View Poll Results: which motor or your own
402
31
17.42%
408 IRON
104
58.43%
LS2
8
4.49%
370 IRON
16
8.99%
346
25
14.04%
Multiple Choice Poll. Voters: 178. You may not vote on this poll
Best Motor For N20 If You Were Going To Build One.
09-04-2007, 08:20 AM
#41
Originally Posted by Specialized
How does one come to find out there is a problem then? Im not quite understanding how you know if/when you do have a core issue- it obviously is too late, but what happens when this issue does arise?
Erik has told us that if you want to spray 300 or more to use an iron block.
He is the man so we dont question him we just say OK.
And with the abuse my motor has taken over the last 2 years and still going strong he has made me a believer. If we blow it up tomorrow I wouldnt be mad, I got my money's worth out of it.
There's a reason the new LSX block is iron
09-04-2007, 10:59 AM
#43
Originally Posted by ATVracr
The block doesnt have to fail for it to be a problem.
You'll never know if you get some core shift at BIG power levels.
You'll never know if you get some core shift at BIG power levels.
I agree that is a possibility, at levels over 900 rwhp..... but at that point usually other issues start popping up anyway before the block has a chance to fail.
09-04-2007, 12:47 PM
#44
Originally Posted by JL ws-6
I agree that is a possibility, at levels over 900 rwhp..... but at that point usually other issues start popping up anyway before the block has a chance to fail.
Bore distortion and block shift might happen before 900 rwhp.
I bet the alum version of the LSX is going to be aimed at N/A use.
09-04-2007, 01:12 PM
#45
very possible that the alum will be aimed at n/a use... I dunno. doesn't matter because unless mine gets hurt I won'e be building one any time soon.
As for block distortion... I know what you're talking about, but how many people do you know that have for sure seen it happen, before having another issue?
As for block distortion... I know what you're talking about, but how many people do you know that have for sure seen it happen, before having another issue?
09-04-2007, 01:29 PM
#46
Originally Posted by JL ws-6
As for block distortion... I know what you're talking about, but how many people do you know that have for sure seen it happen, before having another issue?
You'll see more and more of it with all these LS2 402's and l92 blocks being used.
I would keep the N20 under 250 rwhp for your 402.
09-04-2007, 01:40 PM
#47
Originally Posted by Robert56
Alex, have you heard or seen any issues with the l92 heads? Some are impling that there isn't enough deck to hold a big shot? Is this just speculation at this point, or a reality? I want to try these heads, but the jury is still out, I think.
Robert
Robert
Theoretically they should be able to hold down the same amount of N20 as a ls6/ls2/ls1 head.
We have a customer that will be running a set of our CNC'd heads on a 402 with a big shot. we'll se how it holds up in about a month or two.
09-04-2007, 01:48 PM
#48
Originally Posted by Specialized
How does one come to find out there is a problem then? Im not quite understanding how you know if/when you do have a core issue- it obviously is too late, but what happens when this issue does arise?
The aluminum is just not strong enough to handle the rotational forces. there are a few things you can do to help, billet caps and a girdle will help keep the block together along with a shortfill but now you are talking an extra 1k on to your motor in just support.
I've talked to ERIK on this matter as well, the reason the LS1 (real LS1 not ls6 common block) is stronger is because the origional ls1 block did not offer the bay to bay breathing that the newer blocks do, this keeps vital material along the structural webbing of the block.
For a Big shot Motor Iron is the only way unless you go for an aftermarket block like the Dart Billet or the Warhawk. These block are designed to take the HP.
09-04-2007, 02:03 PM
#49
Originally Posted by ATVracr
You'll see more and more of it with all these LS2 402's and l92 blocks being used.
I would keep the N20 under 250 rwhp for your 402.
I would keep the N20 under 250 rwhp for your 402.
Until I get bored running it n/a I'm not even gonna put it on. Eventually I will, but it's nowhere in sight.
