Simtek to Solaris
From experience (and i leave the mapping to the likes of Pat who know what they are doing) a flat boost curve gives a far smoother driving experience when on the road. I am being fairly simple here (as it's the way i think when it comes to cars) but when you have a car capable of 400+, every 0.1bar change of boost, can change the power level by quite a significant margin!
For example, mine at 1.9bar made 562bhp, at 2.1bar it made 592bhp. You can feel the difference driving it. So crudely on my car 0.1 equated to a 2.5% increase. From memory, the torque difference was even more.
Lower down the boost curve, again from memory, 0.1bar change made an even bigger change. My car a few years ago made 400 at 1bar.
Now imagine you have fluctuating boost control, lower down the power scale, and you suddenly get bigger percentage increases in power and torque!
Translate that to a road feeling and you get an awful drive.
For example, mine at 1.9bar made 562bhp, at 2.1bar it made 592bhp. You can feel the difference driving it. So crudely on my car 0.1 equated to a 2.5% increase. From memory, the torque difference was even more.
Lower down the boost curve, again from memory, 0.1bar change made an even bigger change. My car a few years ago made 400 at 1bar.
Now imagine you have fluctuating boost control, lower down the power scale, and you suddenly get bigger percentage increases in power and torque!
Translate that to a road feeling and you get an awful drive.
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From: Slowly rebuilding the kit of bits into a car...
Thanks Stephen, that makes sense (even to me !)
Mine is struggling to (smoothly) control it's MD321H, and as you say it "feels" less than pleasant) std ecu at present....
But Simon (JGM) knows it is work in progress till it's done, (if ever !)
dunx
Mine is struggling to (smoothly) control it's MD321H, and as you say it "feels" less than pleasant) std ecu at present....
But Simon (JGM) knows it is work in progress till it's done, (if ever !)
dunx
Last edited by dunx; Jun 20, 2009 at 06:08 PM.
You running Simtek dunx?
Solaris on mine is a flat line at 2 bar - with the take off for the boost control now at the centre on the manifold. The previous siting of the vacuum take off for the map sensor did pulse a little.
Solaris on mine is a flat line at 2 bar - with the take off for the boost control now at the centre on the manifold. The previous siting of the vacuum take off for the map sensor did pulse a little.
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From: 700+ WR1 aka The Vuvu Zela...10.6 @ 136 weighing 1370kg....say no more....
It will be interesting to see how the Solaris plays when it gets mapped on the new build in a couple of weeks time.
Last edited by JP4; Jun 19, 2009 at 03:09 PM.
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From: 700+ WR1 aka The Vuvu Zela...10.6 @ 136 weighing 1370kg....say no more....
No probs m8 - feel free Banny seeing you are not too far from Chy's. Can you please also do me a favour by taking a pic of the whole dash as I need to decided where the ETG will go! PM this one to me fella
Last edited by JP4; Jun 19, 2009 at 03:54 PM.
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Not personally had any problems with SimTek boost control when using a decent 3 port solenoid, Turbosmart solenoids are nice and cheap and do the job perfectly.
Ok thanks mate, will post up closer to the time to figure out where most people have there new added toys fitted . feb really seems a long way off 
thanks
Scoob is with Chy at Pennine currently being finished off so sadly will not be able to take pics. Both swithes are side by side on the ashtray lid itslef. This way it's nicely tucked away but still fairly easy to operate. Ofcourse, this means that your astray becomes a no entry really as the wiring is from the inside. I have a couple more switches to come on so will need to think where these will go!
It will be interesting to see how the Solaris plays when it gets mapped on the new build in a couple of weeks time.
thanks
Scoob is with Chy at Pennine currently being finished off so sadly will not be able to take pics. Both swithes are side by side on the ashtray lid itslef. This way it's nicely tucked away but still fairly easy to operate. Ofcourse, this means that your astray becomes a no entry really as the wiring is from the inside. I have a couple more switches to come on so will need to think where these will go!
It will be interesting to see how the Solaris plays when it gets mapped on the new build in a couple of weeks time.
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From: 700+ WR1 aka The Vuvu Zela...10.6 @ 136 weighing 1370kg....say no more....
No probs m8. Hopefully Banny will be able to take a pic or two when he visits Chy's place in due course. Seeing the switches on pics will be better than trying to visualise by description.
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From: 700+ WR1 aka The Vuvu Zela...10.6 @ 136 weighing 1370kg....say no more....
Looks like a couple of diamonds!!
Cheers Banny - got the PM - its making me miss her more now! 
Hope Chy didn't reveal the deviation from the original plan on my build!
Cheers Banny
- got the PM - its making me miss her more now! Hope Chy didn't reveal the deviation from the original plan on my build!
So got a couple of sprints behind me now on the solaris,3 first in class and 2 class records.The car pulls much better and alot smoother,managed a 1.95 60ft start on road tyres on smooth tarmac which is completely different to drag strip tarmac.And at Aintree managed a 47.05 which was a new record again for me.Bring on more power!
