38 replies to this topic

[siztenboots]

You don't have to run super it'd up to you what fuel you map the ecu on

i meant stg3 , needing super

[The Batman]

You don't have to, it's just suggested you do

[siztenboots]

without a knock sensor thats crazy , imho

[Sutol]

Been through a couple of CV boots as well since the change to Stage 3 but can't honestly attribute that to the step up, as I also killed one at Stage 2.

I think that is more down to having the car lowered. It seems always to be the near side that goes which is the shortest drive shaft thus having the longest travel. It's also close to that hot U bend of the exhaust so if you are running extra power this won't help the longevity of the boot.

[Phear]

Off the back of that then, what are the main reliability issues??

I really don't think there are any reliability issues, I would have said a well built Stage 3 was actually more reliable than stage 2 due uprated components. I've not heard of anybody killing gearboxes, and I'm still on the Std clutch with no slippage.

I also run on 95 RON and had Courtenays map it accordingly, I don't see a problem if you running low comp pistons, if your running standard comp pistons @ Stage 3 then yes 97-99 RON is probably advisable.

[The Batman]

Just watch out for oil consumption on stage 3's when on track

[bunsenburner]

I'm on a stage 2 SC running 250bhp and I find the car incredibly well ballanced in all respects, with the handling and power just where you'd want them. I bought the car mostly for track use and it can be relatively easy to drive as the power delivery is even and third gear is more than adequate for all but the slowest of corners. In the dry there's not much trouble in getting that power down so you can floor it before you're fully out of the corner. The biggest concern for me with stage3 is the noise levels. I have a VSE which is 98db static and I'm just about under most track limits. Any louder and the trackdays available begin to shrink, which is the last thing I want to happen. I don't think there are any big power VXs out there that don't have noise issues. The other slight worry is that with more power I'll be forever cautious with the right foot - perhaps that is just me being a novice tracker and I might think nothing of it in a years time. When I bought the car the stage 3 components were all there, so once I've done everything there is to do in a VX I will inevitably have to make a decision of whether to go for more power to get the excitement back, or get something else. With the extra cost issue out of the way I think 300bhp might be very tempting indeed.

[Winstar]

without a knock sensor thats crazy , imho

it does have a knock sensor, it doesn't have a inlet temperature sensor

[smiley]

Can i run my courtenay basemap on ron95? (driven in anger of course)

[siztenboots]

without a knock sensor thats crazy , imho

it does have a knock sensor, it doesn't have a inlet temperature sensor

sorry schoolboy error

[Phear]

Can i run my courtenay basemap on ron95?
(driven in anger of course)

They don't advise it, but I did and it never blew up

[Seb.F]

without a knock sensor thats crazy , imho

it does have a knock sensor, it doesn't have a inlet temperature sensor

sorry schoolboy error

I wouldn't have thought it as imperative on an S/C, the heat a turbo generates is fives times that of an S/C? We've seen charge cooling systems sit as low as 25 degrees for a stage 2 S/C.

[siztenboots]

without a knock sensor thats crazy , imho

it does have a knock sensor, it doesn't have a inlet temperature sensor

sorry schoolboy error

I wouldn't have thought it as imperative on an S/C, the heat a turbo generates is fives times that of an S/C? We've seen charge cooling systems sit as low as 25 degrees for a stage 2 S/C.

are you confusing with a centrifugal SC?

[chris_uk]

I run my stg3 all year round unless the weather physically means i cant ie snow. The only thing that bugs me on my daily drive is the cold start throttle, it just doesnt like you touchin the throttle for at least 5 mins; i love the lumpy idle, I dont find it too loud even withou a cat the supercharger whine only happens when you want it to The power delivery is just so much better than stg 2 Imo the extra power doesnt decrease from track enjoyment, some people find it nicer with less power as it feels safer being more aggressive with the throttle out of a corner but if you have a decent setup vx with there shouldnt be a problem ( even in maxs car when cliffie took me out there really was soo much room the car gave you for error, i was quite supprised) The price for the stage 3 wasnt really that much more, if id got a sorted stage 2 i probably wouldnt bother going to stg 3 now ive done it but if i was superchargin for the first time it just go straight to stg 3. As for the oil consumption.. Just keep an eye on it when your tracking it and just give it a check every month.

[techieboy]

I wouldn't have thought it as imperative on an S/C, the heat a turbo generates is fives times that of an S/C? We've seen charge cooling systems sit as low as 25 degrees for a stage 2 S/C.

Not sure a measurement of the coolant temp in the header tank is really indicative of anything. Certainly not IAT's. If my SC comes off at any point over the winter, I'm going to get the inlet manifold drilled and tapped for a temp sensor, so that I can log the temps on my Performance Box. Wouldn't surprise me to see some pretty high temps given the 2.9" pulley.

[Winstar]

without a knock sensor thats crazy , imho

it does have a knock sensor, it doesn't have a inlet temperature sensor

sorry schoolboy error

I wouldn't have thought it as imperative on an S/C, the heat a turbo generates is fives times that of an S/C? We've seen charge cooling systems sit as low as 25 degrees for a stage 2 S/C.

in terms of efficiency then a roots SC is much less efficeient than centrifugal compressor however SC's are normally running alot lower boost so reject less heat.

It probably matters less as with an SC as the relation ship between the ambient air temp and the compression + Charge cooling should be alot more uniform than with a turbo

[The Batman]

I am still unaware of anyone getting accurate intake temps Nick will hopefully shed some light on the 2nd though

[siztenboots]

without a knock sensor thats crazy , imho

it does have a knock sensor, it doesn't have a inlet temperature sensor

sorry schoolboy error

I wouldn't have thought it as imperative on an S/C, the heat a turbo generates is fives times that of an S/C? We've seen charge cooling systems sit as low as 25 degrees for a stage 2 S/C.

in terms of efficiency then a roots SC is much less efficeient than centrifugal compressor however SC's are normally running alot lower boost so reject less heat.

It probably matters less as with an SC as the relation ship between the ambient air temp and the compression + Charge cooling should be alot more uniform than with a turbo

so we can throw out this fives times heat stuff, given no references

[Exmantaa]

I am still unaware of anyone getting accurate intake temps

Nick will hopefully shed some light on the 2nd though

The SC chargecooling is probably OK-ish, as long as the system keeps working and you don't fit too small pulleys. This screenshot is from a steady drive-home-from-work log and taken just after I did a short WOT burst. (after a steady 80-90km/h cruise in 5th in 12*C outside temps...)
IAT2 (= manifold air temp) is already reaching 42*C after this 5s WOT burst at 100+km/h! (3.05" pulley and dual pass cooling with PA pre-rad.)



Just extrapolate that for full throttle track use and 25+*C outside temps...