Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
Sign in using an external account
Register Forgot Password?


Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 11-29-2011, 04:54 PM
Ranger80's Avatar
Ranger80 Ranger80 is online now
Senior User
 
Join Date: Nov 2011
Location: Owensboro, KY
Posts: 323
Ranger80 is starting off with a positive reputation.
beastlybertram bertramlee1995
Max RPM for a 302?

Hello everyone, I was wondering what the max RPM would be on a totally stock 1980 302? Mine seems to top out around 4k (judjing by the factory tach), but I've heard they're good for over 6k. Thoughts? Thanks in advance!
Reply With Quote
  #2  
Old 11-29-2011, 06:07 PM
HemiEater's Avatar
HemiEater HemiEater is offline
Postmaster
 
Join Date: Jun 2005
Posts: 2,656
HemiEater is starting off with a positive reputation.
I've taken stock bottom ends to 6500 you just need a top end to make power there... just because it hits 6500 with a stock bottom end doesn't mean it will last forever... If you want a 7000 rpm motor you have to spend money, I built a 7500 rpm 302 (not sure how much power it made but he would hold on a 7500 chip stuck in the mud) with stock 5.0 crank, all ground smooth and shot peened, balanced, Scat I beam rods with forged pistons..

I have beat the death out of many 302 and the bottom ends (as long as they had oil pressure) stayed together... I have never seen a street 302 with a broken crank...
__________________
Whipple Survivor May 2008
Reply With Quote
  #3  
Old 11-29-2011, 06:26 PM
Beechkid Beechkid is offline
Moderator
 
Join Date: Aug 2002
Location: Southern California
Posts: 3,167
Beechkid is a splendid one to beholdBeechkid is a splendid one to beholdBeechkid is a splendid one to beholdBeechkid is a splendid one to beholdBeechkid is a splendid one to beholdBeechkid is a splendid one to behold
Quote:
Originally Posted by Ranger80 View Post
Hello everyone, I was wondering what the max RPM would be on a totally stock 1980 302? Mine seems to top out around 4k (judjing by the factory tach), but I've heard they're good for over 6k. Thoughts? Thanks in advance!
The cars....5500, trucks.......4400 give or take a little bit.
__________________
Member: Never trust a person over 40 who drives a Chevy club
Flatheads ain't so bad!
Certified backyard mechanic I & II
Reply With Quote
  #4  
Old 11-29-2011, 07:34 PM
Ranger80's Avatar
Ranger80 Ranger80 is online now
Senior User
 
Join Date: Nov 2011
Location: Owensboro, KY
Posts: 323
Ranger80 is starting off with a positive reputation.
beastlybertram bertramlee1995
Thanks for the quick replies. From what you are telling me, the 302 in the cars could hit around 5500 STOCK, is that correct? Mine is in a truck, however, I'm wondering, what's stopping me from hitting the same RPM as the 302 in cars? Is it a governor or something, or would I have to dig in to it a bit?
Reply With Quote
  #5  
Old 11-29-2011, 08:19 PM
HemiEater's Avatar
HemiEater HemiEater is offline
Postmaster
 
Join Date: Jun 2005
Posts: 2,656
HemiEater is starting off with a positive reputation.
Quote:
Originally Posted by Ranger80 View Post
Thanks for the quick replies. From what you are telling me, the 302 in the cars could hit around 5500 STOCK, is that correct? Mine is in a truck, however, I'm wondering, what's stopping me from hitting the same RPM as the 302 in cars? Is it a governor or something, or would I have to dig in to it a bit?

