Results switching from a stock Y-pipe to a 3" custom one
#16
Having a custom Y pipe built now. I had an aftermarket 3 inch job
but it never fit! In between boost leaks it was awesome
I had Markski take it off because it took an extra 2 hours to do
anything in the engine bay and I was tired of hearing Markski
cursing out a Y pipe lol.
I can attest to the difference it makes. I'm not one bit surprised
at the power under the curve and the massive torque gain.
but it never fit! In between boost leaks it was awesome
I had Markski take it off because it took an extra 2 hours to do
anything in the engine bay and I was tired of hearing Markski
cursing out a Y pipe lol.
I can attest to the difference it makes. I'm not one bit surprised
at the power under the curve and the massive torque gain.
#17
Hey John!
alpha 28s, Markski: ICs, 3 inch catless x design exhaust, K&N, coil packs,
2nd fuel pump, 60 lb inj., headers etc...
H & R coilovers, multi link CA's, sport struts, short shift / linkage, Recaros
340 lb's off stock. Recorded a 5.46 60-130.
alpha 28s, Markski: ICs, 3 inch catless x design exhaust, K&N, coil packs,
2nd fuel pump, 60 lb inj., headers etc...
H & R coilovers, multi link CA's, sport struts, short shift / linkage, Recaros
340 lb's off stock. Recorded a 5.46 60-130.
#18
you forgot fully built motor!! rods and such! the animal!!
#19
It was making a hair more boost I think because it was a tad cooler that day. Anyhow, even where it was making less boost than before it was making more power.
#22
Hi,
I am trying to read the graphs correctly, but could need some help:
Torque and Power bands are not crossing where they should and the torque curve ends a lot earlier than the power curve, which should not happen in a single run.
I would say that both results from a miscalibrated dyno or wrong setup, but maybe you guys where doing something in purpose to the dyno?
I would be glad to hear what the reasons for these symptoms are.
Andreas
I am trying to read the graphs correctly, but could need some help:
Torque and Power bands are not crossing where they should and the torque curve ends a lot earlier than the power curve, which should not happen in a single run.
I would say that both results from a miscalibrated dyno or wrong setup, but maybe you guys where doing something in purpose to the dyno?
I would be glad to hear what the reasons for these symptoms are.
Andreas
#23
Hi,
I am trying to read the graphs correctly, but could need some help:
Torque and Power bands are not crossing where they should and the torque curve ends a lot earlier than the power curve, which should not happen in a single run.
I would say that both results from a miscalibrated dyno or wrong setup, but maybe you guys where doing something in purpose to the dyno?
I would be glad to hear what the reasons for these symptoms are.
Andreas
I am trying to read the graphs correctly, but could need some help:
Torque and Power bands are not crossing where they should and the torque curve ends a lot earlier than the power curve, which should not happen in a single run.
I would say that both results from a miscalibrated dyno or wrong setup, but maybe you guys where doing something in purpose to the dyno?
I would be glad to hear what the reasons for these symptoms are.
Andreas
#25
Thanks for posting!
I am going to putting on a custom 2.5" y-pipe markski made for me shortly...i am having diverter valves build on each side because I am running alpha 3076s.
Just curious, but why did you go with 3" if you intercooler outlets are 2.5"? Because the plenum and tb are 2.9"?
Thanks
Ben
I am going to putting on a custom 2.5" y-pipe markski made for me shortly...i am having diverter valves build on each side because I am running alpha 3076s.
Just curious, but why did you go with 3" if you intercooler outlets are 2.5"? Because the plenum and tb are 2.9"?
Thanks
Ben
#26
Thanks for posting!
I am going to putting on a custom 2.5" y-pipe markski made for me shortly...i am having diverter valves build on each side because I am running alpha 3076s.
Just curious, but why did you go with 3" if you intercooler outlets are 2.5"? Because the plenum and tb are 2.9"?
Thanks
Ben
I am going to putting on a custom 2.5" y-pipe markski made for me shortly...i am having diverter valves build on each side because I am running alpha 3076s.
Just curious, but why did you go with 3" if you intercooler outlets are 2.5"? Because the plenum and tb are 2.9"?
Thanks
Ben
Velocity has its advantage over Volume,,as long as the piping has an adequate diameter to flow enough to begin with and velocity usually gives a better all around flow curve..
Just my opinion here from what I have tested.
#27
Thanks for posting!
I am going to putting on a custom 2.5" y-pipe markski made for me shortly...i am having diverter valves build on each side because I am running alpha 3076s.
Just curious, but why did you go with 3" if you intercooler outlets are 2.5"? Because the plenum and tb are 2.9"?
Thanks
Ben
I am going to putting on a custom 2.5" y-pipe markski made for me shortly...i am having diverter valves build on each side because I am running alpha 3076s.
Just curious, but why did you go with 3" if you intercooler outlets are 2.5"? Because the plenum and tb are 2.9"?
Thanks
Ben
Also the two, 2.5'', legs of the Y pipe merge will flow more then enough to feed a 2.9 TB opening.
Velocity has its advantage over Volume,,as long as the piping has an adequate diameter to flow enough to begin with and velocity usually gives a better all around flow curve..
Just my opinion here from what I have tested.
Velocity has its advantage over Volume,,as long as the piping has an adequate diameter to flow enough to begin with and velocity usually gives a better all around flow curve..
Just my opinion here from what I have tested.
#28
I went with 3" because I had a 3" wiggins clamp that I wanted to tie into my tb and plenum that are both 74mm. No other reason really. Now that I am seeing no loss in spool or tq it is all worth it to me. The car feels night and day difference on the street.
How do you know it will "flow more than enough"? Any test data? Vs a 3"? I will never know if my 3" performs less than a 2.5" but I see zero downside compared to the stocker so I will stick with it.
How do you know it will "flow more than enough"? Any test data? Vs a 3"? I will never know if my 3" performs less than a 2.5" but I see zero downside compared to the stocker so I will stick with it.
I KNOW from building ones for my race Harley that two 2.5'' pipes going into a 3 '' merge is too small to flow both of those.. When I get home I will look up my math books for formula..
Also many have made big HP on 2.5'' and I believe Speedtech tested both..
I have my stock Y - pipe modified to match my 74mm TB by Protomotive and EVO does it also and runs them.
#29
i'd like to swap my y pipe with yours on the dyno and see what happens since mine is two 2.5" into a single 3". given that we both use the same wiggins and intercoolers it should be pretty easy. only thing is my center runner on the Y is a bit shorter because the 997tt intake puts the TB out further...
__________________
#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
#30
Thanks for posting!
I am going to putting on a custom 2.5" y-pipe markski made for me shortly...i am having diverter valves build on each side because I am running alpha 3076s.
Just curious, but why did you go with 3" if you intercooler outlets are 2.5"? Because the plenum and tb are 2.9"?
Thanks
Ben
I am going to putting on a custom 2.5" y-pipe markski made for me shortly...i am having diverter valves build on each side because I am running alpha 3076s.
Just curious, but why did you go with 3" if you intercooler outlets are 2.5"? Because the plenum and tb are 2.9"?
Thanks
Ben
just sharing...
__________________
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL