New Sikky Headers
#16
Lexus Champion
iTrader: (9)
Well, I'm a bit skeptical. Every other Dyno Chart I've seen has peak Torque coming in @ about 5100RPM and peak HP at about 6K RPM with power falling off after that. This curve is quite atypical. Peak Torque @ 5600 RPM and HP going all the way to 6900RPM, when the stock ISF has a cutoff @ 6800RPM.
I've attached two attachments. #1 is the graph I've pulled from the video. #2 is an overlay of an old dyno of mine with the Sikky graph.
Lou
I've attached two attachments. #1 is the graph I've pulled from the video. #2 is an overlay of an old dyno of mine with the Sikky graph.
Lou
#17
Rookie
Thread Starter
From what I'm told, Sikky worked very hard for a long time to develop a design that would allow 1 7/8" to fit in the already limited space in the isf engine bay. This is the likely reason that size hasn't been done until now.
And yes, the dipstick has to be relocated.
Lou, I get your skepticism, and there will always be never ending debate when it comes to dyno charts. It's very difficult to compare results from different dynos, on different cars in different areas of the country. Best that can be done is back to back dyno runs with close to the same conditions as possible with the new headers being (mostly) the only variable.
Either way, I'm sure there will by more dynos for these to look at soon to see if the results are consistent.
And yes, the dipstick has to be relocated.
Lou, I get your skepticism, and there will always be never ending debate when it comes to dyno charts. It's very difficult to compare results from different dynos, on different cars in different areas of the country. Best that can be done is back to back dyno runs with close to the same conditions as possible with the new headers being (mostly) the only variable.
Either way, I'm sure there will by more dynos for these to look at soon to see if the results are consistent.
#18
I don't think it's weird at all to redevelop your product after some new advancements in the chassis (tuning) have become available. If anything more power to them for even bothering when the existing product technically functioned just fine.
Curious to see retail pricing.
Curious to see retail pricing.
#19
Lexus Champion
iTrader: (9)
Lou, I get your skepticism, and there will always be never ending debate when it comes to dyno charts. It's very difficult to compare results from different dynos, on different cars in different areas of the country. Best that can be done is back to back dyno runs with close to the same conditions as possible with the new headers being (mostly) the only variable.
It also shows the new Sikky header actually making less power up to 6300RPM when it starts to pull ahead. This would mean less performance in the area where it's most needed. And how does it rev past the redline?
Lou
#20
Aren't dyno jets notorious for difficulty in getting proper rpm readings? I wonder if the tech entered it wrong. It just looks like the entire curve is shifted to the right.
I certainly agree, but the curves look so wrong compared to what I have seen in the past.
It also shows the new Sikky header actually making less power up to 6300RPM when it starts to pull ahead. This would mean less performance in the area where it's most needed. And how does it rev past the redline?
Lou
It also shows the new Sikky header actually making less power up to 6300RPM when it starts to pull ahead. This would mean less performance in the area where it's most needed. And how does it rev past the redline?
Lou
#22
Instructor
track times are the only true measurement!!!
#24
Rookie
Thread Starter
I certainly agree, but the curves look so wrong compared to what I have seen in the past.
It also shows the new Sikky header actually making less power up to 6300RPM when it starts to pull ahead. This would mean less performance in the area where it's most needed. And how does it rev past the redline?
Lou
It also shows the new Sikky header actually making less power up to 6300RPM when it starts to pull ahead. This would mean less performance in the area where it's most needed. And how does it rev past the redline?
Lou
#25
11 Second Club
iTrader: (2)
Nice gains GR8WHITE! Though I don't have actual dyno sheets myself (still waiting) with these new headers on my car, I have seen them and the car is making more power (more so top end) than the original headers. I can say that with SIKKY having had my car for nearly a year, they didn't rush anything and the new headers have been proven both in house and at a third party to produce more power than both the original design and the current PPE headers. Quality control complaints have all been addressed from the past and everything about the header improved upon. Not only that, but I believe it was the goal of SIKKY to have the "best" headers on the market.
With all that said, I too don't like the dyno graph posted by the OP either as it does look off in the rpm points, but the gains are certainly there shown before and after, just not in anyone's best interest to try and compare them with other dyno plots.
With all that said, I too don't like the dyno graph posted by the OP either as it does look off in the rpm points, but the gains are certainly there shown before and after, just not in anyone's best interest to try and compare them with other dyno plots.
Last edited by caymandive; 08-25-16 at 11:50 AM.
#28
Pole Position
Nice gains GR8WHITE! Though I don't have actual dyno sheets myself (still waiting) with these new headers on my car, I have seen them and the car is making more power (more so top end) than the original headers. I can say that with SIKKY having had my car for nearly a year, they didn't rush anything and the new headers have been proven both in house and at a third party to produce more power than both the original design and the current PPE headers. Quality control complaints have all been addressed from the past and everything about the header improved upon. Not only that, but I believe it was the goal of SIKKY to have the "best" headers on the market.
With all that said, I too don't like the dyno graph posted by the OP either as it does look off in the rpm points, but the gains are certainly there shown before and after, just not in anyone's best interest to try and compare them with other dyno plots.
With all that said, I too don't like the dyno graph posted by the OP either as it does look off in the rpm points, but the gains are certainly there shown before and after, just not in anyone's best interest to try and compare them with other dyno plots.
#29
11 Second Club
iTrader: (2)
Yes primarily for the header R&D, but they were also working on some other parts at the same time which may or may not be marketed. Obviously they didn't put a full year into it as this was a project they fit in as time permitted, but they were meticulous in testing.
Last edited by caymandive; 08-25-16 at 03:00 PM.
#30
Rookie
Thread Starter
Funny, I asked that exact question before they were installed, and and they said they have only seen an increase throughout the range, with the biggest improvement up top. And I can't attest it certainly feels stronger throughout.