-
I would like advise on side clearance when aluminum rods are replaced with stock steel 7/16 bolt dimpled ones. I had .030 side clearance measured in the middle of the two alum ones and now have .035+ between the steel ones. The motor is a 396 with floating pin 2242 trw pistons. Of course the steel rods have been bushed and drilled for floating pins also and spiral retainers.
This is the motor I crashed last year and figured while I was there, to replace the three year old and possibly tired SuperRods with ones I can forget about. I bought the motor this way and never planned on running alum rods in the first place but they seemed to behave just fine, so far. The motor turns 7400 with a 12 gear in my LaveyCraft and so far keeps close to the bigger inch motors. Now I am settling down and dont care about revs that high but want a strong bottom end. Will this increased gap cause problems for a circle race boat or occasional ski boat? Appreciate the help....
-
Better loose than tight. Run it.
-
Boyd, I always run .035 I like to pass the oil as fast as I can to keep the heat down, the longer the oil stays there the hotter it gets and it heats up the bearings as well which reduces bearing life, I have experimented with this and I found that the little amount more oil splash on the cylinder walls didn't hurt anything as long as you had good rings and the right hone on the cylinder walls!..
-
Mucho Gracias Guys, I didnt expect an answer so soon......It was sure great seeing the wrist pin bushings and oil hole already drilled in these FREE recon rods! Now, I guess I rebalance the thing and plug it in... Fiat....I always wondered why the handle? First car?
-
-
Mucho Gracias Guys, I didnt expect an answer so soon......It was sure great seeing the wrist pin bushings and oil hole already drilled in these FREE recon rods! Now, I guess I rebalance the thing and plug it in... Fiat....I always wondered why the handle? First car?
I was building this 48 Fiat (actually my third drag car) when my kids (computer nuts) said I just HAD to get on this thing called the Internet. They signed me up as Fiat48 and it's just been that way wherever I go. So I guess I am stuck with it.
-
I see this is already accurately covered and all good points made. For piece of mind, I just wanted to add an interesting anecdote:
Fords are factory spec'd at somewhere around .022" +/-, and my last build with my chinese rods put me at .032". I hypothesized along Fiat's point but was a little concerned where my oil pressure may end up. So I called the shop that did some work for me and the relpy I got was, "run it...between you and me, I've run as much as .125"!...but don't tell anyone."
:rolleyes:
Anyway, the point is clear...
LO
