Williams Motorsport meets EngineMapper the great modification test mule
#122
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#124
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Harvey Smith Ported headers, and uppipe, H&S 3" Downpipe, with custom mated 3" all the way Blitz Nur Spec R. RCM Cone filter, with custom made heatshield and air feed.
RaceDynamix remap.
The only downfall of the setup is the compressor surge due to the massive air intake, so the wastegate duty is slightly lazy to prevent the surge. I think this could be prevented with a reducer somewhere in the inlet or similar.. but the VF35 is known to be surgey!
RaceDynamix remap.
The only downfall of the setup is the compressor surge due to the massive air intake, so the wastegate duty is slightly lazy to prevent the surge. I think this could be prevented with a reducer somewhere in the inlet or similar.. but the VF35 is known to be surgey!
Last edited by ScoobyDoo69; 17 August 2011 at 02:32 PM.
#126
Engine Specialist
Thread Starter
Not sure I get the wheel to flywheel power conversion to be honest, but it looks good. Do you have a dyno dynamics graph?
So other than the mods state you have no other engine modifications, or porting on the turbo etc. Are you still on the TMIC?
Graham
So other than the mods state you have no other engine modifications, or porting on the turbo etc. Are you still on the TMIC?
Graham
#127
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All the mods stated are all the mods I have. Nothing done to the turbo, still on the STi TMIC. I would love to go water injection, but I think a VF48 is next on the cards!
The wheel power conversion is done with a coast down, it has two contact patches, and both rollers do the measuring, and are resisting, hence the artificially low WHP.
Don't have a copy to hand of the dynodynamics one..
The wheel power conversion is done with a coast down, it has two contact patches, and both rollers do the measuring, and are resisting, hence the artificially low WHP.
Don't have a copy to hand of the dynodynamics one..
#129
Scooby Regular
Don't bother racking your brains over the MAHA wheel to flywheel conversion. MAHA's don't read transmission or wheel figures as you maybe used to. The important factor is that MAHA's give consistent Flywheel calculated figures against other makes of dyno's but consistently give lower torque figures. Since us in the UK normally use flywheel BHP as the "judge" it makes no great odd's in reality.
#130
Engine Specialist
Thread Starter
Don't bother racking your brains over the MAHA wheel to flywheel conversion. MAHA's don't read transmission or wheel figures as you maybe used to. The important factor is that MAHA's give consistent Flywheel calculated figures against other makes of dyno's but consistently give lower torque figures. Since us in the UK normally use flywheel BHP as the "judge" it makes no great odd's in reality.
#131
Scooby Regular
I'm long passed the stage of worrying about dyno figures! They are what they are. Coming from being the ScoobyNet "Dyno Queen" that takes alot to come to that reasoning nowadays.
I'd rather compare real world in-gear acceleration times now. Much more interesting for the real world.
I'd rather compare real world in-gear acceleration times now. Much more interesting for the real world.
#132
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As great at the dynos are, they all have their downfalls.
For me, a dyno is a comparison tool, and for that reason I will always go back to PS after mods to compare from the previous time.
FWIW when I dyno'd at 330bhp at PS I ran 13sec quarter miles with some weight reduction (back seats) then when it dyno'd at 373bhp, I ran 12.2sec quarter miles without any weight reduction, with nearly 10mph higher top speed. This for me really shows the difference in power, and the dyno just backs that up for me!
I eagerly await the results when switching to the STi TMIC, and then the results with the addition of water injection! Keep up the good work!
For me, a dyno is a comparison tool, and for that reason I will always go back to PS after mods to compare from the previous time.
FWIW when I dyno'd at 330bhp at PS I ran 13sec quarter miles with some weight reduction (back seats) then when it dyno'd at 373bhp, I ran 12.2sec quarter miles without any weight reduction, with nearly 10mph higher top speed. This for me really shows the difference in power, and the dyno just backs that up for me!
