Lost horsepower - Mustang Evolution

Go Back   Mustang Evolution > Ford Mustang | Wrenching, Care and General Topics > Mustang DIY and Technical



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 06-27-2014, 03:59 PM   #1
Registered Member
Regular
 
phillip433's Avatar
 
Join Date: May 2014
Posts: 253
Lost horsepower

So I put about 10000 miles on it since I last bought it from previous dealer. Few mods, stage 2 cams, 3.73 gears, long tubes headers. Stage 3 spec 2 clutch,tune, exhaust, yatta yatta yatta, anyway. I raced a few STOCK GTs and they either beat Me or keep up with me... I just bought nitrous and I plan on putting it on but Obviously my 2003 gt isn't running at its full potential so I'm holding that off for awhile. Also my gas mileage could improve. I already replaced the spark plugs, just bought accel coil packs, going to get a fuel filter today after work, anything else I should look into? Is a compression test necessary for this kind of thing, bad tune? Any possibilities why I'm not making the amount of hp I should be making. Thanks
phillip433 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-27-2014, 04:05 PM   #2
Registered Member
Regular
 
Rapinator126's Avatar
 
Join Date: Dec 2011
Region: Texas
Posts: 9,260
Quote:
Originally Posted by phillip433 View Post
So I put about 10000 miles on it since I last bought it from previous dealer. Few mods, stage 2 cams, 3.73 gears, long tubes headers. Stage 3 spec 2 clutch,tune, exhaust, yatta yatta yatta, anyway. I raced a few STOCK GTs and they either beat Me or keep up with me... I just bought nitrous and I plan on putting it on but Obviously my 2003 gt isn't running at its full potential so I'm holding that off for awhile. Also my gas mileage could improve. I already replaced the spark plugs, just bought accel coil packs, going to get a fuel filter today after work, anything else I should look into? Is a compression test necessary for this kind of thing, bad tune? Any possibilities why I'm not making the amount of hp I should be making. Thanks
What year gt 's? bc if it's the 11+ 5.0 your still down at least 70-90 hp from a bone stock 5.0.

Sent from my SAMSUNG-SM-G870A using Mustang Evolution mobile app
Rapinator126 is online now   Reply With Quote
Old 06-27-2014, 04:06 PM   #3
Registered Member
Regular
 
phillip433's Avatar
 
Join Date: May 2014
Posts: 253
Lost horsepower

I have a 2003 and all the others ones I lost to was 99-04 GTs ... I know better nt to race a 5.0
phillip433 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-27-2014, 04:25 PM   #4
Registered Member
Regular
 
Rapinator126's Avatar
 
Join Date: Dec 2011
Region: Texas
Posts: 9,260
Quote:
Originally Posted by phillip433 View Post
I have a 2003 and all the others ones I lost to was 99-04 GTs ... I know better nt to race a 5.0
Well then something is definitely wrong. Who are you tuned by?

Sent from my SAMSUNG-SM-G870A using Mustang Evolution mobile app
Rapinator126 is online now   Reply With Quote
Old 06-27-2014, 04:59 PM   #5
Registered Member
Regular
 
phillip433's Avatar
 
Join Date: May 2014
Posts: 253
Dv8 performance put my car on a dyno and gave me a 87 and a 93 octane tune on my sct tuner. Currently running 87 now with 93 octane. At the time. I was running 93 octane tune with 93 octane.
phillip433 is offline   Reply With Quote
Old 06-27-2014, 05:26 PM   #6
Registered Member
Regular
 
Rapinator126's Avatar
 
Join Date: Dec 2011
Region: Texas
Posts: 9,260
What kind of power did it put down?

Sent from my SAMSUNG-SM-G870A using Mustang Evolution mobile app
Rapinator126 is online now   Reply With Quote
Old 06-28-2014, 03:47 AM   #7
Registered User
Newbie
 
clark_kent91's Avatar
 
Join Date: May 2014
Posts: 16
I'd look into a new throttle body around an 85mm and get it pro tuned.
clark_kent91 is offline   Reply With Quote
Old 06-29-2014, 04:11 PM   #8
Registered Member
Regular
 
phillip433's Avatar
 
Join Date: May 2014
Posts: 253
I don't know the dyno specs because it was dynoed by the previous owner.

