73 replies to this topic

[Duncan VXR]

Ok well its been in the making for some time but managed to get the final spec fitted and tested to a VXT CS stage 4 car of following spec

Completly stock LET engine other than VXR turbo, VXR injectors and uprated plugs. Comp spec clutch and full miltek 2.5" exhaust

Tom had traveled down from Aberdeen to meet up at the RR in Runcorn where we did 3 runs prior to any changes, the main reason for producing this kit was to reduce the compressor surge, turbo stalling, wastegate chatter or whatever you like to call it



Made 273.4bhp and 338.3 ft/lbs torque

After fitting the kit we did another 4 runs to check everything was ok and see if it would make anymore power (the kit was built to address the chatter problems and the following was the output


Made 309bhp and 375 ft/lb of torque

A MASSIVE 35.8bhp & 36.7 ft/lb torque 3 of the 4 runs within a few bhp 4th run the header tank had a small crack which got worse :S very lucky to have a alloy one in the car so day saved late on a sunday with nowhere open and hrs from home

It is worth noting there is no smoothing done to the graphs which most RR do, could have done this but seemed no point tbh. Fueling was a bit to rich on the CS map in pre kit runs but spot on with the kit fitted and still a nice saftey area top end. Sure Tom will update at some point but initial feedback was that it had solved 90% of the chatter issues he was previously experiancing which was the goal

Chris RR is not the best for pub talk numbers (previously made 283 iirc) on CS rollers. And BIG thanks to Chris for letting myself, Dave & Tom take over his unit for the day - and regular coffees

Also MASSIVE thansk to Dave H for his help in making this kit with me and taking the time to help out on Sunday, he really takes OCD and quality to a new level even I look upto. And looking forward to helping him with the Garrett conversion on his after getting an engine Sunday also

I also have no way of changing the oe maps and not my area of skills but worth noting a chunk of that power will be the better control of the boost and letting the turbo actually reach target pressure better and the intake kit complements that need for air, time permitting it would be nice to do the upgrades seperate but after starting a 5am and getting in gone 7pm I was already in the bad books

I will have the airbox alone tested on a stage 2 vxt sunday (DG rr day) and 70mm AMM / PA 70mm intake kit

Enjoy reading
DG

[siztenboots]

I've been runnign a stupid sized cone, but I have doubts about its filtration and possible damage to the comp wheel. If there is a better paper filter type in this kit then I'm keen to do this before fitting my new K06. Currently at 360 ft.lb

[Duncan VXR]

Steve thats a brand new oe paper filter fitted I forgot to take any pictures of the kit fitted but have asked the owner if he could take a few once he has recovered from the long drive back to Scotland DG

[Duncan VXR]

Zacs standalone conversion has the same kit (well different design due to turbo setup) and runs a ITG filter but again no back to back tests and no AMM to worry about DG

[Duncan VXR]

I am more shocked that a 2.5 miltek made over 300bhp as previously 3" seemed to be the only way to get into the magic 300 club. Really happy with the output

[Duncan VXR]

Oh have the boost and fueling plots also but no time currently to upload stuff Monday work hell :S

[spuk87]

No mention of cooling in the spec (CC/IC), is it stock!? Either way that is a great improvement in torque and power. ETA: guessing it is CC as it's Courtenay stage 4. Also particularly good result from a 2.5" exhaust!

Edited by spuk87, 26 March 2012 - 09:48 AM.

[SteveA]

I will have pretty much the same setup as this when I fit my new parts so am interested to know what the kit includes and how much? Cheers Steve

[Nev]

Good result Dunc & Dave. As I've been banging on about for the last 2 years, power is commesurate with good breathing. Personally I think, in the 300+ BHP cars a double paper filter airbox will see further benefits and maintain great particle filtration down to manufacturers (very high) levels.

Edited by Nev, 26 March 2012 - 10:51 AM.

