NE Rolling Road Day

[trackpig]

my car was taken to the limiter @7500rpm
the highest rpm on the graph is around 7100rpm

[ShepsEvo3]

my car was taken to the limiter @7500rpm
the highest rpm on the graph is around 7100rpm

Oh, your torque figure will be out if thats correct, or your limiter came in at 7000?

[reggid]

if people are looking at the tacho to judge rpm then there is an error right there..its best to use an inductive pickup thingy

[DaveD]

Found this very interesting article

http://www.fordcaprilaser.co.uk/rolling ... rticle.htm

and will post my graphs later

[AndyTouring]

Well due to problems in getting the power down I only got an average from 2 runs. They saw peaks of 230bhp + but the car kept trying to jump off the rollers. People soon moved out of the way!

With factory power of 220bhp & 232lb/ft the guys reckoned it was giving near official figures.

Think a rechip is in order

[ShepsEvo3]

Andy, There is definately alot more power to come from your 635. They only seem to make power if they are remapped. I have done a few with less than 200 BHP and all have ended up over 220-225 bhp.

I use the Dastek Unichip or Uni-Q if removing the AFM, but cheaper options can be used (chip change, etc), but unsure if they really are as good value for money, not tried them myself? A live remap on a rolling road will ensure you have the absolute best out of your engine

[AndyTouring]

I was quoted £150 for a generic chip swap but can't remember which one it was. Claimed it would give another 10 - 20bhp.

A proper custom remap is the way to go of course.

One of the other guys had an E34 535 (211bhp factory) which put out 198.1bhp. Under normal circumstances I would expect another 10bhp over that. His car had 130k miles whilst mine has just under 80k so there shouldn't be too much wear & tear.

What's the deal with the Dastek & Uni-Q?

[Vsport]

Hi again, Dave here from Vsport.

The age old debate about which gear to run it in will go on forever. on a club day we did a few weeks ago we ran all the cars in 3rd, they complained it should have been 4th so we did the next club day in 4th and they complained it should have been 3rd

so we now run cars in both 3rd and 4th (as people atteneded noticed on most cars we did 3-4 runs) and 9/10 times it makes no difference whatsoever to the power output on the screen.

We also notice that the people that speculate and debate which gear they 'should' be run in have never used a dyno but go by what they read on various websites, leave it to the experts.

I can assure you that we take the upmost care and attention when running a car on the dyno, we take a personal interest in every car we run and try our best to make everyone happy, but at the same time we dont fiddle the figures to make people go home smiling. We prefer to give people graphs showing what the car actually made on the dyno.

[ShepsEvo3]

Dave, I know exactly what you mean. I've ran several days where people have said this, said that and says the dyno is at fault. Fortunately I have been proved right every time, backing the figures up with Data from the car. I certainly do not fiddle figures and couldn't if I wanted to - unless I apply the brakes on the coastdown, but then I wouldn't get 2 exact same runs one after the other if I did that.

I had Mike's DD machine for a week and the gear you used did make a difference to the figures on that machine. BUT, some cars will make more difference than others. For instance, an old XR3i/XR2 will show a large difference on that machine, whereas a Honda Civic Type R will be almost identical, the losses on the old FWD Fords are horendous compared to a new Honda say. Mike told me to do power runs on NA cars in third (DD recomends) Also we learned you had to watch how the car was secured (tied down) as this could upset figures quite drastically too. Having said this, that machine had a great control on RPM for mapping when you using the inductive clamp as long as the car was electrically quiet and had no misfires. Don't get me wrong, I think the DD machine is great and I liked it very much.

"I can assure you that we take the upmost care and attention when running a car on the dyno, we take a personal interest in every car we run and try our best to make everyone happy, but at the same time we dont fiddle the figures to make people go home smiling. We prefer to give people graphs showing what the car actually made on the dyno. "

Here, here! Well done! But unfortunately you will never keep everyone happy and there will always be someone blaming the dyno or operator if thier car is down on (or up on) power. Its always handy however having another identical car at the event which is making the numbers if someone elses isn't. There really is no point in fiddling figures and you'll open yourself up to a whole can of worms if that is done, waving goodbye to a good reputation.

[AndyTouring]

Dave @VSport.

No criticism of the way you handled my 635. Running any car up to speed whilst stationary is risky - ask Ferris Bueller!

Trouble with trying to run the 635 in 4th is that a) when given full throttle it will change down to 3rd at anything below 110mph or so & b) It's a 30mph/1000rpm overdrive, max revs in 4th = 195mph! According to the Autocar roadtest, 2nd was good for 90mph & 3rd was 121mph at the redline. By using the 3-2-1 selector you can lock the trans into whichever gear you move the handle into.

With more stable readings I'm sure the final average would have been higher. The most important thing I took away from the day was the knowledge that I have a good strong engine which is up to factory spec. I'd like to do a remap but that's for the future.

[ShepsEvo3]

Dave @VSport.

No criticism of the way you handled my 635. Running any car up to speed whilst stationary is risky - ask Ferris Bueller!

Trouble with trying to run the 635 in 4th is that a) when given full throttle it will change down to 3rd at anything below 110mph or so & b) It's a 30mph/1000rpm overdrive, max revs in 4th = 195mph! According to the Autocar roadtest, 2nd was good for 90mph & 3rd was 121mph at the redline. By using the 3-2-1 selector you can lock the trans into whichever gear you move the handle into.

With more stable readings I'm sure the final average would have been higher. The most important thing I took away from the day was the knowledge that I have a good strong engine which is up to factory spec. I'd like to do a remap but that's for the future.

Andy, Automatics on any dyno can be a nightmare to power run and map. Even locking your gearlever in 3rd or 2nd, it will probably still want to changedown a gear if you start the run at low RPM's.

[AndyTouring]

As I understand it, the 3-2-1 mode won't. Believe the torque converter will slip as required but it won't change down. I'll give it a try to check!

Think the main aim of the 3-2-1 mode is for snow/ice or hill driving.

[ShepsEvo3]

Andy, did you try it? I played with a 540i V8 today and it would change down from 3rd in lock up 3rd when you went anywhere near the kickdown, which I guess in icy snow conditions you wouldnt really be going to the kickdown, unless you are a hoon! lol

[AndyTouring]

Haven't had a chance yet. Off down to the Trax event at Silverstone this weekend so I'll give it a go then.

Where's my RAC card???