Shaggy

After a short discussion with darren @ G-werks , it seems the car was mapped on Tesco 99 Ron fuel!! Now considering that i run my car on 97ron optimax, it means the car is pinking because of the ron rating.. Now this makes me think??? is the tesco stuff better..... The car does feel a little slower with optimax, and after reading the tesco site thier fuel does seem to be quite good and after a few searchs alot of people running it say its better than optimax and even BP ultimate. For the time being i think i am gunna whack in some tesco 99 ron and see what happens, atleast it shouldnt pink, giving me enough time untill darren has time to map the car on optimax.

Your cables may just need adjusting?

Just PM'd ya mate! 8)

Hi mate, If your running a FMIC you dont really need dual stage, i have a single stage kit on mine, using the 0.3 (3) sized jet, which is located just before the throttle body, think there is pics of it somewhere on here?? I am running a 70/30 mix at the moment which seems to work quite nicely, i also have it kicking in at 15 psi , this helps the water/meth atomise correctly. I managed to get my demin water from buck @ Hickman and the methanol from 76 racing, (cant remember the exact name, will have to find the link for ya) If you go down the same sorta route as me, i think you will be quite impressed with the results, i can certainly notice a difference when the injector kicks in, its not NOS or anything but it does seem to make a difference.. I may also try different ratios, such as 60/40 & 50/50 etc etc. Just gotta try and figure out the problem with my car first before i can start messing around with mixtures. :)

as a test i took the timing all the way back to TDC, and that didnt seem to do much, it still didnt seem right.

Just took the car out again, and the same thing keeps on bloody happening!!! It hits a wall and will not boost past 10 - 11psi it always seems to do it when changing hard from 3rd to 4th, like i said and even up into 5th as soon as i have changed gear and my foot is planted it just doesnt boost upto properly and has probably half the power?? this is starting to get on my tits now as i cant work out what the problem is, everytime i think what the problem may be i am stumped as to what problem i actually have....

No point discussing this issue on 2 seperate threads :) http://the-corrado.net/.archive/forum/viewtopic.php?t=42464

Just had another look at the timing.... The timing is ok and at 6 deg BTDC not advanced like i previously thought, I have reset the timing etc anyway and is pretty much spot bollock now. I am not sure if this is worth a mention but i put £10 worth of "esso supreme fuel" in the other day after i had filled it up with shell optimax, as the shell garage near me was shut and i was very low on fuel after a day of driving... would this cause such a dramatic issue?? Its the only fuel i could get , its not that bad is it?? Another thing that occured to me is that surely the knock sensor should detect the pinking and automatically adjust mixture to suit??

Checked the timing and from what i could tell it was advanced by quite a bit, this could well be why it was pinking, i have backed it off a little bit and the pinking is less noticable but still there.... I guess it would pay to maybe set it up at 6 deg BTDC and see how it reacts??

I always run it on optimax, apart from when i am desperate and there are no shell garages around... :) I am going to check the timing and see what that shows, it may well be that i need to reduce the amount of advance, but will only know this when i can check the timing, If all else fails i will pop the car back to G-werks and get darren to have another look at it. Cheers for the help guys!

I am using optimax. i will put a timing light onto the fly wheel and check its set @ 6 deg BTDC as per normal. if it was pinking wud this cause the problem i seem to be having?

Saying that i hav noticed a slight pinking noise when engine is under load? at first i thought it may be the mounts creaking as thats what it sounds like. i am not sure if darren advanced the timing a little when doing the live map?

hmmm they could be it??? Something is pulling the timing back, this could be the problem now that i think of it... is there any way of checking this?? Oh and where abouts is it on the G60 block?

Should be interesting to see how that copes with all that power your gonna have matey! 8)

Checked all the pipes darren, theres doesnt seem to be any boost leaks?? I am starting to mabye think it maybe my lambda probe?? that stainless manifold flows so nicely that maybe the gases are coming out too quickly for the lamba (GSF universal jobbie) to gauge what is going on when accelerating hard up thru the gears?? Its quite a strange thing that happens, when accelerating hard its almost as if its being retarded slighlty, For instance, i left it in 3rd gear and booted it and it sort of hit a wall and could only boost up to 10 -11 psi, i then lifted of the throttle and put it back on gently and it backfired almost as if it was chucking loads of fuel out, soons as its done that its fine and its shoots off again?? **Another thing i thought of would be the woodruff key and the bolt on the crank starting to fail as i ve heard this happens quite oftenly, and this i guess may also effect retarding/advancing changes & boost differences?? its only happening when engine is under load? would it be possible that the crank bolt / woodruff can work loose & fail and cause enough movement to adjust the timing**

