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i have been reasearching this subject for a long time because my 914 1.7L is just plain dog slow!
i called up renegade hybrids and asked alot of questions.
it costs $2000 to send them your tranny and have it rebuilt and have taller gears placed inside with 1st gear removed.
the basic kit from them is $1500 and that doesnt include cooling and other odds and ends.
and the 914 tranny is limited to 300hp i believe they said. so that means if your building a serous 350 (400-500-600hp) you need the 915 tranny out of a 911. this is alot more money!
JMO it isnt worth it, price vs performance, it is a better buy to mod the crap out of a 2.0L engine and get it to 200hp.
because the 2.0L weighs alot less than the 350 and the 350's water cooling. (water is heavy stuff)
this is what im gonna do. i have a spare 2.0L in the girage, its a runner but stock. im going to put dual 44 webbers on it along with a extreme cam, lifters, ported/polised heads, custom zero restriction headders with no mufflers, euro mahle high comp pistons, 009 dist, and get the whole thing straight bored and balanced with a external oil cooler to boot.
i will build it myself to save money, but have the machine shop do all the work i cant.
a 200hp 2.0L will still last a long time if built properly, and because its so light compared to a chevy, it equals a 250hp chevy engine. (power to weight ratio)
to top it off i can stay all porsche and dont need to have my tranny sent in for a $2000 custom rebuild.
if your lookin for top of the line all out speed 914, chevy or another engine is the way to go, but price vs performance, a wildly hopped up
i have a couple G's saved up for the engine mods. i figure i can buy the dual 44 carbs from a disgruntled 914 owner who wishes to go back to FI, maybe a 009 used dist as well. but everyhitng else will be bought new.
figure it will cost about 2G's to hop up the 2.0 using used parts and doing it myself.
cam and rollers=300
mahle euro high compression pistons=400
used 44 webbers USED= 400
used 009 USED= 50-75
port/polish/straightbore/balance=400
custom high-flo headders=make myself
misc=the rest of the money seals gaskets etc..
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