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ricey
Phil Rice
Chessington Surrey
(14 posts)

Registered:
07/05/2017 02:19AM

Main British Car:
Mgb gt 1975 3.9 rover

Which cam 3.9 carb mgb
Posted by: ricey
Date: July 05, 2017 02:30AM

Hi I'm based in the U.K. and struggling to find anyone who's not a purist to ask advice !! We are currently starting to BGT V8 conversions both running 3.9 rover with 500cfm edekbrivk 1404 on performer manifolds with RV8 headers. Big question is which cam? At this stage I didn't want to machine the valve stems etc as wanted to get running and swap heads over to stage 1or 2 in the near future. Is there a cam you guys are running like piper 270 which will go straight in, OR should I machine valves to enable higher lift cam now, so that it is in ready for head upgrade?

I will start posting the fun over next few days and open up a build file

Thanks in advice

Phil


mgb260
Jim Nichols
Sequim,WA
(1751 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: Which cam 3.9 carb mgb
Posted by: mgb260
Date: July 05, 2017 04:05AM

I like the Crower 50232.


88v8
Ivor Duarte
Gloucestershire UK
(487 posts)

Registered:
02/11/2010 04:29AM

Main British Car:
TR6 74 2.5 injection six

Re: Which cam 3.9 carb mgb
Posted by: 88v8
Date: July 05, 2017 10:21AM

Hello and welcome.

Real Steel have their stump puller and other high-torque options
[www.realsteel.co.uk]

And Newman Cams who have a superb rep for their work, offer two Fast Road options
[www.newman-cams.com]

Buy matching lifters from the same source. Sorry if it's statin' the bleedin obvious, but one can't put just any lifters on just any cam, the hardenesses have to be a suitable combination.

Ivor


ricey
Phil Rice
Chessington Surrey
(14 posts)

Registered:
07/05/2017 02:19AM

Main British Car:
Mgb gt 1975 3.9 rover

Re: Which cam 3.9 carb mgb
Posted by: ricey
Date: July 05, 2017 11:44AM

Thanks for the info looking at the Crower that has a lift of .488, does this bolt straight in or to the heads need modification?
Ivor, are Newmans cams available in re UK and thanks for the tip re followers from same source!


mgb260
Jim Nichols
Sequim,WA
(1751 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: Which cam 3.9 carb mgb
Posted by: mgb260
Date: July 05, 2017 11:56AM

Phil, You cut the guides down for Viton seals. I used small block Chevy springs and larger valves in the 300 heads.


DiDueColpi
Fred Key
West coast - Canada
(1210 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
What if the Hokey Pokey really is what it's all about?

authors avatar
Re: Which cam 3.9 carb mgb
Posted by: DiDueColpi
Date: July 05, 2017 12:27PM

Give the cam suppliers a call Phil.
Be prepared with all the specs on your car, trans type, gear ratio's, tire size, compression ratio, head flow's, intended usage etc.
They can then supply a cam that is best suited for you.
You'll find that these guys are generally a wealth of knowledge and won't steer you wrong.

Cheers
Fred


MGBV8
Carl Floyd
Kingsport, TN
(3182 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
79 MGB, Buick 215

authors avatar
Re: Which cam 3.9 carb mgb
Posted by: MGBV8
Date: July 05, 2017 05:17PM

With the Crower 50232, you will have to change springs to prevent coil bind & likely take a bit off the top of the valve guides for the Buick 215 & Rover V8s.



ricey
Phil Rice
Chessington Surrey
(14 posts)

Registered:
07/05/2017 02:19AM

Main British Car:
Mgb gt 1975 3.9 rover

Re: Which cam 3.9 carb mgb
Posted by: ricey
Date: July 05, 2017 05:29PM

Thanks fir the input guys I'm going to ring a few tuners tomorrow and start a blog albeit might take a few months before car is running!


88v8
Ivor Duarte
Gloucestershire UK
(487 posts)

Registered:
02/11/2010 04:29AM

Main British Car:
TR6 74 2.5 injection six

Re: Which cam 3.9 carb mgb
Posted by: 88v8
Date: July 06, 2017 04:29AM

Ahh yes, I only gave you the pdfs, sorry.
Real Steel and Newman Cams are UK companies.

Address

[www.realsteel.co.uk]

[www.newman-cams.com]

Ivor


ricey
Phil Rice
Chessington Surrey
(14 posts)

Registered:
07/05/2017 02:19AM

Main British Car:
Mgb gt 1975 3.9 rover

Re: Which cam 3.9 carb mgb
Posted by: ricey
Date: July 06, 2017 10:00AM

Having had a chat with Ray at V8 Developments who was v helpful, I'm going to go fir the easier option of his MC1 cam as I won't have to machine anything at this stage or pocket the pistons. Once up and running I'll look for a set of heads from him to complement the cam. I'd love to go higher lift but funds prohibit this at the mo. I'll come back with some dynobfigs soon


ricey
Phil Rice
Chessington Surrey
(14 posts)

Registered:
07/05/2017 02:19AM

Main British Car:
Mgb gt 1975 3.9 rover

Re: Which cam 3.9 carb mgb
Posted by: ricey
Date: July 06, 2017 10:02AM

Thanks again guys


mstemp
Mike Stemp
Calgary, Canada
(176 posts)

Registered:
11/25/2009 07:18AM

Main British Car:
1980 MGB Rover 4.6L

Re: Which cam 3.9 carb mgb
Posted by: mstemp
Date: July 06, 2017 10:07AM

Crower 50232 is a nice cam and works well with the 14CUX FI on my 4.6L just fine. But idle is not that smooth if you run it closed loop on the FI. Needs about an AFR of 13 or so, otherwise the lumpiness shows up well. Rover gauge and a chip burner solves this easily though. Or just run the Map 2 in the ECU by changing the resistor. If carb, no issues. Did have to cut valve spring pockets etc though.



Edited 1 time(s). Last edit at 07/06/2017 02:27PM by mstemp.


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