4 replies to this topic

[Miniflame1989]

Does anyone know what the equivalent to a Howley inlet manifold would be please? If not, the next best thing? I can't find a Howley anywhere I think any that are left have been snapped up.

[nicklouse]

The Maniflow cast one.

[croc7]

Does anyone know what the equivalent to a Howley inlet manifold would be please? If not, the next best thing? I can't find a Howley anywhere I think any that are left have been snapped up.

I have one. My contact information is in my profile, if interested.

[timmy850]

From Keith Calver
https://www.calverst...fo/carburation/


“Single SU inlet manifold flow test comparison
96.50 cfm - MG Metro standard alloy manifold as cast.
99.00 cfm - Howley 1.75" - previously the best available - this one was quite heavily modified to achieve this flow figure.
105.00 cfm - Titan Motorsport 1.75" as cast.
108.10 cfm - Mini Spares C-AHT770/A small-port 1.5/1.75" as cast.
112.11 cfm - Mini Spares C-AHT771 large-port 1.75" as cast”

[sonscar]

Very approximately a 998 engine at 100% efficiency pumps 106 CFM( or am I badly out on my calculations?)at 6000 rpm,Steve..