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| Home > A-Series EFI / Injection > EFI Testing - Dyno Day 6: 1.5:1 Ratio rockers | |||||||
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Site Admin  9403 Posts Member #: 58 455bhp per ton 12 sec 1/4 mile road legal mini Sunny Bridgend, South Wales |
5th Aug, 2019 at 11:52:54am
love it! Team www.sheepspeed.com Racing
On 15th May, 2009 TurboDave said:
I think the welsh one has it right! 1st to provide running proof of turbo twinkie in a car and first to run a 1/4 in one!! Is your data backed up?? directbackup.net one extra month free for all Turbo minis members, PM me for detials |
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 608 Posts Member #: 1106 Post Whore Hungerford, Berks |
7th Aug, 2019 at 01:49:56pm
On 4th Aug, 2019 robert said:
hey !! its not that loud  Are we talking about the car?? I know the car isn’t that loud. It sounds pathetic with the new silencer. I still get the usual “I could hear that thing coming”, but now it’s the gearbox/ drop gears they can hear screaming, not the zaust barking… *** REVISED STATEMENT: By the way, I have complete trust in Roberts Driving. Where are we at now? 52 Runs on the Dyno and apart from that unfortunate incident in Feb, all is good. Just as long as the car is strapped down with 2 RATCHET straps I'm totally comfortable being passenger to him! *** New moulds complete… 
Tonight I can honey wax ‘em and get the PVA Release agent on, ready for Carbon fibre lay up tomorrow. ’77 Clubman build thread
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 6745 Posts Member #: 828 Post Whore uranus |
7th Aug, 2019 at 02:42:21pm
I just remembered how we made tiny movements of the walls of that deign to get 9 air speed measurements per outlet to match each other for both tubes to the head .
Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM |
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608 Posts Member #: 1106 Post Whore Hungerford, Berks |
7th Aug, 2019 at 04:56:50pm
Yep, all that was back on page 4 of this thread, mid way down the page.
Edited by Graham T on 7th Aug, 2019. ’77 Clubman build thread
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6745 Posts Member #: 828 Post Whore uranus |
7th Aug, 2019 at 07:48:14pm
yes if we do a page with the 9 measurement points on it , and call that page no1 , then just make enough pages to cover the amount of inlet positions , say ,every 5mm ? Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM |
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608 Posts Member #: 1106 Post Whore Hungerford, Berks |
8th Aug, 2019 at 08:14:22am
Yes, that sounds like a plan.
Edited by Graham T on 8th Aug, 2019. ’77 Clubman build thread
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 (2)[/url] by [url=https://www.flickr.com/photos/150672766@N03/]Rod Sugden[/url], on Fli) 5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
8th Aug, 2019 at 01:29:23pm
On 8th Aug, 2019 Graham T said:
New DC Geared motor has arrived – The only 1000RPM motor I could find had to come from China. I’ve only just last night ordered a driver board for it. I opted for a dual channel driver board (Peak 5amp rating), in case it is needed for the cam positioning later on. Have you got a link for both (in case I missed it if you mentioned the exact one earlier earlier). I'll explain why once I've finished my mock-up because space is seriously limited to fit an operating mechanism for the cam chain that both keeps both sides of the chain tensioned and fails "safe" (ie, the chain can't come off or "slip" if any part of the mechanism fails). Schrödinger's cat - so which one am I ??? |
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608 Posts Member #: 1106 Post Whore Hungerford, Berks |
8th Aug, 2019 at 02:11:20pm
I never posted anything on these parts, so no, you have not missed it.
Edited by Graham T on 8th Aug, 2019. ’77 Clubman build thread
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608 Posts Member #: 1106 Post Whore Hungerford, Berks |
12th Aug, 2019 at 06:47:02pm
Well, in the end I left laying up the Carbon fibre until Friday evening.
