Fordmods Logo

BBM, interesting 

 

Page 1 of 2 [ 28 posts ] Go to page 1, 2  Next

 
 Post subject: BBM, interesting
Posted: Fri Jan 14, 2005 8:49 pm 
Getting Side Ways
Offline
User avatar

Age: 33

Posts: 1680

Joined: 5th Nov 2004

Gallery: 1 images

Ride: 220kw 1600 Datto

Location: Scaaabz
WA, Australia

Hi all

As many of you know i got a ELXR6.
cam/mild porting/exhaust and intake ect....

I had it on the dyno about a month ago, unaware the bbm switch wasnt working. pushed 212 rwhp
Went yesterday to try again with some lil changes just to see the difference. This time with the bbm switching at 3750rpm.

Shocked look on my face when i saw the dyon results, 200rwhp!!!!!!!
Hit 3750rpm and kicked up really quick, but once it 200hp it went flat and stayed flat. also lost tourque after the initial spike.

*scratches head, so i thought the only thing it could be is to turn it back off.......225rwhp

Goes against theory, im sure its all working proplery and it shocked me to find this......


:?:

time for a custom plenum :twisted:

 

_________________

Image

Top
 Profile  
 
 
Posted: Fri Jan 14, 2005 9:28 pm 
Getting Side Ways
Offline

Posts: 6449

Joined: 11th Nov 2004

could it be switching backwards????
going to from short to long instead of long to short???????

 

_________________

PERMANENTLY BANNED

Top
 Profile  
 
 
Posted: Fri Jan 14, 2005 10:27 pm 
Parts Gopher
Offline

Age: 33

Posts: 50

Joined: 30th Dec 2004

Ride: EB Fairmont

Location: Perth
WA, Australia

thats very interesting, whar rpm does it develop its max power - with bbm working and without
Top
 Profile  
 
 
Posted: Fri Jan 14, 2005 10:42 pm 
Getting Side Ways
Offline
User avatar

Age: 33

Posts: 1680

Joined: 5th Nov 2004

Gallery: 1 images

Ride: 220kw 1600 Datto

Location: Scaaabz
WA, Australia

with out, 5250rpm
with, opens at 3750rpm, spikes and holds for the rest of it, so from about 4k

 

_________________

Image

Top
 Profile  
 
 
Posted: Fri Jan 14, 2005 10:43 pm 
Getting Side Ways
Offline
User avatar

Age: 33

Posts: 1680

Joined: 5th Nov 2004

Gallery: 1 images

Ride: 220kw 1600 Datto

Location: Scaaabz
WA, Australia

tickford_6 wrote:
could it be switching backwards????
going to from short to long instead of long to short???????

i thought that too, but i checked it over and over again but its rite. :?

 

_________________

Image

Top
 Profile  
 
 
Posted: Fri Jan 14, 2005 11:12 pm 
Site Admin
Offline
User avatar

Age: 34

Posts: 8831

Joined: 18th Dec 2002

Gallery: 6 images

Ride: AUII V8 LTD

Power: 270 rwkw

Location: Sydney
NSW, Australia

You realise if your EMS8860 was tuned with the BBM not working that you will need to re-tune the car with the BBM enabled?

The spark and fuel requirements are drastically different when the runners switch over.

 

_________________

WAG363: AUII LTD Supercharged 363 Dart Stroker [Supercharged 363 LTD Build]
WAGGIN: 2012 Volkswagen Passat Wagon - V6 4Motion.

Top
 Profile  
 
 
Posted: Fri Jan 14, 2005 11:15 pm 
Getting Side Ways
Offline
User avatar

Age: 33

Posts: 1680

Joined: 5th Nov 2004

Gallery: 1 images

Ride: 220kw 1600 Datto

Location: Scaaabz
WA, Australia

yeah it was

origianly it was tuned to long runners full time.
theni figured out the bbm wasnt running rite so i fixed it and retuned everything above 3750 so it was all spot on again.

But the figure of 225rwhp was the map made for the working bbm, but only running the long runners.
Fixed that this morning tho, HEAPS better!

 

_________________

Image

Top
 Profile  
 
 
Posted: Fri Jan 14, 2005 11:20 pm 
Site Admin
Offline
User avatar

Age: 34

Posts: 8831

Joined: 18th Dec 2002

Gallery: 6 images

Ride: AUII V8 LTD

Power: 270 rwkw

Location: Sydney
NSW, Australia

If its just set up for the long runners, thats why you're losing peak power.

 

_________________

WAG363: AUII LTD Supercharged 363 Dart Stroker [Supercharged 363 LTD Build]
WAGGIN: 2012 Volkswagen Passat Wagon - V6 4Motion.

