Perking up an old 90

[dropbear68]

I have a 1967 90 hp 6 cyl tower of not much power lol, what can be done to hot one of these old dears up, abit, she has a michigan bronze 3 blade prop, dont know much bout the rest

 

[fastjeff]

The same displacement yielded 100 hp. so there's 10 hiding in there. (I believe the 100 used larger carbs.) Ten hp won't make much difference, however.

Jeff

 

[faztbullet]

Not worth fooling with for 10hp......may help hole shot a tad.

 

[Boobie]

On a motor that old you may want to try a Good De-Carb on it.

 

[Ed-Mc]

The only year for a 90hp Inline Six in the Sixties was 1965. So you've got quite the Classic Tower of Power on your hands!

You can bolt up a set of 100hp carbs and you'll gain a bit on midrange-to-top-end, and also you'll use a bit more fuel.

The 100hp models also had wider reed stops to intake more air/fuel charge, so you won't get the full 10hp increase but it'll still be noticeable.

HTH..........ed