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mcreyaufmiller

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mcreyaufmiller Senior Enthusiast

mcreyaufmiller

Posted
Posted

Well,

 

Last week I completed the high performance build on my tranny and slid it back in the truck. When I was doing the test drive, I noticed that my oil pressure was low. I added oil. The next day I got a misfire on Cyl 6 code. I bought new MSD 8.5 wires, new coil, new cap, rotor and AC D Plat plugs (as recommended by a race enging builder). During the tune-up, I pulled the #6 plug and found it to be oil fouled. Large deposits, lots of wet oil. The first question: Does anyone know if this is typically faulty valve guide seals or is it a ring problem. I need to decide to rebuild the motor or replace it; which brings me to my next question: I have a 305 now. If I replace the motor, I would like to put in a 350. Will this be a direct swap of motors if I get one of the same design, or will there be come computer replacment and minipulation required?

 

I am trying to get some informed information before I make a decision to do a complete performance rebuild of the same block, or should I find a 350 and build that? Or even better, should I but a crate motor?

 

Decisions, Decisions, Decisions...........

 

Mike

mcreyaufmiller Senior Enthusiast

mcreyaufmiller

Posted
  • Author
Posted

Sorry, I left out a little more info. The oil pressure is down to below 20 at idle, and does not come up much at speed. The main bearings are gone (or almost gone). How about the swap? will they exchange eaisly?

Delray Enthusiast

Delray

Posted
Posted

Mike,

I was told that that swap will be work(I have a 93 that has a 305 and I want to put a mild 350 in it)Talk to Jesse at wait 4me.

Steve

OUMike Senior Enthusiast

OUMike

Posted
Posted
Sorry, I left out a little more info.  The oil pressure is down to below 20 at idle, and does not come up much at speed.  The main bearings are gone (or almost gone).  How about the swap?  will they exchange eaisly?

 

 

 

 

If its my truck I'd probalby just order a motor from GM. I know you can still buy that generation 350 all day long. IMO its not worth putting all the time into getting differnent motors to wire up correctly. An LT1 could be cool though.

mcreyaufmiller Senior Enthusiast

mcreyaufmiller

Posted
  • Author
Posted

I have looked at the crate engines and I am comparing them to what my local race builder does. Although there is a better warranty with the crate engines, I am looking at a core charge as well. My engine guy is going to build me a HO 305 that will crank out aprox 350 HP and work directly with my truck. The price works out to be about the same and the built motor will br balanced and blueprinted. No to mention that I am putting the electric fans and water pump on hte motor and I am also looking for a new pulley set for the motor as well.

 

At the same time, I am looking for the front and rear sway bars that are bolt on and also a set of stock Silverado SS wheels is anyone has any ideas......

OUMike Senior Enthusiast

OUMike

Posted
Posted
I have looked at the crate engines and I am comparing them to what my local race builder does.  Although there is a better warranty with the crate engines, I am looking at a core charge as well.  My engine guy is going to build me a HO 305 that will crank out aprox 350 HP and work directly with my truck.  The price works out to be about the same and the built motor will br balanced and blueprinted.  No to mention that I am putting the electric fans and water pump on hte motor and I am also looking for a new pulley set for the motor as well.

 

At the same time, I am looking for the front and rear sway bars that are bolt on and also a set of stock Silverado SS wheels is anyone has any ideas......

 

 

 

 

If your interested in getting some new wheels...I'd like to have your old ones..let me know.

 

I think I'd still go with the crate motor. What kinda mileage you expect wiht that 5.0L? Let us know how it works out :)

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