road-runner Posted March 1, 2008 Posted March 1, 2008 Sounds like a sherman tank or something on the History/Discovery Channel... Share this post Link to post Share on other sites More sharing options...
Waco Posted March 1, 2008 Posted March 1, 2008 Sounds like a sherman tank or something on the History/Discovery Channel... Open downpipes sound like that on a lot of cars. His sounds better because it lopes, though I'm not sure that's a good thing at this point in time. I'm surprised it's so quiet when de-revving, though I guess the turbo sucks up a lot of the exhaust noise. My car is loud as hell revving up and down (though mine is muffled): http://people.clemson.edu/~dbonnie/exhaust2.wav Share this post Link to post Share on other sites More sharing options...
airman Posted March 1, 2008 Posted March 1, 2008 (edited) I was thinking the same thing. Did you adjust the timing or something because I haven't heard a stock GT-T lope like that before. I also assume you're going to put a resonator and muffler on it at some point right? timing is dead on haha yeah, that was just for giggles when i replaced my oil pan gasket and i had the downpipe off. decided to crank her up and get some footage. at the moment i think my balance shafts have died - so i'm gonna jerk them out because they're only a reliability issue and i can deal with a little bit of vibration. plus, it gets rid of a lot of weight attached to the crank. i've seen people gain as much as 20hp by getting rid of the shafts. by the way: all four cylinders look just like that Edited March 1, 2008 by airman Share this post Link to post Share on other sites More sharing options...
Waco Posted March 1, 2008 Posted March 1, 2008 Nice. Why is it loping if you haven't screwed with anything though? Share this post Link to post Share on other sites More sharing options...
Andrewr05 Posted March 1, 2008 Posted March 1, 2008 Probably because the computer hadn't adjusted to the increased exhaust flow yet... Share this post Link to post Share on other sites More sharing options...
airman Posted March 1, 2008 Posted March 1, 2008 also, the lack of backpressure probably has something to do with it. also, the tank of gas is a few months old. Share this post Link to post Share on other sites More sharing options...
Waco Posted March 1, 2008 Posted March 1, 2008 also, the lack of backpressure probably has something to do with it. also, the tank of gas is a few months old. He's getting backpressure from the turbo. Share this post Link to post Share on other sites More sharing options...
airman Posted March 2, 2008 Posted March 2, 2008 (edited) He's getting backpressure from the turbo. there is still backpressure from my exhaust anyways - i have an update. my rear balance shaft bearings have screwed themselves up royally. i'm going to take them out during my free time of this week. it's bad enough that it actually has caused the area around one of the bearings to become discolored from the heat from the friction. my thoughts are that it spun the bearing there, and has blocked off the oil passage that keeps the thing lubricated. luckily that one's coming out in the near future. a scarier picture is of my crankshaft bearings... they were brand new about 100 miles ago when i did the rebuild. the crankshaft cradle bolts were torqued to spec. 18ft/lbs or 25nm. oil levels and oil pressure has been fine throughout running. Edited March 2, 2008 by airman Share this post Link to post Share on other sites More sharing options...
Kamikaze_Badger Posted March 2, 2008 Posted March 2, 2008 Ouch, that sucks . How much will all that cost to fix? Share this post Link to post Share on other sites More sharing options...
airman Posted March 2, 2008 Posted March 2, 2008 Ouch, that sucks . How much will all that cost to fix? i'm just going to trash the motor and get a 1st gen 6 bolt motor and slap it in there. the worst thing dsm has ever done was not go back to the 6 bolt motors after the massive failings of the 7 bolt. Share this post Link to post Share on other sites More sharing options...
Kamikaze_Badger Posted March 2, 2008 Posted March 2, 2008 Does this mean you're contributing it to crankwalk, or was that another flaw? And pardon the n00b question, but what's the difference between a six and a seven bolt motor ? Share this post Link to post Share on other sites More sharing options...
wormy Posted March 2, 2008 Posted March 2, 2008 found this on the net so here it goes A 6-bolt engine is one that has a 6-bolt flywheel - that is, there are 6 bolts holding the flywheel to the crankshaft. A 7-bolt motor has 7 bolts there. Along with the flywheel change, there are many other internal changes between the two engines. The crankshafts are different sizes, as are the rods and crankshaft seals. 6-bolt motors have 'big' rods, while 7-bolt engines have 'small' rods. The journal and bearing widths different, although the bearing diameters are the same. There may also be other changes between the two engines, and the parts are not interchangeable. The 6-bolt 4g63 engine was found in eclipse turbo models (gst and gsx) from 1990 to mid 1992. From mid 1992 till 1999 it was the 7-bolt. Many people have done an engine swap and put a 6-bolt motor in because it is less likely to crankwalk than the 7-bolt plus it's just a better motor. Share this post Link to post Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now