2.5 stroker crank questions..... - Ford Mustang Forum
LinkBack Thread Tools
post #1 of 3 (permalink) Old 01-14-2007 Thread Starter
smurfsracing's Avatar
Joined: Jan 2007
Location: Fall Creek
Posts: 2
2.5 stroker crank questions.....

Hi everyone I am new to this board! I am an experienced race engine builder/machinist, and I am just starting to play with these 2.3 engines. I am installing a 2.5 stroker crank in my engine, and I already have to have it ground for 2.0" rod journals. My question is: Can I offset grind the 2.5 crank to get even MORE stroke without running into interference issues?? I was just going to go ahead and do it, but it would be nice to know it will work before I ruin a crank, and have worthless custom made pistons. Any input would be appreciated! Thank you!
smurfsracing is offline  
Sponsored Links
post #2 of 3 (permalink) Old 01-15-2007
GT Member
2.3L Member
V6 Member
S197 Member
b_chandler's Avatar
Joined: Oct 2006
Location: Buford
Posts: 1,791
With the 2.0 rods it sounds like a race combo rather than a street setup. I don't know of anyone running the 2.0 rods on a cut 2.3 crank on the street. There are too many aftermarket rod setups for the 2.3 to mess with cutting the rod journals.

Depending on what vintage block you're using, 2.5L is as easy as a crank swap. The later 2.3/2.5 Lima motors shared the same block. The major difference between those blocks and they're older brethren was the main journal size. The later blocks (I'm thinking this started somewhere between '89 and '91. ) had a smaller main journal than the early blocks. I've heard of spacers being available to run the late crank in an early block, but I haven't heard where.

Anyway, on the stock crank arm, rods are available from the stock 5.2 up to 5.7" in length. Pistons are available with proper compression heights to work with those rods. I suppose a crafty machinist could offset grind those journals to increase stroke beyond 2.5 as you mentioned before. I've read about 2.7's I think Esslinger or someone along that line builds one.

If you proceed with the plan you've laid out, I think the only concern would be those of typical stroker builds. Rod to pan rail clearance and rod to bottom of bore clearance. I know the Crower rods are shaped better on the big end than the stock rods and may afford you some clearance there, either way, I don't think it's anything a die grinder can't cure. Hey at least you don't have to worry about the cam being in the way.
b_chandler is offline  
post #3 of 3 (permalink) Old 04-22-2008
RacerRose's Avatar
Joined: Apr 2008
Location: Martinsburg
Posts: 1
Offset grind the crank to use the 1.880 Honda rod journal size, and that makes your 2700 cc combo. Richard Johnson sells this assembly for around $1900.
RacerRose is offline  
Sponsored Links
Closed Thread

Quick Reply

Register Now

In order to be able to post messages on the Ford Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a VALID email address for yourself, otherwise you will not receive the necessary confirmation email needed to confirm, validate and activate your new AFM member account.

Failure to provide a VALID email address, will result in the cancellation of your new AFM member account registration.

Email Address:


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
Show Printable Version Show Printable Version
Email this Page Email this Page

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

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

For the best viewing experience please update your browser to Google Chrome