Soild Roller Lsx down on power
yeah, for the record, if someone from a centrally located fbody shop, has ever touched your car... dont be surprised if you have two drivers side coil pack harnesses when you go to relocate the coils and extend the harnesses.
I thought I was getting it done when I could copy the pass from the drivers Id be doen in no time.... who knew GM had different harness for each side and I shoudl do the opposite of what the book says lol
I thought I was getting it done when I could copy the pass from the drivers Id be doen in no time.... who knew GM had different harness for each side and I shoudl do the opposite of what the book says lol
Originally Posted by GrannySShifting
yeah, for the record, if someone from a centrally located fbody shop, has ever touched your car... dont be surprised if you have two drivers side coil pack harnesses when you go to relocate the coils and extend the harnesses.
I thought I was getting it done when I could copy the pass from the drivers Id be doen in no time.... who knew GM had different harness for each side and I shoudl do the opposite of what the book says lol
I thought I was getting it done when I could copy the pass from the drivers Id be doen in no time.... who knew GM had different harness for each side and I shoudl do the opposite of what the book says lol
The harnesses can't be different. we swaped the hole side left to right plenty of times.
Originally Posted by GrannySShifting
howd you manage to not have those firing? did you rewire something?
all the injector wires r fine with the noid light and mesure 9.2 volts even changed the injectors around side to side no diff coil is fine and its geting 13.5 volts checked the plug wires for resistance and there all fine... even thought the way the fuel rail was setup it wasent geting any fule changed that no diff... every cylinder is 250ish now and the #2 is 190-200ish looks like i will be doing a leak down test and if that checks out fine i will double check my timing gears
rings r shot the motor looses 100psi in 15 seconds. took the rockers of so i put the valve covers back on and so the filler neck whould be th eonly place for the air to go it builds enought presure to wana blow ur hand off it if u hold it over it..... Second motor from HK that has had problem i will be shoping else where now
Yeah thats it.... not likely. ABout as likely as the last motor you had from him failing after "just being ran on the motor" but the ring lands had more waves than a hawaii beach. Weve hit his motors with a 300+ shot on nitrous and pistons tops looks brand new.
Any chance it was ranthat rich and washed the cyl down... like if the valves were too tight and hanging somethign open and a cyl wasnt popping off right?
Any chance it was ranthat rich and washed the cyl down... like if the valves were too tight and hanging somethign open and a cyl wasnt popping off right?
Originally Posted by GrannySShifting
Yeah thats it.... not likely. ABout as likely as the last motor you had from him failing after "just being ran on the motor" but the ring lands had more waves than a hawaii beach. Weve hit his motors with a 300+ shot on nitrous and pistons tops looks brand new.
Any chance it was ranthat rich and washed the cyl down... like if the valves were too tight and hanging somethign open and a cyl wasnt popping off right?
Any chance it was ranthat rich and washed the cyl down... like if the valves were too tight and hanging somethign open and a cyl wasnt popping off right?
why not just have that motor re-ring'd and run it, at least for this year? It's a good piece with the heads and all that you have going on with it..... be a hell of alot cheaper, and would let ya get back to racing somewhat quickly.
Give ken a call, see what he says..... Id' do that before going crazy spending 20 grand.
Give ken a call, see what he says..... Id' do that before going crazy spending 20 grand.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
FormerVendor
Joined: Nov 2001
Posts: 3,065
Likes: 6
From: Houston, Tx.
Charlie, You melted down your first set of pistons and knocked off half the moly of the top rings. The engine was SEVERELY detonated and most of the pistons burned up, melted. Brian at Wiseco also saw them and what happened. They looked worse than the same pistons (K394A3) that people here on LS1Tech run 300 shots on. These same pistons after leaning out or detonating real bad still don't even usually have that much damage and yet this was on an NA engine supposedly. There was molten aluminum at the tops of most of the bores that we had to rehone to even put the new pistons in. We have never seen an NA engine even do that to tell you the truth and neither had anyone else I forwarded your piston pics to. They all assumed a massive lean out, excessive timing or NOS usage and failure.
