5.0 Stock Bottom End Strength
Forums at Modded Mustangs
Home Register FAQ Members List Calendar Timeslips Blogs Garage Gallery Auto Loans Search Today's Posts Mark Forums Read Auto Escrow


Go Back   Forums at Modded Mustangs > Mustang Forums > 5.0 Mustangs

ModdedMustangs.com is the premier Ford Mustang Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack (1) Thread Tools
Old August 25th, 2010, 05:09 PM   1 links from elsewhere to this Post. Click to view. #1
Newbie
 
 
Join Date: Aug 2010
Posts: 11
CokerGT is on a distinguished road
iTrader: 0 reviews
Default

5.0 Stock Bottom End Strength


Hey guys, I was just curious if anyone knows how much the stock rotating assembly and block of a 5.0 can handle. I think I remember over 400rwhp is pushing it. What about rpm's? I have heard anything over 6,500 rpm's is too much strain on the motor. What do you think?
  Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old August 25th, 2010, 05:12 PM   #2
Hardcore Enthusiast
 
walt1120's Avatar
 
04 Stang 1.0Gallon V6
14.43 @96
 
Join Date: Mar 2010
Location: South Jersey
Posts: 2,267
walt1120 is a jewel in the roughwalt1120 is a jewel in the roughwalt1120 is a jewel in the rough
iTrader: 2 reviews
Default

Originally Posted by CokerGT View Post
Hey guys, I was just curious if anyone knows how much the stock rotating assembly and block of a 5.0 can handle. I think I remember over 400rwhp is pushing it. What about rpm's? I have heard anything over 6,500 rpm's is too much strain on the motor. What do you think?
are you talkin about a new 5.0..?
__________________
2004 Bolt on & Cammed 3.9L V6
  Reply With Quote Quick reply to this message
Old August 25th, 2010, 05:14 PM   #3
MM Fanatic
 
JBIGBOOTSY's Avatar
 
1990 LX hatch
 
Join Date: Aug 2006
Location: Hobart Indiana
Posts: 4,422
JBIGBOOTSY is just really niceJBIGBOOTSY is just really niceJBIGBOOTSY is just really niceJBIGBOOTSY is just really niceJBIGBOOTSY is just really nice
iTrader: 0 reviews
Default

big torque, or big rpm, or any combo of the two. I've seen a 270hp motor split, and have heard of people getting up to 700, im sure it all depends on the condition of the motor.
__________________

Bolt-on Abraham Lincoln Log motor. With extra wiring.
  Reply With Quote Quick reply to this message
Old August 25th, 2010, 05:20 PM   #4
Newbie
 
 
Join Date: Aug 2010
Posts: 11
CokerGT is on a distinguished road
iTrader: 0 reviews
Default

I was refering to the fox body 5.0's. I was curious on the potential of the stock assembly w/o anything forged steel or modified.
  Reply With Quote Quick reply to this message
Old August 25th, 2010, 05:25 PM   #5
Because SBF
 
69fastback's Avatar
 
1969 Mustang Mach 1
6.12@112
 
Join Date: Aug 2006
Location: Where the rays of light shine through my Shiner Bock bottle
Posts: 16,297
69fastback has much to be proud of69fastback has much to be proud of69fastback has much to be proud of69fastback has much to be proud of69fastback has much to be proud of69fastback has much to be proud of69fastback has much to be proud of69fastback has much to be proud of69fastback has much to be proud of69fastback has much to be proud of
iTrader: 0 reviews
Default

Originally Posted by JBIGBOOTSY View Post
big torque, or big rpm, or any combo of the two. I've seen a 270hp motor split, and have heard of people getting up to 700, im sure it all depends on the condition of the motor.
Something was terribly wrong with a motor that split at 270hp.
__________________
  Reply With Quote Quick reply to this message
Old August 25th, 2010, 05:40 PM   #6
Hardcore Enthusiast
 
Jobra's Avatar
 
2004 Cobra
11.4 @ 129 - Need cage
 
Join Date: Jan 2009
Location: MA
Posts: 2,117
Jobra has a spectacular aura aboutJobra has a spectacular aura about
iTrader: 1 reviews
Default

500 RWHP max.
__________________


NEW NUMBERS: 609/543
  Reply With Quote Quick reply to this message
Old August 25th, 2010, 06:08 PM   #7
Newbie
 
 
Join Date: Aug 2010
Posts: 11
CokerGT is on a distinguished road
iTrader: 0 reviews
Default

What about a max rpm that can be acheived safely w/o engine damage? Or simply put, what would be over-spinning it?
  Reply With Quote Quick reply to this message
Old August 25th, 2010, 06:11 PM   #8
Banned
 
 
Join Date: Aug 2008
Location: Phoenix,AZ
Posts: 3,014
93mustank will become famous soon enough93mustank will become famous soon enough
iTrader: 1 reviews
Default

