03-04 cobra block vs. stock block?
12-16-2007, 07:34 PM
#1
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Join Date: Sep 2006
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03-04 cobra block vs. stock block?
I'm looking at the mmr short blocks and I was wondering are there any disadvantages of running the cobra cast iron block besides the extra weight?
12-16-2007, 07:43 PM
#4
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RE: 03-04 cobra block vs. stock block?
ORIGINAL: howarmat
cant stop can ya
cant stop can ya
I'll probably run 15psi for awhile and see how that goes. This is not a track car so i'm not to concerned about that extra 60lbs of metal on the front end, but if there are other pitfalls with the cobra block then i'll spring for a new stock block.
12-16-2007, 09:07 PM
#7
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RE: 03-04 cobra block vs. stock block?
i'm using the iron block from MMR, mostly since it's stronger, although the aluminum blocks are plenty strong and something else will probably break first. it's 60#'s heavier, so not a ton. I figured i could save the $600 and cut 60#'s out elsewhere (swaybar delete, seats, or something). The block does not have provisions for knock sensors, which isn't a big deal because a lot of higher performance motors will set them off anyways. They are passive sensors, so all you do is just unplug them. It also requires an adaptor plate for the motor mounts, and one side only uses 3 of the 4 bolts. Again, not a big deal, works fine for me and MMR runs their huge HP cars the same way. All that to say, if I had to do it again, i may have gone with aluminum because i am taking it to the track more than i anticipated...
12-16-2007, 10:08 PM
#9
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Join Date: Aug 2006
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RE: 03-04 cobra block vs. stock block?
ORIGINAL: Stage4
i'm using the iron block from MMR, mostly since it's stronger, although the aluminum blocks are plenty strong and something else will probably break first. it's 60#'s heavier, so not a ton. I figured i could save the $600 and cut 60#'s out elsewhere (swaybar delete, seats, or something). The block does not have provisions for knock sensors, which isn't a big deal because a lot of higher performance motors will set them off anyways. They are passive sensors, so all you do is just unplug them. It also requires an adaptor plate for the motor mounts, and one side only uses 3 of the 4 bolts. Again, not a big deal, works fine for me and MMR runs their huge HP cars the same way. All that to say, if I had to do it again, i may have gone with aluminum because i am taking it to the track more than i anticipated...
i'm using the iron block from MMR, mostly since it's stronger, although the aluminum blocks are plenty strong and something else will probably break first. it's 60#'s heavier, so not a ton. I figured i could save the $600 and cut 60#'s out elsewhere (swaybar delete, seats, or something). The block does not have provisions for knock sensors, which isn't a big deal because a lot of higher performance motors will set them off anyways. They are passive sensors, so all you do is just unplug them. It also requires an adaptor plate for the motor mounts, and one side only uses 3 of the 4 bolts. Again, not a big deal, works fine for me and MMR runs their huge HP cars the same way. All that to say, if I had to do it again, i may have gone with aluminum because i am taking it to the track more than i anticipated...
Andrew
12-16-2007, 10:45 PM
#10
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Join Date: Mar 2006
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RE: 03-04 cobra block vs. stock block?
ORIGINAL: MexGT
Stock alum block is good for 900 - 1,000 hp anyway?
Stock alum block is good for 900 - 1,000 hp anyway?
Here's an excerpt from the September 2007 issue of MM&FF (page 46), the Horse's mouth article on FRPP's new line of aluminum 4.6 crate engines.
