building a M64/50 1994 turbo motor

AskewRSR · 02-08-2010, 05:24 PM

Hey, I am currently refreshioning a 1994 3.6 liter turbo motor that I bought from Brumos last year. Just tore down the motor and it appears that they only put some "hot" cams in the engine. Putting some new rings in. I want to go back with ARP rod bolts and head studs. My mechanic says that the engine has never been fired. It was an extra engine for a Hillclimb car they built years ago. What upgrades would you suggest for me? I am not a professional engine rebuilder and would like some input. Porting? knife edge the crank?? Boat tail the mains?? I want to build a very dependable engine for a street/track car. What would you do???? Cost to performance analysis....thanks. tate

AskewRSR · 02-08-2010, 05:32 PM

a few before pics

930gt-40r · 930gt-40r's Garage

Set of rods- if you ever want to push the engine really hard, you are going to want them. I would shuffle pin it and not waste the money on boat tailing- I did it on my motor and it is an expensive do nothing mod on a low rpm application. How about larger oil squirters for the pistons? Or maybe a gt3 pump? I also suggest port + polish- I imagine with the better cams that she could breath much better with some porting.
Just suggestions- I would definitly not put that motor back together with out a set of Carillos or Pauters or if your wallet permits, Pankle Ti rods

A 3.6 motor with good rods can make pretty giant numbers when converted to EFI.
My vote would be: shuffle pin, rods, porting, larger piston squirters

AskewRSR · 02-10-2010, 05:04 PM

Thanks Kris. This is the kind of info I was looking for. tate

AskewRSR · 05-27-2011, 06:55 AM

Here are some pics of the Case mods: shuffle pinning and boat tailing. The crank was micro polished and the main was grooved and cross drilled. Ollies did all the work. I decided to do the "windage" mods to the case and the cylinders. I.E. Boat tailing the mains and Mooning the cylinders. I understand that these mods are for high rev motors. I want to see if they make a difference in a 3.6 L turbo motor. We hand finished the boat tails just like the factory race motors. I also saw a case at the Brumos Racing Engine room with the same treatment. The last pic is of the "sister motor" to mine. Don Leatherwood was kind enough to give me a tour of the Brumos Racing Engine room. I bought this motor from the Brumos Race shop a few years back. Enjoy

Flieger · Flieger's Garage

No knife-edged crankshaft?

Reaper930 · 05-27-2011, 11:15 AM

Quote:

Originally Posted by 930gt-40r

A 3.6 motor with good rods can make pretty giant numbers when converted to EFI.
My vote would be: shuffle pin, rods, porting, larger piston squirters

Kris is damn right - with the right cams in, headwork is so important. But also think insurance not just performance. Flame ringing is a must for big boost, and upgrade the valve springs to motorsport spec so you don't float at upper prolonged RPM.

What injectors are you going to run? Also what ignition system?

AskewRSR · 05-28-2011, 04:23 PM

Thanks for the responses. I must say that this car is going to be a 80% street and 20% track car that I do not plan to rev over 7,000 rpms. I currently plan on using a K27 HFS from Kevin. I want to retain the CIS and want to keep this motor as close to Brumos race ready as possible. They were running a very outdated Garrett turbo that I will not reuse. I want a conservative and reliable 450-500hp. I don't want to get too greedy.. Tate

Walt Fricke · 05-28-2011, 08:43 PM

F. Scott Fitzgerald once wrote that the rich are differenty than the rest of us. I'd modify that to say that turbo guys are different than the rest of us.

A modest 500 HP for a street motor. Right.

I recently asked a turbo guy if his engine really dynoed at 1000 rwhp, as I had heard claimed by others. Oh, no, he said, nothing like that. The best I ever got was only 910.

Only, indeed.

Walt
at Buttonwillow