To 5.7, or not to 5.7?

[Doug_Guilds]

Here is the deal. Going to race 2 tracks this season and one has a lb per cc rule. Is the 200 pounds I will have to add to my car worth the gains I will receive from a long rod application if I am only adding longer rods?

[Fullthrottlex02]

Deppending on track length. I perfer the 5.4 stock rod. But thats just me

[drtlvr]

Here is the deal. Going to race 2 tracks this season and one has a lb per cc rule. Is the 200 pounds I will have to add to my car worth the gains I will receive from a long rod application if I am only adding longer rods?

NO. There's not that much power there. Not 200 pounds anyway.

[Milford Motorsports]

If you are running a big track where you don't have to lift,the 5.7 will probably give a slight advantage.On a short track where you are out of the throttle quite a bit,5.2 rods would be my choice.BUT if there no right left percentages,the extra 200lbs. may be an asset.

[Foghorn]

You aren't adding CC's by going to a longer rod. You can have a 2.3 with 5.2 rods or 5.7 rods.

[84Dave]

Or adding 200# to the race car for only long/aftermarket rods is a stupid Rule! -84Dave-

[Doug_Guilds]

Am I wrong thinking that adding 5.7 rods makes the 2300 a 2500? The block is .040 over with stock rods right now, head is an E1 with 140k cut off if that makes a difference.

One track is 1/4 mile and the other is 1/3 mile. I haven't raced the 1/3 mile track so I am not sure if the corners are tight or sweeping.

[istock11m]

Longer rod will not change the size of the engine. Bore and stroke determines the size.

[Doug_Guilds]

Longer rod will not change the size of the engine. Bore and stroke determines the size.

I see where I went wrong there, I was confusing rod length with crankshaft stroke. I found a good post by Joe of JBV explaining the 5.7 rod features and a couple failings as of may 07. If I were to go with a 2500 setup I would have to get a 2.5 crank and a small journal block, so that may be a future project. Thanks all for the responses.