216rwhp Streetport 13bre. Sure did take a while!
11-26-08, 12:35 AM
#77
For testing I make my own. Once its where I want it, then I purchase one built to spec from SPD. On this car however I dont know if the 1-2 hp is worth the cost. Its a very very cheap test mule.
Last edited by GtoRx7; 11-26-08 at 12:38 AM.
11-26-08, 12:24 PM
#79
Old [Sch|F]ool
11-26-08, 01:02 PM
#80
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thank you
11-26-08, 03:01 PM
#83
The one thing I've learnt when dealing with NA rotaries is that there is no set equation when designing a header/collector. Every combination requires a specific setup to be most effective. Everything else is just a compromise. The same holds for intake tuning.
Last edited by crispeed; 11-26-08 at 03:16 PM.
11-27-08, 01:06 AM
#86
From what I tried so far testing is that a full exhaust setup will like a 4-6" megaphone, and a header only setup will like 12" or more. As Crispeed said there are so many combinations, I could be way off from the ideal setup however.
11-27-08, 10:23 AM
#91
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[QUOTE=crispeed;
The one thing I've learnt when dealing with NA rotaries is that there is no set equation when designing a header/collector. Every combination requires a specific setup to be most effective. Everything else is just a compromise. The same holds for intake tuning.[/QUOTE]
Please let me know if i get this right:
it is better to design/build a exhaust header length(wise)and intake length(wise), so both systems have their best effeciency at the same rpm, to get the best "drafting" so to speak,
right?
The one thing I've learnt when dealing with NA rotaries is that there is no set equation when designing a header/collector. Every combination requires a specific setup to be most effective. Everything else is just a compromise. The same holds for intake tuning.[/QUOTE]
Please let me know if i get this right:
it is better to design/build a exhaust header length(wise)and intake length(wise), so both systems have their best effeciency at the same rpm, to get the best "drafting" so to speak,
right?
11-27-08, 12:59 PM
#93
Nice radius on the header exiting the ports!
Last edited by crispeed; 11-27-08 at 01:09 PM.
11-30-08, 02:17 AM
#95
Hmm that seams kind of hard. I don't have that kind of equipment so I have to get creative. I take your average medium sized paper cup (like what you would get from Burger King and cut it in half. The taper on these cups are perfect. I then trace that pattern on 3" diameter exhaust tubing and use my miter saw with metal cutting blade to cut it. Join both peices together and tack weld. The two ends will be football shaped so you will have to shape the ends to make them perfectly round. Using this method I have one end at 2.5" and the other at 3.5". Takes about 30mins to do it.
11-30-08, 07:27 PM
#97
Everyone agrees on this point. The ENGINE still makes the same power. The dyno sheets are from a CHASSIS dyno. A CHASSIS dyno shows drivetrain loss. Less drivetrain loss means more WHEEL horsepower which is what really matters as that is what's usable.
This is true, more so in a turbo application where you need to worry about boost falling off between shifts, etc. But seeing as all we're discussing is N/A cars...
And not everyone likes going fast in a straight line
This is true, more so in a turbo application where you need to worry about boost falling off between shifts, etc. But seeing as all we're discussing is N/A cars...
And not everyone likes going fast in a straight line
12-04-08, 10:03 AM
#99
Junior Member
you might be interested in my mid pipe expansion chamber exhaust street port six ports scca e-production cars we make(195whp 48ida 38choke 1st gen -230whp sec gen efi stock intake ported stock t-body) have shown gains on even stock motors
in back to back testing on 2 sec gen its cars running(motec) identical set ups the pipe showed gains of 4-7whp between 4-6.8k and after peak(8200)gains at 9000 were 9.8 hp over none pipe set up.if you are interested drop me a email or call me at 954-825-8288
in back to back testing on 2 sec gen its cars running(motec) identical set ups the pipe showed gains of 4-7whp between 4-6.8k and after peak(8200)gains at 9000 were 9.8 hp over none pipe set up.if you are interested drop me a email or call me at 954-825-8288
12-04-08, 08:15 PM
#100
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you might be interested in my mid pipe expansion chamber exhaust street port six ports scca e-production cars we make(195whp 48ida 38choke 1st gen -230whp sec gen efi stock intake ported stock t-body) have shown gains on even stock motors
in back to back testing on 2 sec gen its cars running(motec) identical set ups the pipe showed gains of 4-7whp between 4-6.8k and after peak(8200)gains at 9000 were 9.8 hp over none pipe set up.if you are interested drop me a email or call me at 954-825-8288
in back to back testing on 2 sec gen its cars running(motec) identical set ups the pipe showed gains of 4-7whp between 4-6.8k and after peak(8200)gains at 9000 were 9.8 hp over none pipe set up.if you are interested drop me a email or call me at 954-825-8288