Performance of 60 / 70 mm TP's and HFC's
#21
Former Sponsor
Thread Starter
Originally Posted by takchi,Jan 25 2011, 04:58 PM
Edit: What about 70mm HFC with stock exhaust?
#22
Former Sponsor
Thread Starter
Originally Posted by Ap2batman,Jan 25 2011, 04:45 PM
would a 70 hfc or 70 test pipe matched up with 70mm ehxaust without tune show any gains with stock header?
#24
Registered User
Originally Posted by gernby,Jan 26 2011, 06:59 AM
If you don't have a way to lower VTEC, then I honestly believe it would be hard to justify a Test Pipe. The performance benefit is so small with the stock tune that it just doesn't seem worth the risk of getting caught, the soot buildup on the back of your car, the bad smell, and environmental "damage".
Thanks!! Really good information here!!!!
EDIT: I see from your most recent post that the gains from the TP and Exhaust with stock header and stock tune was still a decent improvement over stock cat and exhaust with stock header and stock tune. Granted, the tuned version is great, but it would appear that the TP and exhaust on stock tune will provide benefits (around 5hp at 7k rpms, not bad for a $70 part).
#25
Former Sponsor
Thread Starter
Originally Posted by Reckon,Jan 26 2011, 12:05 PM
Hmmm...good point. I'll see if there is a tuner nearby, checking with my local forum. Would it be as difficult to jusify the purchase of a header as well, if no tune is available? I have an 05 so my options are limited in that aspect.
Thanks!! Really good information here!!!!
EDIT: I see from your most recent post that the gains from the TP and Exhaust with stock header and stock tune was still a decent improvement over stock cat and exhaust with stock header and stock tune. Granted, the tuned version is great, but it would appear that the TP and exhaust on stock tune will provide benefits (around 5hp at 7k rpms, not bad for a $70 part).
Thanks!! Really good information here!!!!
EDIT: I see from your most recent post that the gains from the TP and Exhaust with stock header and stock tune was still a decent improvement over stock cat and exhaust with stock header and stock tune. Granted, the tuned version is great, but it would appear that the TP and exhaust on stock tune will provide benefits (around 5hp at 7k rpms, not bad for a $70 part).
#26
Former Sponsor
Thread Starter
Okay, so I was wrong about the gains from the 60mm TP being as significant on the stock tune. Here is a plot similar to the one I posted above, but with the stock exhaust and 60mm test pipe. The blue line is stock tune with stock catalytic converter and stock exhaust. The red plot is with a decent tune that wasn't quite "done" with a 60mm TP and stock exhaust. The green plot is the stock tune with just a 60mm TP and stock exhaust.
NOTE: The green and red lines below are reversed! The green line below goes with the red line in the plot above, and the red liine below goes with the green lin in the plot above. Sorry.
NOTE: The green and red lines below are reversed! The green line below goes with the red line in the plot above, and the red liine below goes with the green lin in the plot above. Sorry.
#27
Former Sponsor
Thread Starter
Oh, and I forgot to mention that all of the plots in this thread were done with a PWJDM intake, Hondata IMG, and some of them were done with larger injectors. However, I didn't overlay any plots for comparison that didn't have the same supporting mods.
#28
Registered User
Originally Posted by gernby,Jan 26 2011, 07:08 AM
I thought I mentioned that. The 70mm HFC with stock exhaust was terrible. It didn't perform well, and it droned worse than any other combo.
#29
Former Sponsor
Thread Starter
Originally Posted by takchi,Jan 26 2011, 03:31 PM
I appreciate your work! Does that test include custom tune too?
#30
Could you run a 70mm tp with a stock header and 60mm aftermarket exhaust would there be any benefit over the 60mm tp? or is it just a waste to go 70mm on that setup. Opinion please.