Neil-NA Posted November 24, 2009 Author Share Posted November 24, 2009 hmm might give these guys a try myself soon see if mines lost much power or not, feels tight and seems to pull strong but being my first supra not really got anything to compare it to Let me know if you go down and i will come along. Quote Link to comment Share on other sites More sharing options...
Kirk Posted November 24, 2009 Share Posted November 24, 2009 (edited) the flat spot in the midrange will be down to the nur spec mate... When i had it over it seems to pull fine and didnt feel lazy like some NA's 200 at fly isnt bad for its age, there are alot worse number out there. Suppose you could get CR checked to see if theres any issues internaly, loss of compression on an NA will mean a loss of overall power Edited November 24, 2009 by Kirk (see edit history) Quote Link to comment Share on other sites More sharing options...
JamesC Posted November 24, 2009 Share Posted November 24, 2009 Cars generally lose 1-2 BHP per year anyway don't they? Losing only 20BHP in 15 years is pretty good really. What happens if you have a 1989 Micra with a whopping 55 bhp loosing 2 bhp a year? It would only have 15 bhp now Quote Link to comment Share on other sites More sharing options...
nevins Posted November 24, 2009 Share Posted November 24, 2009 youd be in trouble lol Quote Link to comment Share on other sites More sharing options...
suprasize Posted November 24, 2009 Share Posted November 24, 2009 What happens if you have a 1989 Micra with a whopping 55 bhp loosing 2 bhp a year? It would only have 15 bhp now lol! Quote Link to comment Share on other sites More sharing options...
The Raven Posted November 24, 2009 Share Posted November 24, 2009 Mine was down 15bhp Not overly fusses by the loss Quote Link to comment Share on other sites More sharing options...
Guest Suprafly Posted November 24, 2009 Share Posted November 24, 2009 As long as the engine has been properly serviced throughout it's lifetime it shouldn't loose any power at all, from the factory it should actually be down on power until it's properly been run in. I'd change the entire ignition system ie rotor arm, dizzy cap, leads, plugs etc so you can be sure of a good lean burn then get it back onto the rollers. Quote Link to comment Share on other sites More sharing options...
Kirk Posted November 24, 2009 Share Posted November 24, 2009 As long as the engine has been properly serviced throughout it's lifetime it shouldn't loose any power at all, from the factory it should actually be down on power until it's properly been run in. I'd change the entire ignition system ie rotor arm, dizzy cap, leads, plugs etc so you can be sure of a good lean burn then get it back onto the rollers. all been done minus the rotor arm as it was fine Quote Link to comment Share on other sites More sharing options...
Abz Posted November 24, 2009 Share Posted November 24, 2009 As long as the engine has been properly serviced throughout it's lifetime it shouldn't loose any power at all, from the factory it should actually be down on power until it's properly been run in. I'd change the entire ignition system ie rotor arm, dizzy cap, leads, plugs etc so you can be sure of a good lean burn then get it back onto the rollers. I am pretty sure with age with you will lose some power. You have to understand that block is 15 years old, its been through rain & shine! Its been through a number of owners who have looked after it differently. On top of all that you have things like transmission & aftermarket mods (which don't always increase bhp, sometimes decrease it). An if not to make matters worse things like air humidity & the rollers used could have quite an effect on end result. I've never been to a rolling road before & on the 6th Dec will be my first one. If I can just reach over 300bhp I'd be happy, if I get anything under I will be laughed at, but I don't care as I am a better driver than you! My car pulls well & Adnan has driven it & confirms that, as long as your happy with how the engine is pulling then it should be all good. If your worry I've try getting another Supra NA to compare against. Quote Link to comment Share on other sites More sharing options...
tbourner Posted November 25, 2009 Share Posted November 25, 2009 What happens if you have a 1989 Micra with a whopping 55 bhp loosing 2 bhp a year? It would only have 15 bhp now I had a 1981 Metro, and that DID feel like it had 15 BHP! Maybe it's 1-2% per year! Quote Link to comment Share on other sites More sharing options...
Neil-NA Posted November 25, 2009 Author Share Posted November 25, 2009 I'm going to give it a few weeks of hard driving and then take it back to see if it made the slightest bit of difference. I know from previous experience on mx5s that it makes a big difference if you drive the car hard so i will see if this does the same. Not too worried about it, just didnt think it would have dropped nearly 20 hp, still feels alright Quote Link to comment Share on other sites More sharing options...
rob wild Posted November 25, 2009 Share Posted November 25, 2009 As said I really wouldn't worry about it. The last time I was at Mascrat I was talking to a GTO guy that had been to that place in Bolton for a dyno run and it was down on power compared to Hyper and another one he'd been too. Now saying that it could be that the Bolton one is accurate and the other two were reading high but that is the problem with Dyno's. If it drives ok thats the main thing. Theres quite a few NA in the NW section, and I'm sure if you pop down to a meet one of the NA owners would come out with you or take you out in theirs, just so you can see how it compares. Quote Link to comment Share on other sites More sharing options...
