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Hartwell / Holbay Tuning?

64beam

64beam

Donation Time
Hi Forum,

I was reading through my Alpine book last night (again) and read the article on the Hartwell stage III tuned Harrington Alpine. Are the two engine mods basically the same or did Holbay take it further?

Hartwell:
10.2:1 Compression
Twin 40mm Webers
Competition Manifolds & Clutch
Lightened flywheel
High lift cam
Etc, etc.

Not sure on the Holbay specs. Someone please fill in the blanks,

Regards, Robin.
 
alpine_64

alpine_64

Donation Time
Hartwell modified existing alpine components.

Holbay created a new head with smaller intakes, different combustion chamber shape and size, different cams, alloy sumps, different oil cooler mounting, different pistons ...
 
Wombat

Wombat

Donation Time
I think Hartwell modified 1600s in Series II or 3 and Holbay worked the 1725for the Arrow Range. Either would give a usefull boost in performance, But I think the Hartwell stuff would be even rarer than the Holbay ...
 
65beam

65beam

Donation Time
engine mods

hartwell did the modifications for the harrington lemans engines,holbay did the engines for the rapier h120 in the late 60's,early 70's.
 
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