[Duncan VXR]

Guys sorry yes PA full charge cooler setup There is also a breather tank for the crankcase option onto of the current kit to stop all that oily hot air going back into the turbo but at time of fitting a solution we were happy with was not completed but will be done this week. As you would expect CC header tank take a chunk of space and want it to have an oe look and feel to it with a quality finish I must get a price on as for sale to conform to true .org rules but looking at options of just airbox or airbox and pipework minus the recirc upgrades which I will do the breakdown later but; 1. Full kit with both recirc upgrades, pipe work, airbox mods, clips etc £800 Fitting is quite a chunk of time but can do for £100 if required Also tested the larger AMM made but ECU need tweaking to run it DG

[Tom]

As Duncan said it was a full day on Sunday and a big thank you to Chris for letting us used the RR. As for the car had no problems on the way back to Aberdeen only once did it clatter and that was only for a few seconds not like before where you had to lift off to stop it. Been out today no signs of the clatters had someone take it out for a hour or so and they could not get the turbo to stall so far so good but as I am here for other week will up date later this week. The best test will be when my wife drives it as she hates it for that reason. The power numbers was not what we were looking to get out of this kit but they are good and the car feels a lot smoother to drive instead of full on or of now. The kit is of a very high standard and Duncan was fantastic in the way he went about the job great guy and I would say to anyone who is thinking about getting work done on there car talk to Duncan first he is the best I have seen working on a VX he has turned a CS 4 car that to be honest was crap into a fun car again. Dave work is really good but still a bit hack about the headed tank I would have bought one just did not want it that day but sh** it done now and it looks good. So would like to thank Duncan for all the work he has done yes the kit is not cheap but you are getting something that works (so far).

[zebwach]

Hugely impressive results, especialy considering the restriction of the exhaust and turbo. But as tom said, the aim was driveability not power. I have also found the noise to be a lot calmer and civilised, especialy on the motorway. Interesting that chris's dyno is concervative. Mine was making 300bhp at the rear wheels from memory, so his setup is adding 15% for transmission losses. What do cms add?

[Rosssco]

Good improvement there - when's the pax ride Tom?

[kipper]

Guys sorry yes PA full charge cooler setup

There is also a breather tank for the crankcase option onto of the current kit to stop all that oily hot air going back into the turbo but at time of fitting a solution we were happy with was not completed but will be done this week. As you would expect CC header tank take a chunk of space and want it to have an oe look and feel to it with a quality finish

I must get a price on as for sale to conform to true .org rules but looking at options of just airbox or airbox and pipework minus the recirc upgrades which I will do the breakdown later but;

1. Full kit with both recirc upgrades, pipe work, airbox mods, clips etc £800

Fitting is quite a chunk of time but can do for £100 if required

Also tested the larger AMM made but ECU need tweaking to run it

DG

Impressive results there Duncan. When do you think that you will get into a production run of the various kit combinations?

Regards

Dave

[Duncan VXR]

Ready for orders now sir, just need to workout cost of non full option and will get in the for sale section tomorrow at the latest DG

[Duncan VXR]

2 week lead for kit

[cnrandall]

Are you saying you found 35bhp with an induction kit? If so, was there a bird wedged in the entry to the old one?! At 300bhp there is a very small pressure drop across a good condition stock filter, not enough to make any real discernible difference. Also, as much as I think the Miltek is sh**, it happily flows well enough for 300bhp, the real restriction is in the exhaust manifold and not a lot you can do about that.

[zebwach]

Are you saying you found 35bhp with an induction kit? If so, was there a bird wedged in the entry to the old one?! At 300bhp there is a very small pressure drop across a good condition stock filter, not enough to make any real discernible difference. Also, as much as I think the Miltek is sh**, it happily flows well enough for 300bhp, the real restriction is in the exhaust manifold and not a lot you can do about that.

Interesting point, but i cant see a more fair way of testing a piece of new hardware than on a 'back to back' rr, on the same day. The results speak for themselfs.

[Duncan VXR]

Kit designed to reduce the horrible compressor surge vxt's suffer from and my kit has done what I set out to acheive. Power increase is not the intake kit alone but better control of the boost aso, but the intake IS the best you can get with oe layout and looks. Just a bonus the design and flow aids the turbo and added power All of which was stated on my 1st post, not into bull and selling it on some promise every will gain x although I have done a lot of thought and research to make it a lot better than whats currently out there DG

[Duncan VXR]

Ok Tom has kindly sent some pictures over - the catch tank for the crankcase breather been worked on this week to complete