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#1206155 - 06/07/07 09:12 PM How much HP/TQ can our cranks handle
Quickvic30 Offline
Just watchin
Grand Poobah

Registered: 02/24/05
Posts: 10922
Loc: Minneapolis, MN
Just as stated what can a 4.6 crankshaft handle for power, 600-700 hp or no. The forged cobra can handle some power but I was wondering about ours.
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#1206279 - 06/07/07 10:49 PM Re: How much HP/TQ can our cranks handle [Re: Quickvic30]
Dan The Vic Man Offline
Poobah

Registered: 11/22/03
Posts: 9890
Loc: Coon Rapids MN
LOL not enough!
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2012 Ford F150 Ecoboost

1998 mercury Grand Marquis, 58k miles slower than a turtle stock as stock gets

RIP 99 CVPI

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#1206283 - 06/07/07 10:55 PM Re: How much HP/TQ can our cranks handle [Re: Quickvic30]
BigJon Offline

Grand Poobah

Registered: 06/30/02
Posts: 11804
Loc: Virginia
 Originally Posted By: Quickvic30
Just as stated what can a 4.6 crankshaft handle for power, 600-700 hp or no. The forged cobra can handle some power but I was wondering about ours.


at least 500hp that i know of.
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-Current:
2001 Crown Victoria P74

-Gone, but not forgotten:
1988 Mercury Grand Marquis
1994 Ford Crown Victoria
2000 Ford Crown Victoria HPP
2004 Ford Crown Victoria LX Sport
2004 Mercury Grand Marquis

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#1206347 - 06/07/07 11:44 PM Re: How much HP/TQ can our cranks handle [Re: BigJon]
Not_Gramps_Marq Offline
Over the Hill

Registered: 04/04/06
Posts: 1484
Loc: Southeastern, Wi
Fox Lake Power claims that their motors will take up to 700HP using the Stock Iron GT Crankshaft. I am sure it is safe to say 500.
_________________________
1999 Marquis LS. K&N Cone, 90mm Lightning MAF, 04 ZIP tube, Ported and polished upper plenum, Pro Prod polished intake manifold,
EGR delete, custom 2.5 inch exhaust with catless X-pipe and Magnaflow Muffs,. Stage 2 J-Mod, AMMX driveshaft, 3.73 gears with modified limited slip.
2005 GT rims with 1.5inch spacers and 255 series rubber

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#1206348 - 06/07/07 11:45 PM Re: How much HP/TQ can our cranks handle [Re: BigJon]
Georges93LX Offline

Over the Hill

Registered: 10/07/03
Posts: 1887
Loc: Owensboro, Ky.
I thought that the majic number was 400hp on stock internals. Everyone says you can't run a 9psi AED blower without the bottom being forged.

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#1206349 - 06/07/07 11:46 PM Re: How much HP/TQ can our cranks handle [Re: Georges93LX]
Dan The Vic Man Offline
Poobah

Registered: 11/22/03
Posts: 9890
Loc: Coon Rapids MN
Sure you can, it just depends on how old the motor is and how many miles are on it.
_________________________
2012 Ford F150 Ecoboost

1998 mercury Grand Marquis, 58k miles slower than a turtle stock as stock gets

RIP 99 CVPI

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#1206356 - 06/07/07 11:51 PM Re: How much HP/TQ can our cranks handle [Re: Dan The Vic Man]
Not_Gramps_Marq Offline
Over the Hill

Registered: 04/04/06
Posts: 1484
Loc: Southeastern, Wi
he asked about the crank. Not the rods and pistons!!!!!
When they say forged they are talking rods and pistons. Not usually the crank.
_________________________
1999 Marquis LS. K&N Cone, 90mm Lightning MAF, 04 ZIP tube, Ported and polished upper plenum, Pro Prod polished intake manifold,
EGR delete, custom 2.5 inch exhaust with catless X-pipe and Magnaflow Muffs,. Stage 2 J-Mod, AMMX driveshaft, 3.73 gears with modified limited slip.
2005 GT rims with 1.5inch spacers and 255 series rubber

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#1206380 - 06/08/07 12:11 AM Re: How much HP/TQ can our cranks handle [Re: Not_Gramps_Marq]
Quickvic30 Offline
Just watchin
Grand Poobah

Registered: 02/24/05
Posts: 10922
Loc: Minneapolis, MN
Yeah I bought some 4340 Manley H beams and some manley forged piston with 11cc dish. I want to know how much this crank can take.
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#1206384 - 06/08/07 12:13 AM Re: How much HP/TQ can our cranks handle [Re: Not_Gramps_Marq]
JCG1 Offline
Over the Hill

Registered: 07/03/03
Posts: 1725
Loc: Chicago
You shouldn't run forced induction on a stock bottom - lots of people do, but alot of people smoke 2 packs a day still.

