Exhuast testing Round 2 - HKS vs Buschur
Feb 21, 2007, 12:22 PM
#91
The Greddy Ti and ours have been tested against each other already. They made .7 of a whp more than we did and we made 1.3 ft lbs of torque more than they did. I'd call it a tie. So now you have to decide if the huge price difference is worth the weight savings of I think 7 pounds. (My memory might be wrong on that weight but I think it's right)
Also, remember this test was on a fairly weak car. Add 100 whp to that car and then the difference in HP will go up, gaurantee it.
Also, remember this test was on a fairly weak car. Add 100 whp to that car and then the difference in HP will go up, gaurantee it.
Feb 21, 2007, 12:46 PM
#92
The Greddy Ti and ours have been tested against each other already. They made .7 of a whp more than we did and we made 1.3 ft lbs of torque more than they did. I'd call it a tie. So now you have to decide if the huge price difference is worth the weight savings of I think 7 pounds. (My memory might be wrong on that weight but I think it's right)
Also, remember this test was on a fairly weak car. Add 100 whp to that car and then the difference in HP will go up, gaurantee it.
Also, remember this test was on a fairly weak car. Add 100 whp to that car and then the difference in HP will go up, gaurantee it.
Feb 21, 2007, 01:00 PM
#93
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When you have mildy modifed Stage I stock turbo cars - changing an exhuast may not have as much as a dramatic effect as on more modied cars with say Stage III or IV mods with cams or a larger turbo where a restrictive exhuast will cost you more and more power
A turbo system is like a chain - its only as strong as its weakest link
The more power you make - the more a weak link will hold you back
The gains achived in this test IMHO are impressive considering the mildly modified nature of the car - e.g. - stock air box
A turbo system is like a chain - its only as strong as its weakest link
The more power you make - the more a weak link will hold you back
The gains achived in this test IMHO are impressive considering the mildly modified nature of the car - e.g. - stock air box
Feb 21, 2007, 10:23 PM
#96
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why not just swap the exhaust and re dyno, then there is no "oh you tuned it" crap. you also get to see exactly what the other effects of the swap are be it running leaning, more knock, less timing. the average person is not going to have their car tuned every time they ad a mod or change one thing. IMO it makes for more accurate testing as to what the "real world" gains would be. also alot of people on this site do not run a 35r or anything but a stock turbo so why go through the trouble of using a highly modified car when no one cares what it would make. they want to know what it would make on a car similar to thiers. although i understand you test on what you can get. i just think it would be better to take a car with Buschur exhaust and replace it with the other guys then just let er rip. you would get a more complete look at what the exhaust does for the car.
nate
nate
Feb 21, 2007, 10:46 PM
#97
No doubt that HKS is a very good product
Anyone who lumps HKS in the Ebay catagory is seriusly mistaken
HKS has an entire testing and R & D facility in which they make their stuff
This is why I always recomend HKS cams
You do get what you pay for when you buy HKS
But - remember - the Buschur unit made more power and weighs much less and costs significantly less
Anyone who lumps HKS in the Ebay catagory is seriusly mistaken
HKS has an entire testing and R & D facility in which they make their stuff
This is why I always recomend HKS cams
You do get what you pay for when you buy HKS
But - remember - the Buschur unit made more power and weighs much less and costs significantly less
Weren't you the same guy that said this about the HKS exhaust.
Feb 21, 2007, 10:57 PM
#99
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However - it did make less power than the Buschur so its not "all that" if you get my drift ?
Feb 21, 2007, 10:58 PM
#100
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why not just swap the exhaust and re dyno, then there is no "oh you tuned it" crap. you also get to see exactly what the other effects of the swap are be it running leaning, more knock, less timing. the average person is not going to have their car tuned every time they ad a mod or change one thing. IMO it makes for more accurate testing as to what the "real world" gains would be. also alot of people on this site do not run a 35r or anything but a stock turbo so why go through the trouble of using a highly modified car when no one cares what it would make. they want to know what it would make on a car similar to thiers. although i understand you test on what you can get. i just think it would be better to take a car with Buschur exhaust and replace it with the other guys then just let er rip. you would get a more complete look at what the exhaust does for the car.
nate
nate
Just my idea
Maybe next time I will try it your way
Anyway I do it - someone will complain - they always do
Feb 21, 2007, 11:02 PM
#101
Besides the test pipe differences the only real missing data from Al's post would be the calculated error. Since he ran so many tests it should be pretty easy to get a finite difference in hp between runs on the same exhaust and calculate the mean.
If he had a calculated error of say 10hp and the total hp gained on system A vs B was 15hp then you can establish that A will yield about 5hp.
Note:
I DO NOT expect Al to give me Lab Grade results after all its his time and effort. I appreciate his work.
Feb 22, 2007, 04:26 AM
#102
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^^I agree. A car can make 3-9 whp difference between pulls with no changes to it. I would say this is a good test. And as far as retuning, well you have to make the necessary adjustments for a part to work whether it is an exhaust or whatever. I think if you look at the two exhausts side by side and look at the numbers you can see everything looks in order. IMO that is.
Feb 22, 2007, 04:45 AM
#103
