Dude. Its pretty simple really. There is NO restriction to a 2" system up to some stupid PSI right? The outcome is fairly predictable. So, why would you bother with the amount of work required to fit up a full pressure pipe system when you KNOW the results will be the same? That does not make any economic sense at all given that he had to pay for dyno time. THAT is the very reason why he didnt do it. Back to back testing on the turbo intake side will make a hell of lot more sense and i would expect some significant differences there. As a matter of interest, a single 44mm TB supports in excess of 400Hp. 50mm TB's are something to make you feel good. L8r E
I expected some negative feedback based on calling an end to the comparison after the test results were obtained on the stock pipes but at the end of the day what was done clearly shows enough. For the 2.5" boost pipe kits to achieve anything there must first be a significant restriction and the test results show very clearly there simply isn't. As explained earlier even if you had a miracle zero loss system you STILL will not gain what some people will tell you. I expected people to be unhappy and I suggest those people spend the time and the money to carry out the comparison for themselves if they feel I was wrong to stop when I did. And if those people could post the results that would be great The 2.5" boost pipes have been sold with the promise of more air flow etc, the stock pipes flow just fine in this instance at least - there simply isn't the room for improvement to create the benefits people have claimed - it was simply not worth bothering to hook the pipes up. There is a point where a bigger pipe simply will NOT produce any more flow because the pump feeding it and the unit at the other end simply do not need any more flow.
problems with reading just the results I see what your saying now - Oops - I missed the throttle bodies Perhaps he will try again without the bottlenecks? Good info on the fuel pump though
YIP!! I said to the tuner today "the only reason those TBs are there is because they are shiny and look cool! the stock TBs look like ass IMO" :rofl: Agree with the rest of your post also!
As I see it the test, which for me while not indepth is still a reasonable take on this system, with 2" pipework shows that the difference is too small to get a genuine comparable reading to make a comparrison viable. Maybe with a lot bigger engine again the restriction of a 2" system would show a larger drop in pressure. Although this engine is more than a lot of us are running now. As far as changing throttle boddies and other components or tune then you are adding another variable to effect HP output. that is not a fair test when comparing 2 items side by side. I think the method used here was fair but I also think if he was able the second run of test should of been done to show that both systems were showing a similar pressure drop. More import though I feel that response time and lag may have been effected more than manifold pressure on the dyno readouts with the larger pipework.
because he didn't do it the debate continues your theory is great and so is everyone elses .... there is a practical test that has been done back to back and until someone else does a proper test to prove it wrong IT STANDS STRONG ! later
tassuperkart - As a matter of interest, a single 44mm TB supports in excess of 400Hp. 50mm TB's are something to make you feel good Wow - didnt know that ! - Learn something new everyday!
BB, he DOESNT HAVE to. What part of this are you trying so hard NOT to see????? Oh never mind, here I copied it for you. Read this AGAIN and pay close attention to the pressure drop figures from lower to higher boost (and therefore FLOW) There ya go bud. What do you see? Ohhh... wait... do you see a LOWER pressure drop at HIGHER boost?? YES YOU DO!!!!! Isnt that enough???? 2" pipe is NO restriction at all at stupid horsepower. LATER E
You just taught me there is none! LOL Appreciate that little important piece of information - valuable info
im not getting into a debate about fuel pumps. could there be something wrong with your pump mugs? your numbers dont mean all stock tt pumps will do the same , for the record ive seen stock tt pump run up to 418rwkw with not much pressure drop . i run a nismo pump and did 360 rwkw at low boost ( 18psi ) . just my 2 cen
While you all keep arguing - I'll keep learning here! This post is turning out to be one of the best informative posts I have come across at this forum! So dont stop - who turn is it next - as I am eager for my next learning curve
Whats the story with the pump ? I'm interested in average stock figures 355rwkw vs 418rwkw? Which ones right - anyone?
Fuel pump is about 13000kms old, will do some tests on voltage drops etc but at the end of the day it's a long way short of doing the job safely so needs friend to help it out. Surge tank on the way one day, talked about it before but this just brings the day forward a little
