Sparks280zt Posted January 31, 2010 Share Posted January 31, 2010 High 7s, low 8s in the eight mile it looks like. Quote Link to comment Share on other sites More sharing options...
ColtGT4g63 Posted January 31, 2010 Author Share Posted January 31, 2010 7.3@ 98, Sucks not being able to put all the power to the ground! ALSO... I dropped a cylinder, and it cranks over like I'm doing a compression test now. And was racing on 7 cylinders the entire time. Tomorrow I start pulling the motor, and start looking for an iron block Gen3. Over all I had fun! Quote Link to comment Share on other sites More sharing options...
Slammed68 Posted January 31, 2010 Share Posted January 31, 2010 6.0 ftw!! Quote Link to comment Share on other sites More sharing options...
Cable Posted January 31, 2010 Share Posted January 31, 2010 7.3@ 98, Sucks not being able to put all the power to the ground! ALSO... I dropped a cylinder, and it cranks over like I'm doing a compression test now. And was racing on 7 cylinders the entire time. Tomorrow I start pulling the motor, and start looking for an iron block Gen3. Over all I had fun! Any signs of spark knock during the runs? Maybe just a popped head gasket? Complete long block LQ4's aren't hard to find. A couple of buddies have bought a few decent long blocks from LKQ.com cheaper than most Craigslist ads. Find a good long block, swap to a turbo friendly cam ('02-'04 LS6 cams work great w/boost), and hold on for dear life. Quote Link to comment Share on other sites More sharing options...
ColtGT4g63 Posted January 31, 2010 Author Share Posted January 31, 2010 The car already has an LS6 cam. It does quite well I must say! The MegaSquirt does not have an knock monitering, but the timing is extremely conservative! We'll see whats up when I take it all apart. Quote Link to comment Share on other sites More sharing options...
Z-Gad Posted January 31, 2010 Share Posted January 31, 2010 Looked like a wild ride Glad to see you are getting it sorted out !! Quote Link to comment Share on other sites More sharing options...
blueshark123 Posted February 1, 2010 Share Posted February 1, 2010 What size slicks were you running? What was your 60 foot? Quote Link to comment Share on other sites More sharing options...
ColtGT4g63 Posted February 1, 2010 Author Share Posted February 1, 2010 I'm running M/T ET drags. 26 x 8.5 x 15. 60's were 1.6Xsec. I have cut numerous 1.5's down there, and even a 1.4! At a different track I have lifted the front tire off the ground a little bit too. Quote Link to comment Share on other sites More sharing options...
Cable Posted February 1, 2010 Share Posted February 1, 2010 I'm running M/T ET drags. 26 x 8.5 x 15. 60's were 1.6Xsec. I have cut numerous 1.5's down there, and even a 1.4! At a different track I have lifted the front tire off the ground a little bit too. What was your 60ft with the latest turbo setup? Still running the same slicks? What mufflers are you running btw? Quote Link to comment Share on other sites More sharing options...
ColtGT4g63 Posted February 2, 2010 Author Share Posted February 2, 2010 I have cut a 1.4 the last time I was at the track, with the turbo. This most recent time to the track my best was a 1.6. The track was VERY slippery this time around though and no body got good times. I've been running the same slicks since I have got the car running in the beginning. In the videos the exhaust is going through 2, 9" resonators and dumping right before the axles. When I have the full exhaust on, I have two magnaflows in the back as well. 5x8" ovals. Roughly 1 foot long, straight through 3" Quote Link to comment Share on other sites More sharing options...
ColtGT4g63 Posted February 2, 2010 Author Share Posted February 2, 2010 Gosh darn it! Quote Link to comment Share on other sites More sharing options...
Cable Posted February 2, 2010 Share Posted February 2, 2010 Gosh darn it! Oh that blows!! That's a pretty decent sign of detonation dude. Quote Link to comment Share on other sites More sharing options...
ColtGT4g63 Posted February 2, 2010 Author Share Posted February 2, 2010 Oh that blows!! That's a pretty decent sign of detonation dude. Hardly, The piston tops look perfect. As well as the combustion chambers in the head, and cylinder walls. ♥♥♥♥ broke from either it being a weak cast pistons, and/or too much power through that baby! Quote Link to comment Share on other sites More sharing options...
Cable Posted February 2, 2010 Share Posted February 2, 2010 Hardly, The piston tops look perfect. As well as the combustion chambers in the head, and cylinder walls. ♥♥♥♥ broke from either it being a weak cast pistons, and/or too much power through that baby! I respectfully disagree. I've shattered more than a few cast piston ring lands because of detonation 'shocking' the pistons to much and causing the ring lands to become one big ring land. No damage to the crown or piston tops just means you weren't running lean (not a good thing with aluminum heads either). In my personal experience, normally when a piston comes apart because of too much power the wrist pins usually eject out of the bottom of the piston. I am not saying you aren't making power or your Z isn't fast, but I've seen more than a few of these stock bottom end LS motor get hammered with upwards of 20 psi and/or 250-300 shots of nitrous and keep on smiling (for a reasonable amount of time anyway). Regardless, sorry for your misfortune and good luck getting another LS motor and getting your Z back on the road/track. Quote Link to comment Share on other sites More sharing options...
ColtGT4g63 Posted February 2, 2010 Author Share Posted February 2, 2010 I get what you're sayin. Things were just WAY too conservative for me to believe that there was detonation going on. 50% race gas, low timing, boost, and a rich AFR. Whatever the culprit was... Hopefully it does not happen with a set of stronger internals. Quote Link to comment Share on other sites More sharing options...
Cable Posted February 2, 2010 Share Posted February 2, 2010 As the saying goes, stranger things have happened.... Here is a good post on LS1Tech on the subject: http://www.ls1tech.com/forums/8698815-post15.html Quote Link to comment Share on other sites More sharing options...
ColtGT4g63 Posted February 2, 2010 Author Share Posted February 2, 2010 With your past experience, what do you think I could have done differently to prevent this? Quote Link to comment Share on other sites More sharing options...
Cable Posted February 2, 2010 Share Posted February 2, 2010 I'll be honest, I am not familiar with the MegaSquirt stuff. Does it datalog? Can knock sensors can be used to retard the timing if any detonation is detected? Quote Link to comment Share on other sites More sharing options...
ColtGT4g63 Posted February 2, 2010 Author Share Posted February 2, 2010 There is no knock control with the MS unfortunately, but I do have data logs. I was running 10 psi of boost, and roughly 8 - 9* of timing at that boost level. With a splash of 100 octane for insurance. I'm debating on weather or not I want to build the LS1, or go find a 5.3 stocker to throw in... Decisions decisions. Quote Link to comment Share on other sites More sharing options...
Cable Posted February 2, 2010 Share Posted February 2, 2010 There is no knock control with the MS unfortunately, but I do have data logs. I was running 10 psi of boost, and roughly 8 - 9* of timing at that boost level. With a splash of 100 octane for insurance. I'm debating on weather or not I want to build the LS1, or go find a 5.3 stocker to throw in... Decisions decisions. Does the Megasquirt even log knock at all? Quote Link to comment Share on other sites More sharing options...
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