Rods and pistons for sure. Crank too imNSho, but I've experienced boosted failure on cast internals and prefer not to make the same mistake twice.

Stock internals (including the rings and bearings, etc) are not rated, and were not setup, for the abuse that a poweradder applies to a motor.

Stock cranks have been found to be pretty reliable - certainly for a NA motor. I think I can count on one hand the number of 4.6 (hyperpathetic) crank failure threads or stories I've heard in the past 5 years. On the other hand, although heavy, a forged cobra crank is a pretty nice piece of balanced hardware, capable of some SERIOUS rpm.


Edited by JCG1 (06/08/07 12:16 AM)
_________________________
Former Ford Projects: 1967 Mustang w/transplant 351W : 1984 302 T-Bird : 1987 5.0 T-Bird : 1989 5.0 Mustang : 1992 5.0 T-Bird : Current: 2000 CVPI
Renegade Racing 4.6 SOHC: Cobra Crank, Manley Rods, Coated Diamond Pistons 10.5:1 comp w/valve reliefs, PnP npi heads, PI intake, Comp Cams, 70mm TB, MM Airbox/80mmMAF/04 Zip, 190lph walbro, FRPP shortys, custom 2.25 duals, Xcal2, Jmod RoadmasterTranz, Dirtyd0g TC.
14.46 @ 95.59 / 14.50 @ 95.91 tuned by Darrin at BC Automotive
Watch a 14.58 @ 94.13 Vid by DJChicago HERE

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#1206392 - 06/08/07 12:22 AM Re: How much HP/TQ can our cranks handle [Re: Quickvic30]
JCG1 Offline
Over the Hill

Registered: 07/03/03
Posts: 1725
Loc: Chicago
 Originally Posted By: Quickvic30
Yeah I bought some 4340 Manley H beams and some manley forged piston with 11cc dish. I want to know how much this crank can take.


Well, it'll certainly hold every bit of power those will put out NA. New or used? But what are you planning as far as a power-adder goes? The juice again? I'd think it'll hold as big a nitrous shot as you can stuff in a fogger - that's for sure.

The risk of an overrev is nil with the automatic: so that's another reason not to bother to err on the safe side with the cobra or other forged crank. You're not going to suddenly find yourself boosted up above 7grand.

Edit: the typical estimate on the depot is between 500-700hp with the 700 end being pretty much theoretical. Lots of guys in the 500's. The question would be the combination of a power-adder and high-rpms (assuming juice). This, again, argues for forged as a safety measure if you're doing it right.
Couple semi-recent threads on the "How much can a stock crank hold" debate.
Here and Here



Edited by JCG1 (06/08/07 12:43 AM)
_________________________
Former Ford Projects: 1967 Mustang w/transplant 351W : 1984 302 T-Bird : 1987 5.0 T-Bird : 1989 5.0 Mustang : 1992 5.0 T-Bird : Current: 2000 CVPI
Renegade Racing 4.6 SOHC: Cobra Crank, Manley Rods, Coated Diamond Pistons 10.5:1 comp w/valve reliefs, PnP npi heads, PI intake, Comp Cams, 70mm TB, MM Airbox/80mmMAF/04 Zip, 190lph walbro, FRPP shortys, custom 2.25 duals, Xcal2, Jmod RoadmasterTranz, Dirtyd0g TC.
14.46 @ 95.59 / 14.50 @ 95.91 tuned by Darrin at BC Automotive
Watch a 14.58 @ 94.13 Vid by DJChicago HERE

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#1206394 - 06/08/07 12:23 AM Re: How much HP/TQ can our cranks handle [Re: JCG1]
Quickvic30 Offline
Just watchin
Grand Poobah

Registered: 02/24/05
Posts: 10922
Loc: Minneapolis, MN
 Originally Posted By: JCG1
You shouldn't run forced induction on a stock bottom - lots of people do, but alot of people smoke 2 packs a day still.

Rods and pistons for sure. Crank too imNSho, but I've experienced boosted failure on cast internals and prefer not to make the same mistake twice.

Stock internals (including the rings and bearings, etc) are not rated, and were not setup, for the abuse that a poweradder applies to a motor.

Stock cranks have been found to be pretty reliable - certainly for a NA motor. I think I can count on one hand the number of 4.6 (hyperpathetic) crank failure threads or stories I've heard in the past 5 years. On the other hand, although heavy, a forged cobra crank is a pretty nice piece of balanced hardware, capable of some SERIOUS rpm.