Now on your current setup I have no idea what it wrong as I only sold you some parts and other people put it all together and set it up and tuned it but it might be something simple so look at that first like these guys are telling you. I never received your dyno sheet on the fax but seeing it now in this thread it's hard to tell much with the big converter and T400 as the results are always kind of scewed and weird to look at on automatic dyno sheets without locked converters. I would look for signs of valve float or fuel shortage etc. but you don't exactly crash anywhere on your sheet up there. We do the same sort of things down here with no problems but again I am not there to really know what is going on.
Now on your current setup I have no idea what it wrong as I only sold you some parts and other people put it all together and set it up and tuned it but it might be something simple so look at that first like these guys are telling you. I never received your dyno sheet on the fax but seeing it now in this thread it's hard to tell much with the big converter and T400 as the results are always kind of scewed and weird to look at on automatic dyno sheets without locked converters. I would look for signs of valve float or fuel shortage etc. but you don't exactly crash anywhere on your sheet up there. We do the same sort of things down here with no problems but again I am not there to really know what is going on.
FormerVendor
Joined: Nov 2001
Posts: 3,065
Likes: 6
From: Houston, Tx.
Originally Posted by 1984camaroz28
rings r shot the motor looses 100psi in 15 seconds. took the rockers of so i put the valve covers back on and so the filler neck whould be th eonly place for the air to go it builds enought presure to wana blow ur hand off it if u hold it over it..... Second motor from HK that has had problem i will be shoping else where now
You have ring gaps. Your cylinders won't "hold pressure" for 15 seconds! They immediately leak which is why you have to have air pressure to even do a leakdown test. There's nothing wrong with your rings unless you've fried something which hopefully hasn't already happened again. Was it tuned at the same place again that fried your original pistons?
After doing literally hundreds of these engines you are sure having lot's of problems. You may simply not be making big power with that intake as well. I have not personally used that manifold but of course we all know the ET heads can make big power even well into the 7xx RWHP range NA. If that intake is unported or has a restrictive elbow etc. who knows? Are you even getting full KPA etc?
I do engines for over 8 shops here on LS1Tech and yet don't seem to have these situations really ever and when I say that I am talking from really big power adders to small heads / cam 347s. Pistons and rings just don't "go bad" from what I've seen over the years.
FormerVendor
Joined: Nov 2001
Posts: 3,065
Likes: 6
From: Houston, Tx.
I think the power you are looking for is probably elsewhere Charlie. Where is the cam in the motor as far as ICL?
I have to go out now but I would check that first if you pnly had 150 PSI cranking pressure.
I have to go out now but I would check that first if you pnly had 150 PSI cranking pressure.
Motors probably fine. Too much converter. Soakin up the HP on the dyno, makin it look like its nosin over.
You said the trap speed was 129. what was the RPMs thru the traps?
Also, you're not doin the leakdown test correctly. You have to use the proper tool, a dual gauge setup. Set the one gauge at 100 psi even, with it hooked up to the cylinder. The other gauge will show you the percentage of leakdown.
Data log it on the dyno, to make sure it doesnt build vacuum at the end of the pull, which would indicate an intake restriction. The MAP should stay right at 100 kpa or very near.
You said the trap speed was 129. what was the RPMs thru the traps?
Also, you're not doin the leakdown test correctly. You have to use the proper tool, a dual gauge setup. Set the one gauge at 100 psi even, with it hooked up to the cylinder. The other gauge will show you the percentage of leakdown.
Data log it on the dyno, to make sure it doesnt build vacuum at the end of the pull, which would indicate an intake restriction. The MAP should stay right at 100 kpa or very near.
Originally Posted by 1984camaroz28
7k im trapin the car shouldent fall off on power at 6600rpms tho....
You cant lock it, so you've still got all that slop in the high rpms.