AMR500 on a 1600cc - V2
- grelland
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Re: AMR500 planning on a 1300cc - turning into a build thread
My son wanted me to test more boost, so he made a smaller pulley for the SC ("just so that we see how it works"..."), and we made one the smallest we could, and still fit the 22mm socket in there:
Here is a shot of a pull from inside the car:
https://youtu.be/JFpSswAGeA0
Nice sound also
And after mounting it and starting a log, we achieved 11.3 psi of boost
Great fun, and it pulls really hard for a 1600cc...Here is a shot of a pull from inside the car:
https://youtu.be/JFpSswAGeA0
Nice sound also
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- buguy
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Re: AMR500 planning on a 1300cc - turning into a build thread
Awesome. Weird not to see that 3000 rpm surge though (like the turbos). What kind of trans do you have?! Sounds like a bump shift sequential!
- grelland
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Re: AMR500 planning on a 1300cc - turning into a build thread
I might be me stepping on the gas a bit weirdly...
The trans is a rebuildt IRS with all the "normal" reinforcements but a lower 3rd gear, so that I have close gap from 2nd to 3rd, but longer from 3rd to 4th. I also sue a bug-tech gear shifter that is reaaly nice and precise so I just need to flick the wrist to go from 2nd to third
The trans is a rebuildt IRS with all the "normal" reinforcements but a lower 3rd gear, so that I have close gap from 2nd to 3rd, but longer from 3rd to 4th. I also sue a bug-tech gear shifter that is reaaly nice and precise so I just need to flick the wrist to go from 2nd to third
Last edited by grelland on Tue May 12, 2020 11:58 pm, edited 1 time in total.
- grelland
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Re: AMR500 planning on a 1300cc - turning into a build thread
The added boost is a lot of fun for sure, but I will probably go back to the larger pulley for daily driving purposes The heat builds up too quickly and I go through my water/meth tank way too fast
I had the water/meth system set up to start spraying at about 6 psi, but with this new pulley that is way too late, so now it kicks in at around 3, and it helps a lot, but the way I drive, it more or less constantly sprays
I recorded some logs driving to work today and I see that I may still have some belt slippage, I build boost as soon as I open the throttle (and reached 11.7 psi this cold morning), but it tapers off. I also see that my AFR in this region is way too rich, as I have never been in that region on my map before, so it needs some tuning. Also, My TPS acts up at full throttle. When I keep the throuttle WOT, it drifts off; I suspect that is maxes out the ADC on the input channel, so I might add a series resistor or something to dampen the signal a bit.
So again: Great fun, and I am starting to get the hang of this, but it becomes more and more clear that the IAT issue with a SC is a real issue
I had the water/meth system set up to start spraying at about 6 psi, but with this new pulley that is way too late, so now it kicks in at around 3, and it helps a lot, but the way I drive, it more or less constantly sprays
I recorded some logs driving to work today and I see that I may still have some belt slippage, I build boost as soon as I open the throttle (and reached 11.7 psi this cold morning), but it tapers off. I also see that my AFR in this region is way too rich, as I have never been in that region on my map before, so it needs some tuning. Also, My TPS acts up at full throttle. When I keep the throuttle WOT, it drifts off; I suspect that is maxes out the ADC on the input channel, so I might add a series resistor or something to dampen the signal a bit.
So again: Great fun, and I am starting to get the hang of this, but it becomes more and more clear that the IAT issue with a SC is a real issue
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- grelland
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Re: AMR500 planning on a 1300cc - turning into a build thread
I tried propping the deck lid open for forcing more cold air into the engine compartment:
Still a lot of fun; drives it every day
But the temperature still rises to about 70°C when cruising at about 2000 rpm:
So I guess I will have to look into either adding fuel prior to the SC or start looking for an intercooler Still a lot of fun; drives it every day
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- Chip Birks
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Re: AMR500 planning on a 1300cc - turning into a build thread
I can't remember how Mario's test with pre fueling went. Did he see a big drop?
- V8Nate
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Re: AMR500 planning on a 1300cc - turning into a build thread
I do not believe soChip Birks wrote:I can't remember how Mario's test with pre fueling went. Did he see a big drop?
- buguy
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- grelland
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Re: AMR500 planning on a 1300cc - turning into a build thread
I have a Norwagian guy runnig amr500 in his Ghia also, but with a carb in front of the SC, and he reports a surface temperature of the SC in the 70°C range, indicating that adding all the fuel prior to the SC does not significantly lower the IAT at least. If we had E85 readily available here, I guess that would be somewhat better, but we dont. Everybody is converting to EVs (more than 50% of sales of new cars are electric here now...)
I guess intercooler is the way to go, so I will start digging into my "nice to have"-boxes in the attic, as I believe I have one lying around
I guess intercooler is the way to go, so I will start digging into my "nice to have"-boxes in the attic, as I believe I have one lying around
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Re: AMR500 planning on a 1300cc - turning into a build thread
Hi , where do you inject the water? I can not see it in the pics.
Can you control it with your ECU?
TIA
Mike
Can you control it with your ECU?
TIA
Mike
- grelland
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Re: AMR500 planning on a 1300cc - turning into a build thread
Right before the SC: And no, I do not control the water/meth through the ECU. It comes with its own controller wehere I can set the boost at which it comes on, and when it is at 100%, and it makes a linear inperpolation between the two points.
Right now I have it come on around 4 psi.
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Re: AMR500 planning on a 1300cc - turning into a build thread
Cool, thanks for the Info
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- Posts: 34
- Joined: Sat May 25, 2019 7:24 am
Re: AMR500 planning on a 1300cc - turning into a build thread
Hi, what size (cc) incetors do you use?
Tia
Michael
Tia
Michael
- grelland
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- Joined: Fri May 13, 2005 2:47 am
- grelland
- Posts: 990
- Joined: Fri May 13, 2005 2:47 am
Re: AMR500 planning on a 1300cc - turning into a build thread
Ops, forgot to check the injector size; I got busy freshening up the workspace last evening
I have started planning for the next upgrades, and the plan is to split the case, replace all bearing etc, and do a mild upgrade of the internals:
-JB200 cam from JoeBlow
-1:1.25 rockers from CB
-Mildly ported stock heads
I will also see if I can find an elegant solution for an intercoooler.
So to get a baseline before I staret modifying, have I booked dyno time on Monday next week. I hope to get a few pulls in, to see how the amount of water/meth affects power and IAT temps.
Stay tuned
Other than that, I drive the car daily, and it works really well.I have started planning for the next upgrades, and the plan is to split the case, replace all bearing etc, and do a mild upgrade of the internals:
-JB200 cam from JoeBlow
-1:1.25 rockers from CB
-Mildly ported stock heads
I will also see if I can find an elegant solution for an intercoooler.
So to get a baseline before I staret modifying, have I booked dyno time on Monday next week. I hope to get a few pulls in, to see how the amount of water/meth affects power and IAT temps.
Stay tuned
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