Ok this is gonna prob be for the guys who actually rev past 75k. I have read that the s13 water pump kinda craps out at that high of rpm, and you need to upgrade to a s14 water pump due to better flow or what ever. Is this true?

 

Whoa! You rev to 75,000rpms?!

Supposedly the S13 SR waterpump cavitates at high rpms. This would only be a problem if you're road racing, drifting or something where you're spending a lot of time at 7k+. It was concluded a while back that an S14 pump is not the answer. I think that the cavity in the block on the S14 is shaped differenly to take advantage of the S14's different pump. All that you can do on S13 is underdrive the waterpump and hope that you still have enough flow at low RPMs to cool at idle.

 

haha lol yeah i was typing fast there sorry about that.

so basically i would be fine then on the stock pullie. really the only time it will see the high revs is track or ounce in a while a quick street pull, or dyno. I would rather not chance trying to stay cool at idle, when using a underdrive pullie, aspically in tampa.

How about them elec waterpumps is that worth the money or what?

 

I have never had a problem with my oem s14 pump and oem pulley reving to 8.5k - 9k on my SR. Electric pumps are great if you have an extra $450 to spend.

 

Awsome tim i figured you would have jumped on this post thnaks.