Max Hp on stock crank?
Jan 12, 2015 | 04:31 PM
#2
On The Tree
Joined: May 2014
Posts: 111
Likes: 0
From: Wa
I am building a 03 LQ4 and everyone I have talked to says they are good up to around 1000hp, I am shooting for 800hp at the crank and 650-700hp at the wheels and am going with the stock crank as long as it checks out. If not then I am going to a 4" stroke crank.
Jan 12, 2015 | 04:45 PM
#5
Yea... thats gettin after it alright. No wonder you runt he times you do. Impressive ****.
To add a slight twist to this... I wonder what they are capable of with a supercharger as opposed to a turbo.
The supercharger is much more difficult on it for a few reasons. The first is that a supercharger has parasitic loss, meaning that to make 800 crank HP you need to really be making about 900 (its just a guess, but it works for this illustration). To add to that its an opposite force on the snout of the crank adding a ton of force to that one area. So not only is it the equivalent or a great HP force on the crank, but its an additional reverse rotational force.
To add a slight twist to this... I wonder what they are capable of with a supercharger as opposed to a turbo.
The supercharger is much more difficult on it for a few reasons. The first is that a supercharger has parasitic loss, meaning that to make 800 crank HP you need to really be making about 900 (its just a guess, but it works for this illustration). To add to that its an opposite force on the snout of the crank adding a ton of force to that one area. So not only is it the equivalent or a great HP force on the crank, but its an additional reverse rotational force.
Jan 12, 2015 | 04:51 PM
#6
Formerly ScreamingL
Joined: Oct 2003
Posts: 3,456
Likes: 5
From: From the 412
i will chime in as ive made over 1000 rwhp with a stock motor
around a 1000 rwhp you start to flex the crank badly and you notice this by oil pressure dropping. this flexing starts to wipe out the mains, typically youll see a drop of 10psi all of a sudden...motor still runs just has lower oil pressure
eventually it will fail
around a 1000 rwhp you start to flex the crank badly and you notice this by oil pressure dropping. this flexing starts to wipe out the mains, typically youll see a drop of 10psi all of a sudden...motor still runs just has lower oil pressure
eventually it will fail
Jan 12, 2015 | 05:47 PM
#7
Thread Starter
Staging Lane
Joined: Nov 2014
Posts: 67
Likes: 1
From: Tacoma WA
Yeah eating the main bearings out is something Id like to avoid, 800 to the wheels is a ton in a truck glad to know it will hold together. Last thing I want is to get it in and have to pull it right back out.
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Jan 13, 2015 | 12:38 PM
#8
Jarrett(Stock48) would be the man to talk to about this. I think he was pushing well over 800hp at all 4 tires(4WD) on his stock bottom end 6.0L and I think he's doing the same in his Nova.
Jan 13, 2015 | 04:46 PM
#9
Formerly ScreamingL
Joined: Oct 2003
Posts: 3,456
Likes: 5
From: From the 412
read up on how the crack flexes over 1000rwhp and see how many ppl drop oil pressure after awhile
Jan 13, 2015 | 07:17 PM
#10
On The Tree
Joined: May 2014
Posts: 111
Likes: 0
From: Wa
So would 800hp at the crank be about the max you would want to go and have it last a while?