09-04-2007, 02:22 PM
#50
Originally Posted by Alex @ CMS
you start to hammer the bearings when the block deflects, depending on how bad it is you can score the cylinder wall or bust open a ringland.
The aluminum is just not strong enough to handle the rotational forces. there are a few things you can do to help, billet caps and a girdle will help keep the block together along with a shortfill but now you are talking an extra 1k on to your motor in just support.
I've talked to ERIK on this matter as well, the reason the LS1 (real LS1 not ls6 common block) is stronger is because the origional ls1 block did not offer the bay to bay breathing that the newer blocks do, this keeps vital material along the structural webbing of the block.
For a Big shot Motor Iron is the only way unless you go for an aftermarket block like the Dart Billet or the Warhawk. These block are designed to take the HP.
The aluminum is just not strong enough to handle the rotational forces. there are a few things you can do to help, billet caps and a girdle will help keep the block together along with a shortfill but now you are talking an extra 1k on to your motor in just support.
I've talked to ERIK on this matter as well, the reason the LS1 (real LS1 not ls6 common block) is stronger is because the origional ls1 block did not offer the bay to bay breathing that the newer blocks do, this keeps vital material along the structural webbing of the block.
For a Big shot Motor Iron is the only way unless you go for an aftermarket block like the Dart Billet or the Warhawk. These block are designed to take the HP.
Erik is the ******* man !!
09-04-2007, 07:29 PM
#51
Originally Posted by Alex @ CMS
We've cut sectioned the heads and they have the same deck thickness as all other LS series heads. Only problem is they really don't like to stay down with the increased Cylinder pressure. The FI guys are keeping down to about 800whp so far but thats with a gradual increase in pressure not a instant spike from the N20.
Theoretically they should be able to hold down the same amount of N20 as a ls6/ls2/ls1 head.
We have a customer that will be running a set of our CNC'd heads on a 402 with a big shot. we'll se how it holds up in about a month or two.
Theoretically they should be able to hold down the same amount of N20 as a ls6/ls2/ls1 head.
We have a customer that will be running a set of our CNC'd heads on a 402 with a big shot. we'll se how it holds up in about a month or two.
Robert
09-04-2007, 08:33 PM
#52
We really don't know why, all we can do is guess until we see a few more setups being run.
I don't think so, i think he's going to run the arp2000 material.
Ill get you a price, what springs would you like, you can PM me to keep this on topic..
I don't think so, i think he's going to run the arp2000 material.
Ill get you a price, what springs would you like, you can PM me to keep this on topic..
09-16-2007, 06:19 PM
#53
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Originally Posted by Robert56
Alex, have you heard or seen any issues with the l92 heads? Some are impling that there isn't enough deck to hold a big shot? Is this just speculation at this point, or a reality? I want to try these heads, but the jury is still out, I think.
Robert
Robert
I will be testing my HKE 408 with ARP bolts on a set of Greg Good ported L92 heads with good valves and springs and some ARP stock style head studs holding the heads on the block........ with a 300 progressive shot of nitrous. We will see how well this works together.
09-16-2007, 08:54 PM
#54
Originally Posted by Forteen3GT
I will be testing my HKE 408 with ARP bolts on a set of Greg Good ported L92 heads with good valves and springs and some ARP stock style head studs holding the heads on the block........ with a 300 progressive shot of nitrous. We will see how well this works together.
09-18-2007, 05:30 PM
#55
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Originally Posted by big thumper122
should be just fine considering HUNDREDS of people have done just that over the years
it was somewhat a joke.... the LS3 heads deck is just as thick as LS6 heads.... and you are right..... "many" have done 300 progressives or 2 stages on stock style heads..... very common. Now a 500 shot or 400... that is a different story.
09-18-2007, 10:00 PM
#56
Originally Posted by Forteen3GT
it was somewhat a joke.... the LS3 heads deck is just as thick as LS6 heads.... and you are right..... "many" have done 300 progressives or 2 stages on stock style heads..... very common. Now a 500 shot or 400... that is a different story.
