How much hp from stock cast crank?

tbird88tbo · October 28th, 2009, 08:03 PM

Does anyone have any info on how much hp a stock cast crank can handle? I have heard that it can withstand upwards of 800hp just fine. Anyone have any info to back this up with?

Im going to be doing a rebuild soon and would like to make around 600hp to the wheels. I know a forged crank would be the best way to go but that will cost me about $700 more because i will have to get a new aluminum flywheel with an 8 bolt pattern. So if i dont need to i wont.

Anyways, let me know what you people think!

ranger11x · October 28th, 2009, 10:06 PM

correct me if im wrong someone.. but i believe 700hp(crank) is the safe area for our cranks i wouldnt try above that so you should be fine ive seen cobras with more but i have no idea if that bottom end is the same as a a regular gt

330CubeGt · October 28th, 2009, 10:18 PM

400-425 is the limit

tbird88tbo · October 28th, 2009, 10:29 PM

Can anyone back up their opinions with some builds, dyno slips, ect...

SWEET2KSTANG · October 28th, 2009, 10:45 PM

Originally Posted by 330CubeGt

400-425 is the limit

not for the crank

Originally Posted by tbird88tbo

Can anyone back up their opinions with some builds, dyno slips, ect...

people have put 650rwhp thru them all day long. ton of people getting 600rwhp, most ok builds (budget minded) are still on stock crank. if going past 650, i reccommend going to a forged piece.

330CubeGt · October 28th, 2009, 11:00 PM

Originally Posted by SWEET2KSTANG

not for the crank.

Not for the Crank no The Rods Yes... I did not see any information about rods so i just assumed he was talking stock crank rods etc.Maybe if he gave a little more information i could give him a better answer but since information was limited thats why i said 400-425 just to be safe.

330CubeGt · October 28th, 2009, 11:03 PM

Originally Posted by tbird88tbo

Can anyone back up their opinions with some builds, dyno slips, ect...

Just say someone dynos there car and it makes 800RWHP and it has a stock crank, the dyno sheet don't mean shit when it spits the crank in the street the following week.You can make it make 800RWHP with a stock crank but it will never stay together.

SWEET2KSTANG · October 29th, 2009, 03:39 AM

treated stock crank will. stock cranks are very very stout. like i said before, 650+rwhp, then go ahead and invest into a forged piece. if 650 and under, just run the stocker.

tbird88tbo · October 30th, 2009, 12:00 AM

what do you mean by "s treated"?

takiller · October 30th, 2009, 01:50 AM

Originally Posted by SWEET2KSTANG

not for the crank

people have put 650rwhp thru them all day long. ton of people getting 600rwhp, most ok builds (budget minded) are still on stock crank. if going past 650, i reccommend going to a forged piece.

yea man if you do a little more research around the web you'll find out our cranks are pretty dang good.

sean hyland motorsports in their "High-Performance Mustang Build…"
he claims that our cranks can hold up to 700 hp.

but then again...who knows maybe sean hyland doesnt know what hes talking about

takiller · October 30th, 2009, 01:52 AM

and for the record cobra's have the forged steel crankshaft....once again quoted from Mr. Sean Hyland himself.

SWEET2KSTANG · October 30th, 2009, 02:54 AM

Originally Posted by tbird88tbo

what do you mean by "treated"?

cast cranks can be treated for more strength.

Originally Posted by takiller

yea man if you do a little more research around the web you'll find out our cranks are pretty dang good.

sean hyland motorsports in their "High-Performance Mustang Build…"
he claims that our cranks can hold up to 700 hp.

but then again...who knows maybe sean hyland doesnt know what hes talking about

sean hyland.........eh..............yes and no. there are a lot of things that isnt 100% correct.

takiller · October 30th, 2009, 02:58 AM

+1 ^ i agree not everything is 100%. but we can easly conclude that people are running 600hp all day. in a few cases of the people ive talked to, they were all putting 600 ish hp to the wheel on a stock crank. and their cars are still runnning like champs

SWEET2KSTANG · October 30th, 2009, 03:00 AM

^right. i would personally wouldnt push much more than 650rwhp thru one.

tbird88tbo · October 30th, 2009, 07:46 PM

So, basically my rwhp goal of 600 should be fine on the stock crank...and yes i will be using forged rods and pistons.

SWEET2KSTANG · October 30th, 2009, 09:09 PM

you will be fine.

96StangGT4 · October 31st, 2009, 11:27 AM

yea and if you do ever blow your bottom end out god forbid, use that as an excuse to put forged in.

tbird88tbo · October 31st, 2009, 02:53 PM

Speaking of blowing out the bottom end, what actually happens? I would guess that it would damage more than just the crank but i have never seen this since most of the cars i deal with day to day are just peoples daily drivers, few of which even have sports cars. And of the ones who do have sports cars non of them drive them the way they are ment to be driven...fast and hard...if they did i would know.

If anyone has pictures of a blown bottom end that would be great.(sorry in advance if it is from your car, but congrats at the same time...battle scars are awsome after they heal!)

To me there is nothing cooler then a car that gets used, abused, fixed, abused again, fixed again, ect...like mine. I cant stand trailer cars! They are nice and cool to look at, but otherwise pointless and boaring.

tbird88tbo · October 31st, 2009, 02:58 PM

btw, sweet2kstang, i still dont know what you mean by treated crank. What exactly is the process. Is it just getting you rotating assembly balanced or does it involve some kind of case harding heating process, or coatings maybe? Please explain.

96StangGT4 · October 31st, 2009, 03:06 PM

Originally Posted by tbird88tbo

Speaking of blowing out the bottom end, what actually happens? I would guess that it would damage more than just the crank but i have never seen this since most of the cars i deal with day to day are just peoples daily drivers, few of which even have sports cars. And of the ones who do have sports cars non of them drive them the way they are ment to be driven...fast and hard...if they did i would know.

