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I've never done a TW with a camshaft that small....

December 4 2017 at 3:14 AM
Brent Lykins  (Login blykins)

Response to How much motor do you need to effectively use a Tunnel Wedge?

....but I've done a 482 with CNC ported Pond heads and a ported Victor.

Customer's engine went into a Cobra replica. Originally had a 260/265 @. 050" solid roller and after putting a year's driving time on it, he decided he wanted something that would chug around a little easier. I sent him a much smaller solid roller that would peak at around 5500 or so. He enjoyed it much more on street driving.

Now granted, this was a 2500 lb car with a 3.50 gear, but the 482 could pull hard enough on the single plane intake to make it streetable.

The only variable I would change in your scenario would be the rearend gear. I think a 3.33 would be as high as I would go with a heavier car and would feel comfortable with something lower.

If you look at things with a volume vs velocity approach, you're trying to get a large volume of air to accelerate and move very quickly with the TW and ported heads. If the velocity is low, then the engine will be not as responsive down low. The high rear gears would really exacerbate that.

This message has been edited by blykins on Dec 4, 2017 3:15 AM

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