No idea I'm sure someone will come along soon and say - surely if a bad contact with rollers it would show less BHP ? Also with the cars it keeps up with I'm pretty sure it's bang I the money - I did get it wrong before - I had a prodrive exhaust on and a cat on my first visit- so the changes since last run are FMIC - nur spec r and down pipe - that seams a realistic gain

 

dastek

i was there also today
just after xmas my car made 450/400 on the same rollers

went back today with added ID 1000cc injectors harvey up-pipe and meth
picked the car up from my mappers this morning and it felt great a very noticeable change had a blip on motorway with another scoob that i know well the torque was awsome best the car has ever felt

then on the rollers the boost was dropping off
6-7 runs later after getting

440lbft
and only 433bhp

went back on the road with a mate and checked and the boost was holding strong

but good day the car feels great so i am happy

 

Fight club

 

Dave - So after fitting 1000cc injectors harvey up-pipe and meth you lost bhp but gained 40lb ..... what rollers were used?
Any standard cars running hitting the numbers they should be?
As I have said (and you too) If it drives sweet and run's fine then who cares about numbers on paper

 

Yeh a stand wrx 270 ppp hit the numbers 277, 275, 27? Over the 3 runs

 

Slip = less friction = more bhp, most rolling roads can pick it up, you can just get a bad connection or slip and not be picked up, just ask Gaz about that

 

It's a dastek rr and defiantly not slipping

 

Some of the slip you wont notice, thats why you just take the first runs you do on that rr with a pinch of salt, until you do another run on a different day and it gives you the same results its a bit hear say.
You need to put the graph up, the vf35 cant run that sort of power without being ported hence my above comments (plus what boost was the car running and what are the torque figures?)

Also as I said before, my old car ran at Prosport last year and made 312bhp, it use to happily run 312-316bhp on those same rollers when I had the car and thats after 5 years!

Tony

 

343.5 lbft@ 4541 rpm boost 1.6 correction factor 98.8%

 

Do you have the graph?

 

I don't know how to upload it ! I ca take a photo and email it if you could put it up for me

 

Best way is to use www.photobucket.com and open an account, you just select the upload and then where the graph is stored, once uploaded you can use the link and just cut n paste it

 

I on mobile and it won't let me create an account !

 

Just mail it

 

Done !

 

popcorn ready

 

How was the ambient temperature accounted for? Snowing = very cold day. Let's hope you're as happy in the summer....

 

Thought this may be of interest and ill get graphs up tomorrow.
I've just been to ENGINTUNER on sat for a re map on my Sti v8 with a ported vf35. The turbo was done by ian(big d) that had the high powered vf35 on here.
Just for my results.
Christmas I had a map tweak by martin Jeffery and it made 315hp 290ft/lb torque @1.5 bar peak and 1.4 bar hold which I thought was good for a standard car.
Sat I returned with a few mods such as
Ported vf35 with forge actuator set to 1bar base pressure, Japspeed Headers,
de cat down pipe,
silicone intake pipe,
forge dumpvalve with red spring,
RAMAIR induction kit
Thermal Inlet spacers
Front mount intercooler
( so basically refined my set up without changing the major power limiting factors which are turbo and injectors)

The car made a very respectable 352hp -360ft/lb torque
With a peak boost of 1.5 bar and holding 1.3 solid(slightly less than last time due to front mount capacity)
The 70ft/lb torque is at 4000rpm mainly due to headers.
Just wanted to share my results on the 35.
Many thanks Chris

 

The VF35 has to be ported, in standard form on a full decat it will creep due to its small wastegate port. 100% of all the VF35 turbos I have setup have suffered from boost creep, the porting is essential to gain initial control of the turbo. Granted a positive side effect of this is that you will see more power from less boost due to the gains in increased gas flow through the turbine housing/wastegate port, but it has to be done right .

Flak jacket is on

Cheers Iain

 

my old vf35 used to suffer from boost creep and throw up a cel light from time to time on full boost especially if it was cold.
forget the code now but something to do with solenoid or wastegate

 

Chances are it would have been an overboost fault code if it was creeping. Out of interest I have also noticed that around 40% of the VF35 wastegate ports have developed cracks at the 6 + 12 o'clock position, there has been a lot of suggestion made that this is due to the pressure exerted on the turbine housing by the wastegate actuator, I simply think it is due to thermal stress loading in those areas due to the choking effect of the wastegate port being too small.

Cheers Iain

 

Here are my vf35 graphs bore and after from sat @ ENGINETUNER.
Before and before and after overlapped to see the difference.
Cheers Chris

 

Here is my graph old figs vs new


http://i153.photobucket.com/albums/s223/TonyB1968/rr%20day%20pics/photoCAB26Y5Y_zps6428d295.jpg

 

that looks consistant

 

Blackpool don't believe what dastak RR say, I had a VF35 on my setup 2years ago and pulled 372hp at motorscope on a dastak they always read high, get it on scoobyclinics RR what is more accurate and 343hp a week later at the min I'm running an md321h and only pulled 398hp which is about right for that turbo

 

We could bang on all day what rolling road has a truer reading its about real world - so dave w - how do you think it performed on the way home ? Like a 320 BHP car 350 bhpcar or what the reading said !

 

dont know m8 you were so far behind

your car does go well

i was on them rollers when i had my vf35 and still on top mount and got a print out for 361 bhp but i know jack compared to people on here yes its nice to hear figures but as long as your happy with the car thats all that matters

 

Very nice reading.

Was your tyres at 100psi

 

No

 

No