What block to buy for a rebuild

EdE · 08-28-2008, 04:57 PM

Greetings, I could use some help in determining what motor should i start with as a rebuild. Hate to be so vague, however as i wish to build a motor for a car i do not own yet. I am not limited.

I believe I want to end up with a 3.0 w/ webers, but then again -- what do i know :-)

Is it possible that there are a few opinions as to what I should be looking for, or should I just buy the book to learn?

sww914 · 08-28-2008, 07:16 PM

You would do well to buy both Wayne's book and Bruce Anderson's book and study them before spending money. This board will help as well.

Fast Corners · 08-29-2008, 06:01 AM

What car are you planning on installing this motor in?

euro911sc · euro911sc's Garage

+ 1 on lots of research...

You can do a lot with a 3.0 or 3.2 long block. I would not buy a 3.6 unless you know exactly what you are doing. I would not buy a 2.7 unless I had a very special engine and car in mind or if you just want something to tear apart and sell for fun.... If I were to be putting it in an early car I would consider 2.2/2.4, but end up with the 3.0/3.2 most likely to have that early hot rod 911 factor. If I bought a car with matching numbers 2.0-2.4 then I would obviously keep it, but if I am starting with an engine w/o a corresponding chassis then its 3.0/3.2 again.

If you are forced to buy the whole engine, I would not get an MFI based engine as they are much more expensive. I would look for a CIS/Motronic kind. Best situation since you have expressed a desire for carbs is simply the long block: exhaust valves to intakes including: alternator, fan, fan housing, shroud, all engine tin, wiring harness, and mounting crossbar. Might also consider including the flywheel, though that may change depending on your motor application.

Enjoy!

Michael

P.S. No mag cases! Too much work.

EdE · 08-29-2008, 08:06 AM

Quote:

Originally Posted by euro911sc

+ 1 on lots of research...

You can do a lot with a 3.0 or 3.2 long block. I would not buy a 3.6 unless you know exactly what you are doing. I would not buy a 2.7 unless I had a very special engine and car in mind or if you just want something to tear apart and sell for fun.... If I were to be putting it in an early car I would consider 2.2/2.4, but end up with the 3.0/3.2 most likely to have that early hot rod 911 factor. If I bought a car with matching numbers 2.0-2.4 then I would obviously keep it, but if I am starting with an engine w/o a corresponding chassis then its 3.0/3.2 again.

If you are forced to buy the whole engine, I would not get an MFI based engine as they are much more expensive. I would look for a CIS/Motronic kind. Best situation since you have expressed a desire for carbs is simply the long block: exhaust valves to intakes including: alternator, fan, fan housing, shroud, all engine tin, wiring harness, and mounting crossbar. Might also consider including the flywheel, though that may change depending on your motor application.

Enjoy!

Michael

P.S. No mag cases! Too much work.

so is there a difference between the 3.0 and 3.2 long block(outside of the obvious displacement

)

am i correct in understanding that i should try an just buy the block. Don't bother with a junkyard unit as a whole. Is there a place to look for something like this. Buy the rest of the parts from Pelican.

I am more interested in the 70-73's for looks, and I would like the highest RPM possible out of a 3+ liter. 100hp/L sounds obtainable from what I have read. Guess that qualifies as a hot rod

It has to be a sleeper -- I gotta be able to drive to dinner in the thing.

I have had a couple 996's since college, and built motorcycle motors while i was still racing. So ideally i would like to meld all that into one vehicle. the noise and lust of a motorcycle, with the soul and passion of a 911. most likely impossible, but then again; if it keeps you out of the saloon.

euro911sc · euro911sc's Garage

I would buy a junkyard unit or a used engine off this board. there are just too many small parts that you wont be replacing that come with the full engine that you wont get if you just get a case. As long as you don't have to do too much case repair machining you will be good.

There are several differences in the 3.0 and 3.2 cases as well as Ps/Cs that come with them. Crank/rods are different as well so you need to really think about your endgame before you can make the 3/3.2 choice. 100hp/L is a great goal but there are many different routes of getting there as you know... some are very $$. An easy start is to go with the 3.6 from a later model car... many differences in case structure there.

If you formulate what kind of engine you want and what it will be used for this board will supply some very good engine combos that should get you close to where you want to go.

Best regards,

Michael

Fast Corners · 08-29-2008, 11:52 AM

Quote:

Originally Posted by EdE

I am more interested in the 70-73's for looks, and I would like the highest RPM possible out of a 3+ liter. 100hp/L sounds obtainable from what I have read. Guess that qualifies as a hot rod

It has to be a sleeper -- I gotta be able to drive to dinner in the thing.

Given what you have stated above...I would suggest back dating a 3.2 Carrera that has the G50 box in it. You could pull the motor and rebuild it with the power you want and have a nice reliable tranny to take that power. In addition you will get a whole bunch of modern ammenities that will be nice on your trips out for dinner.

It's probably more cost effective this way too when you consider the cost of a '70-'73 that is in decent shape and doesn't need $20K+ in restoration and upgrades.