l have a 1968 912 porsche the handling is great with the new supention on it what are the best upgrades l could get to make it get up to or over 300hp my motor now is is about 140 with the minor stuff on it mostly just the carbs what

could l add tuurbo,cold air intake,ornew ecu is any of that possable?
i all ready have flowmasters for it jsut not instaled

yea all of that is possible maybe nitrous and an exhaust
you could even put a new and bigger engine in it

You might would have to go with the 6 cylinder 911 engine to get more horses. If u added a turbo, u would probably need a different head because of the compression. 300hp would be pretty hard to achieve with that existing engine & also to maintain durability. 200hp might could be obtained. Probably ur best bet would be to ask people on Porsche forums that r familiar with these engines. With added horsepower the transmission would be a worry to whether it could take the extra torque. A modified 911 drivetrain might be the way to go, but it will cost a lot of money. Porsche parts r not cheap unfortunately.

There is no ECU, they did not start using those in cars until the mid-late 70s or so.

Get a 6 and make it a REAL Porsche

The engine is not designed for a turbo, so it probably would overheat and the engine would not be able to take the added pressure. You'd need to upgrade the entire engine to make it stronger, but that would be immensly expensive.

300hp?! The easiest way to get that kind of power would be to sell the 912 & put the money towards a different car. both the easiest & cheapest.

Adding a turbo to ur current engine is possible. but to run enough boost to get to 300hp will probably blow the engine very very quickly. Of course, since the stock brakes will not come close to handling the power increase, there is a chance u will simply wreck the car before the engine has a chance to blow. either one could happen quite quickly.

Transplanting a different engine is possible. a 930 engine would definitely fit the bill in terms of power (probably about $8k + another $2-5k in custom work to fit it), though u will then need suspension upgrades to deal with the heavier engine & better brakes to handle the power (another $8k should cover it). all of which means u will have spent somewhere over $20k. If u sell the car, u will MAYBE get $1-2k of this back (or may sell for less since most people looking for a 912 would not want this, & no one looking for a 930 would consider it). This would be the same issue if u look to transplant a 993 engine or a 996 (only the 996 would likely cost much more to fit due to the radiator requirement).

Some have fit SBC V8s into these cars. which will meet the power requirement. However, do not expect to be able to turn a corner! The higher center of gravity with this engine makes the car very unstable (have personally observed this at track events. very fast on a straight, & then very slow in corners. ultimately slower than regular 912s in lap times). Cost here will be a little less than the 930 upgrades would. but still well more than the value of the car.

Also, the 901 transmission in the 912 will not handle any of these options in terms of power. so add another $5k here for a 915.

So. the simple way, that will have the best resale value & the best chance of working correctly: Take the $25k u wo not be spending to upgrade the 912, & put it with the money from selling the 912, & seek out a very nice condition 930.

Dude,

It is a 912. Leave it as a 912 & enjoy it for what it is.

If u r dead set for horsepower, & r going to butcher it anyway, then put a small block Chevrolet V8 in it. You will have a rocket ship. It wo not really be a Porsche, but it will fly. 300hp is nothing for a SBC. Standard crates make 350hp & up. l have a Healey with a Chevy V8 that makes over 440hp on the dyno custom built for me by a NASCAR engine builder in NC. If u get serious email me & l will give u their contact info.

You will need a 915 transmission (or a G50) to handle the extra power, but you'd need that anyway to handle ur stated horsepower goal.

There r two outfits that make kits for this. Links below.

First off what cc motor is in it now? is it the 1991 cc? l had a '66 with a 1991. But then swapped the motor with a lower compression 2180 cc to accept turbos. make sure your carbs are 44 is or higher and properly jetted and set.