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Posted: Thu Aug 14, 2014 9:27 pm
by mgbloke
Mike,
thanks that's very interesting. My concerns followed a chat with a well known engine builder who dislikes merlin and Ta heads. he said I was wasting my time if I used the 45 bodies.
Cheers
mark
Posted: Fri Aug 15, 2014 10:26 am
by Darkspeed
I would not discount the experience and advice of a knowledgeable Rover tuner as the Rover head (The TA is not so far different) - is a peculiar beast and I would accept such sage advice if freely given.
From what I understand about your engine and your proposed use the simple weber spreadsheets I have say that a 48 is the minimum for a carb (42mm choke) which relates to a 45 TB being minimum. @ 6000 RPM
Weber @ 7000 RPM needs a 47mm choke 55mm Carb - 48mm TB getting tight.
What Max power RPM are you aiming for and how long is the distance from the valve to the butterfly.
Posted: Fri Aug 15, 2014 4:44 pm
by kokkolanpoika
Posted: Wed Aug 20, 2014 7:37 am
by mgbloke
Wow
That looks like a lot of work!!!!
What size valves?
Posted: Wed Aug 20, 2014 6:04 pm
by kokkolanpoika
Also another head has been welded..
Only problem is JIG (20mm steel plate)attachment bolt is very tight in head.. Need slightly heat and hammering to get it out.. Without heating it wont come out.. All other 9 headbolts hole is ok. This is slightly tight after welding.. Need to clean hole for drill.
I spend approx 2 hours for porting to get slightly bigger ports to get TIG inside the track.. And it took approx 6-7 hours for welding etc..
We measure head straightness and we have to machine approx 0.04mm to get head back to straight.. So ok to use without milling. But for better sealing we have to machine it
Also i have to make pressure test before any machining..
Any more thoughts?
Posted: Wed Aug 20, 2014 6:42 pm
by kokkolanpoika
Valves will be 44/37 or 44/38? No reason to go for bigger.. Also thinking +2mm offset dowels..
Posted: Wed Aug 20, 2014 7:47 pm
by Eliot
I'm pretty impressed you managed to get a tig gun down those ports.
Posted: Thu Aug 21, 2014 9:30 am
by topcatcustom
That is an impressive amount of effort, look forward to seeing the finished item (you will hate you have 2 to do!!)
Posted: Tue Aug 26, 2014 11:50 am
by Blown v8
These turned up from South Australia this morning
Posted: Tue Aug 26, 2014 4:32 pm
by mgbloke
Woooo Hooooo!
When will you be fitting them? Porting?
Cant wait to get mine working.
Posted: Tue Aug 26, 2014 4:53 pm
by Blown v8
Fitting them over the winter,
Swapping this
To this one I picked up Friday from UK Blowers
Going to run it for a while,then the TA's will go on
Posted: Tue Aug 26, 2014 5:40 pm
by mgbloke
that's going to be mental!!!!!!!
Are you pleased with those rocker covers? Thinking of getting some.
mark
Posted: Tue Aug 26, 2014 5:55 pm
by Blown v8
Yes,unlike other makes I have had no trouble in them being oil tight,
Posted: Wed Aug 27, 2014 8:34 pm
by kiwicar
Hi
OK the usual mistake of not covering up everything in the background of your photo. . . is that a Daimler 250 in the back ground? with blower
best regards
Mike
Posted: Wed Aug 27, 2014 9:24 pm
by Blown v8
it does look like it !
I took the pic when I picked it up at UK Blowers,that's just one of their "mule" engines
