|
|
|
|
09-17-2007, 06:44 PM
|
#1 |
|
Junior Member
Join Date: Dec 2004
Location: Detroit
Posts: 53
Likes: 0
Liked 0 Times in 0 Posts
|
1969 351W 290 hp. stock ?
I am considering running this combo in a fox body Mustang IHRA GT Stock. Has anybody run this combo? Who can build a 4300 Autolite carb.? I noticed in Superstock the rating is lowered to 260 hp. but stock is at 290. I just do not want to invest in something with no future. Thanks, Louis Jeffery
|
|
|
|
09-17-2007, 07:42 PM
|
#2 |
|
VIP Member
Join Date: Dec 2006
Location: West Virginia
Posts: 1,366
Likes: 6
Liked 70 Times in 29 Posts
|
Re: 1969 351W 290 hp. stock ?
Who builds the carb for Jeff Lee from AZ that runs the SS/H AMX? I believe that is the same carb.
I think you could get the stock HP lowered as well after you start running it. I can't recall anyone who runs that right now. I think it would run pretty well. Louis, I have an original intake for that motor if you need one. Does anyone know the CFM Of the autolite carbs?
__________________
Chris Bowman The Mountain State Mustang 1984 Mustang GT350 |
|
|
|
|
09-18-2007, 10:30 AM
|
#3 |
|
VIP Member
Join Date: Dec 2001
Location: Arkansas - In the middle of everything.
Posts: 2,001
Likes: 64
Liked 780 Times in 194 Posts
|
Re: 1969 351W 290 hp. stock ?
That you are considering racing IHRA, I would petition for some hp reduction before investing time and money. Here's MHO:
The heads/intake system will flow only about 86% of comparable 350/295 & 300 Chevrolet also rated at 290. The blueprinted compression ratio will be in the 10.5 to 1 range, the Chev 350/300 is the 11.5 to 1 range. The carb is a small Motorcraft 4300 with 1.437" primaries and 1.563" secondaries. In comparison, Jeff Lee's carb has 1.563" primaries and 1.686" secondaries and flows less than 700 cfm. The Chev 350/300 has a Qjet at 750 cfm. The 351 does have more valve lift than the Chev, but also bigger main bearings (3.000") and a heavier crank and rods than the 350 Chev. I know that just the "numbers" don't make it or break it in every case, but there is enough significant indication in these compared numbers to tell you that you will not likely be able to match the performance of a 350/300 Chev which is a common competitive combination. I am using the Chev engine only as a comparison; there are other combinations that are in the same power rating range that could be used to show that the 351 290hp '69 Windsor would probably not be very competitive at that power rating, if that is your primary consideration. |
|
|
|
|
09-18-2007, 11:05 AM
|
#4 |
|
Guest
Posts: n/a
|
Re: 1969 351W 290 hp. stock ?
You would be better off running a 71 or 72 Cleveland combo, you get a high flowing head that will afford you to run a whole lot better carb than that Autolite. Just my opinion, if you would like some more info on a Windsor combo shoot me a IM and I might be able to put you in contact with someone.
Smitty |
|
|
|
09-18-2007, 12:47 PM
|
#5 |
|
VIP Member
Join Date: Dec 2006
Location: West Virginia
Posts: 1,366
Likes: 6
Liked 70 Times in 29 Posts
|
Re: 1969 351W 290 hp. stock ?
what carbs came on the 71 or 72 clevelands though?
__________________
Chris Bowman The Mountain State Mustang 1984 Mustang GT350 |
|
|
|
|
09-18-2007, 02:18 PM
|
#6 |
|
Member
Join Date: Jan 2002
Location: canada
Posts: 113
Likes: 5
Liked 19 Times in 10 Posts
|
Re: 1969 351W 290 hp. stock ?
71-72 Clevelands can use a 780 Holley as a replacement carb
__________________
Kevin Love 5666 STK/SS |
|
|
|
 |
| Thread Tools | |
| Display Modes | |
|
|
Hybrid Mode