I eagerly await the results when switching to the STi TMIC, and then the results with the addition of water injection! Keep up the good work!
#133
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As great at the dynos are, they all have their downfalls.
For me, a dyno is a comparison tool, and for that reason I will always go back to PS after mods to compare from the previous time.
FWIW when I dyno'd at 330bhp at PS I ran 13sec quarter miles with some weight reduction (back seats) then when it dyno'd at 373bhp, I ran 12.2sec quarter miles without any weight reduction, with nearly 10mph higher top speed. This for me really shows the difference in power, and the dyno just backs that up for me!
I eagerly await the results when switching to the STi TMIC, and then the results with the addition of water injection! Keep up the good work!
For me, a dyno is a comparison tool, and for that reason I will always go back to PS after mods to compare from the previous time.
FWIW when I dyno'd at 330bhp at PS I ran 13sec quarter miles with some weight reduction (back seats) then when it dyno'd at 373bhp, I ran 12.2sec quarter miles without any weight reduction, with nearly 10mph higher top speed. This for me really shows the difference in power, and the dyno just backs that up for me!
I eagerly await the results when switching to the STi TMIC, and then the results with the addition of water injection! Keep up the good work!
Scooby - Did you do any 1/4 mile times in standard trim when you 1st got the car to compare your mods?
#134
Engine Specialist
Thread Starter
So I thought I'd go out for a hoon tonight after our discussions about dynos and get some real world figures and on the road AIT readings.
Ambient temperature was 11c and I was able to start each run with an AIT of 20c so this was the dyno run result:
On a dyno run in 2nd I would see the AIT rise to around 28c max. So I had a go at doing some runs all the way up the gears. Starting at 20c again I would ultimately see 48-55c at the end of a run through the gears.
I then had a go at some 1/4 mile runs, as my road dyno allows me to collect this data:
1/4mile = 12.871s @ 110.94mph (Std WRX = 14.3 PPP = 13.7)
Speeds were:
0-60 = 4.305s (Std WRX = 5.5 PPP = 4.8) +22% improvement
0-100 = 10.603s (Std WRX = 15.9 PPP = 14.1) +33%
Passing speeds were:
30-50 = 1.873s (Std WRX = 2.4 PPP = 2) +22%
40-60 = 1.584s (Std WRX = 2.6 PPP = 2.3) +39%
50-70 = 2.404s (Std WRX = 3.5 PPP = 2.9) +32%
60-80 = 2.721s (Std WRX = 3.8 PPP = 3.2) +29%
Generally I'm very pleased with the results so far, i've never done a properly timed 1/4 mile and it is only running with budget tyres currently.
Graham
Ambient temperature was 11c and I was able to start each run with an AIT of 20c so this was the dyno run result:
On a dyno run in 2nd I would see the AIT rise to around 28c max. So I had a go at doing some runs all the way up the gears. Starting at 20c again I would ultimately see 48-55c at the end of a run through the gears.
I then had a go at some 1/4 mile runs, as my road dyno allows me to collect this data:
1/4mile = 12.871s @ 110.94mph (Std WRX = 14.3 PPP = 13.7)
Speeds were:
0-60 = 4.305s (Std WRX = 5.5 PPP = 4.8) +22% improvement
0-100 = 10.603s (Std WRX = 15.9 PPP = 14.1) +33%
Passing speeds were:
30-50 = 1.873s (Std WRX = 2.4 PPP = 2) +22%
40-60 = 1.584s (Std WRX = 2.6 PPP = 2.3) +39%
50-70 = 2.404s (Std WRX = 3.5 PPP = 2.9) +32%
60-80 = 2.721s (Std WRX = 3.8 PPP = 3.2) +29%
Generally I'm very pleased with the results so far, i've never done a properly timed 1/4 mile and it is only running with budget tyres currently.
