jnjdragracing Posted August 26, 2006 Share Posted August 26, 2006 Well after we went to the strip last week, I decided to do the routine maintenace on the engine in prep for SEZ. We burned a couple of plugs not to long ago, then the next to the last time we burned another plug. Did a compresion check and cylinder #8 was down, way down. The plugs we burned were cyl #5 once and cly #8 twice. Pulled the engine and dismantled, found a very burned piston on #8 and some slight damage to #5. When we burned the plugs we did a nos shot, too lean, plus the hot weather made it more lean. Dropped off the block to the machine shop to have it pressure tested, cly #8 we were concerned with. Got word today the block is okay. Ordered new pistons, rings, main and rod bearings. The heads were checked as well and had a bad leak on the back valves ( this was number 8 cyl.) also found some warpage on one head the other side where two of the cyl. were not sealing good. Glad I checked or we would of had a big boom at sez. Took the nos system apart and found the problem, the back fuel nozzle for #8 cyl. was cracked, leaking fuel I imagine. It broke off, had to drill out and retap. Have to order a new nozzle come Monday. Anyway hopefully all the stuff will be in and the machine shop through by next Tues. or Wed. then put all back together for SEZ. The crunch is on. Took the blower apart and all looks good. No problems..... The bearings ( rod and mains ) looked new. We run royal purple and it shows (good oil). Here are some pics. Wish us luck and hopefully no more problems will arrise. See ya at SEZ... John Quote Link to comment Share on other sites More sharing options...
jnjdragracing Posted August 26, 2006 Author Share Posted August 26, 2006 here are some more pics. Quote Link to comment Share on other sites More sharing options...
jnjdragracing Posted August 26, 2006 Author Share Posted August 26, 2006 Here are the last ones. Quote Link to comment Share on other sites More sharing options...
dr_hunt Posted August 26, 2006 Share Posted August 26, 2006 I can't tell you how many times I've seen nos motors apart cause it was lean on gas for whatever reason. Great when it works, nasty when it doesn't. If you went 10% over, ran a pair of C&S alky supercharger carbs, it'd make all the power you could want and probably too much for the car to handle or even your brother to drive! Quote Link to comment Share on other sites More sharing options...
Turbo Meister Posted August 26, 2006 Share Posted August 26, 2006 Glad you found it before SEZ. Hope it all goes back together so you won't miss the big event because there are too many people who think they can beat Your Z. Good luck. I'm looking forward to the videos. Hanns Quote Link to comment Share on other sites More sharing options...
Ansel Marrow Posted August 26, 2006 Share Posted August 26, 2006 Can you tell me about royal purple? Why use it over all other oils? Quote Link to comment Share on other sites More sharing options...
deja Posted August 26, 2006 Share Posted August 26, 2006 Get your butt out to the garage and put that thing back together. We will accept no excuses if the car doesn't show up at SEZ, LOL. Good luck, I know I for one want to see that bad boy run. Quote Link to comment Share on other sites More sharing options...
rytherwr Posted August 26, 2006 Share Posted August 26, 2006 Man, sorry to see that....somebody is looking out for you, eh? Best wishes in getting it back together and tuned for SEZ. H-m-m-m-m the folks who are challenging under the old conditions should re-think their strategy now that the motor will be kicking on all eight, me thinks....) Wayne Quote Link to comment Share on other sites More sharing options...
jnjdragracing Posted August 26, 2006 Author Share Posted August 26, 2006 I use normal oil havoline 10w30 to break in the engine and the rings to seat, then I run royal purple racing 21 when it is hot and racing 11 when it is cold. They offer so many types with different vicositys. It does not break down ( heat, fuel, nos. ) does not effect it. I have always used it in all my race / toys. I used to use castrol synthetic and then made the switch to royal purple when it came out. I had a sand rail, I was mud bogging and went into a bottomless pit, got stuck and really had to turn it up to get out. There was a stump hidden the mud and it ripped off my oil filter. After getting it out the motor was so hot it siezed up. Towed it back home. The next day I was it off. Replaced the oil filter nad oil. It cranked up with no problems. Ran it I guess a few more months and if I remember correctly had to tear it apart for a cam swap. the bearings looked new. That made a believer out of me. Royal pruple protected the surfaces even with no oil in the motor. go to www.royalpurple.com. When I change my oil, I strain it and use the old oil in my lawn mowers. John Can you tell me about royal purple? Why use it over all other oils? Quote Link to comment Share on other sites More sharing options...
