herbiemercman

Hi Swampy, The problem is not when you are moving due to the air flow you mentioned, the problem is when you stop, the ambient temperature rockets up and there is no air flow, also a black car in summer time and traffic jams are bad for residual heat.. The Supra's have feathering fans but rarely come on. Baffles only stop radiated heat, they do nothing in ambient temperature situations. My battery is now well protected, prior to the NAT Conversion the batteries always lasted 5 to 7 years, the NAT apparatus and engine power carries much more residual heat.Herbie.

Thanks Dunk, I had not heard of this process. Herbie.

What is flocking? Herbie.

Hi Guys, There is definatly a learning curve in the months and years following your NAT Conversion. Some problems present themselves in a way where you can see quite quickly what is wrong and what you have to do to fix it. This was not the case with "battery cooking", i investigated and found out after 2 years and fitting my third new Bosch battery that there is a straight line graph on the batteries life expectancy related to the ambient temperature where the battery is located.The first battery failed in 8 months and the second one in 14 months, all electrical possibilities were eliminated like charging, shorts, etc. There were other pointers for the post NAT elevated under bonnet temperatures, the the starter relay failed and i did not know it had an overheat cut out built into the circuit, the replacement did not have the cut out. The other issue was the master brake cylinder overheating and i had to make a baffle to protect this and the sound insulation on the bulk head it was radiation from the exhaust downpipe. So i fitted two louvers one directly above the battery and the other one above the conical air intake filter, when you stop the engine after a blast the heat pours out, the bonus was they looked good.However i realized the louvers would only reduce the cooling time and not the battery temperature itself, which i was monitering with a surface pyrometer. So I constructed a sheet aluminium box, with a hinged lid and lined with ali foil coated ceramic board. This dropped the battery temperature considerably and i am confident now that the problem will be solved. Herbie. 20200405_140031.jpg (637.7 KB) BON.&BUMP. LOUVERS.2019.jpg (630.8 KB)

Hi Noz, I don't know i was only 7 years old, still had the marks on my face from the iron railings at my infants school where my mum used to breast feed me at play time.. Herbie.

HI Dudes, I cannot think of a worse reason, but all the roads in my area are like i remember as a boy, to see the M61, the M6 and the M65 so quiet. The country B roads here are what you would dream of for a bit of real driving. The chance of going for a run now are a bit risky as plod will not think you have a dog or some shopping in your car. Have any of you had a sneaky blast? Herbie.

Hi Dudes, I am trying to find out what trans axle diff ratio Toyota fitted to my car, i looked at the data plate riveted to the offside wing under the bonnet, and it just gave W58/ A0IB. I know the W58 is the gearbox, so is the AOIB the diff ratio? or may be it is the fact that i have a LSD, (limited slip diff). Herbie. DATA.PLATE.03.04.20.jpg (644.4 KB)

I need to change the title of my thread to "How Will CoronaV-19" affect old Supra owners? If i was 20 years older i would be confined to quarters, i just have to stay in with a bad back, (the front is OK),and i have a garage full of Stella. Herbie.

David Beckham was asked on a TV show what would he do if a bird sh--t on his windscreen, he said i don't think i would go out with her again. On a more serious note, IMHO, (in my honest opinion), this virus gets its power from its ease to spread on all surfaces and then most of all, it shuts everything down, if you study "Maslows Needs Hyrachy", where man needs food water and air to breath,and just sits in his cave, then lots of people around the globe are becoming isolated, like Maslow, hoping the water supply, the gas supply and their TV sets stay on. We have never experienced anything like this before and it is showing how vunreble we are, may be overpopulation and globalization are now showing results ? Herbie.

Hi Dunk, Dito, I am waiting for a spine op, but feel sure the dreaded lurgy, (con-v 19), will step in, and all non life threatening ops will be cancelled. This thing has no borders and the only things that are immune are the bats in that "shit Hole" in China. Herbie.

Many thanks guys. Herbie.

Hi Guys, Has anyone got a RPM to speed graph for the 58 manual 5 speed box. ? Herbie.

Wow, I thought i was going to be the odd one out! I have to admit i got scared in the end and used to get little dream nightmares, it was always of me hitting a furniture van side on and the deffening noise. Also in the IOM when you have been on the ferry all night next to the bar, then the first ride around the island used to get silly, it is a thing i would never do in a car. Herbie.

My grandson had an easy fit noise reduction baffle on his Subaru WRX Impretsa, it was well designed as you could just push it in and just turn it 20 deg and it locked in, just like a "bayonet" fitting. The car also had two MAPs for different octane fuels, not sure if this also assisted the exhaust baffle? Herbie.

Hi Dudes, I was just wondering if there are any "knee down" ex big biker boys out there? I started a club some years ago, i was chairman and the club, BBC (Baxi Biker's Club), grew to 42 members, 40 men and 2 women, all the bikes were the big sports jobs. Baxi was the biggest domestic heating company in Europe, and the biggest Partnership, many of my pier group of Directors and Managers frowned on the BBC as any casualties would keep their employee/partner away from work. The biggest turn out was 36 members on a run to the Lake District, 40 miles from Bamber Bridge to Lake Windemere. Unlike our Supra bike replacements we did not suffer from the speed "sniper vans", as some of you will know there was no front number plates, also black PVC tape could be found in some of the member's pockets. The two most popular runs we had was the IOM (Isle Of Man), for the TT annual races, the other popular run was Bamber Bridge, where Baxi was located, to Edingborough, all A-roads, and we used to call it our mini TT circuit. Anyway nothing lasts for ever and after 8 years we sort of let it melt away, my brother and i, bought Supra's, he got the TwinTurbo auto and i got the NA manual, my brother's car was tuned and in the first year we took it to the TT Races and he was blowing bikes, at the time these cars were little known. I have never taken my converted NAT which would be faster than his Twin Turbo was, but it is going on the "bucket list". My Supra was to my mind, my next big bike, i got the buzz, and most of all i did not get the mega apprehension, which most of us suffered prior to an outing. The biggest hazards were the actual speeds and trying to keep up in a pack of riders, no one wanted to get stuck behind a truck on narrow roads and fall back, so you risked very near misses, we had quite a few major incidents but most thankfully, NO fatalities. So any of you guys been down this road.? Herbie.

