Engine and Transmission Tech

tips, technology, tools and techniques related to vehicle driveline components

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roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

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

Re: Besides Merlin head flow...
Posted by: roverman
Date: October 28, 2010 11:54AM

Unless there's a wizzing contest for Roverites, with $'s to burn, why buy ? I'm thinking those on the V8 Buick sign-up list for TA heads, might be having second thoughts. "Rick Crawford" ported iron 350sbb. heads are reported to flow 266/199 cfm with 1.92/155 valves. 280 cfm has been "alluded" to. The iron 300/340 has "terrible" #'s stock. Some day, that "Rally Guy" might tell us what his ported 340's flow. This spells of just one more Rover, "could have been's". like the cost prohibitive Wildcat heads, TA's seem to be a slightly improved version with a deal breaker price. Meanwhile, I'll just "make-do" with a replacement head designed for street use. "Steel" never ported these, because of this. roverman.


DiDueColpi
Fred Key
West coast - Canada
(1365 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
I really thought that I'd be an action figure by now!

authors avatar
Re: Besides Merlin head flow...
Posted by: DiDueColpi
Date: October 28, 2010 01:24PM

Hey Art,

I haven't been contacted by anyone after being told that "I'll just have to wait".
So from my perspective my money is better spent elsewhere.
The excitement has passed and maybe someday I'll use those heads on something.
But for now I'll just swallow the dissapointment and use something else.
It would be nice to see those heads run on an engine, it just won't be mine.

Cheers
Fred


roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

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

Re: Besides Merlin head flow...
Posted by: roverman
Date: October 28, 2010 02:05PM

Fred, if you want excitement, finish your "Rotus 32V" ! U-no, 300 CFM.? Where's the pic's ? Where's the cams ? Send me some spec's and I'll get them "bid". Cheers, roverman.
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DiDueColpi
Fred Key
West coast - Canada
(1365 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
I really thought that I'd be an action figure by now!

authors avatar
Re: Besides Merlin head flow...
Posted by: DiDueColpi
Date: October 28, 2010 03:05PM

Art,
The Lo-ver is a long term project.
I've been at it off and on for several years now.
I will finish it at some point but won't even look at it again until winter.
When the time comes I'll just machine some blanks and have Geoff grind them.
Before that the crank needs to be nailed down. I do have that 4cyl crank in the works still, but this is a spare time project for him as well. So it happens when it happens.
As far as pic's go, the only one I've ever sent is the one in my bio of the lovely Lynne's Rangey and my TGB. I had to get my daughter to do that for me because I don't know how. Someday I will learn but it's pretty low on the list.
Cheers
Fred


roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

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

Re: Besides Merlin head flow...
Posted by: roverman
Date: October 28, 2010 04:17PM

Fred, As I understand it, if you make cams, you use Rover crank. Use 4 cylinder crank, you use 907 cams ? Good Luck,roverman.


DiDueColpi
Fred Key
West coast - Canada
(1365 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
I really thought that I'd be an action figure by now!

authors avatar
Re: Besides Merlin head flow...
Posted by: DiDueColpi
Date: October 28, 2010 04:37PM

Kinda sort of Art, My cams rotate backwards but the lotus cams don't look asymmetric so I might get away with it on the custom crank.
Will need to measure the cams some day to see. Hopefully if I retime everthing, line up the cosmos and rub Budda's belly it will all work.
Cheers
Fred


roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

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

Re: Besides Merlin head flow.../64' 300" head ?
Posted by: roverman
Date: October 30, 2010 01:58PM

On the surface, the 300" Buick head may appear to be a best value, for those who must have aluminum. Example,pair of D&D prepped heads are for sale, in this forum. Indeed the ported 300 tends to max flow around 196-200 cfm. at .550" lift. I contend there is more to a head than just flow, such as strength/# of bolts per bore/wall thickness/valve train support,chamber size and burn rate, and of course, value. It's good to know, as our aging fleet of Rover and sbb shortblocks, march into the future, there are currently (3) different manufacturers of after market heads. Hopefully, there will be genuine market competition, to aid our quest. Cheers, roverman.



hoffbug
Tony Hoffer
Minnesota
(323 posts)

Registered:
10/15/2007 05:25PM

Main British Car:
Olds 215 EFI

Re: Besides Merlin head flow...
Posted by: hoffbug
Date: November 08, 2010 04:12AM

I wonder what those heads would flow into a 3.75" tube about 3.5" long?
I bet it isnt 200 CFM..
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