Author Topic: A7 head with 1 1/16 inlet???  (Read 1936 times)

Online muskrat

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Re: A7 head with 1 1/16 inlet???
« Reply #15 on: 18.05. 2012 07:53 »
G'day Alan,
 yep a 400 would be pretty close. I run a 32mm concentric on my '51 A7 ('57SS top end 357 cam and straight through exhaust no air filter) with a 420 mains.
Dutch, the car hit the gutter (dirt road) the trailer jumped it and side swiped the tree. All at 60MPH. The XT didn't budge and was OK.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

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Re: A7 head with 1 1/16 inlet???
« Reply #16 on: 18.05. 2012 12:36 »
You may have trouble with turbulence at the intake inlet.  It being smaller than the carb bore creates a "step in the wrong direction."

Joe
1961 Super Rocket
1957 Road Rocket
2009 Harley Electra Glide Classic
1993 Harley Springer Softtail
1970 Harley Sportster Chopper
1957 Harley Panhead Chopper
1982 Yamaha XT550
2001 KTM EXC 400
1970 Honda CT70
Southern Illinois, USA