Crate motor a dog - Off-Road Forums & Discussion Groups
GM Standard SFA Trucks & SUV's All discussion of full sized Solid Front Axle Trucks, SUV's to include Suburban

Reply
 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 12-24-2002, 12:50 PM
joeybcdt
Guest
 
Posts: n/a
Crate motor a dog

I bought an '83 Jimmy a few months ago. It origonally had a 305 but someone dropped in a GM Goodwrench 350 sometime in the past. The tranny is the 700R4. It's all stock.

What can I do to get some more power out of this thing? When I punch it it reminds me of an old Nissan 4 banger. There's just nothing there.

Joey
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 12-24-2002, 01:44 PM
 
Join Date: Oct 2001
Posts: 2,464
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Crate motor a dog

this might sound dumb but when my friend put a crate 355 inreplacement of a 305 the plugs reoringinally got were junk, we put in AC-Delco ones and it ran like a champ
Drey is offline  
post #3 of (permalink) Old 12-24-2002, 02:16 PM
Stroked72blazer
Guest
 
Posts: n/a
Re: Crate motor a dog

DO YOU KNOW WHAT CRATE MOTOR he put in it? If not try to get in touch with the owner or his mechanic to find out. The only other way is to look at the casting #'s on the block (behind the head on the drivers side. Then pull the valve cover off and get the 6 digit # for the head castings. This will tell you a little about the motor so you know what your starting with.
Sponsored Links
Advertisement
 
post #4 of (permalink) Old 12-24-2002, 03:50 PM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: Crate motor a dog

Is it a Goodwrench or a Target motor? I seem to remember the Target motors wiping out cams.
post #5 of (permalink) Old 12-24-2002, 04:00 PM
 
Join Date: Feb 2001
Posts: 578
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Crate motor a dog

Here is a long shot. Does it have a catalytic convertor on it? Sounds like it may be plugged.
derblank is offline  
post #6 of (permalink) Old 12-25-2002, 05:09 AM
joeybcdt
Guest
 
Posts: n/a
Re: Crate motor a dog

It says GM Goodwrench on the motor.
post #7 of (permalink) Old 12-25-2002, 08:21 AM
Way Outta Control
 
Join Date: Sep 1999
Location: usa
Posts: 10,815
Thanks: 0
Thanked 1 Time in 1 Post
 
Re: Crate motor a dog

Goodwrench motors are decent. Good for replacement applications
and good as a core for blueprinting.

It's not the motor itself, but what you've got on it - carb,
intake, exhaust, cam, ignition, etc. All those things work
in combination with each other. It's easy to get the wrong
combination.
And even if you have all the right things, how you've set
it up, cam timing, ignition timing, mixture, gearing etc.
makes a huge difference.

Maybe if we knew more about what it has, and the symptoms,
we could help. "Like a 4 banger" isn't enough.

RRich is offline  
post #8 of (permalink) Old 12-25-2002, 08:40 AM
joeybcdt
Guest
 
Posts: n/a
Re: Crate motor a dog

That may be a problem. I've only had the truck a few months.

The motor may be a year old or 10 years old. I just don't know. I don't have a clue how it was set up as far as cam, timing, ect. I do know it has a 4 bbl carb.

It runs really well. It just doesn't have any power when I punch the gas.

My origonal plan was to replace the stock exhaust with straight duals....then go from there. But no muffler shop around here would do it...so far...I'm still looking.

Joey
post #9 of (permalink) Old 12-25-2002, 10:07 AM
Way Outta Control
 
Join Date: Sep 1999
Location: usa
Posts: 10,815
Thanks: 0
Thanked 1 Time in 1 Post
 
Re: Crate motor a dog

For starters, how's compression?

What do you have timing set to - at initial?
At 1200 RPM?
At 1800 RPM?
At 3000 RPM?
What kind of ignition does it have?
Where's your vacuum advance source?
What carb?
Manifold - dual plane? Single plane? EGR?

Plugs - the correct ones the engine was designed around?
Or Micky Mouse plugs like platinums, krout, nip, yellow,
blue, red, splitfires, or any of the other gimmick plugs
designed to sell but not to run right?

What's the CO at idle, and 2500?

You could probably put another engine in and get exactly
the same results unless everything else is correct.

Straight exhaust may even have made it worse.
RRich is offline  
post #10 of (permalink) Old 12-25-2002, 07:38 PM
 
Join Date: Oct 2001
Posts: 2,464
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Crate motor a dog

i would go have the codes read, would be a easy way to figure it out if you ask me
Drey is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user 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:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 On
Pingbacks are On
Refbacks are On

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