logo
12 Port News - Features
12 Port History
Casting Numbers
Online Store
Tech Tips
Become a Member
Previous Thread
Next Thread
Print Thread
Rate Thread
Joined: Sep 2008
Posts: 46
H
Active BB Member
OP Offline
Active BB Member
H
Joined: Sep 2008
Posts: 46
It's no joke that parts are hard as hell to find for a chevy 250 when it comes to performance. Anyways can anyone ease the pain of my searching and point me towards any sites that sell fuel injection kits for a chevy 250. I know Clifford used to sell one but they seem to have removed it from their web site. I'm lookin to do a full rebuild on my six that's in my 71 nova but am looking to get a LOT more out of it then what it's putting out. The only non stock pieces right now are clifford intake and headers with a holley 390 carb but i would prefer injection over carb.
Thanks

Joined: Apr 2004
Posts: 3,556
Likes: 35
1000 Post Club
****
Offline
1000 Post Club
****
Joined: Apr 2004
Posts: 3,556
Likes: 35
I would recomend a Holley TBI system.
Here is one at Summit.
http://www.summitracing.com/parts/HLY-700-21/

It is a 670 CFM 2 bbl and programmable. It will be a little large but should still work good.


Inliner Member 1716
65 Chevelle Wagon and 41 Hudson Pickup
Information and parts www.12bolt.com

Joined: Aug 2006
Posts: 232
W
Contributor
*****
Offline
Contributor
*****
W
Joined: Aug 2006
Posts: 232
Any problems with using one of the Holley TBI systems that is specified for a V8 on an L6 engine?

Joined: Apr 2004
Posts: 3,556
Likes: 35
1000 Post Club
****
Offline
1000 Post Club
****
Joined: Apr 2004
Posts: 3,556
Likes: 35
Not really, other than it will be on the large side. I think the injectors are rated to 300 hp.

It would be nice if they made a 350-400 CFM unit.


Inliner Member 1716
65 Chevelle Wagon and 41 Hudson Pickup
Information and parts www.12bolt.com

Joined: Apr 2006
Posts: 831
Major Contributor
*****
Offline
Major Contributor
*****
Joined: Apr 2006
Posts: 831
Ton can you post a picture of your Clifford intake with the injector bungs?, that with a TPI throttle body would allow easier and more precise tuning..


'45 Ford PU
66 Valiant wagon, leaning tower of power.
79 Chevy C10 w/250
02 PT Cruiser Convertable
Joined: Apr 2004
Posts: 3,556
Likes: 35
1000 Post Club
****
Offline
1000 Post Club
****
Joined: Apr 2004
Posts: 3,556
Likes: 35
Here are the 2 different ones I have. One made by me the other a newer intake that came with enough material to machine as is and no heating provisions.




Inliner Member 1716
65 Chevelle Wagon and 41 Hudson Pickup
Information and parts www.12bolt.com

Joined: Nov 2004
Posts: 1,805
Likes: 1
E
1000 Post Club
*****
Offline
1000 Post Club
*****
E
Joined: Nov 2004
Posts: 1,805
Likes: 1
Other than the actual injector connectors there is no reason why you cannot use a GM TBI with the holley box. $30 at the local wreckers will yield a GM TBI unit. Sell the big holley one and get some $$ back.


51 GMC 4.2 turbo
Can't solved today's problems using the same technology/thinking that created them
Joined: Apr 2006
Posts: 831
Major Contributor
*****
Offline
Major Contributor
*****
Joined: Apr 2006
Posts: 831
I'm planning on using one of these elbow adaptors slong witha Clifford intake ( http://www.summitracing.com/parts/EDL-3848/) that will allow the use of a GM TPI or Ford throttle body, Edelbrock also makes one in a low profile.


'45 Ford PU
66 Valiant wagon, leaning tower of power.
79 Chevy C10 w/250
02 PT Cruiser Convertable
Joined: Aug 2006
Posts: 232
W
Contributor
*****
Offline
Contributor
*****
W
Joined: Aug 2006
Posts: 232
 Originally Posted By: tlowe #1716
Not really, other than it will be on the large side. I think the injectors are rated to 300 hp.

It would be nice if they made a 350-400 CFM unit.


Holley offers the following Throttle Body Fuel Injection Systems:

Commander 950-19S....400 CFM....225 HP
Commander 950-20S....670 CFM....275 HP (Recommended for engines over 200 hp)

Joined: Sep 2008
Posts: 46
H
Active BB Member
OP Offline
Active BB Member
H
Joined: Sep 2008
Posts: 46
how much do you need to put in to a 250 to get around 300-325 hp out of it? what all would it take if i decided to stick with a carb and put more into the rebuild?

Joined: Sep 2004
Posts: 5,839
Likes: 1
M
1000 Post Club
***
Offline
1000 Post Club
***
M
Joined: Sep 2004
Posts: 5,839
Likes: 1
A small turbo set-up will do just fine.

MBHD


12 port SDS EFI
Joined: Sep 2008
Posts: 46
H
Active BB Member
OP Offline
Active BB Member
H
Joined: Sep 2008
Posts: 46
ok any rebuild kits and cams you would recomend? It's also still the origional engine so it's due for a rebuild where is the best place to get get the parts i need sorry, i would look back more but i'm in language school at work from 5-6 everyday then have lots of homework hate arabic, i am sure i could find this but feeling lazy thanks for putting up with it.

Are the classifieds not working for anyone?
I love that clifford manifold set up for EFI what would that thing run to get my hands on \:\)


Moderated by  stock49, Twisted6, will6er 

Link Copied to Clipboard
Who's Online Now
0 members (), 364 guests, and 17 robots.
Key: Admin, Global Mod, Mod
Newest Members
trustedmedications20, Jsmay101, Paul Mahony, KeithB, Steve83
6,783 Registered Users
Sponsored Advertisement
Sponsored Advertisement
This Space is Available
Powered by UBB.threads™ PHP Forum Software 7.7.5