Graham
#138
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We are fitting (fitted) water injection not water spray, the injection sprays a fine mist at high pressure into the inlet tract. Water spray just cools the outside of the intercooler. On my rally car we found the water spray (to the front mount) made no difference but the injection dropped temps by approx 30deg.
#139
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What pump are you using..... I remember sometime ago the Aquamist pumps were a tad unreliable.... not what you want.
Have things changed now?
Have things changed now?
#140
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It's an aquamist pump, I havn't had any problems since it's been on the rally car. This is only a trial on the WRX, we don't plan to run it all the time as it's not really a day to day option for most owners.
#142
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WOW pretty much most things I have planned for my bug wrx so this the perfect read, just a couple of Qs
1 If you ran sti pinks instead of your 750s would start up and idle be better on the standard ECU? I understand what your saying about drivability but a simtek is way out of my( most peoples ) budget/plans. are 750s a bit excessive?
2 I was hoping to see the difference between oe ported "headers" and after market 1s inc wrapped and not, any plans for this?
Im only asking cos you guys are the experts and this is what I have in mind, (already have ported oe "headers" not wrapped fitted) and wasnt planning on changing them TBH.
BTW great job and I think a thanks from all us Snet members is in order lol
also on a side note EM are you mobile? Im fitting everything my self and dont fancy driving too far for a map ......
1 If you ran sti pinks instead of your 750s would start up and idle be better on the standard ECU? I understand what your saying about drivability but a simtek is way out of my( most peoples ) budget/plans. are 750s a bit excessive?
2 I was hoping to see the difference between oe ported "headers" and after market 1s inc wrapped and not, any plans for this?
Im only asking cos you guys are the experts and this is what I have in mind, (already have ported oe "headers" not wrapped fitted) and wasnt planning on changing them TBH.
BTW great job and I think a thanks from all us Snet members is in order lol
also on a side note EM are you mobile? Im fitting everything my self and dont fancy driving too far for a map ......
#144
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WOW pretty much most things I have planned for my bug wrx so this the perfect read, just a couple of Qs
1 If you ran sti pinks instead of your 750s would start up and idle be better on the standard ECU? I understand what your saying about drivability but a simtek is way out of my( most peoples ) budget/plans. are 750s a bit excessive?
2 I was hoping to see the difference between oe ported "headers" and after market 1s inc wrapped and not, any plans for this?
Im only asking cos you guys are the experts and this is what I have in mind, (already have ported oe "headers" not wrapped fitted) and wasnt planning on changing them TBH.
BTW great job and I think a thanks from all us Snet members is in order lol
also on a side note EM are you mobile? Im fitting everything my self and dont fancy driving too far for a map ......
1 If you ran sti pinks instead of your 750s would start up and idle be better on the standard ECU? I understand what your saying about drivability but a simtek is way out of my( most peoples ) budget/plans. are 750s a bit excessive?
2 I was hoping to see the difference between oe ported "headers" and after market 1s inc wrapped and not, any plans for this?
Im only asking cos you guys are the experts and this is what I have in mind, (already have ported oe "headers" not wrapped fitted) and wasnt planning on changing them TBH.
BTW great job and I think a thanks from all us Snet members is in order lol
also on a side note EM are you mobile? Im fitting everything my self and dont fancy driving too far for a map ......
Yes I would expect the STI injectors to idle better, Graham will have a better responce to this question but the reason for fitting the modified ones was to test/prove our own components whenever possible/practicle.
On the header front I believe Harvey is donating a set of His ported headers along with a matched up-pipe to test. I obviously don't want them to work better than my headers but we will show the results whatever happens.
I know that many owners see the Simtek as a big outlay, but it really does make a huge difference to every aspect of the performance.
Yes Graham is mobile and we are both based in North Wales (Flintshire) so not too far from you.
Andy
#146
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Thanks for the positive feedback, the plan is to test the things that most owners do as they upgrade their cars, along with the odd 'alternative' as we dream them up.
Yes I would expect the STI injectors to idle better, Graham will have a better responce to this question but the reason for fitting the modified ones was to test/prove our own components whenever possible/practicle.