Do you think it could handle about 300hp NA and then a 2 stage nitrous setup thats about a 275-300 shot, 175wet , with a dry125 stage on top.
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#1206781 - 06/08/07 03:29 PM Re: How much HP/TQ can our cranks handle [Re: Quickvic30]
Espey Offline
13 Second Club
Member

Registered: 09/22/06
Posts: 202
Loc: Chicagoland
I agree with the above post. If your going through the trouble of putting in rods and pistons, you should take care of the next weakest link, due to the huge increase in power you talking about. It sounds a like a very cool project.
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#1206806 - 06/08/07 04:07 PM Re: How much HP/TQ can our cranks handle [Re: Quickvic30]
kellydood Offline
Climber

Registered: 11/25/06
Posts: 958
Loc: nunayerdambusiness
 Originally Posted By: Quickvic30
 Originally Posted By: JCG1
You shouldn't run forced induction on a stock bottom - lots of people do, but alot of people smoke 2 packs a day still.

Rods and pistons for sure. Crank too imNSho, but I've experienced boosted failure on cast internals and prefer not to make the same mistake twice.

Stock internals (including the rings and bearings, etc) are not rated, and were not setup, for the abuse that a poweradder applies to a motor.

Stock cranks have been found to be pretty reliable - certainly for a NA motor. I think I can count on one hand the number of 4.6 (hyperpathetic) crank failure threads or stories I've heard in the past 5 years. On the other hand, although heavy, a forged cobra crank is a pretty nice piece of balanced hardware, capable of some SERIOUS rpm.



Do you think it could handle about 300hp NA and then a 2 stage nitrous setup thats about a 275-300 shot, 175wet , with a dry125 stage on top.

I think that looks good, but the 125 dry shot on top of the 175 wet might be a little unnecessary. I mean, you could get yourself a pair of fart tube mufflers and an APC windshield banner, and get pretty much the same gains.

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#1206822 - 06/08/07 04:29 PM Re: How much HP/TQ can our cranks handle [Re: JCG1]
Quickvic30 Offline
Just watchin
Grand Poobah

Registered: 02/24/05
Posts: 10922
Loc: Minneapolis, MN
 Originally Posted By: JCG1
 Originally Posted By: Quickvic30
Yeah I bought some 4340 Manley H beams and some manley forged piston with 11cc dish. I want to know how much this crank can take.


Well, it'll certainly hold every bit of power those will put out NA. New or used? But what are you planning as far as a power-adder goes? The juice again? I'd think it'll hold as big a nitrous shot as you can stuff in a fogger - that's for sure.

The risk of an overrev is nil with the automatic: so that's another reason not to bother to err on the safe side with the cobra or other forged crank. You're not going to suddenly find yourself boosted up above 7grand.

Edit: the typical estimate on the depot is between 500-700hp with the 700 end being pretty much theoretical. Lots of guys in the 500's. The question would be the combination of a power-adder and high-rpms (assuming juice). This, again, argues for forged as a safety measure if you're doing it right.
Couple semi-recent threads on the "How much can a stock crank hold" debate.
Here and Here




Thanks for the links JCG1.
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#1206827 - 06/08/07 04:31 PM Re: How much HP/TQ can our cranks handle [Re: kellydood]
Quickvic30 Offline
Just watchin
Grand Poobah

Registered: 02/24/05
Posts: 10922
Loc: Minneapolis, MN
 Originally Posted By: kellydood
 Originally Posted By: Quickvic30
 Originally Posted By: JCG1
You shouldn't run forced induction on a stock bottom - lots of people do, but alot of people smoke 2 packs a day still.

Rods and pistons for sure. Crank too imNSho, but I've experienced boosted failure on cast internals and prefer not to make the same mistake twice.

Stock internals (including the rings and bearings, etc) are not rated, and were not setup, for the abuse that a poweradder applies to a motor.

Stock cranks have been found to be pretty reliable - certainly for a NA motor. I think I can count on one hand the number of 4.6 (hyperpathetic) crank failure threads or stories I've heard in the past 5 years. On the other hand, although heavy, a forged cobra crank is a pretty nice piece of balanced hardware, capable of some SERIOUS rpm.



Do you think it could handle about 300hp NA and then a 2 stage nitrous setup thats about a 275-300 shot, 175wet , with a dry125 stage on top.

I think that looks good, but the 125 dry shot on top of the 175 wet might be a little unnecessary. I mean, you could get yourself a pair of fart tube mufflers and an APC windshield banner, and get pretty much the same gains.


I want to make 600-700 horse at the tires, I don't think a 175 wet shot will get me there. I won't use the second stage unless I have to
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