Edited by Graham T on 12th Aug, 2019. ’77 Clubman build thread
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6745 Posts Member #: 828 Post Whore uranus |
12th Aug, 2019 at 09:09:14pm
looks blimmen spanky to me . Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM |
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Site Admin 9403 Posts Member #: 58 455bhp per ton 12 sec 1/4 mile road legal mini Sunny Bridgend, South Wales |
13th Aug, 2019 at 02:35:04pm
looks mega to me
Team www.sheepspeed.com Racing
On 15th May, 2009 TurboDave said:
I think the welsh one has it right! 1st to provide running proof of turbo twinkie in a car and first to run a 1/4 in one!! Is your data backed up?? directbackup.net one extra month free for all Turbo minis members, PM me for detials |
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608 Posts Member #: 1106 Post Whore Hungerford, Berks |
20th Aug, 2019 at 12:33:05pm
Believe me, it is not really as shiny and nice as the photo shows it, especially now I have had my filthy mits on it, shaping it and trying to remove some of the imperfections created by the paint from the mould sticking.
Edited by Graham T on 20th Aug, 2019. ’77 Clubman build thread
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 971 Posts Member #: 3228 Post Whore North of the Netherlands |
20th Aug, 2019 at 02:33:29pm
Very very impressed
Dazed and Confused.... |
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608 Posts Member #: 1106 Post Whore Hungerford, Berks |
20th Aug, 2019 at 03:38:12pm
“Persistence”
’77 Clubman build thread
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Site Admin 9403 Posts Member #: 58 455bhp per ton 12 sec 1/4 mile road legal mini Sunny Bridgend, South Wales |
20th Aug, 2019 at 04:38:17pm
amazing, keep pushing Team www.sheepspeed.com Racing
On 15th May, 2009 TurboDave said:
I think the welsh one has it right! 1st to provide running proof of turbo twinkie in a car and first to run a 1/4 in one!! Is your data backed up?? directbackup.net one extra month free for all Turbo minis members, PM me for detials |
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177 Posts Member #: 10990 Advanced Member Hornsea |
21st Aug, 2019 at 09:08:17am
On 20th Aug, 2019 Graham T said:
“Persistence” Ha, more like obsession… I have set myself a goal: I want to See 200 BHP. But I am aiming for that at a boost level of 16PSI or lower and under 6k rpm. That would be an excellent result on that psi with a well behaved motor. I am very close to that figure at 16psi but I have went 1460. It's really interesting seeing all the different engine configurations and results. This is a great topic. Well done. Roy B |
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Site Admin  15300 Posts Member #: 337 Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner & TM legend. |
21st Aug, 2019 at 09:45:12am
Really pushing the boundaries with the variable intake length.
On 29th Nov, 2016 madmk1 said:
On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else Like fuel 😂😂 |
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608 Posts Member #: 1106 Post Whore Hungerford, Berks |
21st Aug, 2019 at 01:02:11pm
On 21st Aug, 2019 burcy35 said:
On 20th Aug, 2019 Graham T said:
“Persistence” Ha, more like obsession… I have set myself a goal: I want to See 200 BHP. But I am aiming for that at a boost level of 16PSI or lower and under 6k rpm. That would be an excellent result on that psi with a well behaved motor. I am very close to that figure at 16psi but I have went 1460. It's really interesting seeing all the different engine configurations and results. This is a great topic. Well done. Roy B Thanks Roy. The way I am currently looking at my progress is: We got 176BHP for 14.7PSI and 5570RPM in July, running way rich. I estimated that the over rich running at peak power had possibly cost me around 10BHP – based on previous Dyno session results. So that MIGHT have been 186BHP for 15PSI boost. In general, the Engine makes an extra 7BHP per 1PSI of boost. So 16PSI MIGHT have got 193BHP. With the 1.5:1 rockers installed, that should push my peak power up the rev range slightly and so I’m hoping net me that extra 7BHP I want. Also we had inlet temps of 44Deg C, mainly because I was too lazy to take the bonnet of and we were in the middle of that hot spell, so hopefully the next upcoming Dyno session it will be a little cooler and I will take the bonnet off, which COULD help with power. Of course, that is just a load of might’s, if’s and maybe’s… (And if I am still short of the 200BHP I could disconnect the alternator for the run? That might gain me a couple of BHP?  )
’77 Clubman build thread
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608 Posts Member #: 1106 Post Whore Hungerford, Berks |
21st Aug, 2019 at 01:05:31pm
On 21st Aug, 2019 Tom Fenton said:
