400hp
3rd Gear Member
Joined: Feb 2006
Posts: 523
From:
RE: 400hp
ORIGINAL: 281GT
The last poster has a valid point although there's more to be considered. First of all 400 hp n/a IS possible from these motors while retaining stock like driveability. You don't need really wild cams to do it. Not long after the S197 came out Livernois motorsports got 380 hp from a 3v 4.6 using long tube headers, off road H-pipe, a good air intake and ported heads on stock cams. This isn't too far off the 400 hp mark and even mild cams combined with the other changes would get the additional 20 hp to make 400 hp at the crank.
True, for not much more than the mods listed above you could have super charger but with the piston ring lands being so close to the top and the compression ratio being as high as it is you have to keep the boost pretty low or you will grenade the thing. (as many already have)
I won't be going to a supercharger until I can rebuild the engine with forged internals and lower the compression ratio to something better suited for super charging.
The other advantage to going the NA route is that you can slowly build it up as you can afford it. Then if you ever do go with a super charger you will get the FULL benifit from it. You will never see the full effect of a super charger with the stock exhaust manifolds, cams or heads. Many of us don't have several thousand bucks to dump into our cars all at once such as you do when you buy a super charger.
So yes initially it may be more cost effective to just slap a supercharger on an othwerwise stock engine but anything more than 5 - 6 psi and you are asking for trouble.
I dunno I am no expert on supecharging but these are my opinions, take 'em or leave 'em.
The last poster has a valid point although there's more to be considered. First of all 400 hp n/a IS possible from these motors while retaining stock like driveability. You don't need really wild cams to do it. Not long after the S197 came out Livernois motorsports got 380 hp from a 3v 4.6 using long tube headers, off road H-pipe, a good air intake and ported heads on stock cams. This isn't too far off the 400 hp mark and even mild cams combined with the other changes would get the additional 20 hp to make 400 hp at the crank.
True, for not much more than the mods listed above you could have super charger but with the piston ring lands being so close to the top and the compression ratio being as high as it is you have to keep the boost pretty low or you will grenade the thing. (as many already have)
I won't be going to a supercharger until I can rebuild the engine with forged internals and lower the compression ratio to something better suited for super charging.
The other advantage to going the NA route is that you can slowly build it up as you can afford it. Then if you ever do go with a super charger you will get the FULL benifit from it. You will never see the full effect of a super charger with the stock exhaust manifolds, cams or heads. Many of us don't have several thousand bucks to dump into our cars all at once such as you do when you buy a super charger.
So yes initially it may be more cost effective to just slap a supercharger on an othwerwise stock engine but anything more than 5 - 6 psi and you are asking for trouble.
I dunno I am no expert on supecharging but these are my opinions, take 'em or leave 'em.
I have about 400 at the crank (see sig). Even with my wild and wooly cams, the street manners are exceptional.I was afraid it would be impossible to drive in traffic, but it's actually quite tame - 'til I get on it. Yes, SC is cheaper, but requires a huge cash outlay all at once. Plus, you just can't beat the old school sound of cams loping.
4th Gear Member
Joined: Feb 2005
Posts: 1,660
From: houston, tx
RE: 400hp
a dyno showing 400+ would mean a car putting down over 460HP to the crank...i doubt you are gonna find anybody with a dyno sheet showing that with a N/A mustang. you need to be asking for a dyno sheet showing 340RWHP. That would be around 400 to the crank. In that case, I bet you can find plenty that can show you that.
My dyno sheet shows 315RWHP and that was before I got some of the mods put on. The last time I got pulled, I was putting down 330RWHP and that is without cams. Throw some cams on there and I will be well over 400HP to the crank.
Ona side note, now I wish I would have just bought aSaleen blower and called it good. more power and cheaper than what i spent. dont get me wrong, i love my car but there are much easier ways to geta lot of power.
My dyno sheet shows 315RWHP and that was before I got some of the mods put on. The last time I got pulled, I was putting down 330RWHP and that is without cams. Throw some cams on there and I will be well over 400HP to the crank.
Ona side note, now I wish I would have just bought aSaleen blower and called it good. more power and cheaper than what i spent. dont get me wrong, i love my car but there are much easier ways to geta lot of power.
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