Depends...not a set number...
__________________
PeteAndersonRacing.com
  Reply With Quote Quick reply to this message
Old August 25th, 2010, 06:17 PM   #9
Enthusiast
 
'88 Mustang GT
 
Join Date: Apr 2010
Location: Allentown, PA
Posts: 527
DigitalDC89 is on a distinguished road
iTrader: 0 reviews
Send a message via AIM to DigitalDC89
Default

this may not be true, but i read that the engine can spin up to 6k safely, but the stock valves will start to float around 5k due to the weak factory springs. any truth to that?
__________________
'02 Mustang GTm Convertible - N/A MHS Equipt Daily - 13.28 @ 100.3 1.955 60' (Before MHS parts)
'88 Mustang GTm - 1/4 Mile Build - 800rwhp Project
'97 Saturn SL2m - Ex-Nitrous Build - Back-Up Daily
  Reply With Quote Quick reply to this message
Old August 25th, 2010, 06:23 PM   #10
Newbie
 
 
Join Date: Aug 2010
Posts: 11
CokerGT is on a distinguished road
iTrader: 0 reviews
Default

Not over-spinning it for hp or shift points, rather the highest rpm that can be acheived w/o causing damage or running a heavy risk of destroying a motor all together. Kind of like a "DO NOT GO PAST THIS ENGINE SPEED" rule of thumb. I know the Ford Racing X and Z cams make power up to 6,500 rpm's. Is that a bit too much for the stock rotating assembly? Again, I am just curious on how much these little shortblocks can handle.
  Reply With Quote Quick reply to this message
Old August 25th, 2010, 07:27 PM   #11
I Post Entirely Way Too Much
 
FastStang91Lx's Avatar
 
1991 Mustang LX 5.0
 
Join Date: Jan 2010
Location: Minnesota
Posts: 6,990
FastStang91Lx is just really niceFastStang91Lx is just really niceFastStang91Lx is just really niceFastStang91Lx is just really niceFastStang91Lx is just really nice
iTrader: 2 reviews
Default

Originally Posted by 69fastback View Post
Something was terribly wrong with a motor that split at 270hp.
Bad balance???

Originally Posted by 93mustank View Post
Depends...not a set number...
This is the most true statement... Every motor is different. I could say 500, but you could easily break at 4. I repeat... EVERY MOTOR IS DIFFERENT. The balance has a lot to do with it too.
__________________
FastStang's Ongoing projects thread Click here!
  Reply With Quote Quick reply to this message
Old August 25th, 2010, 07:42 PM   #12
Newbie
 
 
Join Date: Aug 2010
Posts: 11
CokerGT is on a distinguished road
iTrader: 0 reviews
Default

Yeah, I agree. I know balance of the crank and condition of the engine play large roles in engine durability when racing. Still, if you had lets say, H/C/I on a well balanced motor that was running optimal with a strong valvetrain, would it be safe to take the stock bottom end components to 6,500 if the motor made peak power there? When is it a good time to upgrade the crank, rods, and pistons?
  Reply With Quote Quick reply to this message
Old August 25th, 2010, 08:10 PM   #13
Regular
 
1989 LX coupe 5.0L
 
Join Date: Dec 2007
Location: NS Canada
Posts: 496
89lx is on a distinguished road
iTrader: 0 reviews
Default

i beat on mine all day and its still going. first time ever to the track and i ran a best of 12.4 out of 3 passes and i make 296 to the wheels. ive also seen the tac go well above 6. mind you i dont care if this engine takes a shit
__________________
  Reply With Quote Quick reply to this message
Old August 25th, 2010, 08:25 PM   #14
I Post Entirely Way Too Much
 
FastStang91Lx's Avatar
 
1991 Mustang LX 5.0
 
Join Date: Jan 2010
Location: Minnesota
Posts: 6,990
FastStang91Lx is just really niceFastStang91Lx is just really niceFastStang91Lx is just really niceFastStang91Lx is just really niceFastStang91Lx is just really nice
iTrader: 2 reviews
Default

Stock rev limiter is 6250 rpms, so you don't have too much worry there. The only way to rectify that is with a chip removing it. Stock tachs are not accurate at all. I hit 6250 in my car when the tach says 7.
__________________
FastStang's Ongoing projects thread Click here!
  Reply With Quote Quick reply to this message
Old August 25th, 2010, 08:39 PM   #15
Newbie
 
 
Join Date: Aug 2010
Posts: 11
CokerGT is on a distinguished road
iTrader: 0 reviews
Default

Yeah, I hear ya'. The stock tach. has a mind of it's own. Sometimes I have actually seen my needle hesitate when downshifting. So, does every fox body 5.0 have a built in rev limiter at 6,250? I have a MSD 6AL w/a 6,200 pill, so I have never seen it go off.

