Fiero 2m8 LT1 NX Roadster conversion (Page 12/46) Fiero2m8 JUL 08, 05:35 PM I've decided to switch from NGK TR55 plugs to new NGK TR6 (one step colder) for the nitrous application: I had to tap the tension bolt hole in the head and used two fender washers for alignment purposes. I am using the MSD Blaster coil that will be mounted here: Just need to pick up a new belt before tightening everything up. Fiero2m8 Fiero2m8 JUL 11, 03:14 AM I picked up the next belt 1/2" x 38" long. After slipping it on Idiscovered a new way to install and tension it by yourself with a pry bar between the alternator and A/C portion of front motor mount without having to jack the car up or work from underneath! I didn't even have to hold the pry bar, just wedged in a crescent wrench while I tightened the alternator bracket with a socket set: All the coolant hoses are installed and just need to be tidied up and secured properly before the wheelwell liner goes back in: My LT1 has a vented Optispark, and since the intake in now on the other side of the car, I chose to run the line to an extra filter I had: Here is a shot from underneath the Optispark - 1 vacuum line goes to the intake and the other to the filter to draw air through it and help keep it moisture free: Next, I reinstalled the the existing Fiero fuel lines and new filter. I had to extend the lines with new ones along the trunk wall to the regulator that is now on the passenger side due to the reversed intake: The new brake booster filter was installed well away from the stock location that was very close to the front header: I was pleased with how the EVAP cansister came out using Tremclad Flat Black and Aluminum Wheel paint for the bracket: Vacuum lines are next and are currently a work in progress...Only question I have on them so far is: I have a PCV valve installed in the intake but I also have an opening on the rear valve cover. Where should I run lines from these items to or do I need both etc? See picture below of PCV location in center of intake and vent location in valve cover: Surely I don't need two but don't want to create a vacuum leak either. Any suggestions would be appreciated as my memories good, but short Thanks, Ryan & Fiero2m8 Deabionni JUL 11, 09:56 AM I can't believe that I haven't seen this thread before today. Great job, and excellent write-up! I can't wait to see it finished. HarryG JUL 11, 03:19 PM Fiero2m8, quote A couple more pictures: The LT1 intake has been reversed - cutting and welding my orginal 1994 intake didn't work out so good, so this 1996 intake is going to be used. Fiero2m8 Can you explain a little more about the "cutting & welding that didn't work....."? Any mods to the '96 intake? or, just lots of RTV to seal the ends? Thanks! Harry MotorTV JUL 11, 06:17 PM quote Originally posted by Fiero2m8: Vacuum lines are next and are currently a work in progress...Only question I have on them so far is: I have a PCV valve installed in the intake but I also have an opening on the rear valve cover. Where should I run lines from these items to or do I need both etc? See picture below of PCV location in center of intake and vent location in valve cover: Surely I don't need two but don't want to create a vacuum leak either. Any suggestions would be appreciated as my memories good, but short Thanks, Ryan & Fiero2m8 Yes you need two... and don't call me surely :-)... The pcv valve gets hooked up to the port in the center under the throtle body.. ( this draws air from the crankcase to the intake vacum) The line from the rear valve cover is hooked to the large port on the side of the throtle body.. (This is a port to the air filter side of the throtle plates... it is the "in" for air to the crankcase...) Hope this helps... Chuck btw... you are going to find that the line you pluged on the water pump.. (the line that goes nowhere in Wiston's pic) is REALY needed.... Fiero2m8 JUL 12, 01:59 AM quote Originally posted by MotorTV: Yes you need two... and don't call me surely :-)... The pcv valve gets hooked up to the port in the center under the throtle body.. ( this draws air from the crankcase to the intake vacum) The line from the rear valve cover is hooked to the large port on the side of the throtle body.. (This is a port to the air filter side of the throtle plates... it is the "in" for air to the crankcase...) Hope this helps... Chuck btw... you are going to find that the line you pluged on the water pump.. (the line that goes nowhere in Wiston's pic) is REALY needed.... Hi Chuck, Thanks for confirming what I researched and jogged my memory on this morning. I searched and found out that the top TB port is an air passage and have since connected a line to the valve cover. When I was taking a couple pics tonight, I found the port under the TB and it jogged my memory that it went to the PCV. I'm a little confused on the water pump port, maybe you can elaborate. My theory is this: When I bought the LT1, there was no port in that location on the water pump that came on my motor. I have since replaced the Optispark and waterpump and the replacement pump did have that port that I never used last year. This time around I also omitted the "Tee" in Winston's diagram as I am not using the TB coolant lines or the water jacket steam tubes. It sounds like you are using it on your setup - where does it go? Thanks, Ryan Fiero2m8 JUL 12, 02:10 AM quote Originally posted by HarryG: Fiero2m8, Can you explain a little more about the "cutting & welding that didn't work....."? Any mods to the '96 intake? or, just lots of RTV to seal the ends? Thanks! Harry The 1994 intake was sent out to a third party for welding and I never got it back. They provided the 1996 intake at no charge. Rod did have to grind a spot on the front of the block that would have caused a problem, but otherwise it just has a good amount of adhesive silicone on there. He did mention that the two intakes were not completely identical, however the 1996 intake in still not symetrical as shown in these pictures: Ryan Fiero2m8 JUL 12, 02:24 AM Now, on with the show (I went to the drive-in Friday night) I cleaned up my K&N filter and after it dries, I will re-oil it red before installation: My CAI design uses the stock elbow with the IAT in it and approx 18" of 3" stainless steel boiler venting I had. The flexible end of the elbow will allow me to angle the stainless towards the driver's side air scoop where the K&N filter will reside just in front of the wheelwell liner: All the vacuum lines are finished, so my next posts will be on the Throttle cable / TV cable setup and then the shifter cable that will probably have to be "CUSTOM". "Custom" seems to be my new favourite word on this project Shirley Fiero2m8 JUL 12, 02:28 AM quote Originally posted by Deabionni: I can't believe that I haven't seen this thread before today. Great job, and excellent write-up! I can't wait to see it finished. Me either - welcome to the thread, I'll try my best to answer any ?'s you have along the way. I have a goal to have it running by my birthday this month, so stay tuned... Rye Fiero2m8 JUL 12, 03:55 PM Here is the throttle setup. It normally would have been straight forward, but the design of the Nitrous express rail and the fact I wanted to reuse my Corvette fuel rail covers made it tricky. The TV cable adapter from Street and Performance is attached to the stock Throttle Body (TB). http://www.hotrodlane.cc/ The stainless nitrous lines and nozzle interferred with the throttle bracket, so I modified it to sit closer to the TB as shown here: The only problem I ran into was I couldn't get WOT - it turned out to be a problem under the gas pedal. I had to remove insulation under the carpet in that area on the firewall and now it's good: The TV cable needed to be shortened and then I fully depressed the throttle to allow it to set itself to the proper position. I still need to hook up the WOT switch for the Nitrous Kit but I will do that later. The vacuum lines are in place. Top left port on TB to rear valve cover. Middle left port to EVAP canister. Bottom left and right capped throttle body antifreeze/coolant passage. Center vacuum port on intake below TB to PCV valve on side of intake: The largest port on the side of the intake is for the brake booster. I also have two red vacuum lines on this side, one for the fuel regulator and the other is new for the vacuum modulator on the transmission. The other side of the intake uses one port to draw air from the Optispark, and the other is capped for future use if necessary. Fiero2m8