Cam, Exhaust, intake, Valve springs.... will be the limiting factors.. mostly valve springs... hold a stock 302 to the bellhousing and the valve float will hold it back..
__________________
Whipple Survivor May 2008
Reply With Quote
  #6  
Old 11-29-2011, 08:36 PM
baddad457 baddad457 is offline
Post Fiend
 
Join Date: May 2003
Location: south louisiana
Posts: 6,547
baddad457 has a good reputation on FTE.baddad457 has a good reputation on FTE.baddad457 has a good reputation on FTE.
Quote:
Originally Posted by Ranger80 View Post
Hello everyone, I was wondering what the max RPM would be on a totally stock 1980 302? Mine seems to top out around 4k (judjing by the factory tach), but I've heard they're good for over 6k. Thoughts? Thanks in advance!
The limiting parts in your case will be the block (80-85 302 blocks are the lightweights of the 302's check your casting numbers before spending any money on the motor, if it's got an E0AE block, it's garbage.), the cam, & valve springs. A roller 5.0 can be turned regularly to 7500 with good valve springs that will control the roller lifters, along with ARP rod bolts on stock C8OE rods. Of course you will also need better heads to let it breathe to get up there.
__________________
89 Ranger supercab-- 302-4bbl-- 4 speed 68 Mercury Monterey 390 4 bbl C-6 77 F100 400M C-6 67 Mustang fastback 427 2-4
Reply With Quote
  #7  
Old 11-29-2011, 08:50 PM
HemiEater's Avatar
HemiEater HemiEater is offline
Postmaster
 
Join Date: Jun 2005
Posts: 2,656
HemiEater is starting off with a positive reputation.
80-85 302 blocks are the lightweights....

You really have to be up there in the hp to worry about the lighter blocks you can still spin them right up there .. Any 302 block will hold up on the street... when you start adding forced induction, Nitrous, etc is where you start splitting them in half.. 500hp or so
Just saying ... my 2cents
__________________
Whipple Survivor May 2008
Reply With Quote
  #8  
Old 11-29-2011, 09:40 PM
baddad457 baddad457 is offline
Post Fiend
 
Join Date: May 2003
Location: south louisiana
Posts: 6,547
baddad457 has a good reputation on FTE.baddad457 has a good reputation on FTE.baddad457 has a good reputation on FTE.
Quote:
Originally Posted by HemiEater View Post
80-85 302 blocks are the lightweights....

You really have to be up there in the hp to worry about the lighter blocks you can still spin them right up there .. Any 302 block will hold up on the street... when you start adding forced induction, Nitrous, etc is where you start splitting them in half.. 500hp or so
Just saying ... my 2cents
The main problem with these blocks is getting the head gaskets to seal because of the thin decks, when you start to hotrod them. There are much better choices to pick from to even consider using one of these blocks.
__________________
89 Ranger supercab-- 302-4bbl-- 4 speed 68 Mercury Monterey 390 4 bbl C-6 77 F100 400M C-6 67 Mustang fastback 427 2-4
Reply With Quote
  #9  
Old 11-29-2011, 09:49 PM
Ranger80's Avatar
Ranger80 Ranger80 is online now
Senior User
 
Join Date: Nov 2011
Location: Owensboro, KY
Posts: 323
Ranger80 is starting off with a positive reputation.
beastlybertram bertramlee1995
Thanks guys. I'm not going to build this thing to be a street machine, just hoping to get a little more top end out of it. Where would I check for the casting number? Also, what date was the E0AE block put into production? This truck was built in November '79 if that makes any difference. Any chance I could bolt a 289 to my C4 transmission or would I be better off just finding a better 302 or modding this one a little?
Reply With Quote
  #10  
Old 11-29-2011, 10:12 PM
baddad457 baddad457 is offline
Post Fiend
 
Join Date: May 2003
Location: south louisiana
Posts: 6,547
baddad457 has a good reputation on FTE.baddad457 has a good reputation on FTE.baddad457 has a good reputation on FTE.
The E0AE block went into production in late 79. The casting numbers are located behind and below the starter. The casting numbers for the pre 1980's blocks are above the starter. Hopefully you'll have a D8VE block there instead of the 1980-up block. The D8VE castings are the same as the 289 blocks as far as weight goes, the bonus to look for is the D8VE-A3A casting, this one's got the 289 Hi-po/Mexican block main caps. The 3A suffix block will have the std main caps.
__________________
89 Ranger supercab-- 302-4bbl-- 4 speed 68 Mercury Monterey 390 4 bbl C-6 77 F100 400M C-6 67 Mustang fastback 427 2-4
Reply With Quote
  #11  
Old 11-29-2011, 10:44 PM
Conanski's Avatar
Conanski Conanski is offline
Post Fiend
 
