KieranWRX

hi guys, basically my scooby classic is running 298 bhp apparently on standard injectors, how do i find out if they are standard? im wanting to turn psi up, but will require bigger injectors if they are standard, which do i go for? and this would require remapp

what gearbox/diff oil is it i need? i have a slight leak coming from the front so want to keep it topped up until i find the problem, thanks

musso2010

If you fit larger injectors, they you will need a remap. Depending on the year of your car, pre 97 cars cant be remapped, they need either a new ecu, an ESL or a chip.

What mods has your car got?

As for oil, Catrol Syntrax is what i have in mine, its very good stuff.

KieranWRX

yes my car is pre97 but has a prova ecu on already,

mods are, full exhaust system, front mout intercooler, remapped, as far as im aware that is,

and i can buy that from anywhere? will have to find the bung for the box, needs some oil in

musso2010

www.opieoils.co.uk is the place for oils etc...

I would remove the prova ecu personally, they are mapped to run on 100-102 ron fuel. If you decide to keep it, before you do anything else i would buy a Knocklink, to check if its detting.

Have just checked your garage, nice motor!

KieranWRX

im running 298.2bhp and dont to run lean im only running 11psi and dont want to up it until i know ecu can cope with the fuel plus i need bigger injectors

and thanks m8

musso2010

Ditch the ECU, and get an ESL live map. And i always thought the Prova Ecu's ran 16psi??? Maybe someone with more knowledge can advise you on that...

KieranWRX

yeah thats what someone said, car was imported in 2008 and guy who had it before me didnt really know anything about it, he said it was running at 1.1 bar but the guage is in psi im guessing its running standard injectors so they only put boost to 11 psi

musso2010

Hmm, I am running 380cc injectors at 17psi with no problems.
Have you got a boost controller fitted anywhere? If it was me, i would remove the ECU, and the front mount, and fit a std ecu. At least then you know the car will be safer. Save up the cash, and have an ESL fitted, then the car will be mapped for UK fuel, your front mount etc...

KieranWRX

i have a **** under bonnet to adjust the psi

musso2010

Hmm, Remove the boost controller, and refit everything back to the standard boost control solenoid. You will then probably make the 16psi your looking for.... How long have you had the car? I would be suspicious as to why the boost has been turned down... It wont be due to the fueling, as the ECU is set to run 16psi on them injectors.

KieranWRX

had the car a month, its been rolling roaded at 298.2 bho but that was 2 years ago, boost guage says 11psi, guy was sure it was 1.1 bar but gauge is in psi, not sure what has been done to it as far as im aware its, hks induction kit, full exhaust system inc decat, prova ecu remapped, FMIC, dump valve, guy told me td04 turbo but tdo5 is standard i think

musso2010

You should have a TD05. 11psi isnt 1.1bar, so he is feeding you rubbish.

I would remove the manual boost controller, and go back to the factory boost controller. I suspect that the boost has been turned down due to an issue you are not aware of yet... I say this because my mate was in a similer situation, the boost was turned down, and on increasing boost to the factory level he discovered his clutch was slipping.

If you need help removing the manual BC, let me know!

KieranWRX

yeah dont think the guy knew much about it tbh, it has no air con belt either, the guy said reduces strain on engine :s need a scooby garage local to me to take it

chaffe

iTrader: (1)

Approx 15 psi in one bar, 11 psi is .7 bar, around 200 bhp i would think

KieranWRX

thats what i mean and its running 298.2 bhp

L.J.F

iTrader: (31)

get it booked in with a specialist mate.

KieranWRX

is there any specialist around lincolnshire?

chaffe

iTrader: (1)

dont think it will be any where near 300 bhp @ only 11 psi, a std wrx makes 225 @13.5 psi, you would need 18-20 psi for that bhp, IMO.

harvey

iTrader: (48)

If you look at the injectors and they are a grey colour they are 380cc and capable of around 280 bhp or a little more on standard fuel pressure. If they are yellow they are 440cc and these will top out somewhere before 320 bhp. After that you need 550cc injectors which will get you almost to 400 bhp on standard fuel pressure. You have a Classic so you need side feed injectors.
Increasing the fuel pressure will extend the range of the injectors but only by a relatively small percentage eg. 25% increase in fuel pressure (which is probably not a good idea) will result in 5% power increase ability.
You cannot go changing injectors or increasing fuel pressure without remapping the car if you want it to run properly.

KieranWRX

i have the rolling road to proove it mate, and the car is very quick i do belive it is running around the 298 bhp figure as shown just not sure how the hell it is on that psi, car needs booking in and need to find out exactly whats been done to it


okay i will check and find out what injectors it has, but ideally i want to take the car to a specialist or someone near me who is clued up on these to know what the hells been done to it because at the minute im highly confused on this bloody car and whats actually been done to it, maybe it has had more done then i know and previous owner knew,

the car is very quick so im guessing it does hit the 300bhp mark, what top speed are you talking from say 250bhp and then 300bhp

thanks for the help guys

chaffe

iTrader: (1)

i suspect the gauge is badly misreading, because as mentioned previously it is just not posible to make that power at that boost. Do you have a picture of the boost gauge?

KieranWRX

picture of guage:


Uploaded with ImageShack.us

musso2010

The RR figures were taken 2 years ago... So something has gone wrong between now and then. Imo, that figure of 298bhp means nothing as you are noway near running the correct amount of boost to make that kind of power. I am not saying it DIDNT make it, obviously it did, BUT something has gone wrong between now and then.

You need to get rid of the manual boost controller **** thing you have under the bonnet, and plumb everything back to the factory boost control solenoid. That would be a logical start. You should be running 16psi on that ecu, your only making 11psi most likely because your manual boost controller is turned down.

chaffe

iTrader: (1)

same gauge as mine, ah na! looks like it is sitting at -2psi to start with. mine goes to last line before 20 psi ;-)

KieranWRX

yes i know what your saying but people are imply its would be running around 220bhp with that psi, but its no where running that its running more, what top speed would be looking at then? for 220bhp and 300bhp? because i took it down a private road on a mate farm track, im taking it to a friend whos owned a scooby for 8 years to see what he says about it and have a good look round


yeah and sometimes it hits 12psi could be guage?

musso2010

I cant answer what your top speed will be at certain bhp figures. Top speed is also down to gearing and torque. Not just bhp.

I am starting to loose track as to what your question actually is?

KieranWRX

there is plenty ha,
well ive found out most questions i want ive just got to take the car to garage to find out why psi is so low, if it is running around the 300bhp figure, if its running standard injectors and see if anything else has been done with engine because surely it wouldnt hit 300bhp with just fmic, prova ecu and exhaust system

i dont want to turn psi up if its been lowerd for a reason

Jamz_

iTrader: (12)

70mph

I cant see why the car cannot make your figures with your mods, as mine has made 310 with similar mods (standard ECU with chip)

KieranWRX

with only 11 psi boost though?

musso2010

You will be running 380cc injectors, Unless they are yellow, in which case you have 440.

And 300bhp isnt uncommon for that type of set up to be honest.