Vaughany

This is how I work it out. Working out Flywheel power rhhp / 80% * 100% = flywheel bhp 340 rhhp / 80 ( after 20% transmission loss) *100 = 425bhp working out rhhp flywheel bhp / 100 * 80 (transmission loss) = rhhp 425 / 100 * 80 = 340 rhhp This seems to be best way i found and gets the same results as cliff. The real question is what are the transmission losses, 20% or 15% being 340rhhp can either be 400 bhp (15% transmission loss) or 425 (20% transmision loss) at the flywheels so there is quite a difference of 25bhp. Now just think if a Supra is pushiing out 750 at the hubbs, their flywheel bhp will either be 938bhp (20% loss) or 882bhp (15% loss). A difference of 56bhp which is quite significant when you are trying to boast a 900+ bhp. But saying that I would be happy with 750 at the hubs! hell i would like 400 at the hubs. Keep saving keep saving I THINK.

Maybe my workings out are differnt but I make 246bhp at the wheels 307.5 at the flywheel. My working out is as follows 246 at the wheels is 80% of the flywheel power (20% being approximate transmission losses) so surely you divide 246 bhp by 80% to work out what 1% of the flywheel power would be then times this by 100% to work out total flywheel power. i.e 246/80 = 3.075 * 100 = 307.5bhp at the flywheel. Do you agree?

Thanks Jake

Cheers Ian for the support, I agree with you, everyone has to start somewhere and that is one of the advantage of the Forum, it gives advice to people who dont know as much and usually gives links that offer step by step guidelines. Dude, when I say servicing I am talking about oil changes, changing the ATF, checking and changing the brake pads. All of which I had never done on a Supra until I watched a specialists, got advice, quizzed them and done it myself. I am on a learning curve but feel confident on doing the basic servicing and safety checks. I admit more complicated matters I would leave to a specialists but I am not going to pay someone £50 a hour to change the oil for me. Even the specialists had to start somewhere, dont get me wrong when I do something for the first time I will always have a specialists there for guidance and to ensure it is done correctly. I agree with you that the Supra is a specialists piece of machinery and I definitely dont want to blow it up or risk injuring others. I hope you see my point.

I am a J-Spec TT, Cheers I will check the link Thanks

Jake thanks for the info, I am running Trust Racing plugs Number 8 and they have been on the vehicle for 7000 miles. I thought I new where the plugs were situated but on investagation, I haven't a clue. I took the plastic cover off that covers the pulleys etc as I thought they would be situated under there but I could'nt see anything obvious unless they are well disguised. can you shed some light on this for me aswell. Thanks

I am doing all my own servicing, well the bits I feel comfortable about doing myself. I was wandering how often should I been changing my spark plugs or is it the case of them checking them regularly and replacing them when they looked f##ked. If this is the case what am iL ooking for that will determine if the plugs are in good or bad order. Thanks

Cheers Ed, i spoke to Kevin from Envy, there is a little rewiring to do aswell I think but I will have to confirm this. Nice car by the way, looks good. Cheers

I have just purchases a set of clear indicators from Envy ( the ones Under the Headlights) to replace the horrible orange ones. They have not arrived yet but I am expecting them tomorrow. Can anyone tell me are these a pain to fit and do I require any extra fittings etc. They are going on a 1994 J-Spec TT. Thanks

Maybe we need to set up a Poll to find out exactly what the members are running with regards to air Induction. The categories could be as follows. 1) Standard Air box and Filter 2) Standard Box and Uprated Panel Filter 3) HKS SPF Induction Kit 4) Blitz Sus Power 5) Apexi Power Intake 6) K&N Induction It might be interesting to see what we are all running. I was running a HKS Kit but after this thread and reading the link to the Induction Kits I have now ordered a Apexi Kit as this seems to have got the best results when tested. I am wondering how many members are running the poorer kits such as the HKS and Blitz Kits just because of the name, suppossed hype or a recommendation from a Tuner/Trader. Not to point any fingers but I was recommended the HKS kit by a trader and results show (if true) that these are the worst kits out of the 4 market leaders in Induction Kits. It just makes you think who you can trust, is the advice we get sound advice or is it all about pennies in the bank. Dont get me wrong I have got my own mind and I make my own decisions but when an expert tells you that this is the kit to have, I thought okay I will believe him, they know best. If this is not the case, it sort of questions the whole point of having the forum. If I cant trust the traders, should I take anything I hear/read as the truth or is it just someones opinion and not necessarily fact.

Alex I agree with you, Stock is best for your engine but saying that stock boost is best for your stock turbos aswell but we are all trying to gain more boost (1.2Bar). Looking at the results on the Induction Kits, the Power gains are impressive (13 BHP). What are the gains from a uprated Panel Filter in the stock box?

Hi Mate Yeh I have read this but maybe I am abit sceptical and it still does'nt answer why some UK Tuners are still recommending them and why alot of the Big Supras/Skylines are running them. If they are so BAD why have they got them on there cars. The debate goes on!

