B20 vtec turbo dyno problems
#1
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B20 vtec turbo dyno problems
I'll try to keep this intro short. I'm looking for help. My car is running shitty and I didn't finish my dyno tune.
Setup:
Block: b20b,84.5 cast pistons(new), arp rod bolts(new),ge blockguard, everything else stock.
Head:gsr,itr cams,dual valve springs,ugr valves(new),port&polished.
Extras: t3/4 63 trim turbo (new)
Victor x I'm but will be a skunk2 pro series I'm next week
3 inch exhaust
Tune was on chrome.
Ok so here's what happens I bought the car had it about 2 weeks and it started to loose compression and smoke. So I had it rebuilt at a machine shop. New pistons, bearings, rod bolts, valve job, decked the block and bore to 84.5, plus what ever else they do .
I put the block back together drove it to my tuner. Had no real problems on the way. Never took it past 3,500 rpm. So we get on the dyno and it just sounds crazy. It sounds like it has a miss when your in the car but from outside it sounds like it's ready to blow up. There was flames coming out of the wastegate dump tube. The tuner kept trying to fix& tune the car but after about 1hr he threw in the towel and said once it hit vtec it goes crazy. He could not figure out why. So I asked him if he messed with the dizzy he said no and took it from the middle to full retard I think and I gained 25 hp. Then he took a timing light to the car and the gun showed the I was between the 3 marks and the tdc mark. So he told me it must be off a tooth and to bring it back after I fix it. So I took it home and redid my timing. I think it's still in the same spot as before but I followed the directions to a tee.
Also I bought new wires rotor and cap. But the car still does the same thing.
So my questions are
1.what is that noise
2. If I was off by 1 tooth and fixed it would it still do this until I go back to my tuner
3.why the he'll do I get a code 43. It comes and goes ever since I bought my car
4. Will going from victor x to skunk2 pro give me more torque and hp. I'm only Erving to 8k
Setup:
Block: b20b,84.5 cast pistons(new), arp rod bolts(new),ge blockguard, everything else stock.
Head:gsr,itr cams,dual valve springs,ugr valves(new),port&polished.
Extras: t3/4 63 trim turbo (new)
Victor x I'm but will be a skunk2 pro series I'm next week
3 inch exhaust
Tune was on chrome.
Ok so here's what happens I bought the car had it about 2 weeks and it started to loose compression and smoke. So I had it rebuilt at a machine shop. New pistons, bearings, rod bolts, valve job, decked the block and bore to 84.5, plus what ever else they do .
I put the block back together drove it to my tuner. Had no real problems on the way. Never took it past 3,500 rpm. So we get on the dyno and it just sounds crazy. It sounds like it has a miss when your in the car but from outside it sounds like it's ready to blow up. There was flames coming out of the wastegate dump tube. The tuner kept trying to fix& tune the car but after about 1hr he threw in the towel and said once it hit vtec it goes crazy. He could not figure out why. So I asked him if he messed with the dizzy he said no and took it from the middle to full retard I think and I gained 25 hp. Then he took a timing light to the car and the gun showed the I was between the 3 marks and the tdc mark. So he told me it must be off a tooth and to bring it back after I fix it. So I took it home and redid my timing. I think it's still in the same spot as before but I followed the directions to a tee.
Also I bought new wires rotor and cap. But the car still does the same thing.
So my questions are
1.what is that noise
2. If I was off by 1 tooth and fixed it would it still do this until I go back to my tuner
3.why the he'll do I get a code 43. It comes and goes ever since I bought my car
4. Will going from victor x to skunk2 pro give me more torque and hp. I'm only Erving to 8k
Last edited by bigodub93; 09-08-2010 at 07:15 PM.
#2
Honda-Tech Member
Thread Starter
Re: B20 vtec turbo dyno problems
#3
Honda-Tech Member
Thread Starter
Re: B20 vtec turbo dyno problems
a friend also told me to recheck my valve lash. i think if i just did it 40 miles ago it should be fine. plus my compression is pretty much 160 all the way accross.
#5
Honda-Tech Member
Re: B20 vtec turbo dyno problems
you're on the right track, i'd guess valves are not adjusted right and/or you're timing is way off. If he adjusted the timing and it had an impact i'd start there. Maybe have someone who really knows honda's double check your timing and valve lash?
#7
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Re: B20 vtec turbo dyno problems
Its hard to tell but in the video and judging by the rpm it only makes a noise when in Vtec. My first suggestion is to check the LMA's in the valve train. also check oil pressure at Vtec switch.
definately sounds like valves or pat of the valve train.
definately sounds like valves or pat of the valve train.
