On Fri, 13 Jun 1997, William Zehring wrote:
> are blowing by in their +4s its probably more than just intake/exhaust
> manifold polishing/tuning (i.e. its $$). Each contributes a very small
> percentage, that alone is imperceptible. Together they add up to a
> siginficant boost in horse power.
>
> Apart from the "no substitute for cubic inches" rule, and the use of nitro
Will, Don't forget that "breathing" won't do it all. This will
improve fuel burning efficiency... Being able to move the air faster
means higher RPMs too, It's also is a BIG help to balance the moving
parts to avoid damaging vibrations... If the +4s are Triumph engined
then there may be some serious cubic inch mods going on too, e.g. TR3
engines have 84mm bores, TR4 engines have 86mm bores (in stock
configuration). It is possible to increase the bores to 88mm without
any serious machine work to the block (wet sleeves drop right in).
With some machining you can use 89mm cylinders... Right, Ken?
>
> Will "Make mine a George Dickel" Zehring
>
Greg "A wee drappie of Famous Grouse, if you don't mind!" Petrolati
gpetrola@prairienet.org 1962 TR4 (CT4852L)
"That's not a leak... My car is just marking its territory!"
Greg Petrolati, Champaign, Illinois
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