underdrive pulley u have 411 come in pls
04-15-2005, 12:12 AM
#1
underdrive pulley u have 411 come in pls
does any1 have any links for this mod? any information just curious on reading up...i couldnt' find anything on the stickies except for flywheel...can i get some help? thnks.
04-15-2005, 12:17 AM
#2
Stock Flywheel weight and upgrading
For those interested in objective flywheel data I put together some of my old posts: Number one, the 4 gen flywheel is NOT lightenable like the 3 gens are. The reason for this is because, our flywheel is a 2 piece set. The secondary ring gear is what the crankshaft position sensor reads. I got a call back from my machine shop who was gonna lighten my flywheel and they told me this. They unbolted the secondary ring gear from the main ring gear and they tell me that there really isnt any place to lighten the OE flywheel, and even if there was, there wouldnt be enough meat to remove to yield a siginificant difference. Now that I think about it, I dont think anybody in the 4th or 5th gen's have had their OE flywheel chopped. Only 3rd gen's including Jeff92se and Matt93gxe because their designs are different.
The formula according to Phuong for calculating flywheel weight reduction is:
1/2 FW weight * [(flywheel radius x gear x final drive)/(tire radius)]^2
On my 4th generaion, I am running 225 50 16s. I did the conversions and plugged in the formula. BTW, the 4th gen's M/T gearing is like this according to my FSM on page MT40. Ratios: 1st (3.285), 2nd (1.850), 3rd (1.272), 4th (0.954), 5th(0.795), Reverse (3.428) and Final gear is (3.823). For those of you who want to plug the formula in easier in 1st gear it will be 1/2 flywheel weight * [(120mm*3.285x3.823)/314.96mm]^2.
I got my OE flywheel weighed at the local post office, and they confirmed it was calibrated to spec, etc. The stock flywheel WITHOUT the secondary ring gear or bolts weighs 18 pounds, 7 ounces. I used my own postal scale and found the bolts and secondary ring gear to be 1 pound, 10.7 ounces. Add these two together and the total rotating mass (not including pressure plate) is 20 pounds, 1.7 ounce. Since the secondary has to be used with either flywheel the difference in weight is roughly 13 pounds, 7 ounces or 13.4375 pounds. from the Unorthodox Racing flywheel which claims a net weight of 5 pounds. Plug this number into our favorite equation up above and the weight reduction in first gear is equivalent of removing 153.8 pounds of static weight.
The other two options are the Mueller/Stillen Flywheel and the fidanza. The fidanza or stillen wheels shouldnt suffer any sorta drivabilty problem like the U/R at 5 pounds unit might. One thing about a lighter flywheel is that although it reduces rotating mass, it may produce a bog effect at the drag strip off the line.
^^^^
this is pretty much my explanation right?
For those interested in objective flywheel data I put together some of my old posts: Number one, the 4 gen flywheel is NOT lightenable like the 3 gens are. The reason for this is because, our flywheel is a 2 piece set. The secondary ring gear is what the crankshaft position sensor reads. I got a call back from my machine shop who was gonna lighten my flywheel and they told me this. They unbolted the secondary ring gear from the main ring gear and they tell me that there really isnt any place to lighten the OE flywheel, and even if there was, there wouldnt be enough meat to remove to yield a siginificant difference. Now that I think about it, I dont think anybody in the 4th or 5th gen's have had their OE flywheel chopped. Only 3rd gen's including Jeff92se and Matt93gxe because their designs are different.
The formula according to Phuong for calculating flywheel weight reduction is:
1/2 FW weight * [(flywheel radius x gear x final drive)/(tire radius)]^2
On my 4th generaion, I am running 225 50 16s. I did the conversions and plugged in the formula. BTW, the 4th gen's M/T gearing is like this according to my FSM on page MT40. Ratios: 1st (3.285), 2nd (1.850), 3rd (1.272), 4th (0.954), 5th(0.795), Reverse (3.428) and Final gear is (3.823). For those of you who want to plug the formula in easier in 1st gear it will be 1/2 flywheel weight * [(120mm*3.285x3.823)/314.96mm]^2.
I got my OE flywheel weighed at the local post office, and they confirmed it was calibrated to spec, etc. The stock flywheel WITHOUT the secondary ring gear or bolts weighs 18 pounds, 7 ounces. I used my own postal scale and found the bolts and secondary ring gear to be 1 pound, 10.7 ounces. Add these two together and the total rotating mass (not including pressure plate) is 20 pounds, 1.7 ounce. Since the secondary has to be used with either flywheel the difference in weight is roughly 13 pounds, 7 ounces or 13.4375 pounds. from the Unorthodox Racing flywheel which claims a net weight of 5 pounds. Plug this number into our favorite equation up above and the weight reduction in first gear is equivalent of removing 153.8 pounds of static weight.
The other two options are the Mueller/Stillen Flywheel and the fidanza. The fidanza or stillen wheels shouldnt suffer any sorta drivabilty problem like the U/R at 5 pounds unit might. One thing about a lighter flywheel is that although it reduces rotating mass, it may produce a bog effect at the drag strip off the line.
^^^^
this is pretty much my explanation right?
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