Upgraded injectors + cold start = rev hang - Page 7 - 8th Generation Honda Civic Forum
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Old 02-18-2010, 05:02 PM   #121 (permalink)
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I think a lot of it has to do with the turbo you're using... if it's too large for the engine, then it'll feel peaky as the power rushes on. My car is really easy to boss through corners, I love the torque, it's amazing and very easy to control.

I've also been working on a new throttle map though.... this has given me the ability to have complete control over the torque output in 1st/2nd gear. And a much broader throw of pedal when trying to put down a moderate amount of torque. I'm thinking that it'll be the key to me getting the car down the 1320 on these all seasons.
Yea my car is the same way. The power delivery is awesome.

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It does depend on the turbo selection, but when you're running 23-25psi on even a small turbo it has quite a kick in the ass, even with throttle modulation (it spools so fast that you go from nothing to OH SHYTE WE'RE MOVING in a split second).
lol..So true.
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Old 02-18-2010, 05:30 PM   #122 (permalink)
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If the S/C setups had a good aftercooler that didn't require running water to it (scary, imo), the S/C setups would be very good options. As it stands right now they are 'meh'. They do however provide very linear power, and as such make an awesome choice for a track car since you're not dealing with the spike in power from spooling a turbo.
the set up for the aftercoolers is the same as say cobras use. and they are very safe and reliable. heat exchangers that use water vs air are way better at cooling.
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Old 02-18-2010, 08:01 PM   #123 (permalink)
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Originally Posted by VitViper View Post
It does depend on the turbo selection, but when you're running 23-25psi on even a small turbo it has quite a kick in the ass, even with throttle modulation (it spools so fast that you go from nothing to OH SHYTE WE'RE MOVING in a split second).
I second that!
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Old 02-18-2010, 09:14 PM   #124 (permalink)
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just another thing i have to add to my list of stuff that needs to be done to my car.
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Old 02-18-2010, 09:21 PM   #125 (permalink)
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the set up for the aftercoolers is the same as say cobras use. and they are very safe and reliable. heat exchangers that use water vs air are way better at cooling.
That may be so, but I'm hesitant to trust it since a leak spells disaster.
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Old 02-19-2010, 01:46 PM   #126 (permalink)
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Just use e85 then .. Like me
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Old 02-19-2010, 01:48 PM   #127 (permalink)
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Just use e85 then .. Like me
That would work if I didn't have a 2 hour round trip to fill up on e85.
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Old 02-19-2010, 04:34 PM   #128 (permalink)
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That would work if I didn't have a 2 hour round trip to fill up on e85.
ditto.

45 min for me each way. i'm just gonna do meth i think. its cheaper and more effective then simply aftercooling.

running both would be ideal but i think meth alone will be awesome.

raises octane too so its kinda like mini e85 lol.
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Old 02-19-2010, 05:20 PM   #129 (permalink)
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Haha. I'll be ordering my meth kit soon, and a hondata 4bar map sensor, and smaller pulley, then get it re tuned. My e85 station is 10 mins away.
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Old 02-19-2010, 09:02 PM   #130 (permalink)
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what injectors are you using again? you'll need very large ones for e85

excited to see your results.
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Old 02-20-2010, 12:26 AM   #131 (permalink)
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5 min from a E85 pump, got to get the tune first. I'm finally in texas you'all!

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Old 02-24-2010, 02:33 PM   #132 (permalink)
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is this good to do with stock injectors?
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Old 02-24-2010, 02:35 PM   #133 (permalink)
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is this good to do with stock injectors?
You shouldn't have to with the stockers.
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Old 02-24-2010, 02:51 PM   #134 (permalink)
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You shouldn't have to with the stockers.
reason i ask is because I will be installing a turbo kit with Fuel Injector Clinic injectors in about a month. but because i dont have too much time in the shop, i am trying to do everything i can to utilize as much lift time as i can.
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Old 02-24-2010, 02:52 PM   #135 (permalink)
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It won't hurt the car with the stockers, so if you want to do it ahead of time. Go ahead.
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Old 02-24-2010, 02:52 PM   #136 (permalink)
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It won't hurt the car with the stockers, so if you want to do it ahead of time. Go ahead.
thank you for the quick answer. add that to the pre shop install list
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Old 02-24-2010, 04:01 PM   #137 (permalink)
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You shouldn't have to with the stockers.
I beg to differ. This made a huge and immediate difference and I have stock injectors. If you haven't reduced the idle RPM curve at points below the temperature that the assist valve closes then you won't notice the rev hang as much because your engine is reving so high to begin with. If you do adjust the idle RPM at these points then it becomes obvious and was totally fixed by pulling the vacuum line.
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Old 02-24-2010, 04:10 PM   #138 (permalink)
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I beg to differ. This made a huge and immediate difference and I have stock injectors. If you haven't reduced the idle RPM curve at points below the temperature that the assist valve closes then you won't notice the rev hang as much because your engine is reving so high to begin with. If you do adjust the idle RPM at these points then it becomes obvious and was totally fixed by pulling the vacuum line.
I never had a problem with the stock injectors, but I felt no need to lower the cold start idle below 1800 back then anyway.
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Old 02-24-2010, 04:19 PM   #139 (permalink)
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I never had a problem with the stock injectors, but I felt no need to lower the cold start idle below 1800 back then anyway.
That probably explains it. I'm actually going to bump some of the settings back up ~100 RPM from where I have it as it takes about 6 cylinder compressions to start when the coolant temp is ~50F but only 2 when it is ~100F.
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Old 03-02-2010, 04:21 PM   #140 (permalink)
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Doing this towards the end of the week, I know Nick is gonna be like "It was about time "

Thanks guys!
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