Checked all the pipes darren, theres doesnt seem to be any boost leaks?? I am starting to mabye think it maybe my lambda probe?? that stainless manifold flows so nicely that maybe the gases are coming out too quickly for the lamba (GSF universal jobbie) to gauge what is going on when accelerating hard up thru the gears?? Its quite a strange thing that happens, when accelerating hard its almost as if its being retarded slighlty, For instance, i left it in 3rd gear and booted it and it sort of hit a wall and could only boost up to 10 -11 psi, i then lifted of the throttle and put it back on gently and it backfired almost as if it was chucking loads of fuel out, soons as its done that its fine and its shoots off again?? **Another thing i thought of would be the woodruff key and the bolt on the crank starting to fail as i ve heard this happens quite oftenly, and this i guess may also effect retarding/advancing changes & boost differences?? its only happening when engine is under load? would it be possible that the crank bolt / woodruff can work loose & fail and cause enough movement to adjust the timing**

Just took the car out again after checking the ecu hose and a few other things and everything seems ok! this is looking like one of those annoying little gremlins :wink:

hmmm maybe?? i am not totally sure about this one, there are a few things it could be, i ve just got the car back from g-werks, and was fine up untill it happend last night, and it happened 2 times in total, is the map sensor somehting i can check myself??

This may be a slight worry?? When changing from 3 rd to 4th the car wasnt making full boost and was down on power, its strange almost like the belt was slipping?? but this isnt possible with toothed belt, the only other thing could be a boost leak maybe? Its happened twice now, at first i thought my charger was going to blow up but there are now noises coming from it at all, like i said usually the car makes an easy 15 psi, when i was giving it some last night the gauge was only reading 11-12 psi when changing gear from 3rd @ around 5800rpm to 4th?? and when i lift of the throttle and buildup the power agian its making full boost, which leads me to think i may have a boost leak somewhere?? i have also heard that the lambda probe may cause a similar problem?? and as seeing i have an aftermaket gsf item on there at the moment this may want changing? any thoughts? *** just had a quick look over the car, found that the ECU vacuum line going onto the throttle body was quite loose, there was no clamp holding it onto the brass fitment, it seemed to move around quite a bit, would this cause any problems?? I have secured it on now and doesnt seem to move at all now.***

This may be a slight worry Darren?? When changing from 3 rd to 4th the car wasnt making full boost and was down on power, its strange almost like the belt was slipping?? but this isnt possible with toothed belt, the only other thing could be a boost leak maybe? Its happened twice now, at first i thought my charger was going to blow up but there are now noises coming from it at all, like i said usually the car makes an easy 15 psi, when i was giving it some last night the gauge was only reading 11-12 psi when changing gear from 3rd @ around 5800rpm to 4th?? and when i lift of the throttle and buildup the power agian its making full boost, which leads me to think i may have a boost leak somewhere?? any thoughts? *** just had a quick look over the car, found that the ECU vacuum line going onto the throttle body was quite loose, there was no clamp holding it onto the brass fitment, it seemed to move around quite a bit, would this cause any problems?? I have secured it on now and doesnt seem to move at all now.***

We use FAG precision bearings at work on our CNC machines which run 24 hours a day, they seem to do the job and look like a good quality bearing. Not sure if this has any relavance to G60s but there not really a "cheap" bearing manufacturer from my experience if that helps at all??

Nice choppage!! will have to save that one me thinks!! :)

Just got back from picking my car up from G-werks!! :) :) :) :) The following work was done :- Modded Gearbox fitted / Vr6 clutch BBM Solid mount and new bracket - sorry JT-G60 8) Custom Remap finished Stainless Manifold Solid Tensioner And a few other general service items... To say i was impressed was an understatment!!!! i ve had a big grin on my face all day! :) Darren and the lads didnt finish the map untill 12 o'clock last night!! now thats dedication for ya.. seeing as i was probably asleep at that time. :-P The car is bloody amazing! it was a bit rapid beforehand but now together with the gearbox and other mods its now seriously quick! to the point i shit myself a few times on the way home. The VR6 1st & 2nd gears work so well and its flies up to 80 quicker than i can change gear, it revs round so quickly!!!.. :oops: And looks like i may not have any belt snapping problems now with this solid tensioner which seems to do a very good job in keeping the belt at the correct tensioner all the way upto 6000rpm. I am so impressed with it i am gonna have to get a vid made up to show you lot what its like on the move! Big thanks to Darren, Steve & Everyone @ G-werks / PSD , excellent job!! :) :) :D

Agreed!

now lets not take this toooo far :) , the problem has been identified, and has addressed a few answers, thats a good thing IMO, ok not perfect but atleast we have answers and pictures to document such a failure now hey?? maybe we could get someone to get a CNC machined bracket made... 8)