non sequential mod?
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non sequential mod?
Can someone explain the pro's and con's to the non sequential turbo mod? My car has a full open exhaust (downpipe, midpipe, racing beat catback), custom open intake (coming soon), HKS S-AFR, and thinking about an aftermarket SMIC and the new Apexi Ignition timing controller when it becomes available...
Any thoughts? How much of a power gain is this usually over stock? How is low end? And how much exactly can a stock motor handle? As far as I know this is the original motor in the car... But with only a downpipe we managed a 13.5 so who knows....
Anyways, let me know what you all think. Can't really find any information about this using the search function. So please, no flames :P
Thanks
Chuck
Any thoughts? How much of a power gain is this usually over stock? How is low end? And how much exactly can a stock motor handle? As far as I know this is the original motor in the car... But with only a downpipe we managed a 13.5 so who knows....
Anyways, let me know what you all think. Can't really find any information about this using the search function. So please, no flames :P
Thanks
Chuck
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From what I've read there is no power gain, it just gets the 2nd turbo spooled up a whole lot sooner .. sorts out the hesitation as the 2nd comes online with stock set-up.
Try www.dontbearikki.com for plenty on the benefits of this.
Try www.dontbearikki.com for plenty on the benefits of this.
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Originally posted by shaun.sheldrake
From what I've read there is no power gain, it just gets the 2nd turbo spooled up a whole lot sooner .. sorts out the hesitation as the 2nd comes online with stock set-up.
Try www.dontbearikki.com for plenty on the benefits of this.
From what I've read there is no power gain, it just gets the 2nd turbo spooled up a whole lot sooner .. sorts out the hesitation as the 2nd comes online with stock set-up.
Try www.dontbearikki.com for plenty on the benefits of this.
Cruising speeds, the car doesn't have throttle issues either. It's also VERY SMOOTH in non-sequential mode.
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Hmm.... differing opinions I see. Well, I read somewhere that someone lost power from it and changed back to sequential... That kind of told me it's not a good idea. Am I wrong to have assumed that so early?
Thanks
Chuck
Thanks
Chuck
#6
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Originally posted by agent712
Hmm.... differing opinions I see. Well, I read somewhere that someone lost power from it and changed back to sequential... That kind of told me it's not a good idea. Am I wrong to have assumed that so early?
Thanks
Chuck
Hmm.... differing opinions I see. Well, I read somewhere that someone lost power from it and changed back to sequential... That kind of told me it's not a good idea. Am I wrong to have assumed that so early?
Thanks
Chuck
You don't lose power per say, but change when the power is applied. That loss at the low end is applied to the midrange, so it equals out. You don't lose or gain any raw HP at all with going non-seq. It's just when the power comes on that changes.
Some people like it because it makes the power more predicable. Me? I'll keep what little low end I already have...
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Hmm, ok cool... Another question... Just how much boost is tolerable on a stock motor? And when you want to run more boost, what exactly is required to do so?
Thanks
Chuck
Thanks
Chuck
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#8
Mr. Links
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Originally posted by agent712
Hmm, ok cool... Another question... Just how much boost is tolerable on a stock motor? And when you want to run more boost, what exactly is required to do so?
Thanks
Chuck
Hmm, ok cool... Another question... Just how much boost is tolerable on a stock motor? And when you want to run more boost, what exactly is required to do so?
Thanks
Chuck
As far as how to increase boost, you need to increase air flow and fuel.
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Oh really? I was under the impression the motor's couldn't really handle the boost... If it's the turbo's then that's a different story... Why can't they handle much more than 15 lbs? If that's the case I'm going to start playing with the boost and fuel controller....
Thanks
Chuck
Thanks
Chuck
#10
Mr. Links
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Originally posted by agent712
Oh really? I was under the impression the motor's couldn't really handle the boost... If it's the turbo's then that's a different story... Why can't they handle much more than 15 lbs? If that's the case I'm going to start playing with the boost and fuel controller....
Thanks
Chuck
Oh really? I was under the impression the motor's couldn't really handle the boost... If it's the turbo's then that's a different story... Why can't they handle much more than 15 lbs? If that's the case I'm going to start playing with the boost and fuel controller....
Thanks
Chuck
Make sure to have an aftermarket IC. Once you start increasing boost, you'll need a more efficient IC. Most people usually recommend the IC upgrade if you plan on using more than 12 PSI on boost, as well as an ECU upgrade.
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Yeah, intercooler is next on the list. Might put on a water injection kit though for awhile to get us by... As for computer though I'm just planning on using the HKS S-AFR and Apexi Ignition timing controller (when released) for tuning. I figure the stock curves should be fine... it's just adjusting them up and down that will need done. So that's why I'm going this route. Just seems easier to me if a person plans to keep modding. Better than spending a chunk of change every time you do a mod I guess...
Later
Chuck
Later
Chuck
#12
Mr. Links
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Originally posted by agent712
Yeah, intercooler is next on the list. Might put on a water injection kit though for awhile to get us by... As for computer though I'm just planning on using the HKS S-AFR and Apexi Ignition timing controller (when released) for tuning. I figure the stock curves should be fine... it's just adjusting them up and down that will need done. So that's why I'm going this route. Just seems easier to me if a person plans to keep modding. Better than spending a chunk of change every time you do a mod I guess...
Later
Chuck
Yeah, intercooler is next on the list. Might put on a water injection kit though for awhile to get us by... As for computer though I'm just planning on using the HKS S-AFR and Apexi Ignition timing controller (when released) for tuning. I figure the stock curves should be fine... it's just adjusting them up and down that will need done. So that's why I'm going this route. Just seems easier to me if a person plans to keep modding. Better than spending a chunk of change every time you do a mod I guess...
Later
Chuck
https://www.rx7club.com/forum/showth...hreadid=116858
That car (with basically the entire engine bay polished) is local to me. He's putting down a little over 350rwhp using the Pettit ECU. Granted, that's about as far as he will go, but even with reprogrammed ECU's, you can make some serious power.
Basically, if you are looking to be under 350rwhp, then the standard reprogrammed ECU can get you there. If you want more than that, you will have to get something that can be programmed on a dyno.
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Yeah, for now the fuel and timing controllers are just to simply get us by since I don't feel there is a need for a complete reprogrammed ecu yet. When that time comes we'll do it. But for now we're just doing simple bolt ons. So only minor adjustments will be required... And I plan to do them on a dyno btw. Those stupid autometer a/f gauges are worthless.... So we should be able to get the a/f ratio right to where it needs to be...
Here's another question... What's the most boost you can generally run on pump gas? 91 octane here...
Thanks
Chuck
Here's another question... What's the most boost you can generally run on pump gas? 91 octane here...
Thanks
Chuck
#14
Mr. Links
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Originally posted by agent712
Yeah, for now the fuel and timing controllers are just to simply get us by since I don't feel there is a need for a complete reprogrammed ecu yet. When that time comes we'll do it. But for now we're just doing simple bolt ons. So only minor adjustments will be required... And I plan to do them on a dyno btw. Those stupid autometer a/f gauges are worthless.... So we should be able to get the a/f ratio right to where it needs to be...
Here's another question... What's the most boost you can generally run on pump gas? 91 octane here...
Thanks
Chuck
Yeah, for now the fuel and timing controllers are just to simply get us by since I don't feel there is a need for a complete reprogrammed ecu yet. When that time comes we'll do it. But for now we're just doing simple bolt ons. So only minor adjustments will be required... And I plan to do them on a dyno btw. Those stupid autometer a/f gauges are worthless.... So we should be able to get the a/f ratio right to where it needs to be...
Here's another question... What's the most boost you can generally run on pump gas? 91 octane here...
Thanks
Chuck
As far as pump gas, I don't know if anyone has really done any tests on it, but I would imagine most people wouldn't go beyond 15PSI, mostly for the reliability of the stock turbos.
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Oh ok... well since the HKS is bought and paid for (299 through ) I just figure we'll stick with it. Eventually depending on how tuning goes, we'll probably do something different. But like I said, for now this will work.
Sounds like we need to get an intercooler and crank up the boost First I think we're going to compression check the motor though just to see how it's holding up...
Thanks
Chuck
Sounds like we need to get an intercooler and crank up the boost First I think we're going to compression check the motor though just to see how it's holding up...
Thanks
Chuck
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Originally posted by fd3virgin
fooking lag sucks. mine doesn't reach full boost till like 4200 rpm.
fooking lag sucks. mine doesn't reach full boost till like 4200 rpm.
#18
I LOVE MY NON-SEQ, got me into the 12's so who am I to complain. If you dont have alot of mods though jspec is right, its not right for you. I have about every bolt on possible
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Originally posted by OneBadRx7
I LOVE MY NON-SEQ, got me into the 12's so who am I to complain. If you dont have alot of mods though jspec is right, its not right for you. I have about every bolt on possible
I LOVE MY NON-SEQ, got me into the 12's so who am I to complain. If you dont have alot of mods though jspec is right, its not right for you. I have about every bolt on possible
#21
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PM Rikki. He went thru the traps faster...don't remember what happened, but his non-sequential vs. sequential time sheet shows non-sequential as being faster.
#22
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Originally posted by jspecracer7
What are your mods? Non-sequential is for HEAVILY modded fd's.
What are your mods? Non-sequential is for HEAVILY modded fd's.
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