WANTED Edelbroch F4B inlet manifold

Ash · Post by **Ash** » Sun Apr 17, 2011 11:11 am

Please PM me if you have one to sell.

Cheers
Ash

garyv8tiger · Post by **garyv8tiger** » Sun Apr 17, 2011 6:39 pm

how much have you got.and why do you want an f4b

gtsmrt · Post by **gtsmrt** » Sun Apr 17, 2011 11:11 pm

Hi Ash,

You do see these on Ebay regularly, but they are quite expensive (brand new prices for second hand items). If it is originality then the F4B is probably the one, but if you just want performance, there are better options available like the Edelbrock RPM manifolds.

Good luck, Robin.

Ash · Post by **Ash** » Mon Apr 18, 2011 7:51 pm

Hi Robin

Thanks for the advice. Yes originality is the main reason. I had one on my last tiger and would like to get one for my current project. I am sure something will turn up at some point

garyv8tiger · Post by **garyv8tiger** » Mon Apr 18, 2011 9:55 pm

i have one but i need it ,i know where there is another ,

michael-king · Post by **michael-king** » Mon Apr 18, 2011 11:53 pm

There are several types of F4B, some have mounting holes that work well for the tiger, some have ones that dont work as well.

There is also the variation in the inlets in the manifold, the original LAT ones had the 4 seperate holes on the manifold inlet plane, the later ones have the 2 slots. The later ones flow better and if you notch them slightly between the 2 inlets it balances them and apparently helps with torque.. this is what was then stock on later edelbrock manifolds.

Ash · Post by **Ash** » Wed Apr 20, 2011 7:11 am

OK thanks for that Michael.

Why is nothing ever straight forward??

gtsmrt · Post by **gtsmrt** » Wed Apr 20, 2011 2:09 pm

michael-king wrote:There are several types of F4B, some have mounting holes that work well for the tiger, some have ones that dont work as well.

Do you know why there is a difference? Were there slightly different heads or something, somewhere along the way?

martin172 · Post by **martin172** » Wed Apr 20, 2011 2:20 pm

There seems to be loads on US E-bay but as I don't know what I'm looking at they could be anything.

gtsmrt · Post by **gtsmrt** » Wed Apr 20, 2011 10:31 pm

Hi Martin,

At any one time there would normally be at least two up for sale at any one time. Being made for the windsor motor they should be ok, but as pointed out there are some variations.

Regards, Robin.

michael-king · Post by **michael-king** » Wed Apr 20, 2011 11:51 pm

gtsmrt wrote:
michael-king wrote:There are several types of F4B, some have mounting holes that work well for the tiger, some have ones that dont work as well.
Do you know why there is a difference? Were there slightly different heads or something, somewhere along the way?

The difference is development and refinement, as with most things they evolve over time (pitty all things dont), better ideas on flow trying different theorys. It has nothing to do with changes in heads as they were fitted to various spec windsor motors.

michael-king · Post by **michael-king** » Thu Apr 21, 2011 12:02 am

OK.. things not to believe on ebay:

This is listed as a LAT tiger manifold, but strictly speaking, its not, as it has the to slot intake design:
http://cgi.ebay.com/ebaymotors/Edelbroc ... 2eb4b26fc3

This once installed would be virtualy identical to the LAT one, and should perform a little better.

The absolute correct one:

V8 burble · Post by **V8 burble** » Thu Apr 21, 2011 11:02 pm

I agree with the other responses above.
A used Edelbrock F4B manifold is much sought after and will fetch around $300 to $350 in the States. The true, 4 hole, LAT 1 version is much rarer and will probably cost a lot more. If you simply must have an F4B, then that is the route you will have to take.
Alternatively, why not ask garyv8tiger about the one he knows about?

http://cgi.ebay.com/ebaymotors/Edelbroc ... ccessories

A cheaper alternative like the Edelbrock Performer #2121 will cost about £200 new in the UK:
http://cgi.ebay.co.uk/Edelbrock-2121-Pe ... 19b7be7be8

In addition you also need to consider bonnet clearance and engine rev band.

A is centre front vertical height.
B is centre rear vertical height.
The critical carb pad height CH is (A + B) divided by 2.

Anything above about 5.0 inches will not fit under a standard Tiger bonnet with stock air cleaner. There are so many variations with different fittings, spacers etc but these figures should give you some idea of what to expect when trying to close an unmodified bonnet.

Edelbrock F4B (2500-7000 rpm)
A = 4.56 inches
B = 5.31 inches
CH = 4.94 inches

Edelbrock Performer #2121 (idle-5500 rpm)
A = 3.50 inches
B = 4.75 inches
CH = 4.13 inches

Edelbrock Performer RPM (1500-6500 rpm)
A = 4.30 inches
B = 5.50 inches
CH = 4.90 inches

Weiand #8124 (idle to 5500 rpm)
A= 3.82 inches
B = 4.75 inches
CH = 4.29 inches
http://www.holley.com/8124.asp

BlackDog · Post by **BlackDog** » Tue Apr 26, 2011 1:47 am

That's a very good chart which I believe is also on the Tigers United site.

I'm running an Edelbrock RPM 'Air Gap' that as far as I know is the same dimension as the RPM . I have only a gasket between it and the 650 DP and run the stock air cleaner housing with a K&N standard Tiger height filter. I checked the clearance on the front corners ( even though they are round...

) and I had about 3/8" to spare ( stock hood ). I'd like to be running the taller K&N filter ( can't remember the # ) that fits the stock housing but I'm sure it would be too tall. I wonder about the breathing as there is an imprint of the choke blade on the underside of the air cleaner top

... I will probably be changing the carb to a 600 DP ( for slightly more throttle response ) soon and may try it with the air horn milled off as I don't at present use the manual choke anyway...

I have an spare F4B as I just thought at the time that EVERY Tiger owner should... but now I'm quite sure I'll never use it. It's of the later design and could be had for a reasonable sum... shipping would unfortunately be from Canada tho' ...

Jim
B382000446

Tomaselli · Post by **Tomaselli** » Tue Apr 26, 2011 11:40 am

BlackDog wrote:I'd like to be running the taller K&N filter ( can't remember the # ) that fits the stock housing

I did some work on various thickness of the K&N Filter that will fit the "factory" air filter housing; the first I have listed below (1.5in depth) is equivalent to the standard setup. The others are available from a UK Tiger parts specialist who is a recognised agent. Clearly, clearance issues will be a consideration depending on what carb/inlet manifold you are running.

Fron K&N technical desk, I also got the CFM flow ratings and have listed these also, as it will be a consideration for some of the "big carb" brigade

E-2859: approx. (1.5in), 381CFM @ 1.5” of water

E-3710: approx. (2.0in), 508CFM @ 1.5” of water

E-3717: approx. (2.5in), 638CFM @ 1.5” of water

E-3720: approx. (2.75in),699CFM @ 1.5” of water

E-3723: approx. (3in), 763CFM @ 1.5” of water