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.
08-28-2007, 10:28 PM
#21
Originally Posted by Alex @ CMS
I wouldn't trust the L92 block, on all the blocks i've seen the sleeve have been out of center in the bore. Not a good thing when your using nitrous.
08-31-2007, 08:43 AM
#22
Originally Posted by JL ws-6
ls2 402, blocks are pretty strong and 80 lbs lighter then an iron block. The pwr difference you will see from a 408 vs a 402 is so little that it's not really worth mentioning, it certainly won't be enough to make up for 80 lbs.
HKE 408 here
09-01-2007, 09:03 AM
#25
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I have seen lots of LS1's come apart, and I can say I have VERY RARELY seen a block break, aluminum or iron, that was not broken by something else in the motor letting go first......
09-01-2007, 03:23 PM
#29
Originally Posted by dirty2kTA
what is the difference between a 402 and 408 besides 6ci?
402 is an ls2 block. alumium?
408 is an ls1 block or 6.0 truck block?
402 is an ls2 block. alumium?
408 is an ls1 block or 6.0 truck block?
Robert
09-02-2007, 06:19 AM
#31
the ls3 block has a slightly larger bore, so with a 4 inch stroke I think you get a 416. Probably a very viable option as well, the couple added CI makes going with that more worth while then the ls2 IMO, but it's not on the list. Block price will be at the ls2 level within 6 months as well, they're just a little more now because if availability I bet.
Of course, a big CI lsx block would be the ultimate, but again not on the list for this thread.
Of course, a big CI lsx block would be the ultimate, but again not on the list for this thread.
09-02-2007, 07:29 AM
#32
Originally Posted by JL ws-6
Don't tell eastside that, I know for sure that they've hit alum motors with 350 and then some and lived to run another day... unless you're planning on spraying 550, in that case you're probably right.
Yeah bu did they make more then a couple full passes, lift heads, or go fast consistantly? Most of the bigger hit nitrous cars make a couple hits then come apart over and over again. Iron is much more stable.
09-02-2007, 07:44 AM
#33
Originally Posted by dirty2kTA
what is the difference between a 402 and 408 besides 6ci?
402 is an ls2 block. alumium?
408 is an ls1 block or 6.0 truck block?
402 is an ls2 block. alumium?
408 is an ls1 block or 6.0 truck block?
All a 408 is, is a iron 6L lq4 truck block bored .030 and 4" stroke.
09-02-2007, 08:08 AM
#34
Originally Posted by GrannySShifting
Yeah bu did they make more then a couple full passes, lift heads, or go fast consistantly? Most of the bigger hit nitrous cars make a couple hits then come apart over and over again. Iron is much more stable.
I dunno man, I know they would do the maintenance teardown after big races, but I think that's standard praitce for every serious race setup. All I know, is that the motor's were going back together with the same parts, they weren't breaking stuff, and the blocks weren't showing any sign's of being unstable to the point that they were an issue.
09-03-2007, 04:57 PM
#35
Originally Posted by JL ws-6
the ls3 block has a slightly larger bore, so with a 4 inch stroke I think you get a 416. Probably a very viable option as well, the couple added CI makes going with that more worth while then the ls2 IMO, but it's not on the list. Block price will be at the ls2 level within 6 months as well, they're just a little more now because if availability I bet.
Of course, a big CI lsx block would be the ultimate, but again not on the list for this thread.
Of course, a big CI lsx block would be the ultimate, but again not on the list for this thread.
09-03-2007, 05:23 PM
#36
Originally Posted by Alex @ CMS
ls3=l92
Robert
09-03-2007, 07:43 PM
#37
Originally Posted by JL ws-6
I dunno man, I know they would do the maintenance teardown after big races, but I think that's standard praitce for every serious race setup. All I know, is that the motor's were going back together with the same parts, they weren't breaking stuff, and the blocks weren't showing any sign's of being unstable to the point that they were an issue.
And from what I've heard from a very good engine builder the old ls1 blocks are better than the new ls2 & ls3 blocks for N20 use.
He also says Iron blocks are the best for N20 by far.
09-04-2007, 07:44 AM
#39
Originally Posted by JL ws-6
I had that conversation with Erik myself once. Personally I've never seen a block fail, i'ts always something else that fails first.
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.
09-04-2007, 08:03 AM
#40
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.
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?