Pics Of My Advanced Induction Dart/RHS 223cc Heads/Build Thread
04-22-2016, 08:45 AM
#405
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You mentioned my results earlier, from switching from the stainless works LTs to the 1 7/8" Kooks.
Heads/Cam/Fast/every bolt on with the stainless works 1 3/4 w/ 2.5in collectors, into a y-pipe and slp dual/dual my car made 420/375. I switched to Kooks 1 7/8" to 3" collectors into 3" true duals, and made 440/390.
Then like you mentioned about the 4" custom intake, I went from the factory MAF, and SLP lid, to a 4" tube out to a velocity stack at the bumper. Car made 470/405. On a mustang dyno with a 54lb clutch, 3" steel driveshaft, 28x12.5 drag radials, 12-bolt etc.
The results weren't completely from just the headers or just the 4" intake. Going from a y-pipe to true duals, and losing the factory MAF helped too. Same dyno, different days obviously.
Heads/Cam/Fast/every bolt on with the stainless works 1 3/4 w/ 2.5in collectors, into a y-pipe and slp dual/dual my car made 420/375. I switched to Kooks 1 7/8" to 3" collectors into 3" true duals, and made 440/390.
Then like you mentioned about the 4" custom intake, I went from the factory MAF, and SLP lid, to a 4" tube out to a velocity stack at the bumper. Car made 470/405. On a mustang dyno with a 54lb clutch, 3" steel driveshaft, 28x12.5 drag radials, 12-bolt etc.
The results weren't completely from just the headers or just the 4" intake. Going from a y-pipe to true duals, and losing the factory MAF helped too. Same dyno, different days obviously.
04-22-2016, 09:20 AM
#406
Thanks for the reply ezzlez28. The headers are on, so should have numbers tonight. Anyone care to guess if putting the SLP Loud Mouth 1 resonators right off the headers would be a power increase over the Texas Speed 3" true duals?
04-23-2016, 06:50 AM
#407
You HAVE seen the inside of a LM1 right? It's nothing more than a larger ID and OD pipe. That's IT! They're useless. There's a reason I cut that crap off when I made a MagnaMouth.
You'd actually flow more running a straight 3" pipe that won't introduce turbulence, or a pair of Magnaflow 14419's in place of whatever mufflers are on the duals now.
Personally, I'd sell the LM1 "resonators" (4" OD expanded piece of pipe that tapers to 3" on both ends).
04-23-2016, 02:04 PM
#409
Pics Of My Advanced Induction Dart/RHS 223cc Heads/Build Thread Bigger headers are on, and the dyno numbers show I gained 6 rwhp in the mid range and lost rwhp up top. We think the intake is the big reason for the loss up top. Kent is going to try a few things with the tune to see if we can get more out of it.
Last edited by Rise of the Phoenix; 04-23-2016 at 06:16 PM.
04-24-2016, 02:25 PM
#413
Me too. Kind of at a loss. I know he made some calibration changes to the dyno, but I believe he said he was going to put them back to the way they were the first time my car was on the dyno. Something to do with the weight of the rollers.
04-24-2016, 08:59 PM
#416
The LS6 intake is holding you back, it's not the headers. As not to be short with my response I decided to add a bit more information.
You saw and even mentioned my H/C results a month or so ago. I told you then after the FAST 92/92 install the car was a different animal. I've had too many cars to speak of that make big power. Lots of respectable people including Alvin Anderson told me to add a Fast Intake after he DT'd the car and it made 440/407 with the LS6 intake and stock untouched 78MM TB. (Unfortunately the car now resides in another state and we want get the real world comparison's.)
After much soul searching I decided to pull the trigger. I'm telling you this was the very first time with a high compression motor, just switching the intake gave me that Holy S*** experience. The car was so different in every aspect. Throttle response improved by 100%.
Take me for my word. I'm not a kid with pipe dreams posting internet garbage.
The headers will help mid-top range by 5-8 hp on a dynojet.
Put a Fast 92mm on the car and you'll see where the potential really is.
You saw and even mentioned my H/C results a month or so ago. I told you then after the FAST 92/92 install the car was a different animal. I've had too many cars to speak of that make big power. Lots of respectable people including Alvin Anderson told me to add a Fast Intake after he DT'd the car and it made 440/407 with the LS6 intake and stock untouched 78MM TB. (Unfortunately the car now resides in another state and we want get the real world comparison's.)
After much soul searching I decided to pull the trigger. I'm telling you this was the very first time with a high compression motor, just switching the intake gave me that Holy S*** experience. The car was so different in every aspect. Throttle response improved by 100%.
Take me for my word. I'm not a kid with pipe dreams posting internet garbage.
The headers will help mid-top range by 5-8 hp on a dynojet.
Put a Fast 92mm on the car and you'll see where the potential really is.
04-25-2016, 06:33 AM
#417
Yeah, I believe you're right. Tell me if my thinking is correct here. I have bigger headers that flow better than the old ones. These bigger headers gained down low and through the midrange, but the fizzled out up top because the stock intake and TB could not keep up and feed them the air they needed. Does that sound about right?
04-25-2016, 07:20 AM
#418
Unless the Map readings are showing a restriction, I do not think the LS6 intake is a big enough restriction where you should of lost power with 1 7/8. I believe the issue is the difference in dyno calibration. Sure he said it was put back to whatever the settings were from last session but it is still apples to oranges. The bottom line is you were on a dyno that had some changes made to it and it was a different day/conditions...I do think a ported Fast will net some solid gains.
04-25-2016, 07:51 AM
#419
Unless the Map readings are showing a restriction, I do not think the LS6 intake is a big enough restriction where you should of lost power with 1 7/8. I believe the issue is the difference in dyno calibration. Sure he said it was put back to whatever the settings were from last session but it is still apples to oranges. The bottom line is you were on a dyno that had some changes made to it and it was a different day/conditions...I do think a ported Fast will net some solid gains.
I'll be on the search for a used FAST 92 setup.
