bug eye bhp estimate (lightly upgraded)
Discussion
Hi, i have a 2001 bug eye its covered 95 000 with exellent service history. Im going to have it put on a rolling road to check its running ok. But was wondering what to expect. I bought it already fitted with a full ninja 2 exhaust system with all cats removed and a k&n induction kit. it boost at the standard 0.9 bar. so can assume it hasnt been remapped. has anyone had similar mods to theirs just wondered if it raised it much from the standard 215. It feels lively and powerful compared with a completely srandard one a drove a long while ago
If you make an extra 10-20bhp extra by going fully decat without a remap you're doing well.
After 95K miles it's unlikely your bugeye is making the normally quoted 218-220bhp with it's normal exhaust, it would have lost some power along the way with normal wear and tear over the years.
Going fully decat though will cause some overboost which may make up for some of the natural power loss, so i'd expect it to be making c.230-235 or thereabouts. The throttle/general running will feel a bit sharper as all the exhaust restrictions have been removed but that's it.
You should get a performance flat panel air filter and a remap to realise c.270-280bhp with the standard turbo and injectors. At 95K miles i would probably leave it at that.
ETA: I've just realised you have a K&N induction kit, i.e. cone filter. You really ought to get it remapped as the MAF sensor will need to be calibrated to run the induction kit and make sure it's fuelling correctly. You'd be better off going back to the standard airbox and run a performance flat panel air filter. Adding a big after market induction kit generally makes them run leaner so that added to the overboost from the decat exhaust will lead to some knocking (DETONATION) under heavy engine loads at low and high rpm.
I hope you're using at least 99RON fuel in the form of Shell Optimax or Tesco Momentum to keep DET to a minimum. You need a remap.
After 95K miles it's unlikely your bugeye is making the normally quoted 218-220bhp with it's normal exhaust, it would have lost some power along the way with normal wear and tear over the years.
Going fully decat though will cause some overboost which may make up for some of the natural power loss, so i'd expect it to be making c.230-235 or thereabouts. The throttle/general running will feel a bit sharper as all the exhaust restrictions have been removed but that's it.
You should get a performance flat panel air filter and a remap to realise c.270-280bhp with the standard turbo and injectors. At 95K miles i would probably leave it at that.
ETA: I've just realised you have a K&N induction kit, i.e. cone filter. You really ought to get it remapped as the MAF sensor will need to be calibrated to run the induction kit and make sure it's fuelling correctly. You'd be better off going back to the standard airbox and run a performance flat panel air filter. Adding a big after market induction kit generally makes them run leaner so that added to the overboost from the decat exhaust will lead to some knocking (DETONATION) under heavy engine loads at low and high rpm.
I hope you're using at least 99RON fuel in the form of Shell Optimax or Tesco Momentum to keep DET to a minimum. You need a remap.
Edited by ScoobieWRX on Monday 10th September 05:18
te, but i do agree with a lot you post, even though i don't say so. 
I hope you have deep pockets.....not for buying it, but running it with all the limitations Nissan place upon owners for how well you can exploit the car, the tyres you have to use etc... etc...
As much as i think it's an awesome car, i can't help thinking that even if i won the lottery, i wouldn't buy one just because Nissan want you to be delicate with it. There are reasons for that, well documented many times over.
What's the point of having a car like that if you can't fully exploit simply what comes out of the factory for fear of invalidating your warranty.
That's why i love the humble Subaru. The manufacturer has given you plenty of room for manoeuvre when it comes to modifying, and more to the point they encourage it.
If you bought an Impreza and lavished the same amount of money you would have to splash out on just buying a GTR, on mechanical modifications, you would truly have the most awesome high performance Impreza, more than capable of running rings around a GTR.
I'd rather have a Subaru
As much as i think it's an awesome car, i can't help thinking that even if i won the lottery, i wouldn't buy one just because Nissan want you to be delicate with it. There are reasons for that, well documented many times over.
What's the point of having a car like that if you can't fully exploit simply what comes out of the factory for fear of invalidating your warranty.
That's why i love the humble Subaru. The manufacturer has given you plenty of room for manoeuvre when it comes to modifying, and more to the point they encourage it.
If you bought an Impreza and lavished the same amount of money you would have to splash out on just buying a GTR, on mechanical modifications, you would truly have the most awesome high performance Impreza, more than capable of running rings around a GTR.
I'd rather have a Subaru
ScoobieWRX said:
I hope you have deep pockets.....not for buying it, but running it with all the limitations Nissan place upon owners for how well you can exploit the car, the tyres you have to use etc... etc...
As much as i think it's an awesome car, i can't help thinking that even if i won the lottery, i wouldn't buy one just because Nissan want you to be delicate with it. There are reasons for that, well documented many times over.
What's the point of having a car like that if you can't fully exploit simply what comes out of the factory for fear of invalidating your warranty.
I would likely buy one out of warranty. Yes, the tyres are bonkers money As much as i think it's an awesome car, i can't help thinking that even if i won the lottery, i wouldn't buy one just because Nissan want you to be delicate with it. There are reasons for that, well documented many times over.
What's the point of having a car like that if you can't fully exploit simply what comes out of the factory for fear of invalidating your warranty.
But you only live once. However, my car plans for the new year are changing daily right now 
... The O/H has put a block on new cars until after xmas as we are getting married, but as soon as it ticks over midnight I am hitting the classifieds 
ScoobieWRX said:
lol...Congratulations for your proposed marriage, i have to say though being married to your car instead has got to be cheaper and less hassle in the long run. At least the car does as it's told!!
Hope to see you back in the fold
Hope to see you back in the fold
Agree...It's only a matter of time till I get another turbo car. And more than likely a Japanese one
I could chop the Mundano in for this:
http://www.ebay.co.uk/itm/2006-56-Subaru-Impreza-2...
What's the honest sketch with the engines in these? What can they map to without breaking?
-P
Edited by paulmoonraker on Wednesday 12th September 10:10
400bhp or thereabouts. I don't think i'd want to go much higher on a customer car unless they accept full responsibility for their engine going pop sometime above 400 ponies. They need to be fully aware of what may happen so if anything does happen that's entirely their problem as they were warned.
These have a great crank so no worries on that score, pretty strong bottom end really it's more the pistons, and there are a few instances of the oil pick-up pipe in the sump cracking and breaking off leading to fubarred bottom ends on just 2.5's. Same deal with 2.5 Forester. There's something inherently not 100% with the design of the oil pick-up on those.
By the same token there are plenty about mapped higher than 400 and no oil pick-up pipe issues either, i suppose it's luck of the draw that you don't get one of the few unlucky engines around.
Even though that one in the pic is OK mileage wise and has a FSSH no doubt, i think it's maybe a bit over priced IMHO. It'll make as much as a 2.0ltr bhp wise but more torque from lower down. The VF35 works well on the 2.5
These have a great crank so no worries on that score, pretty strong bottom end really it's more the pistons, and there are a few instances of the oil pick-up pipe in the sump cracking and breaking off leading to fubarred bottom ends on just 2.5's. Same deal with 2.5 Forester. There's something inherently not 100% with the design of the oil pick-up on those.
By the same token there are plenty about mapped higher than 400 and no oil pick-up pipe issues either, i suppose it's luck of the draw that you don't get one of the few unlucky engines around.
Even though that one in the pic is OK mileage wise and has a FSSH no doubt, i think it's maybe a bit over priced IMHO. It'll make as much as a 2.0ltr bhp wise but more torque from lower down. The VF35 works well on the 2.5
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