289 HP Increase after rebuild? - MustangForums.com

Classic Mustangs (Tech) Technical discussions about the Mustangs of yester-year.

Thread Tools Search this Thread
Old 08-19-2007, 01:38 AM   #1
2nd Gear Member
Thread Starter
Join Date: May 2007
Posts: 159
Default 289 HP Increase after rebuild?

Could anyone tell me if there are any significant driving changes, such as power when it comes to an engine being rebuilt properly? My 289 that threw a rod comes back from the shop Monday so i can put it back in and was wondering if there will be any noticable HP increase, with the slightly bigger touque cam and re-honed cylinders and what-not...Just wondering, never done this before! thanks

P.S. Either way, it will def. be back and funnnnn to drive: 289, tri-y headers, stock 289 heads, 570 street avenger holley, glass packs, etc.
restomod87 is offline   Reply With Quote
Old 08-19-2007, 01:45 AM   #2
6th Gear Member
Join Date: Apr 2007
Location: California
Posts: 10,468
Default RE: 289 HP Increase after rebuild?

With stock heads it'd not gonna be night and day(unless the old engine was running on dead cylinders with crap compression). With a little bit of a cam you'll notice it'll run better, should be a bit more peppy and seem a little quicker, but it won't be anything huge. Now, if you have a decent cam in it, and put some good heads on, that'll be worth anywhere from 50-100hp. Just make sure you break your new cam in properly if it's flat tappet(if it is, then shame on you for not going with a roller cam [8D])
67mustang302 is offline   Reply With Quote
Old 08-19-2007, 12:22 PM   #3
3rd Gear Member
Join Date: Aug 2007
Posts: 572
Default RE: 289 HP Increase after rebuild?

until it loosens up it may feel slower if your 289 was running good before.
htwheelz67 is offline   Reply With Quote
Old 08-19-2007, 12:27 PM   #4
6th Gear Member
my77stang's Avatar
Join Date: Dec 2006
Location: Citrus County, FL
Posts: 8,007
Default RE: 289 HP Increase after rebuild?

i think he'll notice a bump. usually replacing a 40 year old motor with a fresh one is worth something all by iteself. add in the slightly larger cam, the holley, better exhaust and he should be pretty damn happy once he breaks it in and can get on it
my77stang is offline   Reply With Quote
Old 08-19-2007, 03:59 PM   #5
5th Gear Member
Join Date: Jun 2006
Posts: 4,089
Default RE: 289 HP Increase after rebuild?

A blue-printed/balanced engine will give quite a hp increase, actually. But, if it isn't specified, most shops won't do both to the degree really needed to make that difference.
Colorado_Mustang is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Bad cylinder? Dathan V6 (1994-2004) Mustangs 4 10-05-2015 06:52 AM
cost to rebuild heads Drastang 4.6L (1996-2004 Modular) Mustang 2 09-30-2015 04:48 AM
OBD: The Adventure Begins (PO402 and PO401), DPFE/EGR test procedures TfcCDR V6 (1994-2004) Mustangs 1 09-14-2015 01:08 PM
ford 289 ryland Mustang News, Concepts, Rumors & Discussion 0 09-13-2015 01:35 PM
How to increase Lateral Gs in 2015 GT? mungodrums Suspension 0 09-07-2015 08:30 PM

289, horsepower, hp, increase, motor, mustang, rebuil, rebuild, rebuilt

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 Off
Refbacks are Off

Forum Jump

Featured Sponsors
Vendor Directory

All times are GMT -5. The time now is 08:45 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.