depends on the cam, lobes used etc....more trq oriented, kinda like the VHP grinds.
What I'm saying is that a properly thought of 383 can rival an average 408. Now if you go radical on the 408 then I have to agree with you.
What I'm saying is that a properly thought of 383 can rival an average 408. Now if you go radical on the 408 then I have to agree with you.
I will agree, somewhat to the statement of a properly built 383 rivaling an average 408. However, you're decreasing reliability with a more effort built 383 vs the average 408. The average 408 will have better valve spring life, can spin less RPMs, and still make about the same peak power as the more effort designed 383. An average 408 can use a larger cam and still be "tame" vs the cam that will have to be used in the 383 to reach the peak output of the average 408. Even the average 408 will almost always put out MUCH more power throughout the ENTIRE rpm range vs the more effort built 383.
There's a HUGE difference in peak HP/TQ and having more area under the curve.
*This is holding the idea of iron vs aluminum out of the comparison*
10-16-2004, 11:57 AM
#24
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Originally Posted by CANNIBAL
Maybe in PEAK output but not overall (power under the curve) output. Just not possible.
So what would be the best CR for max power on 93 octane? I have edit so timing can be adjusted if necessary
Last edited by SSkeet; 10-16-2004 at 12:08 PM.
10-16-2004, 01:36 PM
#25
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Originally Posted by PREDATOR-Z
Why not, it depends on the cam, lobes used etc....more trq oriented, kinda like the VHP grinds.
What I'm saying is that a properly thought of 383 can rival an average 408. Now if you go radical on the 408 then I have to agree with you.
What I'm saying is that a properly thought of 383 can rival an average 408. Now if you go radical on the 408 then I have to agree with you.
10-16-2004, 01:42 PM
#26
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The aluminum block is strong enough for 95% of us.
By the time you do all the weight reduction to offset the iron block, you're half way to paying the difference between the iron and aluminum in the first place.
Take that either way you wish
With the prices of LS2 blocks already below $999, you might want to check into that option.
I believe an LS2 would be cheaper than a sleeved LS1, depending on what else you have to change to use an LS2 block.
10-16-2004, 01:46 PM
#27
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Originally Posted by z98
Who is this 5% you speak of? As far as I know, the top dogs in LS1 power all use either LS1 or C5R blocks.
By the time you do all the weight reduction to offset the iron block, you're half way to paying the difference between the iron and aluminum in the first place.
Take that either way you wish
With the prices of LS2 blocks already below $999, you might want to check into that option.
I believe an LS2 would be cheaper than a sleeved LS1, depending on what else you have to change to use an LS2 block.
By the time you do all the weight reduction to offset the iron block, you're half way to paying the difference between the iron and aluminum in the first place.
Take that either way you wish
With the prices of LS2 blocks already below $999, you might want to check into that option.
I believe an LS2 would be cheaper than a sleeved LS1, depending on what else you have to change to use an LS2 block.
EDIT: A Darton MID sleeve is also stronger than a C5-R block.
10-16-2004, 01:48 PM
#28
Originally Posted by z98
By the time you do all the weight reduction to offset the iron block, you're half way to paying the difference between the iron and aluminum in the first place.
10-16-2004, 01:48 PM
#29
Originally Posted by KingCrapBox
Some people are just mistaken. A re-sleeved Aluminum block is stronger than a 6.0L Iron block. The tensile strength of a Darton MID sleeve is 110,000 PSI.
EDIT: A Darton MID sleeve is also stronger than a C5-R block.
EDIT: A Darton MID sleeve is also stronger than a C5-R block.
10-16-2004, 01:52 PM
#30
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Originally Posted by KingCrapBox
Some people are just mistaken. A re-sleeved Aluminum block is stronger than a 6.0L Iron block. The tensile strength of a Darton MID sleeve is 110,000 PSI.
EDIT: A Darton MID sleeve is also stronger than a C5-R block.
EDIT: A Darton MID sleeve is also stronger than a C5-R block.
10-17-2004, 11:52 PM
#33
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So if I have 2.055 and 1.6 valves, what would be a good cam to keep the car streetable? I dont want something very lopey that I have to tune for 1300rpm or more to get to idle. Want something that is going to sound and feel at idle like a basic 346 with a cam...any ideas? I was thinking something like
246/250 .60x/.62x 112 lsa but I ran that by some people that said that will be too much for what I want.
THis is for 408 btw
246/250 .60x/.62x 112 lsa but I ran that by some people that said that will be too much for what I want.
THis is for 408 btw
10-18-2004, 06:39 PM
#35
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Re-sleeving too expensive. A iron block, and this is according to speed demon, weighs 68 lbs more than an ls1 block. Honestly, that isn't much. Can't see that compromising handling too much. Not too mention, I think the original idea of the aluminum block was to have fuel efficiency. By the time you reach this far into your mods, your foot is in it so hard, it doesn't matter. As far as the C5R and the Darton blocks, maybe those are the king of the hill, but also a budget buster. I don't think a iron block 408 can be beat as far as price for power. Don't get me wrong though, I'd go C5R if I could, but guess what...I can't.
