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Author Topic:   351 c tunnel ram tunning problem
madmanmike
Journeyman

Posts: 18
From: brenham,Texas,washington
Registered: Oct 2002

posted 10-20-2002 10:17 AM     Click Here to See the Profile for madmanmike   Click Here to Email madmanmike     Edit/Delete Message   Reply w/Quote
I have a tunnel ram on a stout 351 c with roller cam and compression the carbs are 660 center squirters that have 72 squared jets and stock .025 shooters. the car weighs 3248 with me in it and has run a best ot 7.24 at 96 mph with a 1.73 60 ft (it has a bog) if you stomp it off idle 2.0 something 60 fts but if you foot brake it up to 3000 or so 1.7 something 60 fts. I called holley and they told me that fot the plenum size that the .025 squirters where way to small and it has a lean stumble. they told me to start drilling the orfice sizes out to .028-.031-.035-.037 and so on till the bog went away. the tunnel ram is the weiand hi ram. Has anyone had experience tunning a tunnel ram before ? If anyone has suggestions please post or you can e-mail me at [email protected] or call 9792518992
Thanks Mike

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Moneymaker
Administrator

Posts: 27499
From: Lyons, IL, USA
Registered: May 99

posted 10-20-2002 10:35 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Welcome to M&M Mike .
Holley is correct in their suggestions on increasing squirter size. I have had or worked on hundreds of FoMoCo multiple carb set ups over the years. The larger the plenum, the greater the pump shot you need. Another way to increase the signal and bottom end is to install two 4 hole one inch spacers under the carbs. (one under each carb)

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