Join Date: Jun 2006
Location: Ottawa, Ontario
Posts: 20,172
Conanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud of
With a completely stock truck motor the block is NOT a limiting factor in terms of HP potential no matter when it was produced. These motors need a cam and exhaust upgrade first and then likely a carb and intake if they're stock pieces. Those upgrades will generate 275-280hp at 5000rpm give or take but it will take better heads to get over the 300hp mark and it is possible to approach 400hp with the right cam, intake, head combo... on an all stock shortblock still... which is in no danger of scattering itself if you keep the rpms under about 6500. If you want more hp or rpm than that you have to start reinforcing the bottom end, but somewhere around the 450-500hp level the production blocks start to show their weaknesses so IMO $$ spend from this point on better be disposable because the block could split at any moment and destroy everything in and on it, and you're better off with an aftermarket 302 block or a 351.
__________________
Paul (Conan) O'Brien

1990 5.0HO AOD XLT X-Cab F150 3.55LS, 1994 3.0L 5-sp x-cab Ranger 3.45, 2004 3.0L 5-sp X-cab Ranger Edge 4.10, 2004 2.5L 5-spd Subaru Legacy
1996 Kawasaki ZX11D, 2004 Honda 599, 2008 Kawasaki KLR650
Reply With Quote
  #12  
Old 11-30-2011, 10:16 AM
Ranger80's Avatar
Ranger80 Ranger80 is online now
Senior User
 
Join Date: Nov 2011
Location: Owensboro, KY
Posts: 323
Ranger80 is starting off with a positive reputation.
beastlybertram bertramlee1995
Well considering it's in the '20s here today, I'm obviously not too thrilled to get out there and take my starter off. Does the starter cover up the numbers on the E0AE block? It feels like there are numbers stamped in the block above the starter, could this indicate that it's a D8VE block?
Reply With Quote
  #13  
Old 11-30-2011, 10:44 AM
HemiEater's Avatar
HemiEater HemiEater is offline
Postmaster
 
Join Date: Jun 2005
Posts: 2,656
HemiEater is starting off with a positive reputation.
Quote:
Originally Posted by Ranger80 View Post
Well considering it's in the '20s here today, I'm obviously not too thrilled to get out there and take my starter off. Does the starter cover up the numbers on the E0AE block? It feels like there are numbers stamped in the block above the starter, could this indicate that it's a D8VE block?
How much power you planning on making??
__________________
Whipple Survivor May 2008
Reply With Quote
  #14  
Old 11-30-2011, 10:55 AM
Ranger80's Avatar
Ranger80 Ranger80 is online now
Senior User
 
Join Date: Nov 2011
Location: Owensboro, KY
Posts: 323
Ranger80 is starting off with a positive reputation.
beastlybertram bertramlee1995
Quote:
Originally Posted by HemiEater View Post
How much power you planning on making??
Like I said, I'm not trying to build a street machine here. Fact is, it makes decent power the way it is now, I was just looking to bump it up just a little bit and get a little better top-end. Just enough so I can cruise down the highway with ease.
Reply With Quote
  #15  
Old 11-30-2011, 10:59 AM
HemiEater's Avatar
HemiEater HemiEater is offline
Postmaster
 
Join Date: Jun 2005
Posts: 2,656
HemiEater is starting off with a positive reputation.
Nothing wrong with an E0AE block I beat the snot out of one for years in my truck 234rwhp ...

Hate to see your worry about building what you have... it will be fine... get some headers and dual exhaust, upgrade your cam (plenty of guys here that know witch ones will work with your efi) and "I can't stress this enough" change your gears..

Good Luck
__________________
Whipple Survivor May 2008
Reply With Quote
Old 11-30-2011, 10:59 AM
Reply

Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)

Tags
1983, 200, 302, 89, bottom, bronco, built, early, end, escape, ford, inline, max, maximum, rpm, rpms

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 04:09 AM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup