Greddy Turbo Questions thread....
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From: Phillips Ranch 909!
Originally Posted by Chris_Lum,Jun 29 2008, 09:48 AM
OK, so i have to comment on what i previously stated about my boost dropping when i switched from an 80mm catback to a 70mm catback.
Turns out this was untrue!
Once i swapped the 70mm in, i thought i had seen more boost w/ the 80mm, but my memory failed me. I swapped the 80mm back on today, and turns out, i actually hit less boost than i did with the 70mm!! BUT i'm guessing that this is because i was actually tuned on the 80mm and NOT on the 70mm so i was seeing more spiking. On the 70mm I was spiking about 1 psi more than the 80mm. So i'm thinking that the 70mm is big enough for at least 300whp, i just need to get my car tuned on the 70mm to run optimally.
This is good news, because i thought i was giving up some power in order to run a quieter exhaust, however, i can probably still hit 300whp with the 70mm, just need to tune with it. =)
Turns out this was untrue!
Once i swapped the 70mm in, i thought i had seen more boost w/ the 80mm, but my memory failed me. I swapped the 80mm back on today, and turns out, i actually hit less boost than i did with the 70mm!! BUT i'm guessing that this is because i was actually tuned on the 80mm and NOT on the 70mm so i was seeing more spiking. On the 70mm I was spiking about 1 psi more than the 80mm. So i'm thinking that the 70mm is big enough for at least 300whp, i just need to get my car tuned on the 70mm to run optimally.
This is good news, because i thought i was giving up some power in order to run a quieter exhaust, however, i can probably still hit 300whp with the 70mm, just need to tune with it. =)
Joined: Sep 2006
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From: Irvine
oh sorry, i should have clarified the spiking. I'm still not creeping or spiking like some guys here...meaning, the spiking that i get is not a problem AT ALL.
I haven't had any major problems with creep or spiking with either exhaust probably due to my stock cat.
what i mean was happening is this: I thought by switching to a 70mm that my boost dropped by 1 full psi due to the smaller diameter exhaust system. However i was wrong and boost wasn't dropping (i just didn't recall correctly how much boost i was hitting on the 80mm).
With the 80mm and my boost set at 9-9.5psi, my EBC shows a peak of 10.1 at most. I know this is a spike because when i do a WOT run, i watch my EBC and it holds at 9-9.5psi.
With the 70mm and boost set at 9-9.5 psi (exact same settings), my EBC showed a peak of 11.1 sometimes. Not to mention my gas mileage was horrible. So knowing that the 70mm obviously does NOT flow as much as the 80mm, i can state that the spiking is likely due to the fact that i am untuned on the 70mm and NOT running as optimally as i was on the 80mm.
So you can see that i am not spiking horribly. Just thought i'd correct my previous thoughts that the 70mm made my car run less boost.
I haven't had any major problems with creep or spiking with either exhaust probably due to my stock cat.
what i mean was happening is this: I thought by switching to a 70mm that my boost dropped by 1 full psi due to the smaller diameter exhaust system. However i was wrong and boost wasn't dropping (i just didn't recall correctly how much boost i was hitting on the 80mm).
With the 80mm and my boost set at 9-9.5psi, my EBC shows a peak of 10.1 at most. I know this is a spike because when i do a WOT run, i watch my EBC and it holds at 9-9.5psi.
With the 70mm and boost set at 9-9.5 psi (exact same settings), my EBC showed a peak of 11.1 sometimes. Not to mention my gas mileage was horrible. So knowing that the 70mm obviously does NOT flow as much as the 80mm, i can state that the spiking is likely due to the fact that i am untuned on the 70mm and NOT running as optimally as i was on the 80mm.
So you can see that i am not spiking horribly. Just thought i'd correct my previous thoughts that the 70mm made my car run less boost.
Thread Starter
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Joined: Jun 2003
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From: New York
I just want to warn everyone from my friend's Greddy Turboed RSX experience...
If the s2000 cat is anything like the RSX cat, expect your car to kill the cat inside of 3000 miles. My friend's car, the turbo make the cat smell like rotten eggs within 2000 miles of hard driving.
Just an observation.
If the s2000 cat is anything like the RSX cat, expect your car to kill the cat inside of 3000 miles. My friend's car, the turbo make the cat smell like rotten eggs within 2000 miles of hard driving.
Just an observation.
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From: Moravian Falls NC
Just finished the install today and so far im very impressed feels like a different car. only thing I have a little bit of a ruff idle. im running a megan test pipe and 3 1/2 inch exaust and the car feels nice. cant wait for a tune anybody know a good emanage tuner in the carolina's?
Thread Starter
Former Moderator
Joined: Jun 2003
Posts: 18,852
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From: New York
With a 3.5" exhaust, I'd lay off the boost until you get a tune, or else you might not make it to your tuner. I suggest you get rid of the exhaust. The rough idle is from the ECU learning new trims. Take it easy on the car, let it learn everything, and the idle will become smooth again.
Joined: Sep 2006
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From: Irvine
[QUOTE=NFRs2000NYC,Jun 29 2008, 12:08 PM] I just want to warn everyone from my friend's Greddy Turboed RSX experience...
If the s2000 cat is anything like the RSX cat, expect your car to kill the cat inside of 3000 miles.
If the s2000 cat is anything like the RSX cat, expect your car to kill the cat inside of 3000 miles.
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Joined: Dec 2007
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From: Raleigh, NC
Yeah, mine is an 01 with 45k on it. I went back to the stock map, which loves 10's,and that was my cats undoing. It's definitely the tune.
On a side note, my EMU flaked out today. I think it's been my main problem all along. It's never, ever, been stable. It is now reading 7.8 afr's on map trace no matter what I do. I switched input ports, tweaked the settings, etc. I also noticed you could fry eggs on the bottom after driving. I give up on the EMU. I honestly HATE it, and am going AEM. It may be overkill, but it's worth the piece of mind to me. I know I'll probably get the "you did something wrong" comments, but I didn't. It had jumpers rattling around in it out of the box, the coils where set to 12v, and vtec wasn't even engaged in the settings. A big
to Greddy for that one. Phew...sorry for the rant.
On a side note, my EMU flaked out today. I think it's been my main problem all along. It's never, ever, been stable. It is now reading 7.8 afr's on map trace no matter what I do. I switched input ports, tweaked the settings, etc. I also noticed you could fry eggs on the bottom after driving. I give up on the EMU. I honestly HATE it, and am going AEM. It may be overkill, but it's worth the piece of mind to me. I know I'll probably get the "you did something wrong" comments, but I didn't. It had jumpers rattling around in it out of the box, the coils where set to 12v, and vtec wasn't even engaged in the settings. A big
to Greddy for that one. Phew...sorry for the rant.
Joined: Sep 2006
Posts: 7,643
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From: Irvine
besides the jumpers rattling around, your settings were correct. It's supposed to be on 12V. It was likely on 5V input and 12V output. Greddy sets it like this because they have found that certain cars run better like this. Although a car might be 5V, it won't output more than 5V if input is only 5V. And vtec jumpers weren't set because vtec wires weren't routed through the emanage since vtec engagement wasn't changed. So greddy didn't do anything wrong in the emanage......
While a bad emanage CAN happen, it usually isn't the case when people experience tuning problems. Usually the person could benefit from a better tune.
While a bad emanage CAN happen, it usually isn't the case when people experience tuning problems. Usually the person could benefit from a better tune.