power graph standard car

[QuiteQuietCerb]

The car is with jools for a remap and other bits and pieces, the graph below is pre mapping, a bit low on torque but quite good on power. i ll keep the standard induction, and hoping for 400 when its tuned

[ukkid35]

I highly recommend the short induction kit, especially as your car is with Joolz now. Unless your purple hoses are brand new, they are probably collapsing under load, restricting flow and power. The short hoses are much more rigid, and have a larger cross section. Also when I mentioned them to Hagerty they did not consider them a performance modification.

[QuiteQuietCerb]

i prefer the look of the long induction and they are more geared for mid range torque, i did have the older type long pipes and they were collapsed i did a rolling road at surrey with them on, the rr there is set up the same as Jools apparently, the car made 350 brake so it lost 26 just because of the hoses collapsing! i ll see how it runs with my current setup and take it from there

[jackwibble]

Mine after Joolz mapping and short induction as you can see it's got 300 lbs torque from 2000 rpm can't see the long induction doing much better than that!

[v8chimmy]

Here you go, after Joolz map and short induction.

[gruffalo]

I take it these are all adjusted flywheel measurement, do you have the corresponding rear wheel printouts so we can at least take the conversion differences out of these and do a real comparison?

[QuiteQuietCerb]

When I had my first rr done the car showed about 75bhp less at the wheels. Will ask when the remap is done, but I guess it will be the same loss. Anyway if the short induction remaps give 400 I d hope to get this with the long ones as the car already puts out 376. Jools said its the strongest output he has seen on a standard car. I guess we ll see...

[FarmyardPants]

Mine made 369 as standard, and 411 after Jools remap, SI and full SP exhaust. You should see 400 even with the purple and brown pipes.

[QuiteQuietCerb]

Thats what i think, mine is decated albeit with standard exhaust

[ukkid35]

My engine is a complete travesty. The throttle bodies are badly worn, the tappets are completely trashed with not a flat surface in sight, the bores have massive corrosion after apparently being bathed in coolant (more likely water). The spark is from £20 Chinese coil packs. The air boxes are standard primary school jobbies. And Joolz still liberated 410 horses!

Here's mine



And here's a good thread on short induction

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

[ukkid35]

jackwibble said:

Mine after Joolz mapping and short induction as you can see it's got 300 lbs torque from 2000 rpm can't see the long induction doing much better than that!

What would I have to do to match your torque curve?

[jackwibble]

Its at this point that i cede to someone with greater mechanical knowledge than myself! It could be that although all the mapping/ graphs were done by Jools you get a difference because they were done on different days and i recall that Jools said it was more difficult to measure torque accurately compared to HP. At this point i could be talking bo**ocks without realising and Joo will come along and give the correct answer, or it could be that all your worn out bits aren't helping the engine produce the amount of torque mine does.

[HarryW]

ukkid35 said:

jackwibble said:

Mine after Joolz mapping and short induction as you can see it's got 300 lbs torque from 2000 rpm can't see the long induction doing much better than that!

What would I have to do to match your torque curve?

Sell a kidney! Or get lucky with what base engine started out like....

[QuiteQuietCerb]

well i have the results back, not quite 400, but look at that torque!

[jackwibble]

Nice one ! That's a proper grunty Cerb you've got there

[FarmyardPants]

Mine's more of a screamer, peak power @ 7350rpm!

[Byker28i]

jackwibble said:

Mine after Joolz mapping and short induction as you can see it's got 300 lbs torque from 2000 rpm can't see the long induction doing much better than that!

Joolz is a genius at bringing the torque in at 2k revs. Makes it so driveable

[grovest]

I’ve been following this thread with interest as I've considered the merits of a remap with original pipes. As I've had an idle moment I lifted the data from the various dyno results and put them into excel to compare them all on the same graph so the differences are easier to see. The results are interesting and tie up nicely with the info Joolz gave me when I spoke to him about this.

Please bear in mind this has only been done for my interest and does not take account of any other mods to exhausts etc. so no abuse please! My observations are:





At low revs up to about 3000-3500 RPM short induction with a remap produces about the same or a fraction more torque and power than the original pipes with no remap.

From here to 5500-6000 RPM there is a noticeable difference in torque and power in favour of the short remap compared with original.

Above 6000 the short remap is leaps and bounds ahead.

However, I am very impressed by QuiteQuietCerb’s remap on original pipes. All the way up to 6000 RPM torque and power are impressive and by a good margin compared with all of the short remaps I’ve plotted. Above 6000 the short remap just keeps going where the original pipes can’t provide the airflow required.

For everyday road use I would happily forfeit the extra 15-20 BHP above 6k for all that grunt below.

If anyone has dyno data they would like adding to this I’m happy to include it for comparison. I’d like to see any other remaps with original pipes if there are any out there.

Edited by grovest on Tuesday 1st April 20:27

[ukkid35]

Great analysis, thanks for sharing.

[spitfire4v8]

gruffalo said:

I take it these are all adjusted flywheel measurement, do you have the corresponding rear wheel printouts so we can at least take the conversion differences out of these and do a real comparison?

doesn't work like that .. not all dynos read the power at the wheels the same
for instance, on the same dyno your car was run on this car would have made 391hp / 370lb.ft at the wheels .. (465hp flywheel using your 17%)