Neil-NA Posted November 25, 2009 Author Share Posted November 25, 2009 As said I really wouldn't worry about it. The last time I was at Mascrat I was talking to a GTO guy that had been to that place in Bolton for a dyno run and it was down on power compared to Hyper and another one he'd been too. Now saying that it could be that the Bolton one is accurate and the other two were reading high but that is the problem with Dyno's. If it drives ok thats the main thing. Theres quite a few NA in the NW section, and I'm sure if you pop down to a meet one of the NA owners would come out with you or take you out in theirs, just so you can see how it compares. Will be at the xmas do so will ask around then. Quote Link to comment Share on other sites More sharing options...
Kev_A Posted November 25, 2009 Share Posted November 25, 2009 Hmmm, the guy said it just feels sluggish. Just worried that there might be a problem. hmm, maybe due to no turbo's? only joking mate, does sound about right for the age though, were you doubting the car's performance before the rolling road? you've also got to remember there are alot of variables when doing a power run with a car, for 1, how well calibrated is the RR? Then you have things like ambient temperature, engine temp etc. As a comparison, John (hodge) ran his (now retired) N/A car on the RR the other week and made (IIRC) 208bhp Quote Link to comment Share on other sites More sharing options...
Neil-NA Posted November 25, 2009 Author Share Posted November 25, 2009 hmm, maybe due to no turbo's? Arse Quote Link to comment Share on other sites More sharing options...
Kev_A Posted November 25, 2009 Share Posted November 25, 2009 Arse Someone was going to say it, thought it might aswell be me for a change Quote Link to comment Share on other sites More sharing options...
nigelboyne Posted November 25, 2009 Share Posted November 25, 2009 Cars generally lose 1-2 BHP per year anyway don't they? Losing only 20BHP in 15 years is pretty good really. cars only loose hp when there abused and neglected not serviced properly Quote Link to comment Share on other sites More sharing options...
nigelboyne Posted November 25, 2009 Share Posted November 25, 2009 As long as the engine has been properly serviced throughout it's lifetime it shouldn't loose any power at all, from the factory it should actually be down on power until it's properly been run in. I'd change the entire ignition system ie rotor arm, dizzy cap, leads, plugs etc so you can be sure of a good lean burn then get it back onto the rollers. well said Quote Link to comment Share on other sites More sharing options...
Kev_A Posted November 25, 2009 Share Posted November 25, 2009 I think alot of people jumped on the "clarkson" bandwagon after he done that feature on Top gear with old supercars amd a mobile dyno showing how much bhp they'd lost over the years. i too am of the opinion that as long as a car is well serviced and maintained there should be no reason for it to loose bhp Quote Link to comment Share on other sites More sharing options...
tooquicktostop Posted November 25, 2009 Share Posted November 25, 2009 I will have a fully serviced 5.7 Litre Corvette at the SRR day, I will be lucky to see much more than 250 BHP ! Quote Link to comment Share on other sites More sharing options...
Neil-NA Posted November 25, 2009 Author Share Posted November 25, 2009 Not too worried about the power, it was just made out to be a bit of a problem, if others are getting similar results then all is good. Quote Link to comment Share on other sites More sharing options...
Animal Posted November 25, 2009 Share Posted November 25, 2009 My old, oil-guzzling N/A motor ran like a dream but only produced 185.4bhp on a dyno. As it's been said, if you're happy with how it drives, don't worry about it. Quote Link to comment Share on other sites More sharing options...
Kirk Posted November 25, 2009 Share Posted November 25, 2009 185.4bhp on a dyno. OUCH mine has to have atleast 200 otherwise it will be worthless to me in the future so if it doesnt make that power a rebuild will have to be performed! Quote Link to comment Share on other sites More sharing options...
stevie_b Posted November 25, 2009 Share Posted November 25, 2009 mine has to have atleast 200 otherwise it will be worthless to me in the future Why is that? I suspect that many cars on here are running less bhp than their owners think. I wouldn't be too surprised if my NA is in the high 100s as opposed to low 200s, but it doesn't affect anything unless I decide to use it for racing (not going to happen). Quote Link to comment Share on other sites More sharing options...
Kirk Posted November 25, 2009 Share Posted November 25, 2009 Cause unlike you I WILL be racing I need every pony I can get till the turbo fund is finished Quote Link to comment Share on other sites More sharing options...
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