I have been running a HKS SPF for the past 9 months on my J-Spec TT. Every so often a thread pops up saying how bad these filters are at filtration but the question never really gets answered. ARE THESE FILTERS BAD FOR THE SUPRA and if so why are alot of people running them and various tuners recommending them. I am trying to get a honest answer so I can decide whether to put back on the standard box with an uprated panel filter, keep the HKS Kit or replace this with a Apexi Kit that tests have shown to have better filtration. The HKS kit that I have has its filter replaced every 7000 miles and I dont drive it to often looking to cover about 10000 miles per annum. How many people on here are running the HKS SPF, have you experienced any problems due to this kit? What am I to do, I am hoping the Tuners/Experts will get involved and finally put this GHOST to rest. Thanks

I woud l have to agree, it does'nt matter about the age. It is about the type of owner. I think the younger Supra owners have probably done the whole Max Power thing and have now decided to progress to a real sports car. Hopefully if you were given the wisdom to pick a Supra you were also given the wisdom to respect it, look after it and not act like an idiot. My previous car was an Astra 2.2sri that I spent about £6000 on for measley gains and to be honest it was still a poor attempt at a sportscar. I thank the person who mentioned Supra to me as I had never really given it much thought before. However after he mentioned it to me and I did abit of research. It was definiteltythe car to have, at the end of the day where can you buy a car with blistering performance and looks so reasonably priced. I paid £12000 for my 1994 Supra TT GZ, some people (not supra owners) may think that is alot of money but you will struggle to find a car that matches the Supra and at £12000 was a bargain to me. I am 30 now but hell if I could of afforded it I would of bought a Supra years ago and saved wasting all the money on other cars. At the end of the day, Japanese Cars are very popular now due to looks, performance, reliability etc, and if you going to buy a Jap car and you can afford it buy the best. So go easy on the young guys for owning Supras, all it means is they realised sooner than I did just how fantastic the Supra is. Bloody Hell, that was long, I better go to bed, us old guys dont have as much energy as you younger ones.

Thanks for the info, 5 litres it is then - cheers

Hi Everyone My Soop is due an oil change, I was going to use Millers 5w50 XFS Fully Synthetic. This oil should be okay for the Soop should'nt it? Please coorect me if I am wrong but for an oil change it is usually about 6 1/2 litres required? Thanks

Thanks Terry for the advice, I think I will leave the voltage as it is for now. Thanks again

Thanks for the info guys. Unfortunately I did not get any instructions but the model I have is the Walbro 341. I think I will get someone else to do the fitting for me. I will just watch and learn to be on the safe side. Paul Could you please state the advantages of running the fuel pump with the 12v mod. At the moment then is the the standard pump running on 9v. Thanks

Thanks for the info, a trip to the paint shop is required

Hi everyone, this is to all you paint experts. tAt the bolney meet, the pucker Supra that was in the Car park, the one will the Gold Blitz Alloys. In the Engine Bay I noticed that the owner had painted the fuse covers and this looked excellent. my question is can you use any standard paint that is suitable for plastic or do I need use a special heat resistant paint due to the heat generated under the bnnet. In either case, which is the best paint to use and where can I get it from. My colour code is 199 - silver. Thanks

I have purchased a Walbro Uprated Fuel Pump for my J-spec TT. This is the start of my next stage of modifications which will include * Cat Replacement pipe for 1st Cat * Restrictor Ring * ERL Aqamist Water Injection system (to complement my CW SMIC) *FSE Fuel pressure Regulator My Soop so far has 2nd Cat removed, Nurspec R, Induction Kit, Uprated Plugs and CW SMIC and is running about 0.96 bar of boost pressure. My question is can I fit the Fuel pump immediately or by fitting this now without the other proposed mods, will the car suffer from any adverse effects such as running rich etc. Is it best to fit this when I have all the bits to fit aswell, my car has been on the Dyno with its current mods and the fuelling is fine. So should I fit the pump or not, if so is this an easy job and where exactly is the Pump situated. Thanks

Eyefi Thanks, I will do it tomorrow.

I think I have over filled my Automatic Transmission Fluid. I read on the forum that if this is over filled, the gear box dumps it from the nearest exit and is noticed with a trail of white smoke behind you. Well I was driving home from work (about an hours drive) when I noticed a trail of white smoke. As I have just topped up my Auto fluid the day before as it was very low. I assume this is what it is, when i checked the level before driving home the level was just abit over so I didnt think to much about it. However after the drive the level was well over due to the car being well drivenand the fluid being hot. My question is, Have I done serious damage or is it just a case of draining some of the access fluid from te sump. To drain this, I take it that the car does not need to be on etc. Can I drain abit of auto fluid from the sump when the car is cold or does the car nedd to be idling and in neutral ( like you do for Auto fluid level check) Thanks

Syed Thanks for the info

Alot of people take tyre pressures when the tyres are hot and cold as this shows an alteration in the tyre pressure. Just out of interest, am I right in saying when the tyre are warm, the tyre pressure is less (hot air, less dense) or is this the other way around. Whichever way it is, if the manual states 36psi, is this pressure for when tyres are warm or cold.