1999 Forged Bottom FM2 w/ MS1
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Car did not make the power it should, first pull was 187 whp, after a few more pulls and timing/fuel adjusting we got 223 whp at about 13psi seen here:
![](https://www.miataturbo.net/attachments/dynos-timesheets-21/23085d1313767050-1999-forged-bottom-fm2-w-ms1-tim-grey-1.jpg)
Engine ran fine, no smoking or weird noises, turbo seemed fine. AFR's were high 11's at full boost. Some kind of restriction or something, IC maybe? It's old style FM intercooler setup with pipes going all over. I can post an msq and log later.
![](https://www.miataturbo.net/attachments/dynos-timesheets-21/23085d1313767050-1999-forged-bottom-fm2-w-ms1-tim-grey-1.jpg)
Engine ran fine, no smoking or weird noises, turbo seemed fine. AFR's were high 11's at full boost. Some kind of restriction or something, IC maybe? It's old style FM intercooler setup with pipes going all over. I can post an msq and log later.
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you have something going on at 6300 rpm that probably could be corrected to flatten the torque back out. Other than that, it's awesome that a bit of dyno tuning picked up 35 hp. Remember, the dyno is just a tuning tool--You're not racing on it! A car that makes 83 whp on one dyno might make 105 whp on a different dyno on the same day. I didn't pull those numbers out of the air; I was there (stock Miata, Mustang vs Dynojet).
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It shouldn't be. All ECUs do essentially the same thing- they spray fuel and command spark. Most of the development work that's happened in recent years is about running accessories, accepting a wider variety of trigger inputs, tuning for emissions, etc.
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(Caveat: I have no direct experience with MS1 other than keyboard jockeys facepalming when it's mentioned in recent times with the release of MS2 and MS3.)
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Alright, compression might explain some of the lower numbers, but doesn't explain the early power drop-off.
Wonder if it's because of the comparative archaic nature of MS1 vs. more modern options.
Is the head healthy? Did you go through it at the same time you went through the bottom end?
Wonder if it's because of the comparative archaic nature of MS1 vs. more modern options.
Is the head healthy? Did you go through it at the same time you went through the bottom end?
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Completely dissatisfied "Hydra-guy." I can't stand this damn thing. Unfortunately, i bought the car with it already installed. But like i said, i was grasping at straws since i have no hands-on experience with MS1.
What turbine restriction are we talking about, though? This turbo should pull to redline pretty good. (At least, looking at FM's dynos of the same turbo.)
Last edited by concealer404; 08-19-2011 at 01:17 PM.
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That is a small turbo anyways, you didnt expect it to make THAT much did you? pretty on par with numbers you should make.
Lets see your timing map. Assuming your AFR's are on par through the pull.
Lets see your timing map. Assuming your AFR's are on par through the pull.
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The MS1's native fuel resolution (assuming the old, non-HiRes code) is 0.1ms per step. At idle, that represents a significant proportion of the total injector on-time. At high load, it's utterly insignificant.
You can make the same top-end power with an MS1 as you can with a Hydra or an MS3. The core differences lay in idle emissions, idle stability with A/C, etc.
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Were you running this turbo elbow in your pull?
![](https://www.miataturbo.net/attachments/dynos-timesheets-21/23106-1999-forged-bottom-fm2-w-ms1-20110501172621740.jpg?dateline=1313773743)
Getting a true 3" exhaust made will help you out. The cast 90 thing above will hurt.
but you still need a bigger turbo.
Edit.... also that elbow going into the cheated bend at the flange followed by a cat?
![](http://img830.imageshack.us/img830/8452/20110423131812114.jpg)
Your numbers are good for your setup.
![](https://www.miataturbo.net/attachments/dynos-timesheets-21/23106-1999-forged-bottom-fm2-w-ms1-20110501172621740.jpg?dateline=1313773743)
Getting a true 3" exhaust made will help you out. The cast 90 thing above will hurt.
but you still need a bigger turbo.
Edit.... also that elbow going into the cheated bend at the flange followed by a cat?
![](http://img830.imageshack.us/img830/8452/20110423131812114.jpg)
Your numbers are good for your setup.
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Alright, compression might explain some of the lower numbers, but doesn't explain the early power drop-off.
Wonder if it's because of the comparative archaic nature of MS1 vs. more modern options.
Is the head healthy? Did you go through it at the same time you went through the bottom end?
Wonder if it's because of the comparative archaic nature of MS1 vs. more modern options.
Is the head healthy? Did you go through it at the same time you went through the bottom end?
Dynocom.
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Were you running this turbo elbow in your pull?
image
Getting a true 3" exhaust made will help you out. The cast 90 thing above will hurt.
but you still need a bigger turbo.
Edit.... also that elbow going into the cheated bend at the flange followed by a cat?
image
Your numbers are good for your setup.
image
Getting a true 3" exhaust made will help you out. The cast 90 thing above will hurt.
but you still need a bigger turbo.
Edit.... also that elbow going into the cheated bend at the flange followed by a cat?
image
Your numbers are good for your setup.
Edit: Cat is gutted lol.