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roverman
Art Gertz
Winchester, CA.
(2973 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

RV8 with Sidedraft Webbers ?
Posted by: roverman
Date: January 24, 2019 06:28PM

DCO's available in 48, 50 and 55mm, all same price. My Mickey Thompson/Indy manifold is 50 mm at port inlet ? Race only ! Street DCOE's are 45mm, and much less $'s. Anybody versed with these carbs ? Thanks, art.


Bland
Tim Bland
Oregon
(20 posts)

Registered:
01/22/2017 11:15PM

Main British Car:
1980 Triumph TR8 Rover 3.5

authors avatar
Re: RV8 with Sidedraft Webbers ?
Posted by: Bland
Date: January 24, 2019 09:36PM

Art,

I have worked with sidedraft webers on Cosworth and Toyota Atlantic motors. Are you asking if 45's will work? What is the engine displacement and is this for your GT1 drag car?

Have you spoken with Pierce Manifolds?


4.6 MGB V8
Matt T
New York
(30 posts)

Registered:
12/07/2007 04:13PM

Main British Car:


Re: RV8 with Sidedraft Webbers ?
Posted by: 4.6 MGB V8
Date: January 26, 2019 12:14AM

A fellow named Costello was way back in the beginning 😆. Mounted on a rear facing manifold to clear the bonnet. I think he used 45ís but Iíve been looking for one of the larger DCOís for a while with no luck. There are also the dual and quad manifolds you are probably familiar with.
D84A9895-6840-4472-8B62-CA29E548AAB7.jpeg
BED00145-4711-4E59-A1EC-AAD035743953.jpeg
559D22F4-4C08-4FF3-BA20-9D2FC218B235.jpeg



Edited 1 time(s). Last edit at 01/26/2019 12:19AM by 4.6 MGB V8.


roverman
Art Gertz
Winchester, CA.
(2973 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: RV8 with Sidedraft Webbers ?
Posted by: roverman
Date: January 29, 2019 04:04PM

The MT. DCO(E), manifold is I.R., so 4 carbs. I suspect that (4) 45 DCOE's will get the flow/hp. I need,(400-500). ? Why spend $700 more,( DCO'S), if not needed ? I suspect Pierce my not welcome another competing manifold ? art.


roverman
Art Gertz
Winchester, CA.
(2973 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: RV8 with Sidedraft Webbers ?
Posted by: roverman
Date: January 29, 2019 04:43PM

Tim, Displacement to be 4L," IF" I can get crank down to 2.8" stroke. Otherwise 4.2-4.5L ?


roverman
Art Gertz
Winchester, CA.
(2973 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: RV8 with Sidedraft Webbers ?
Posted by: roverman
Date: February 06, 2019 04:21PM

Since I want to use E85 and Webbers won't like, I have Hilborn Inj. Likely I'll increase butterflies to 2".


tr8todd
Todd Kishbach

(350 posts)

Registered:
12/04/2009 07:42AM

Main British Car:


Re: RV8 with Sidedraft Webbers ?
Posted by: tr8todd
Date: February 06, 2019 05:25PM

Iíve seen a couple of stroker engines with Weberís and then 4 barrel harcourt open plenum manifolds. Dyno results were just about interchangeable. Iíve also seen well tuned 4 barrels replaced by 4 barrel looking fuel injection systems. Peak horsepower remained the same, but just about everywhere under the curve was 10 to 15 ft pounds better with the fi. Unless you are going for the cool factor, just install a Fitech or similar system and be done with it. My 4.6 powered coupe is getting the 400 hp capable fitech on an edelbrock. Should make for a nice 250 plus hp driver and thatís more than I can make on the SCCA ITS race car by about 75 hp. On a British race car, itís more about reliability and repeatability than it is about peak hp.



roverman
Art Gertz
Winchester, CA.
(2973 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: RV8 with Sidedraft Webbers ?
Posted by: roverman
Date: February 06, 2019 07:17PM

Todd, well taken-but, MT "Indy" is way cool. All 8 runners are 8.0" long on short side. Should boost mid-range torque. Cross ram means no hood bulge/etc.(nasty sleeper). True, tuned length, IDF's can get there, but above std. hood height. I would like peak power at 8k + rpm. Ported TA's , E85 and high effective comp ratio, I'm aiming for 400+ hp. Obviously induction go back to Huffaker 4 bbl and gas, for SCCA.
zoom-zoom, art.


tr8todd
Todd Kishbach

(350 posts)

Registered:
12/04/2009 07:42AM

Main British Car:


Re: RV8 with Sidedraft Webbers ?
Posted by: tr8todd
Date: February 07, 2019 08:32AM

Yep, really cool, expensive, time consuming to tune, etc. Untiil the car is actually out there turning laps, its all just bench racing anyway. We can talk what ifs all night long, or you can slap a 4 barrel on it and get out there. Worry about the finer details after you spend a bunch of money on tires and entrance fees. Are after market heads even allowed? I doubt it, unless some of the vintage racing series look the other way. What good is a race car if it isn't racing? I got two of them just collecting dust and taking up valuable garage space.


roverman
Art Gertz
Winchester, CA.
(2973 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: RV8 with Sidedraft Webbers ?
Posted by: roverman
Date: February 07, 2019 11:07AM

Todd, Ow ! Agonizing reappraisals..... A: limited term straight line racing, 1/8-1 mile events. Hilborn on road course, not-so-good. B: Until I'm really ready for vintage road race events, Huff will showcase/ prove worthiness of products I am manufacturing. C: such as bell housings, auto trans, 8 port cross ram intake, and roller cams. Old school Hilborn, for straight line work, pretty easy to tune.
zoom zoom, maybe happen, art


Bland
Tim Bland
Oregon
(20 posts)

Registered:
01/22/2017 11:15PM

Main British Car:
1980 Triumph TR8 Rover 3.5

authors avatar
Re: RV8 with Sidedraft Webbers ?
Posted by: Bland
Date: February 07, 2019 02:45PM

ART,

Sent you a PM regarding the cross ram intake.


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