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HRG ALUMINUM HEAD

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HRG ALUMINUM HEAD
#1
70t3 Avatar
70t3 michael smith
dunmore, PA, USA   USA
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Found a HRG crossflow aluminum head with twin webers and my question is will the head bolt up to a early 3 main 1800 that is being installed in 61 MGA


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Re: HRG ALUMINUM HEAD
#2
mgaex189 Avatar
mgaex189 Gold Member Giovanni Delicio
Obrigheim, Rheinpfalz, Germany   DEU
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1955 MG MGA 1500 "C2"
1955 MG MGA 1500 "4-seater"
1955 MG MGA 1500 "C1"
1957 MG MGA 1500    & more
WHERE do you find such gems ???
It will fit without any issues !!
Congrats

Gio

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Re: HRG ALUMINUM HEAD
#3
70t3 Avatar
70t3 michael smith
dunmore, PA, USA   USA
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Thank You. Saw a post discussing the HRG heads and one persons response was Nope wont bolt on.

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Re: HRG ALUMINUM HEAD
#4
SilasW Avatar
SilasW Gold Member Silas Kinsey
Canterbury, CT, USA   USA
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1966 MG MGB GT
Yes, it will fit but more photos are needed. If it is an early head intended for an MGA 1500/1600 the valves, ports and combustion chambers will be too small. The manifolds are early type and if the Webers are 40 DCOE, they should be fine (although I prefer Dellortos). In any event, it is not just a simple bolt on modification. Why do you think it was fitted and then taken off and put under the work table? It needs to be put in the hands of someone who knows how to port both the head and manifolds and will likely cost $1500 to get everything right. You will also need to resolve issues like repositioning the oil filter and heater valve. Do your research and then proceed.

Silas

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Re: HRG ALUMINUM HEAD
#5
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70t3 michael smith
dunmore, PA, USA   USA
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Thank you for the reply. Will go up garage and check and see if this is a early one. I have the original 61 engine that is locked up.
Also have very early 1800 that is fresh and mostly ready to install. Have the block off plate for heater already really didnt think oil filter would be issue with it point down.

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Re: HRG ALUMINUM HEAD
#6
Endoman Avatar
Endoman John Halton
Bolton, UK   GBR
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1957 MG MGA
1959 MG MGA Twin-Cam
1959 MG MGA Twin-Cam Coupe
1989 Porsche 944 S2    & more
Short answer yes. Long answer don't bother.
I used one briefly same set up on a 1622 engine back in the 70s. Exhaust seat burnt out and head distorted. Although they will take higher c.r. you will need exhaust valve inserts checking and combustion chamber volume.
They look super cool and the induction roar is fantastic but bottom line a decent flowed standard head will give similar if not more power, according to Peter Burgess
Then you have problems of access to distributor etc on the right hand side of the engine. Mine had the Twin-Cam inner wing panels which help.
Webers offer better tuning calibration imho. 40s ok for a midly tuned engine 45s for full race. they can work well if set up correctly but be prepared for major increase in fuel consumption. I saw a French car at Silverstone last year with the MSX head, worked well.

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Re: HRG ALUMINUM HEAD
#7
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70t3 michael smith
dunmore, PA, USA   USA
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Will put them up in buy sell trade forums if small combustion chamber.

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Re: HRG ALUMINUM HEAD
#8
59mgaguy Avatar
59mgaguy John Terschak
Wakeman, OH, USA   USA
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1930 Ford Model A "Jenny"
1959 MG 14/28 "Jessie"
1974 MG MGB "Oooops"
In reply to # 4787510 by mgaex189
It will fit without any issues !!
Congrats

Gio


Till you do a timing and have to adjust the distributor. spinning smiley sticking its tongue outdevil smiley

John


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Re: HRG ALUMINUM HEAD
#9
bills Avatar
bills Bill Spohn
W. Vancouver, , BC, Canada   CAN
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1956 MG MGA
1958 MG MGA Twin-Cam
1962 MG MGA MkII Coupe
1965 Jensen CV8    & more
Get me the serial number on the head and I can give you more info. or look at my site here https://www.rhodoworld.com/HRG.html for more information.




Bill Spohn www.rhodo.citymax.com/carstuff.html
Current: 1958 MGA Twincam (race car (170 bhp)),1962 MGA Deluxe Coupe (98 bhp)
1957 Jamaican MGA (200 bhp)1965 1971 Jensen Interceptor (350 bhp)
2009 Pontiac Solstice GXP Coupe (375 bhp)
2007 BMW Z4M coupe (340 bhp)
Recent: 1969 MGC roadster (175 bhp),Jensen CV8 (375 bhp),
1969 Lamborghini Islero S (350 bhp), 1988 Fiero GT turbo (300 bhp)
North Vancouver BC

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  riley1489 thanked bills for this post
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