Last edited by CokerGT; August 25th, 2010 at 08:42 PM.
  Reply With Quote Quick reply to this message
Old August 25th, 2010, 08:46 PM   #16
MM Fanatic
 
fogged306's Avatar
 
89 GT
 
Join Date: Apr 2007
Location: NY
Posts: 4,875
fogged306 has a spectacular aura aboutfogged306 has a spectacular aura aboutfogged306 has a spectacular aura about
iTrader: 2 reviews
Default

Every EFI fox does. At 6250, the computer pulls fuel.
  Reply With Quote Quick reply to this message
Old August 25th, 2010, 08:55 PM   #17
Regular
 
1989 LX coupe 5.0L
 
Join Date: Dec 2007
Location: NS Canada
Posts: 496
89lx is on a distinguished road
iTrader: 0 reviews
Default

Originally Posted by FastStang91Lx View Post
Stock rev limiter is 6250 rpms, so you don't have too much worry there. The only way to rectify that is with a chip removing it. Stock tachs are not accurate at all. I hit 6250 in my car when the tach says 7.
not going by the stock tach and the limiter is gone
__________________
  Reply With Quote Quick reply to this message
Old August 25th, 2010, 09:24 PM   #18
Newbie
 
 
Join Date: Aug 2010
Posts: 11
CokerGT is on a distinguished road
iTrader: 0 reviews
Default

Originally Posted by 89lx View Post
not going by the stock tach and the limiter is gone
Do you mean what if a 5.0 Mustang had an aftermarket tach. and the stock limiter was tuned out? I am still interested as well. Is there anyone out there running a stock bottom end and running numbers past 6,250 rpm?
  Reply With Quote Quick reply to this message
Old August 25th, 2010, 10:46 PM   #19
Enthusiast
 
92Notch's Avatar
 
1996 Cobra
Not fast enough.
 
Join Date: Feb 2010
Location: San Jose..408!
Posts: 778
92Notch is on a distinguished road
iTrader: 0 reviews
Default

Originally Posted by CokerGT View Post
Do you mean what if a 5.0 Mustang had an aftermarket tach. and the stock limiter was tuned out? I am still interested as well. Is there anyone out there running a stock bottom end and running numbers past 6,250 rpm?
Maybe a member "E3 SEAN" He runs basement 10's with the stock block if I'm not mistaken. He prbly spins it up to about that if not more
__________________

Mods: Full 01 Cobra drivetrain (Teksid block ) T56, 3.73s, Pro 5.0, Aluminum driveshaft, JLT CAI, BBK O/R X, SLP LM1s, Full welded in sub frame connectors
  Reply With Quote Quick reply to this message
Old August 26th, 2010, 06:21 AM   #20
Regular
 
1989 LX coupe 5.0L
 
Join Date: Dec 2007
Location: NS Canada
Posts: 496
89lx is on a distinguished road
iTrader: 0 reviews
Default

Originally Posted by CokerGT View Post
Do you mean what if a 5.0 Mustang had an aftermarket tach. and the stock limiter was tuned out? I am still interested as well. Is there anyone out there running a stock bottom end and running numbers past 6,250 rpm?
i have an aftermarket tac and have spun it abouve but its not making and power
__________________
  Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Forums at Modded Mustangs forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools


LinkBacks (?)
LinkBack to this Thread: http://www.moddedmustangs.com/forums/5-0-mustangs/180648-5-0-stock-bottom-end-strength.html
Posted By For Type Date
Thread 5.0 Stock Bottom End Strength | Forums at Modded Mustangs | BoardReader This thread Refback November 10th, 2010 11:47 PM

Threads Similar to: 5.0 Stock Bottom End Strength
Thread Thread Starter Forum Replies Last Post
Strength of Stock rear end w/ 3.73s MyGT 99 - 04 17 November 4th, 2008 05:17 PM
05+ vs 96-04 bottom end strength ? Quicktime_GT Modular Mustangs 7 December 26th, 2007 03:51 AM
How Much HP On Stock Bottom End 5litercobra 2.3 Mustangs 5 November 13th, 2007 02:55 PM
12s with stock bottom end? 95wip 94-95 8 April 16th, 2007 11:10 PM
How Much HP Can Stock GT Bottom End Take? Clutchmaster 99 - 04 14 March 22nd, 2007 03:58 PM



All times are GMT -4. The time now is 10:21 PM.
Modded Mustangs is ©2005-2008, All Rights Reserved, And is Not Affiliated with Ford Motor Company.
Forum is powered by vBulletin ©2000 - 2014, Jelsoft Ent. Ltd. & SEO by vBSEO 3.3.2 ©2009, Crawlability, Inc.

powered by vBulletin ©2000 - 2014, Jelsoft Ent. Ltd.