My first Apten dyno...disappointed :(
Originally posted by Big Man
This sucks, Im missing out on the fun.
I need a new credit card.
This sucks, Im missing out on the fun.
I need a new credit card.
Shane
Originally posted by ShaneMcKenna203
hah, funny you should mention that, I just got another credit card in the mail yesterday. I could have some fun with these. I just think the fun wouldnt last much longer after the statement came.
Shane
hah, funny you should mention that, I just got another credit card in the mail yesterday. I could have some fun with these. I just think the fun wouldnt last much longer after the statement came.
Shane
I have some information I would like to discuss with you regarding a possible reason your gains could be less than others but you have your email blocked, please email me so we can discuss some findings Ive seen.
Originally posted by BigFan
I have some information I would like to discuss with you regarding a possible reason your gains could be less than others but you have your email blocked, please email me so we can discuss some findings Ive seen.
I have some information I would like to discuss with you regarding a possible reason your gains could be less than others but you have your email blocked, please email me so we can discuss some findings Ive seen.
Originally posted by Rob_02Lightning
. . . Sorry you feel cheated but the Diff is in the RICHER TUNE
and you should thank your lucky stars for it. With A/F's in the mid 12's it was only a matter of time before it threw a Rod. . .
. . . Sorry you feel cheated but the Diff is in the RICHER TUNE
and you should thank your lucky stars for it. With A/F's in the mid 12's it was only a matter of time before it threw a Rod. . .
Originally posted by Nathan
The Apten's increased thermal efficiency is conducive to high boost. . .
Just a thought, but maybe people are breaking rods from too much timing. Could it be that high boost, and advanced timing is side-loading the rods somewhat? or that too much advance (even with safe fuel) is increasing stress on the piston by ramping up combustion too close to TDC and putting excessive stress on the rods causing them to deflect rather than spin the crank as intended? I'm really surprised that with all these rod failures we arent hearing about bearings at all...
The Apten's increased thermal efficiency is conducive to high boost. . .
Just a thought, but maybe people are breaking rods from too much timing. Could it be that high boost, and advanced timing is side-loading the rods somewhat? or that too much advance (even with safe fuel) is increasing stress on the piston by ramping up combustion too close to TDC and putting excessive stress on the rods causing them to deflect rather than spin the crank as intended? I'm really surprised that with all these rod failures we arent hearing about bearings at all...
As to the rod issue, it is definitely detonation. You can search my previous posts, but it's easy to explain. Even massive amounts of boost will not create excessive loads on the rods on the power stroke -- IFF there is no detonation. The loads on a rod are greatest as the rod makes the downturn from TDC and wants to pull itself apart. Way greater than compressive loads from combustion. And it goes up exponentially with RPMs (remember that when you have your tuner up the rev limiter).
If you add the slightest combustion anomaly, however, the whole thing goes out the window. Even mild detonation (which may be completely inaudible on a SC engine) causes compressive loads an order of magnitude greater than those produced by the force of the normal explosion from even huge amounts of boost.
I have no idea why this is not better understood.
Originally posted by Tim Skelton
Please show me data showing better thermal efficiency from the ported blower. I ain't sayin' that it's not so, but after spending some time over the past month collecting supercharger efficiency data, I can tell you that it's not easy. I would be surprised if anyone has actually done it.
As to the rod issue, it is definitely detonation. You can search my previous posts, but it's easy to explain. Even massive amounts of boost will not create excessive loads on the rods on the power stroke -- IFF there is no detonation. The loads on a rod are greatest as the rod makes the downturn from TDC and wants to pull itself apart. Way greater than compressive loads from combustion. And it goes up exponentially with RPMs (remember that when you have your tuner up the rev limiter).
If you add the slightest combustion anomaly, however, the whole thing goes out the window. Even mild detonation (which may be completely inaudible on a SC engine) causes compressive loads an order of magnitude greater than those produced by the force of the normal explosion from even huge amounts of boost.
I have no idea why this is not better understood.
Please show me data showing better thermal efficiency from the ported blower. I ain't sayin' that it's not so, but after spending some time over the past month collecting supercharger efficiency data, I can tell you that it's not easy. I would be surprised if anyone has actually done it.
As to the rod issue, it is definitely detonation. You can search my previous posts, but it's easy to explain. Even massive amounts of boost will not create excessive loads on the rods on the power stroke -- IFF there is no detonation. The loads on a rod are greatest as the rod makes the downturn from TDC and wants to pull itself apart. Way greater than compressive loads from combustion. And it goes up exponentially with RPMs (remember that when you have your tuner up the rev limiter).
If you add the slightest combustion anomaly, however, the whole thing goes out the window. Even mild detonation (which may be completely inaudible on a SC engine) causes compressive loads an order of magnitude greater than those produced by the force of the normal explosion from even huge amounts of boost.
I have no idea why this is not better understood.
Tim,
I would have trouble even telling you what most of those words even mean
.I am thinking of the Apten porting this way. I can make more boost, and spin the rotors less...thus creating less heat.
Is there any significance in this line of thought?
Heck...I know this much....my truck runs quicker...even with a smaller diameter lower pulley.
Thanks for an help here Tim.
Rocks
Originally posted by Tim Skelton
As to the rod issue, it is definitely detonation. You can search my previous posts, but it's easy to explain. Even massive amounts of boost will not create excessive loads on the rods on the power stroke -- IFF there is no detonation. The loads on a rod are greatest as the rod makes the downturn from TDC and wants to pull itself apart. Way greater than compressive loads from combustion. And it goes up exponentially with RPMs (remember that when you have your tuner up the rev limiter).
If you add the slightest combustion anomaly, however, the whole thing goes out the window. Even mild detonation (which may be completely inaudible on a SC engine) causes compressive loads an order of magnitude greater than those produced by the force of the normal explosion from even huge amounts of boost.
I have no idea why this is not better understood.
As to the rod issue, it is definitely detonation. You can search my previous posts, but it's easy to explain. Even massive amounts of boost will not create excessive loads on the rods on the power stroke -- IFF there is no detonation. The loads on a rod are greatest as the rod makes the downturn from TDC and wants to pull itself apart. Way greater than compressive loads from combustion. And it goes up exponentially with RPMs (remember that when you have your tuner up the rev limiter).
If you add the slightest combustion anomaly, however, the whole thing goes out the window. Even mild detonation (which may be completely inaudible on a SC engine) causes compressive loads an order of magnitude greater than those produced by the force of the normal explosion from even huge amounts of boost.
I have no idea why this is not better understood.
I don't know how many times I have seen people post this and yet still 90% of the people have no clue. The rods are the weakest link in the motor but they are NOT weak!!
If you don't run your motor lean and keep the timing conservative enough to not detonate you will never blow up a motor at the power levels most of us are running.
Pump gas is pure crap, its almost worthless for forced induction applications and people keep trying to run monster boost and lean curves and wonder why things blow up.
My other 2 cars have a way to monitor detonation and the computer pulls out timing when it "hears" it. I can't even begin to hear detonation on those cars until the computer is already pulling 14-15 degrees out.
Its scary when people say they can HEAR detonation.. Man thats BAD. That will kill a motor faster than anything else you can do.
The trick is a SAFE pumpgas tune and race with good octane!!
Bah nobody listens anways...



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