If anyone has pictures of a blown bottom end that would be great.(sorry in advance if it is from your car, but congrats at the same time...battle scars are awsome after they heal!)

To me there is nothing cooler then a car that gets used, abused, fixed, abused again, fixed again, ect...like mine. I cant stand trailer cars! They are nice and cool to look at, but otherwise pointless and boaring.

just depends really, it could be really bad or it can be all internal, one part or several. depends on how lucky you are lol, but seriously, it varies

October 28th, 2009, 08:03 PM	#1
tbird88tbo Regular 1998 Mustang Base Model Join Date: Feb 2009 Posts: 54	How much hp from stock cast crank? Does anyone have any info on how much hp a stock cast crank can handle? I have heard that it can withstand upwards of 800hp just fine. Anyone have any info to back this up with? Im going to be doing a rebuild soon and would like to make around 600hp to the wheels. I know a forged crank would be the best way to go but that will cost me about $700 more because i will have to get a new aluminum flywheel with an 8 bolt pattern. So if i dont need to i wont. Anyways, let me know what you people think!

October 28th, 2009, 10:06 PM	#2
ranger11x Newbie Join Date: Oct 2009 Location: houston tx Posts: 11	correct me if im wrong someone.. but i believe 700hp(crank) is the safe area for our cranks i wouldnt try above that so you should be fine ive seen cobras with more but i have no idea if that bottom end is the same as a a regular gt __________________ 95 jdm swapped accord-R.I.P 97 modded GTP-SOLD Μολὼν λαβέ

October 28th, 2009, 10:18 PM	#3
330CubeGt MM Fanatic 1998 Mustang GT 1996 Mustang V6 Join Date: Dec 2007 Location: Orlando Posts: 3,396	400-425 is the limit __________________ Boosted Auto 5.4 (Stock Specs) 380 @ 4750 RPM 450 @ 3250 RPM If its Fast and reliable, it ain't cheap. If its Cheap and reliable, it ain't fast. If its Fast and cheap, it ain't reliable.

October 29th, 2009, 03:39 AM	#8
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 Join Date: Oct 2006 Location: N.W. AR Posts: 8,987	treated stock crank will. stock cranks are very very stout. like i said before, 650+rwhp, then go ahead and invest into a forged piece. if 650 and under, just run the stocker. __________________ right now, she is a jackstand warrior if the car was a horse, i would shoot it!!! project warhorse under construction Last edited by SWEET2KSTANG : October 30th, 2009 at 02:54 AM.

October 30th, 2009, 01:52 AM	#11
takiller Regular 2003 Mustang GT 9.0 in the 8th Join Date: Aug 2007 Location: Texas Posts: 455	and for the record cobra's have the forged steel crankshaft....once again quoted from Mr. Sean Hyland himself. __________________ What was that you were saying about power to weight ratio? Thats what I thought.

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October 28th, 2009, 10:29 PM	#4
tbird88tbo Regular 1998 Mustang Base Model Join Date: Feb 2009 Posts: 54	Can anyone back up their opinions with some builds, dyno slips, ect...

October 30th, 2009, 12:00 AM	#9
tbird88tbo Regular 1998 Mustang Base Model Join Date: Feb 2009 Posts: 54	what do you mean by "s treated"?

October 30th, 2009, 02:58 AM	#13
takiller Regular 2003 Mustang GT 9.0 in the 8th Join Date: Aug 2007 Location: Texas Posts: 455	+1 ^ i agree not everything is 100%. but we can easly conclude that people are running 600hp all day. in a few cases of the people ive talked to, they were all putting 600 ish hp to the wheel on a stock crank. and their cars are still runnning like champs __________________ What was that you were saying about power to weight ratio? Thats what I thought.

October 30th, 2009, 03:00 AM	#14
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 Join Date: Oct 2006 Location: N.W. AR Posts: 8,987	^right. i would personally wouldnt push much more than 650rwhp thru one. __________________ right now, she is a jackstand warrior if the car was a horse, i would shoot it!!! project warhorse under construction

October 30th, 2009, 07:46 PM	#15
tbird88tbo Regular 1998 Mustang Base Model Join Date: Feb 2009 Posts: 54	So, basically my rwhp goal of 600 should be fine on the stock crank...and yes i will be using forged rods and pistons.

October 30th, 2009, 09:09 PM	#16
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 Join Date: Oct 2006 Location: N.W. AR Posts: 8,987	you will be fine. __________________ right now, she is a jackstand warrior if the car was a horse, i would shoot it!!! project warhorse under construction

October 31st, 2009, 02:53 PM	#18
tbird88tbo Regular 1998 Mustang Base Model Join Date: Feb 2009 Posts: 54	Speaking of blowing out the bottom end, what actually happens? I would guess that it would damage more than just the crank but i have never seen this since most of the cars i deal with day to day are just peoples daily drivers, few of which even have sports cars. And of the ones who do have sports cars non of them drive them the way they are ment to be driven...fast and hard...if they did i would know. If anyone has pictures of a blown bottom end that would be great.(sorry in advance if it is from your car, but congrats at the same time...battle scars are awsome after they heal!) To me there is nothing cooler then a car that gets used, abused, fixed, abused again, fixed again, ect...like mine. I cant stand trailer cars! They are nice and cool to look at, but otherwise pointless and boaring.

October 31st, 2009, 02:58 PM	#19
tbird88tbo Regular 1998 Mustang Base Model Join Date: Feb 2009 Posts: 54	btw, sweet2kstang, i still dont know what you mean by treated crank. What exactly is the process. Is it just getting you rotating assembly balanced or does it involve some kind of case harding heating process, or coatings maybe? Please explain.

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