---------- Post added at 09:11 PM ---------- Previous post was at 09:11 PM ----------

And will the tb make that much if a difference?
phillip433 is offline   Reply With Quote
Old 06-29-2014, 04:34 PM   #9
Registered Member
Regular
 
2 Stangz's Avatar
 
Join Date: Sep 2013
Location: Las Vegas
Region: Nevada
Posts: 2,093
How much weight have you gained since you bought the car?
__________________
2010 GT Premium - Automatic - Torch Red
2 Stangz is offline   Reply With Quote
Old 06-29-2014, 04:40 PM   #10
Registered Member
Regular
 
Rapinator126's Avatar
 
Join Date: Dec 2011
Region: Texas
Posts: 9,260
Throttle body will not fix your problem lol

No a compression test and a leak down.
If all I'd good bring it to a good shop and put it on the dyno and work on the tune

Sent from my SAMSUNG-SM-G870A using Mustang Evolution mobile app

---------- Post added at 04:40 PM ---------- Previous post was at 04:40 PM ----------

* do a

Sent from my SAMSUNG-SM-G870A using Mustang Evolution mobile app
Rapinator126 is online now   Reply With Quote
Old 06-29-2014, 06:25 PM   #11
Registered Member
Regular
 
phillip433's Avatar
 
Join Date: May 2014
Posts: 253
That's what I was thinking. I think it's all on the tune.
phillip433 is offline   Reply With Quote
Old 06-30-2014, 02:02 AM   #12
Registered User
Newbie
 
clark_kent91's Avatar
 
Join Date: May 2014
Posts: 16
Throttle body would be my next upgrade it won't fix ur issue or add that much power but it will improve throttle response .
clark_kent91 is offline   Reply With Quote
Old 06-30-2014, 03:05 AM   #13
Registered Member
Regular
 
Hellish Horse's Avatar
 
Join Date: Apr 2012
Region: Arizona
Posts: 796
Are you running cats ? Are you sure one of them aren't going out if you are? You will lose a lot of power when they start to go...or at least I did. After changing them...it was All Good again.
Maybe one of them is clogged.
Hellish Horse is offline   Reply With Quote
Old 06-30-2014, 03:49 AM   #14
Registered Member
Regular
 
phillip433's Avatar
 
Join Date: May 2014
Posts: 253
Bbk long tunes > o/r xpipe to flowmaster 40 series. No cats.
phillip433 is offline   Reply With Quote
Old 06-30-2014, 03:15 PM   #15
Registered Member
Regular
 
Hellish Horse's Avatar
 
Join Date: Apr 2012
Region: Arizona
Posts: 796
Well that eliminates the Cats for sure. I take it the car was running fine after you did your mods ? Sounds like you drove it for a while & even had a few races ? I'm kind of wondering if you might have a leaky Head Gasket, Warped Head or something like that.
I'd do a compression check just to eliminate that. $29.95 at Harbor Freight. Not top quality...but how many times do you think you'll use it? I'm only saying this because if your car was running fine with the Tune you had & then started losing H.P. later ...I just can't see it being your Tune unless you added more mods.
Hellish Horse is offline   Reply With Quote
Old 06-30-2014, 03:17 PM   #16
Registered Member
Regular
 
Hellish Horse's Avatar
 
Join Date: Apr 2012
Region: Arizona
Posts: 796
Scotty will eventually jump in on this. I'm sure he'll point you in the right direction.
Hellish Horse is offline   Reply With Quote
Old 06-30-2014, 03:25 PM   #17
Registered Member
Regular
 
Hellish Horse's Avatar
 
Join Date: Apr 2012
Region: Arizona
Posts: 796
Wait a minute...Am I reading this right? You're running 87 Octane Gas on a 93 Octane Tune? If you are I'm guessing that's your problem.
Hellish Horse is offline   Reply With Quote
Old 07-04-2014, 01:53 PM   #18
Registered Member
Regular
 
phillip433's Avatar
 
Join Date: May 2014
Posts: 253
Lost horsepower

No no no no. 89 tune with 93 octane fuel on my tank.
phillip433 is offline   Reply With Quote
Old 07-04-2014, 02:00 PM   #19
Registered Member
Regular
 
phillip433's Avatar
 
Join Date: May 2014
Posts: 253
The previous owner bought brand new heads. That might be a problem there. They took the oil pan off and put it back on. And it's leaking around there. The whole engine is covered in oil but its not where it effects the oil level in the engine. I recently had to take the valve covers off to replace a broken valve spring and that's when I noticed they had brand new heads.
phillip433 is offline   Reply With Quote
Old 07-08-2014, 04:12 PM   #20
Registered Member
Regular
 
phillip433's Avatar
 
Join Date: May 2014
Posts: 253
So I got a 75mm throttle body and also 24lb fuel injectors. Seems to have quite more power. I think i still can get more out of her. I'm goig to put it on the dyno next week to see what the numbers are.
phillip433 is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > Ford Mustang | Wrenching, Care and General Topics > Mustang DIY and Technical

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
My horsepower is faster than your horsepower Lalayla The Bar 24 03-17-2011 10:12 PM
Lost horsepower. Need help! DarkShadows 1996-2004 Mustang GT 10 11-22-2010 08:13 AM
Kobe Bryant has lost some weight. MusclesFromBrussels The Bar 11 11-08-2003 01:30 PM
America Has Lost one of Its Greatest Rellik The Bar 1 07-28-2003 01:08 PM
WOOHOO!! I barely lost to a CIVIC HATCHBACK! BlackStang232 Pre-2005 V6 Mustang 19 07-25-2003 04:28 PM

» Like Us On Facebook



08:29 PM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.