Built Single cam Power Loss after 6K
#1
Thread Starter
iTrader: (2)
Built Single cam Power Loss after 6K
ok, this is a really long story turned short for interest of time.
I have a built Y7 block with Y8 head. Already dynoed and ran it at the track and it ran perfect. I forget exactly what I changed, but just one day the car has nothing above 6000 RPM, so I took out the zex cam and threw the stock Y8 back in. Still no power above 6K. It feels like it misses a little bit. It is more evident at 10 psi then 15psi. I also gave the car lots of timing, then took lots away, to no avail. I adjusted cam gear settings. I have redone my timing belt about 5 times. Change distributor, plug wires, map sensor and timing maps. I can't figure out what the hell is going on with this thing.
With the Y8 cam and the Z6 cam gera, I advanced it to 4.5 degrees when I put both cams in. It ran fine, untill one day, this all started happening, after I redid my intercooler piping and fixed my wastegate. Any ideas would be helpful.
Also compression check yields 150 on all cylinders. WOT, engine hot.
I have a built Y7 block with Y8 head. Already dynoed and ran it at the track and it ran perfect. I forget exactly what I changed, but just one day the car has nothing above 6000 RPM, so I took out the zex cam and threw the stock Y8 back in. Still no power above 6K. It feels like it misses a little bit. It is more evident at 10 psi then 15psi. I also gave the car lots of timing, then took lots away, to no avail. I adjusted cam gear settings. I have redone my timing belt about 5 times. Change distributor, plug wires, map sensor and timing maps. I can't figure out what the hell is going on with this thing.
With the Y8 cam and the Z6 cam gera, I advanced it to 4.5 degrees when I put both cams in. It ran fine, untill one day, this all started happening, after I redid my intercooler piping and fixed my wastegate. Any ideas would be helpful.
Also compression check yields 150 on all cylinders. WOT, engine hot.
#7
Thread Starter
iTrader: (2)
I already put in a new dizzy, map sensor, plugs and wires. So that is covered. I am a dumbass, it is kinda hard to watch the boost gauge and the road and the wideband and RPMs, but I know my problem now. I go to 10, my low boost, and the bastard drops right off to 5. The only thing I changed was an HKS bov, instead of my DSM. I am going to throw the DSM back on and redo ALL of my vacuum lines.
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#8
Thread Starter
iTrader: (2)
Can any one offer some advice. I re did my timing belt today, timed the motor, changed dizzies again, wires, plugs, and tuned it. The car feels like it might be lossing fuel in one cylinder. So I am going to change the fuel filter tomorrrow, and then pop in a new set of injectors. That is all I can think of. The wideband still says it is rich, but honestly timing has been covered completely, it isn't timing related, as I first thought.
#10
Honda-Tech Member
Re: (93turbo16)
Is that a vtec head? Those symptoms sound exactly like a vtec not kicking in. The motor is tuned for the vtec profile and becomes fat and lazy with no vtec. On the dyno a 600whp motor will become a 300whp motor. When this happens, it will not show up fat on an a/f guage either.
#12
Thread Starter
iTrader: (2)
I can atleast say that I have a vtec light hooked up, single cam kinda needs that, and you can hear it engaging. I thought that as well. When I had the cam out, and the rocker assembly apart. Some of the lost motion assembly pieces fell down. I put them back in, and figured it was ok.
#16
Thread Starter
iTrader: (2)
Well my lost motion assemblies seem to be rather tight. I am not sure if that is the cause of my loss of power though. They all fell out at one time, and running them when they weren't in properly could have caused something to warp or something? I am just running out of ideas here.
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