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#12
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Re: B20 vtec turbo dyno problems
i had a similar problem with my car asked all kinds of questions about why i made no power and got no answers so ill tell you this
my problem was my cams were out of degree from the amount of material taken off the head and they are stock gsr cams
my exhaust was out 17 deg (retarded)
and my intake was out by 7 deg
once this was found it was re-set correctly and i jumped 180hp ( no joke)
my symptons were
lack of power
running really hot
car seemed to fall off power at higher RPM
torque dropped 40trq after 5500RPM
my problem was my cams were out of degree from the amount of material taken off the head and they are stock gsr cams
my exhaust was out 17 deg (retarded)
and my intake was out by 7 deg
once this was found it was re-set correctly and i jumped 180hp ( no joke)
my symptons were
lack of power
running really hot
car seemed to fall off power at higher RPM
torque dropped 40trq after 5500RPM
#14
Honda-Tech Member
Thread Starter
Re: B20 vtec turbo dyno problems
Ya now I have to look up diagrams on the complete head assy. I was also told maybe the machine shop didn't lock my loggers for vtec. ( don't know how to say it). He told me to take plug out on the front of the head where vtec oil goes and blow air thru there with my compressor and see if all the lodgers lock into place.
#15
Honda-Tech Member
Thread Starter
Re: B20 vtec turbo dyno problems
i had a similar problem with my car asked all kinds of questions about why i made no power and got no answers so ill tell you this
my problem was my cams were out of degree from the amount of material taken off the head and they are stock gsr cams
my exhaust was out 17 deg (retarded)
and my intake was out by 7 deg
once this was found it was re-set correctly and i jumped 180hp ( no joke)
my symptons were
lack of power
running really hot
car seemed to fall off power at higher RPM
torque dropped 40trq after 5500RPM
my problem was my cams were out of degree from the amount of material taken off the head and they are stock gsr cams
my exhaust was out 17 deg (retarded)
and my intake was out by 7 deg
once this was found it was re-set correctly and i jumped 180hp ( no joke)
my symptons were
lack of power
running really hot
car seemed to fall off power at higher RPM
torque dropped 40trq after 5500RPM
#16
Honda-Tech Member
Thread Starter
#17
Honda-Tech Member
Thread Starter
Re: B20 vtec turbo dyno problems
Ok I was reading up on changing the lma's. Now don't those keep constant pressure on the rockers? If so what actually only moves when vtec is activated. I want to also clean and inspect those parts.
#18
Honda-Tech Member
Thread Starter
Re: B20 vtec turbo dyno problems
Ok so my first day off and I tried to do everything I could to fix the problem. Last week before I started this thread I reset my timing by using the pulley marks and was pretty sure it was dead on. Well today I went further and took off the pulley and lined up the sprocket to the oil pump mark. From the looks of it I was a full tooth off. And now there is less slack in my belt also. I also took out the loss motion assy. Everything seemed to look fine. I also pushed all the little lockers on the vtec rocker and they all moved smooth. Then I did another valve adjustment. Only about 5 were off so I took care of those. I also put on the skunk2 intake manifold. With a b20 throttle body.
Now here's where the problems start. The intake manifold is longer than the victor x so now my charge piping doesn't fit. And the throttle cable is way too long to fit the throttle body. It wants to wrap around 2x but it just doesn't work out.
So now I'm ready to start my car and see if the problem is fixed but I need help with the throttle cable situation. I guess I can drive it to the muffler shop to get a new charge pipe made, but that will be on hold until the cable is worked out.
Now here's where the problems start. The intake manifold is longer than the victor x so now my charge piping doesn't fit. And the throttle cable is way too long to fit the throttle body. It wants to wrap around 2x but it just doesn't work out.
So now I'm ready to start my car and see if the problem is fixed but I need help with the throttle cable situation. I guess I can drive it to the muffler shop to get a new charge pipe made, but that will be on hold until the cable is worked out.
#21
Honda-Tech Member
Re: B20 vtec turbo dyno problems
If you where off a tooth than that was the problem. I Put a swap in a boys car
idled good but ran like **** would barely pull out of the driveway. I hooked up a timing light and relized something was not right. I then checked the timing belt and it was off a tooth. He later told me him and his dad put on a new timing belt before they brought the engine to the shop
idled good but ran like **** would barely pull out of the driveway. I hooked up a timing light and relized something was not right. I then checked the timing belt and it was off a tooth. He later told me him and his dad put on a new timing belt before they brought the engine to the shop
#22
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Thread Starter
#23
Honda-Tech Member
Thread Starter
Re: B20 vtec turbo dyno problems
If you where off a tooth than that was the problem. I Put a swap in a boys car
idled good but ran like **** would barely pull out of the driveway. I hooked up a timing light and relized something was not right. I then checked the timing belt and it was off a tooth. He later told me him and his dad put on a new timing belt before they brought the engine to the shop
idled good but ran like **** would barely pull out of the driveway. I hooked up a timing light and relized something was not right. I then checked the timing belt and it was off a tooth. He later told me him and his dad put on a new timing belt before they brought the engine to the shop
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