Webers for 427 WINDSOR
I'm posting for a friend. He's built a 427 with solid roller cam in the mid .600 range, 108 LSA, with heads flowing 315/210.
Can anyone supply a baseline tune for 48 IDA's, including choke size? The car is an early Mustang of about 3000 pounds. Thanks, |
Wow, that's a lopey cam (108 LSA) for Webers. I'm going to watch this thread close and see what the experts recommend. I want to learn more about these carbs (even though I can't afford them at the moment).
-Dean |
Quote:
Well if I get mad at mine again you can find them at the bottom of my driveway with a FREE sign.. :LOL: |
OFM, your set-up looks great. First dibs when you decide to go back to a 4bbl. :D
-Dean |
Should I conclude that there are no 427 Windsor Weber guys-only 302 and 331 guys??
Any general Weber knowledge for a similar situation would be appreciated here... |
I have a 395 engine running webers. I am thinking about rebuilding it to a 427. If I was you I would hit up steve at Top end performance or the guys at Pierce manifolds. they both seem quite knowledgable and could help.
|
Quote:
|
My cam card is in my gallery.. It is a roller cam from Keith Craft. I will send my jet sizes as soon as I can find my notebook in that messy garage of mine.
|
Thanks OFM.
The cam seems very Weber-friendly. Mild duration and lift and a good amount of separation. Does it run cleanly? Appreciate your sharing. |
Chas,
is this a 427W motor? What are the cam specs (advertised duration) with opening and closing degrees? Have the webers been modified with a third transfer port? |
Wayne,
Yes it's a 427. I only know what I posted in #1. The Webers have not arrived yet but I think they will be in a generic state of tune. I doubt they have a transfer port mod out of box but if you can elaborate on what that accomplishes it would be helpful. Really hoping for the experiences of a guy (like OFM) with a near 427 as displacement probably makes a notable difference. |
Where did you get the webers? The IDA's come with 2 transfer ports to transition from the idle circuit to the mains. Redline drills a third hole to supply just a bit more fuel to help them run smoother. I really need the cam specs to tell you if it will work with the Webers. It will run very well above 3000 rpm but around town manners could be poor or worse.
|
Wayne,
I won't have the exact cam specs until tomorrow. Will post when I do. |
There is a huge dependency on the Camshaft for webbers to work right.
If the cam was not ground by someone who was specifically considering vacuum requirements of webbers in its design, then the carbs will not work to their potential. I would contact COMP cams and ask to speak to a specialist and have port data , combustion chamber data and compression data available. When ford ran these at Lemans , they had teams of people working on them for months, and they never had to sit at idle in the drive through window at In-N-Out burger. --so if it takes a bit of work and possibly some revisions once installed, consider your self lucky. Steve |
Just got some specs and find my original info was mistaken.
The cam is a solid roller, 578" x .596", 255 x 260 @ .050" and 114 LSA. The head data is correct plus 2.08" x 1.60" valves. The car is a little lighter at 2800. |
That should be a Good High Vacuum CAM. -= should work well.
|
Thanks for the feedback Steve.
|
Quote:
Quote:
Quote:
1. So even with a 255 and 260 int/exh duration, the 114 LSA vacuum signal is enough to offset that and promote a smoother idle/transition? 2. How much does the Redline "band-aid" of adding a third hole offset the negative effects of, say, using a 110 LSA cam? 3. Curious as to how many guys end up installing a vacuum pump to feed their power brakes? Thanks!...Great thread BTW. -Dean |
Quote:
These are great questions. At least now I have a clue about the '3rd hole' mystery. Apparently, there are not many (or any) stroker Windsor, Weber- users out there, or 427 sized FE Webers in use that can shed light on this. 600+views, very few replies. |
Hello All,
These are the specs for my Dart Aluminum 427 with webers installed in the SPF GT 40. Block: Dart Aluminum 351 Crankshaft: Eagle Number 595FA Design Description Forged/Nitrided Finished Bore 4.1245" Stroke 4.000 Deck Height 9.5" Main Journal 2.7445" Oil Restrictors/size Restrict Lifter bore 2- .125" Rod Journal 2.985" Rod Clearance 0.003" Pistons: JE SRP Main Clearance 0.0025" Mfg. Part # 231596 Rod Side Clearance 0.018" Description Forged Axial Thrust 0.006" Dome Volume 19cc (Dish) Balance Internal Skirt Dimension 4.120" Skirt/Cylinder Clearance .005" Cylinder Heads: Edlebrock Pin Diameter/Length .927/2.750" Design Description Victor Jr. Piston/pin Weight 435.5/447gr Final Chamber Volume 62.5cc Runner Volume 210 Piston Rings: SpeedPro PlasmaMoly Intake Valves 2.050 Top Land gap/backspace .001"/.010" Exhaust Valves 1.600 2nd Land gap/backspace .001"/.010" Valve Seats Stellite Top Ring Gap .018" Valve Spring Make Edlebrock stock Bottom Ring Gap .022" Valve Spring Dia. 1.450" Installed Height 1.900" Connecting Rods: Scat Pressure @ Seat 135 Design/Type Forged "H" beam Pressure @ Full Lift* 360 Length 6.250" Compression Ratio: 10.8:1 Wt. Top/Bottom/Total 192/447/639 Camshaft: Engle Valvetrain: T&D Type Hydraulic Roller Rockers/Ratio 1.6:1 Pedestal Mount Exhaust Lift*/Duration .549"/291 Lifters Crane Hyd. Roller 36532 Intake Lift*/Duration 563"/281 Pushrod length 6.200" Lobe sep. angle 112 Timing as installed @ 0.050" 10/47/58/8 Induction: Naturally aspirated Manifold Weber Blower N/A Fuel System Weber 48 IDA Flywheel: McLeod 463100 steel Ignition: MSD Harmonic Balancer: Professional Products SFI Ignition Controls MSD Billet Clutch Centerforce - DF920830 Firing Order 13726548 Tony R. |
All times are GMT -7. The time now is 06:09 AM. |
Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: