1.4bar - TD04 - Standard Internals...?

W

weakboy2

Member +
lol, i get slight wheelspin sometimes in third, but i need an anti lift kit to help out a touch, second is useless lol :p well... past 4000rpm :(
 
munday

munday

Member +
nexia201 said:
no its not thesame to run car on 3rd and 4th gear but then on 3rd gear the reading would be more than in 4th gear as it is a lower gear and its stronger.I was talking about this with the guy that has the rolling road im going to next wednesday and he told me you have to run it in 4th a 3rd would give a false reading.
Click to expand...

The torque (and therefore power) calculated by the rollers is from the rpm of the rollers and the torque applied to them, therefore the gear you run in doesnt really matter as long as you dont get wheelspin, which for some reason it gives an inflated power figure :)
 
nexia201

nexia201

Member +
munday said:
The torque (and therefore power) calculated by the rollers is from the rpm of the rollers and the torque applied to them, therefore the gear you run in doesnt really matter as long as you dont get wheelspin, which for some reason it gives an inflated power figure :)
Click to expand...

well thats what this tuner said to me might be on his rolling road then :confused:
 
munday

munday

Member +
weakboy2 said:
no, wheel spin gives you a lower reading.
Click to expand...

An extract from: http://www.pumaracing.co.uk/POWER3.htm

"The BIG problem with all this is if any tyre slip is taking place. Remember these are smooth steel rollers which over time get quite polished. How much grip do you think you would get if roads were made of polished steel rather than tarmac? The effects of tyre slip are complex (i.e. I don't pretend to fully understand them myself!) but what I do know is that you can get some really strange bhp figures from highly tuned engines on narrow tyres and the readings are invariably too high not too low."
 
nexia201

nexia201

Member +
The mustang rr i have been on today doesnt have smooth rollers they have a pattern on them so there is no wheelspin on them
 
Bullet00th

Bullet00th

Member +
Will be a delay on the next rolling road due to lack of funds :( Still driving the car hard, seems to be holding up fine (touch wood).

Will hopefully be going to the dyno at TDI North soon. Last year I made 197.5bhp @ .7bar. So hopefully will get a better result there.

Knowing the fuelling was perfect on my last run, I started checking things like spark plugs, boost leaks etc. Car is perfect. Engine still 175psi on all cylinders.

Matt
 
Spoonz

Spoonz

Member +
cool stuff hope it holds up for a while may set a new standard and ppl may start puttin more boost threw there engines :rockon:
 
Spoonz

Spoonz

Member +
o yea i know a few ppl who are doing it but they dont like to post cause they think they will get slated ;)
 
spuddy

spuddy

Ulster Area Rep.
I thrashed the life outta my thing, also did 3 1/4miles days, engine never flinched once.

I took it out and sold it on when I was doing the 5E, everything looked 100%

I reckon it coulda made more power, was only holding 1.2bar on the rollers for some reason.
 
N

Nick@TD.co.uk

Registered Trader <a href="http://www.TuningD
Some good feedback coming from this thread guys, glad to hear how the car is going matt, engine performs extremely well and i think we will be taking the engine further shortly if it continues to stay together as our aim as the thread stated was to see how far these engines will last.

The tests are on going and im sure matt will keep the thread updated...

Many Thanks
~Nick @ Tuning Developments
 
W

weakboy2

Member +
munday said:
An extract from: http://www.pumaracing.co.uk/POWER3.htm

"The BIG problem with all this is if any tyre slip is taking place. Remember these are smooth steel rollers which over time get quite polished. How much grip do you think you would get if roads were made of polished steel rather than tarmac? The effects of tyre slip are complex (i.e. I don't pretend to fully understand them myself!) but what I do know is that you can get some really strange bhp figures from highly tuned engines on narrow tyres and the readings are invariably too high not too low."
Click to expand...

I'm sorry but simple logic makes that whole statement a load of bull. If the wheels are spinning, the rollers arent spinning as fast = lower power/torque figure. Simples.

My car in third gear, was spinning the wheels. Made 217bhp iirc. Ran it in fourth and no wheel spin = 252.5bhp.

I'm just going on personal experience and simple logic here. Seen many cars on the rollers getting lower than they should results and you can hear them spinning on the rollers, sounds like the clutch is slipping!
 
Bullet00th

Bullet00th

Member +
UPDATE!!!!

Just got back from the dyno. Had it done at TDi North this time. First time I took it there I got 197.5bhp @ .7bar. This time I got 254.8bhp @1.38bar with about 220ft lbs. This seems like a more accurate result. Manifold is leaking quite badly now, only hitting full boost around 4.5k now, so losing a bit of torque and power through that. Plus its mapped a tad on the rich side to keep it safe. Me and Nick are happy with the result!

Thanks for reading.

Matt

PS Will be posting up my graphs when I get chance
 
Last edited:
madman

madman

Member +
thats not a bad figure tbh would deffo of seem some more bhp if the leak wasn't their....she must shift alrite
 
Bullet00th

Bullet00th

Member +
Yeah I think if the maniold wasn't cracked and it hit 1.4bar then it would of got around 260ish. Stilll really happy with it :)
 
You must log in or register to reply here.
Top