Cheers Noz, Looks like i got there in the end, just got to parcel up my RS badge now and mail it to Adam, RS (Rallye Supra) models are quite sought after. lol. Herbie.

Thank you Burna and Adam. Herbie.

Hi guys, I have been a right prick here and unwittingly started "a storm in a tea cup". My previous readings were on the day i fitted the AFR and it was just basically close to where i live and to be honest i only caught a glance of the highest reading of 15 to 1 for a split second. Today i went on the M65 and it was very quiet to carry out a more meaningful test run, here are the readings AFR's recorded: COLD START: 14 TO 1. ENGINE TICK OVER UP TO TEMP AND OIL TEMP AT 90DEG.C: 14.8 TO 1. HALF THROTTLE 5TH GEAR: 90 MPH ISH: 12.5 TO 1. BOOT DOWN SILLY SPEED: 11 TO 1. The readings held steady for for a while at least one mile or so at high speed. The 15 to 1 occurs momentarily when you are de-cellerating and this is where the gauge starts to fluctuate a little, when you shut off completely there are no readings which is understandable. So thank you for the posts and join me in my celabration, i must admit i could not wait this morning after what Noz told me about the leaning out, to carry out a proper test run. Herbie.

Hi Guys, It took me 3 years from the NAT Conversion being fitted for me to realize the importance of fitting an AFR Gauge, which i carried out yesterday, it is a "AEMelectronics" wideband which provides quantatative data, digital and LED. It was £200 and comes with the advanced Bosch sensor. Basically the Converter, "Rocket Dog Racing" told me that a boost gauge and an AFR were a "nice to have", but not essential as he was happy to let the MAP provide the protection required. So 3 years on and i now have a thicker cylinder head gasket and a "Jap Parts" 3" free flow exhaust system, i received different views as to how the two changes could affect my MAP, this included the opinion from the NAT Converter. After experiencing a loss of boost caused by a wide split in the boost pipe and following this a sticking waste gate, again loss of boost, i managed to get a full performance recovery to the engines power output, circa 415 BHP at 1.2 Bar, smooth running and bags of power. Noz and one or two other members, from their experience and know how, convinced me that an AFR gauge is a must, their hypothesis was that if something in the fueling systems control, sensors, continuity problems, poor quality fuel etc caused the engine to run lean, eg: 18 to 1. air to fuel mixture, then the aluminium in the combustion chamber could warp or melt, which would be a worse case scanairio than the cylinder head gasket failing, which is an expensive difficult high tech job to do. The engine runs from a cold start at 12 to 1, and then cruises at 14.5 to 1, and on full boost circa 11 to 1, it is spot on and i enjoy knowing that this important condition is running correctly. Herbie. AEM.AFR (1).jpg (446.6 KB) AEM.AFR (2).jpg (441.3 KB) AFR Sender.jpg (564.0 KB)

Hi Guys, I fully serviced my front brake calipers 12 months back, recently i had to remove the front wheel and i noticed that it was badly binding, hard to turn. I mentioned this to my friend who is a mechanic that helped me to replace my head gasket recently, he said when you serviced the brakes did you clean and grease the slide pins? I was not aware what these did, once you know it is obvious, they allow the pads to slide on and off the discs. When i did the strip down i found the pins were completely seized, had to use heat and WD40 to free them off, i polished them up and applied the HT ceramic grease, there are two flats on the pins to retain the grease. It is hardly surprising that this happened considering i have owned the car for 23 years. I have done this thread as i am sure there will be other members who were not aware of this sit:cool:uation. Herbie.

WTFAW, This means (where the fu-k are we), the abbreviation came from a tribe in Borneo who are only very small and when they are running in long grass they shout WTFAW. Hope our Irish friend does not mind us high-jacking his thread. With reference to using Google, that's a balls ache when you are reading a posting, also a lot of the abbreviations and accronims are parochial to this club, not common knowledge to many Club members. Anyway thanks for spelling them out and it looks like Adam has declined Noz's nomination. Herbie.

Hi Dudes, I enjoy the tuning technical postings but have difficulty with acronyms and abbreviations, i appreciate these are very useful for the guys who are well up on the subjects discussed. Is there anywhere on the Club site where you can look up what they are? or alternatively you could spell it out in brackets, AFR ( air fuel ratio). I am aware that the system high lights in blue some abbreviations. Meanwhile what are these ? FFIM, DBW, FMIC, HTM, TB. Many thanks . Herbie.

Very well put Scooter, good analogies.

Hi Scooter what is Aristo?

Great, the Irishman has got this ball rolling, well done. I am so glad i have my NAT, it has all the best bits now and the driving is awsom and thanks to Noz who helped me a lot, i just need to take my RS badge off the front of the car now. lol. Herbie.