On the header front I believe Harvey is donating a set of His ported headers along with a matched up-pipe to test. I obviously don't want them to work better than my headers but we will show the results whatever happens.
I know that many owners see the Simtek as a big outlay, but it really does make a huge difference to every aspect of the performance.
Yes Graham is mobile and we are both based in North Wales (Flintshire) so not too far from you.
Andy
Yes I would expect the STI injectors to idle better, Graham will have a better responce to this question but the reason for fitting the modified ones was to test/prove our own components whenever possible/practicle.
On the header front I believe Harvey is donating a set of His ported headers along with a matched up-pipe to test. I obviously don't want them to work better than my headers but we will show the results whatever happens.
I know that many owners see the Simtek as a big outlay, but it really does make a huge difference to every aspect of the performance.
Yes Graham is mobile and we are both based in North Wales (Flintshire) so not too far from you.
Andy
getting the walbro nxt month
#147
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I've lost track of the to do list but given the arrival of Racing Logic coilovers a back-to-back with the BCs would be interesting given they sit in the same price bracket. Specifically it would be good to compare what comes in the box (top-mounts, lengthened adjusters for the rears etc) and what is extra and also how the standard spring ratings compare for both everyday and track use
#148
Engine Specialist
Thread Starter
Sorry about the lack of updates for a while, I've been crazy busy this week, what with my September special offer and getting various cars ready mapped for competition this weekend!
Anyhow I've done the aquamist test and a couple of other bits and will gather the data together early next week and post about it all.
Leeturbo, pinks would be ideal for this setup. I wanted to test the validity of modified injectors on the newage cars. I've already mapped a number of cars that have the earlier type side feed yellows which have been modified with very unimpressive results. So in short, 550 pinks are ideal and the original ECU would run and drive as standard on these injectors. It just doesn't cope as well with much bigger injectors. The Simtek change was purely on the basis of a back to back, with again very impressive results. Response considerably improved which was nothing to do with the injectors. So just a good all round test to do, but no need to go this route unless you start to reach the ECUs standard MAF/injector tune-ability limits etc.
We are going to do some more header tests. E85 and other mix's of fuel have their limitations on this sort of setup. However E85 is really a gasoline/meth mix anyway, but yes could be worth a try. I'm debating on whether to return it to v-power, or perhaps try different mixes of fuel. I think I would like to try the main brand fuels and even a 95 vs 99 to see what sort of power loss it actually is and how much ignition I loose, (I have a fair idea but obviously this thread is all about tangible results).
Keep watching for more info!
Graham
Anyhow I've done the aquamist test and a couple of other bits and will gather the data together early next week and post about it all.
Leeturbo, pinks would be ideal for this setup. I wanted to test the validity of modified injectors on the newage cars. I've already mapped a number of cars that have the earlier type side feed yellows which have been modified with very unimpressive results. So in short, 550 pinks are ideal and the original ECU would run and drive as standard on these injectors. It just doesn't cope as well with much bigger injectors. The Simtek change was purely on the basis of a back to back, with again very impressive results. Response considerably improved which was nothing to do with the injectors. So just a good all round test to do, but no need to go this route unless you start to reach the ECUs standard MAF/injector tune-ability limits etc.
We are going to do some more header tests. E85 and other mix's of fuel have their limitations on this sort of setup. However E85 is really a gasoline/meth mix anyway, but yes could be worth a try. I'm debating on whether to return it to v-power, or perhaps try different mixes of fuel. I think I would like to try the main brand fuels and even a 95 vs 99 to see what sort of power loss it actually is and how much ignition I loose, (I have a fair idea but obviously this thread is all about tangible results).
Keep watching for more info!
Graham
#150
Engine Specialist
Thread Starter
I'll be doing a bit of both, but from the face of it, it won't matter which I will be using, as both will produce very similar results.
Graham
Graham