hey guys, i am comtemplating a SR20VE or SR16VE N1 swap into my base model 91 sentra. Im leaning towards the SR20VE because of availability. anyways i searched for info on the SR20VE swap and i noticed that a lot of people are using their stock SR20DE ECU's and using some sort of RPM switch for the VVL. According to the guy selling me the SR20VE, he said that the motor will come complete(w/ ECU, cut harness, etc.). Why do people use the stock SR20DE ECU? ALso i have a leftover set of UR pulleys, but i heard that the VE motors have a harmonic balancer. Is this true? If true that would mean i couldnt use the pulleys right? sorry for so much questions but your help and advise would be greatly appreciated. thanks in advance.

ohh and also, would it be safe to run the SR20VE and SR16VE N1 with our 91 octane piss water that we have in hawaii? The SR20VE has a 11:1 comp ratio and SR16VE N1 has a 12:1 comp ratio, correct?

1. Because most do not run the VE wiring harness in their cars. Many drop the VE into their SE-R's, in which the stock US wiring harness is very similar to the VE harness, only missing the VVL cam triggers. Which is also why you've seen installs with manually triggered VVL using a few different methods. They use the DE harness, requiring the use of the DE computer for compatibility with a little sprinkle of JWT magic on it. If you choose to use the VE harness, the VE ECU should work fine. There are a select few that have done this with success.

2. UR pullies will not work on the VE to the best of my knowledge. The crank pulley does not fit properly due to the harmonic balancer and from experience that I witnessed, the water pump pulley was causing more cavitation of the water pump, causing the stock VE WP pulley to be re-installed. The other 2 may work, as I haven't heard of any weird side effects to using the PS and alt pulleys, I would not advise using them myself.

Anyone feel free to correct any misinformation or to add any details I may have left out. Just trying to be helpful.

Any idea why the WP pulley would cause more cavitation? I always understood that the water-pump should be less likely to cavitate if spun at a lower RPM.

Ben
92 SE-R

I'll have to double check but I'm pretty sure the UR and VE water pump pulleys are the same size. If cavitation is a problem you should consider using a larger pulley.... I believe Pat Griffith is using one from a Stanza.

Steve

Originally posted by frkpwr
Any idea why the WP pulley would cause more cavitation? I always understood that the water-pump should be less likely to cavitate if spun at a lower RPM.

Ben
92 SE-R

Because I was told that the WP pulley was smaller and made the water pump spin faster than OEM. That's why it was removed and the OEM VE pulley was re-installed.

I looked at the two side by side and from what i can remember the UR pulley was very close to, if not the same size as the stock VE one. Although I was VERY tired by that point of the install, so i might have overlooked a very small difference?

I don't see how the UR pulley could cause any water pump problems. I also really dont see any reason to use it from what Jim just said in another post (rubbing issues).

Originally posted by 98sr20ve
I don't see how the UR pulley could cause any water pump problems. I also really dont see any reason to use it from what Jim just said in another post (rubbing issues).
Rubbing issues were on the crank pulley not the wp pulley.

i am using the stock 94 se-r harnness with the ve ecu on hardkorres car ,it will run/drive with de maf or frontier maf untill we send the ecu`s to jwt