I was wondering if you guys changed your stock injectors after changing the pulley to the 3.12. I am currecntly running the 3.33 stock voretch pulley and was plannning on changing that pulley to the smaller 3.12 and was worried about the injectors. Thank you for all your help.

 

You rally don't need injectors until the 2.87 pulley - unless you do head work, etc...

 

it wouldnt hurt. U can pick up some cheap PE 350cc injectors that are drop in so u dont have to splice the clips together. THey run around 120-150 shipped used on my350z.com.

 

The 350cc's aren't a bad choice at all. The point is to make sure you don't run out of fuel and lean out at the top, and can get a great tune. The factory Injectors should do you fine though, and you can always put in a higher ratio disc into the FMU and increase fuel pressure based on boost even more if needed.

Rick

 

im changing from a 3.18 to a 2.87 pulley.. on a revup motor? would i need a retune? i now have 550cc injectors in the car. on a greddy emanage ultimate.. also anyone know of the belt i'll need for the 2.87 on the newer style revup setup.... thanks... sorry for sropping this on the post.

 

are you guys running the higher boost on the stock blocks???

Im getting tired of 400+rwhp I want to step up but I think Ill go BOOM

 

I wasn't....once I hit the 3.12 stock block was gone. I know others have gone up to about 10lbs though...

 

OK - so it's a 3.12 to a 2.87

You MUST re-tune - your power and boost levels will all be different - so don't go nuts with the car until it's tuned...be conservative!

The belt should be the 93" - but I'm not sure with the new pulley setup...You'd be looking for a belt that is about 3/4" - 1 1/4" smaller than what is on there now. So if you can get the number off of the one you have now, get 2 belts that are smaller, next 2 steps smaller, and use the one that works best. Whichever you do use - make sure you still have plenty of adjustment left - so go as small as you can - almost if you have to force the belt on the pulleys. It'll fully allow you to adjust as it stretches.

Rick

 

Yup, you definitely need a re-tune. I am running the 2.87 on the RevUp myself. Tuned right, it's a lot of fun.

 

off topic, but any of you guys noticed a difference going from the stock front bumper to an aftermarket bumper? Allowing more air to the intercooler?

 

Only if the aftermarket bumper has a larger opening for the IC to get more air from Then it will be more efficient.

 

thanks for the belt imfo... i'll wait to install the pulley when she is at the shop for a retune. i want to play it safe.