Farnbacher Loles Power Plus > X51
03-27-2008, 07:04 PM
#16
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What about the rest of the X51 intake and larger exhaust valves that are in the factory cars? The intake is to allow more air in as a complete unit with air filter housing and the exhaust valves with headers will allow the effluent.
03-27-2008, 07:28 PM
#17
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To my knowledge the X51 kit includes the twin snorkel carbon fiber air box with two air filters, larger diameter sand cast intake with a different plenum and larger throttle bodies, the cylinder heads are flowed, stiffer exhaust valve springs, X51 headers mated to a sport exhaust and a modified ECU.
You are correct that the goal was to allow for more air to flow through the engine to facilitate in producing more power.
03-27-2008, 10:30 PM
#18
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Awilks,
Those are very impressive results. I'm curious what correction factor was used to arrive at the horsepower and torque figures. Or, was the engine removed and run on an engine dyno?
I posted my dyno runs a while back. They were performed on an DynaPack 3000 chasis dyno that bolts to the rear hubs (as opposed to the rolling drum type dynos). The results at the rear wheels were 337hp and 287tq. Using the generally accepted 15% drivetrain loss correction factor, that suggests 396hp and 337tq at the crankshaft.
If the mods to your car are limited to X51 airbox, ECU reflash, full exhaust system and 200cel cats, that's all the more impressive. Does FL have X51 dyno sheets to compare with yours? That would be very interesting. I'd also like to know what they could do with an X51 engine. I'll bet they have data already on X51 with cats and a reflash.
MC
Those are very impressive results. I'm curious what correction factor was used to arrive at the horsepower and torque figures. Or, was the engine removed and run on an engine dyno?
I posted my dyno runs a while back. They were performed on an DynaPack 3000 chasis dyno that bolts to the rear hubs (as opposed to the rolling drum type dynos). The results at the rear wheels were 337hp and 287tq. Using the generally accepted 15% drivetrain loss correction factor, that suggests 396hp and 337tq at the crankshaft.
If the mods to your car are limited to X51 airbox, ECU reflash, full exhaust system and 200cel cats, that's all the more impressive. Does FL have X51 dyno sheets to compare with yours? That would be very interesting. I'd also like to know what they could do with an X51 engine. I'll bet they have data already on X51 with cats and a reflash.
MC
03-27-2008, 10:39 PM
#19
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I don't think there are any differences in exhaust valve size; just a bit stiffer exhaust valve springs to safely allow for a slightly higher rpm.
To my knowledge the X51 kit includes the twin snorkel carbon fiber air box with two air filters, larger diameter sand cast intake with a different plenum and larger throttle bodies, the cylinder heads are flowed, stiffer exhaust valve springs, X51 headers mated to a sport exhaust and a modified ECU.
You are correct that the goal was to allow for more air to flow through the engine to facilitate in producing more power.
To my knowledge the X51 kit includes the twin snorkel carbon fiber air box with two air filters, larger diameter sand cast intake with a different plenum and larger throttle bodies, the cylinder heads are flowed, stiffer exhaust valve springs, X51 headers mated to a sport exhaust and a modified ECU.
You are correct that the goal was to allow for more air to flow through the engine to facilitate in producing more power.
The exhaust valves though are a larger size for the X51 to allow for the additional flow. The springs are the same on the 3.8S and the X51 though.
03-27-2008, 10:47 PM
#20
I don't believe you are correct about the larger exhaust valves. If you are, I don't know how you would buy replacements if needed because there is not a separate part number for an X-51 ex valve listed un the parts book.
People have insisted there are different exhaust springs too. Again no part#.
I personnally think the heads are just ported and polished. But I honestly haven't sen the two different heads to compare. I am just going by the online parts book.
People have insisted there are different exhaust springs too. Again no part#.
I personnally think the heads are just ported and polished. But I honestly haven't sen the two different heads to compare. I am just going by the online parts book.
03-27-2008, 10:56 PM
#21
Three Wheelin'
I don't believe you are correct about the larger exhaust valves. If you are, I don't know how you would buy replacements if needed because there is not a separate part number for an X-51 ex valve listed un the parts book.
People have insisted there are different exhaust springs too. Again no part#.
I personnally think the heads are just ported and polished. But I honestly haven't sen the two different heads to compare. I am just going by the online parts book.
People have insisted there are different exhaust springs too. Again no part#.
I personnally think the heads are just ported and polished. But I honestly haven't sen the two different heads to compare. I am just going by the online parts book.
03-27-2008, 11:14 PM
#22
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I don't believe you are correct about the larger exhaust valves. If you are, I don't know how you would buy replacements if needed because there is not a separate part number for an X-51 ex valve listed un the parts book.
People have insisted there are different exhaust springs too. Again no part#.
I personnally think the heads are just ported and polished. But I honestly haven't sen the two different heads to compare. I am just going by the online parts book.
People have insisted there are different exhaust springs too. Again no part#.
I personnally think the heads are just ported and polished. But I honestly haven't sen the two different heads to compare. I am just going by the online parts book.
we seem to cross paths very often. The last time I checked I was the expert in the field.Stock Exhaust valve: 996 105 273 03
X51 Valve: 997 105 112 40
Any other questions?
03-27-2008, 11:42 PM
#24
Race Director
marine8541...thanks for clearing that up...I have always wondered myself. take care, Mike
are you going to the St. Petersburg ALMS/Indy race?
are you going to the St. Petersburg ALMS/Indy race?
03-28-2008, 12:36 AM
#27
Race Director
Yeah...I did not know if you went to the races in person or they just sent you the info in CT.
03-28-2008, 09:22 AM
#28
I stand corrected first I heard of a larger ex valve.
03-28-2008, 11:02 AM
#29
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Andy.. we should definitely meet up. It was my car you test drove before buying your current ride. Now that I have 2,500 miles on maybe the differnece you wanted to feel will be more evident. And if not, c'est la vie.
I am around Sunday afternoon. And the weather looks to want to co operate. Let me know.. PM me if you like.
I am around Sunday afternoon. And the weather looks to want to co operate. Let me know.. PM me if you like.
03-28-2008, 01:03 PM
#30
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Thanks for clearing up the valve spring difference. I would be interested in the actual exhaust valve dimensions however.