Really pushing the boundaries with the variable intake length. Can the lead screw arrangement react quickly enough to be useful though? My thought would be to use engine vacuum, some sort of reservoir to store some vacuum, then use a pneumatic cylinder in vacuum to move one way, with a spring in the opposite side for opposing motion. Fairly easy to control using a 3 port valve. Tom, I am hoping with this new DC motor which is supposed to be rated for 800RPM under load, it will move the extensions at 106mm per second: Leadscrew moves the extensions 8mm per revolution. but, that said, I have just found and bought a cheap pneumatic cylinder (dual acting) to play with. The other thought is maybe an hydraulic ram? maybe powered off Engine oil pressure with some sort of shuttle valve, as per discussed earlier with the Variable cam timing cam sprocket. With either type, position control will still be an issue and I’d probably need some type of linear encoder or Pot for position feedback. But certainly this is a possible alternative to the leadscrew actuator. Though, for proof of concept, as long as I can get this DC motor under control, this current actuation method will, I think, be fine for manual position control, at least for the flow testing. So, yesterday, after posting that I was finally going to get out with the 1.5:1 rockers installed, I realised I needed an MOT. The garage said they could fit me in in the evening, thankfully. I was a little concerned about emissions, just because I was not sure how the rockers might affect fuelling, even on tick over. But all was good. CO 3.15% and HC 218PPM, The Lambda sensors were showing 13 – 13.5 AFR when the test was being carried out. Now, I had not driven the car since coming back from the last Dyno session, so it could just me in my head, but to me there was a lot more response off boost to previous. It just felt like it pulled harder off boost. But… I have no logs. I had TunerStudio set up for “triggered logging”, based on road speed. However I turned that off at the dyno session so that we only got logs of the 4th gear pull, not all the build up beforehand. Apparently I forgot to activate it again after leaving Robert’s. So I have no clue if there are any changes required to fuelling. I did see a few areas where it was going slightly lean when glancing over at the screen, but I’ll get some logs before I start changing things based on what I thought I saw for a split second. ’77 Clubman build thread
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608 Posts Member #: 1106 Post Whore Hungerford, Berks |
4th Sep, 2019 at 07:40:07pm
Small Update
’77 Clubman build thread
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6745 Posts Member #: 828 Post Whore uranus |
4th Sep, 2019 at 08:24:24pm
oh pooh . Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM |
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Site Admin 9403 Posts Member #: 58 455bhp per ton 12 sec 1/4 mile road legal mini Sunny Bridgend, South Wales |
5th Sep, 2019 at 07:58:27pm
Don’t give up!!! I can anodise foc if you want Team www.sheepspeed.com Racing
On 15th May, 2009 TurboDave said:
I think the welsh one has it right! 1st to provide running proof of turbo twinkie in a car and first to run a 1/4 in one!! Is your data backed up?? directbackup.net one extra month free for all Turbo minis members, PM me for detials |
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1267 Posts Member #: 831 Post Whore Montreal, Canada |
5th Sep, 2019 at 09:39:31pm
Maybe you could look into making teflon sleeves out of a rod or plate so that you never have metal-on-metal sliding? Might be a bit expensive though. |
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608 Posts Member #: 1106 Post Whore Hungerford, Berks |
6th Sep, 2019 at 09:29:33am
On 4th Sep, 2019 robert said:
oh pooh . Yes, My words were slightly strong than that, but the sentiments were the same… On 5th Sep, 2019 Jimster said:
Don’t give up!!! I can anodise foc if you want Not giving up Jim. I had a sulk yesterday, but today I am planning how to remake that melted part. Originally they were machined as a pair, but I will have to try to get the new bracket correct without pairing it to the other side unit. Thank you for your very kind offer. Once I get this part mended I will be in touch. On 5th Sep, 2019 jbelanger said:
Maybe you could look into making teflon sleeves out of a rod or plate so that you never have metal-on-metal sliding? Might be a bit expensive though. Jean, this is a good idea also. For now though I think the plan will be to repair as best I can so that I can get it all anodised Then complete the work on the motor control which should tell me if anodising alone is enough. As this is experimental and I have no idea if this will even yield the result I hope for, I do not want to add extra work or costs. So once it is on the car and I see some useful results, I can then drop back to thinking on better materials/ design. ’77 Clubman build thread
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608 Posts Member #: 1106 Post Whore Hungerford, Berks |
7th Sep, 2019 at 06:11:51pm
Amazingly, I have now got that runner repair in a very short time.
’77 Clubman build thread
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