[RS Barn]

My wintertime projects are finally coming together. 

Project 1 was to rebuild a stock motor just to have around. A lot of race guys are using high mileage motors. They slowly drop power and start using more oil. I had the chance to buy a decent motor that was disassembled. I was helping the owner who lived close, but he realized he was in over his head. Every time I build a motor I forget how stinking long it takes. Just the cleaning process for brackets , nuts and bolts, engine parts and covers is astounding. Then the assembly is a slow and precise job. Lots of Loctite 574 and torque wrenches.

 

Project 2 was to build another Race motor. The engine builder in DC retired and felt I needed to take my race motor apart and spec everything before the information is lost. So this motor is sleeved, J&E pistons, Carrillo rods, 12.6:1 compression, balance shaft delete, ect, ect.,ect. $$$$$$$ 

The Piston and rod package is lighter by a whopping 1.7 Lbs. So I reduced crankshaft weigh equally and then have complete rotating assembly balanced to zero.

I expect around 310 HP @ 6500rpm. (at engine) with stock intake. I have spent the last few years messing with Camshafts and their many secrets. I now have racing Cams that will make great power without the lumpy idle and super rich running condition at low rpm.

 

Note: Picture of "fancy" pistons is from my current 290HP (@ engine) motor. That block isn't sleved.

Partial Post: Please Login or Register to read the full post.

[Rap]

Now that your out of engines to rebuild perhaps you need another one to work on! Wanna trade?

Partial Post: Please Login or Register to read the full post.

[RS Barn]

You are one of the track guys who may need a good  fresh engine at some point .Hopefully later than sooner. No more used ones from dismantled cars. They all have 50,000 miles on them

(per seller). I don't have a clue what it costs to do this. I will compile receipts at some point. Doing two engines at once leaves many receipt piles.

Partial Post: Please Login or Register to read the full post.

[ds968]

When I had my engine rebuilt last year, the mechanic strongly suggested that we replace the old rods with the stronger turbo ( 951 ) rods or with the Carillo ones , Many others on the forum said the same thing , as did my mechanic . That recommendation was because of the supercharger. although I suspect tracking a car might cause an equal or even greater stress and risk .

I opted for the turbo rods, just because he had a set ready . Note, the 951 rods have to be machined a bit ( a few mm off vs the standard 968 ones ) and then rebalanced

And If I manage to damage my six speed 968 engine ( again ..) one of these days, I'll definitely switch the rods in that one also, probably with Carillo ones this time.

Partial Post: Please Login or Register to read the full post.

[RS Barn]

The 951 Rods are a common replacement and are very strong. They are very beefy and quite a bit heavier than Carrillo, Wosner or Pauter. That said, they are readily available and about half the price even with modifications. I have them in my 290HP engine. We also modified big end for Clevite main bearings.

Partial Post: Please Login or Register to read the full post.

[ds968]

Is there any downside whatsoever to heavier rods ?

Partial Post: Please Login or Register to read the full post.

[RS Barn]

 Optimally, lighter with equal strength just offers less rotating mass. Stronger than OE but slightly heavier is a good option too. 

So with same rev limit I don't really think there is a downside.

Partial Post: Please Login or Register to read the full post.