Z-Gad Posted August 26, 2006 Share Posted August 26, 2006 WOW, I am glad to hear you found it before the big bang happened. See you at SEZ Quote Link to comment Share on other sites More sharing options...
jnjdragracing Posted August 26, 2006 Author Share Posted August 26, 2006 Oh we are comming to SEZ. if the motor is not back together then we will install my old 412 cu. with lots of jiuce. We should have the 355 back together in time if all goes well. So we have other options. John Get your butt out to the garage and put that thing back together. We will accept no excuses if the car doesn't show up at SEZ' date=' LOL. Good luck, I know I for one want to see that bad boy run.[/quote'] Quote Link to comment Share on other sites More sharing options...
jnjdragracing Posted August 26, 2006 Author Share Posted August 26, 2006 We are not saying we can be beat.... Never have said that. There is always something faster out there. All it takes is money.... It is all in fun. But we will be there and with a fresh motor. Watch out I can see the 8's now... Thanks for your support. John Glad you found it before SEZ. Hope it all goes back together so you won't miss the big event because there are too many people who think they can beat Your Z. Good luck. I'm looking forward to the videos.Hanns Quote Link to comment Share on other sites More sharing options...
jnjdragracing Posted August 26, 2006 Author Share Posted August 26, 2006 yep that is the problem. You do know we have to tame the engine down when we leave the line now. The little Z can't take it. But I will build the othe car tube chassis with a Z body and then we will pull all the strings. You are correct on the juice. But we are just using 20% of it. It was just the heat (lean) then the problem with the fuel nozzle for that side. It happens. We will adjust this time and should be okay now. I am just glad we found the problem and bad piston before it all came apart. It would of been nasty........ Wish you were comming but we understand. John I can't tell you how many times I've seen nos motors apart cause it was lean on gas for whatever reason. Great when it works' date=' nasty when it doesn't. If you went 10% over, ran a pair of C&S alky supercharger carbs, it'd make all the power you could want and probably too much for the car to handle or even your brother to drive![/quote'] Quote Link to comment Share on other sites More sharing options...
jnjdragracing Posted August 26, 2006 Author Share Posted August 26, 2006 Yep, you are correct. It still ran good. We were just off our 60ft. You can see by the videos last week and then the week before it was still running strong. It will be a little diffrent now with a fresh engine. Watch out Rip, here we come. All in fun, just hope to have a good time at SEZ and maybe run some 8's in the 1/4. John Man' date=' sorry to see that....somebody is looking out for you, eh? Best wishes in getting it back together and tuned for SEZ. H-m-m-m-m the folks who are challenging under the old conditions should re-think their strategy now that the motor will be kicking on all eight, me thinks....) Wayne[/quote'] Quote Link to comment Share on other sites More sharing options...
jnjdragracing Posted August 26, 2006 Author Share Posted August 26, 2006 You bet.... How are you doing with your tuning? John WOW' date=' I am glad to hear you found it before the big bang happened. See you at SEZ [/quote'] Quote Link to comment Share on other sites More sharing options...
dr_hunt Posted August 26, 2006 Share Posted August 26, 2006 Those are hypers that are in the pic'c correct? Rods look like some brand of H-beam. Is the block or the heads o-ringed? Quote Link to comment Share on other sites More sharing options...
jnjdragracing Posted August 26, 2006 Author Share Posted August 26, 2006 The pistons are forged made by speed pro - power forged for superchargers / turbo. I get a special price break on speed pro., the H-Beam rods are made by Eagle. Yes the block is O-ringed, with head studs. John Those are hypers that are in the pic'c correct? Rods look like some brand of H-beam. Is the block or the heads o-ringed? Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted August 26, 2006 Share Posted August 26, 2006 http://forums.hybridz.org/attachment.php?attachmentid=1181&d=1156555303 looks like classic (OOPS it went lean and detonation/heat did the piston in) Quote Link to comment Share on other sites More sharing options...
deja Posted August 26, 2006 Share Posted August 26, 2006 Oh we are comming to SEZ. if the motor is not back together then we will install my old 412 cu. with lots of jiuce. We should have the 355 back together in time if all goes well. So we have other options. John Its good to have a back-up engine! Quote Link to comment Share on other sites More sharing options...
jnjdragracing Posted August 26, 2006 Author Share Posted August 26, 2006 We have several backup engines. we have 2 complete 412cu. chevy's and a 406 cu. chevy and then the big block 496 cu. chevy. We were just having so much fun with the 355 supercharged engine. John Its good to have a back-up engine! Quote Link to comment Share on other sites More sharing options...
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