How much HP/TQ can an M20 handle? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 10-25-2004, 02:25 PM
Member
 
Last photo:
Join Date: Sep 2004
Location: NY
Age: 50
Posts: 87
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
How much HP/TQ can an M20 handle?

??

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 10-25-2004, 02:44 PM
Henry Rifle's Avatar
Registered User
 
Join Date: Oct 2004
Location: Virginia Beach
Age: 71
Posts: 1
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Not sure, but one came stock in my '68 GTO - 350HP. Then I rebuilt the engine to Ram Air IV specs with about 450 HP and a 4.10 gear. Launched at 7000, shifted at 6500, ran 11.8's, never broke it.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 10-25-2004, 02:50 PM
Hotrodders.com Moderator
 

Last journal entry: PICTURE TEST
Last photo:
Join Date: Jan 2004
Location: york pa
Age: 52
Posts: 2,795
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
trans

How much H/P do you plan on running through it???

Street tires or slicks???

Keith
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 10-25-2004, 03:05 PM
Member
 
Last photo:
Join Date: Sep 2004
Location: NY
Age: 50
Posts: 87
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
possibly around 500 hp.

Maybe mickey E/T's
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 10-25-2004, 07:30 PM
302 Z28's Avatar  
Last photo:
Join Date: May 2003
Location: North Texas
Posts: 10,839
Wiki Edits: 0

Thanks: 1
Thanked 86 Times in 73 Posts
Depends on how well you hookup off the line if that what your going to do with it. The week link is the input shaft. Too much HP and torque and you will twist it off. It can easily handle 500HP if it's in good condition, and your careful with it.

Most people think that the M22 Rockcrusher is the stronger of the Muncie's. Only difference is the M22 had less of an angle (not straight cut) on the gears which reduced end loading on the mid plate. The different gear angle allowed the trans to run a little cooler also, but noisier.

Vince
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 10-26-2004, 06:23 AM
Hotrodders.com Moderator
 

Last journal entry: PICTURE TEST
Last photo:
Join Date: Jan 2004
Location: york pa
Age: 52
Posts: 2,795
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
trans

If your M20 is in good shape it will take 500hp during ocasional trips to the track. If you were planning on racing every weekend i would say to invest in a different transmission. One thing you will need to look at is the case where the pin that holds the cluster gear in goes through. This bore in the case needs to be a tight fit with that pin. Once the case gets sloppy here the pin will flex and allow the clearance between the input and the cluster to grow and cause busted teeth.I personally have never seen a muncie with a input twisted off. I have seen the splines twist though. 95% of the muncies that i have rebuilt that were hurt was from broken gears.

The M22 aka rockcrusher, had a few more things going for it then just the gear angle. The gears them selves were made from a different material the the standard M20/M21 transmissions. The gear contact angle also made the gear stronger and added more of a contact area in the pitch diameter of the gear.

Keith
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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 On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 06:54 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.