Top
 Profile  
 
 
Posted: Fri Jan 14, 2005 11:38 pm 
Getting Side Ways
Offline
User avatar

Age: 33

Posts: 1680

Joined: 5th Nov 2004

Gallery: 1 images

Ride: 220kw 1600 Datto

Location: Scaaabz
WA, Australia

i made more power with long runners, thats what im saying.

 

_________________

Image

Top
 Profile  
 
 
Posted: Fri Jan 14, 2005 11:41 pm 
Site Admin
Offline
User avatar

Age: 34

Posts: 8831

Joined: 18th Dec 2002

Gallery: 6 images

Ride: AUII V8 LTD

Power: 270 rwkw

Location: Sydney
NSW, Australia

Yeaaaaah, but if you have it set up so it switches to short runners at the correct RPM ~3300, and then spend some time with the fuel and spark maps above 3300rpm, you should have even further gains, thats why you are only getting a flat 200rwhp when it switches to short.

 

_________________

WAG363: AUII LTD Supercharged 363 Dart Stroker [Supercharged 363 LTD Build]
WAGGIN: 2012 Volkswagen Passat Wagon - V6 4Motion.

Top
 Profile  
 
 
Posted: Fri Jan 14, 2005 11:44 pm 
Getting Side Ways
Offline
User avatar

Age: 33

Posts: 1680

Joined: 5th Nov 2004

Gallery: 1 images

Ride: 220kw 1600 Datto

Location: Scaaabz
WA, Australia

SVO XR6 wrote:
yeah it was

so i fixed it and retuned everything above 3750 so it was all spot on again.


Fixed that this morning tho, HEAPS better!


ehh ^^^

:wink:
was tuned for short runners above 3750

 

_________________

Image

Top
 Profile  
 
 
Posted: Fri Jan 14, 2005 11:49 pm 
Site Admin
Offline
User avatar

Age: 34

Posts: 8831

Joined: 18th Dec 2002

Gallery: 6 images

Ride: AUII V8 LTD

Power: 270 rwkw

Location: Sydney
NSW, Australia

Ah F**k.

I'm just not with it. LOL


:oops:


So you found that switching at 3750rpm did it for you? Any reason for taking it higher than the ~3300rpm set by the EEC ?

I get a massive dip in my dyno curves when the BBM switches over. I'd love to experiment and see which setup would provide the most power, with the least power drop.. whether its better to switch just before peak torque, or just after.

 

_________________

WAG363: AUII LTD Supercharged 363 Dart Stroker [Supercharged 363 LTD Build]
WAGGIN: 2012 Volkswagen Passat Wagon - V6 4Motion.

Top
 Profile  
 
 
Posted: Fri Jan 14, 2005 11:52 pm 
Getting Side Ways
Offline
User avatar

Age: 33

Posts: 1680

Joined: 5th Nov 2004

Gallery: 1 images

Ride: 220kw 1600 Datto

Location: Scaaabz
WA, Australia

:P

yeah, i read thats where jmm move it too, so i tryed it.
Ill put up a dyno sheet to show you the difference when i figure out how to.

An example, driving in wet (P-Zeros, f**k sticky) in 2nd.
flored it from 2500rpm, total traction from speed.
Hit 3700rpm and kicked the rear end out about 3 foot!!!

 

_________________

Image

Top
 Profile  
 
 
Posted: Fri Jan 14, 2005 11:57 pm 
Site Admin
Offline
User avatar

Age: 34

Posts: 8831

Joined: 18th Dec 2002

Gallery: 6 images

Ride: AUII V8 LTD

Power: 270 rwkw

Location: Sydney
NSW, Australia

SVO XR6 wrote:
:P

yeah, i read thats where jmm move it too, so i tryed it.
Ill put up a dyno sheet to show you the difference when i figure out how to.

An example, driving in wet (P-Zeros, f**k sticky) in 2nd.
flored it from 2500rpm, total traction from speed.
Hit 3700rpm and kicked the rear end out about 3 foot!!!


is that with the BBM working, or not?

If it is with the BBM working, I wonder what the effect would be moving it up or down 500rpm.. whether you would suddenly kick at the switch RPM, or whether it would remain at 50rpm below switch point.

 

_________________

WAG363: AUII LTD Supercharged 363 Dart Stroker [Supercharged 363 LTD Build]
WAGGIN: 2012 Volkswagen Passat Wagon - V6 4Motion.

Top
 Profile  
 
 
Posted: Sat Jan 15, 2005 12:03 am 
Getting Side Ways
Offline
User avatar

Age: 33

Posts: 1680

Joined: 5th Nov 2004

Gallery: 1 images

Ride: 220kw 1600 Datto

Location: Scaaabz
WA, Australia

with it on
It kicked the back out as soon as it opened!

on the dyon graph, it jumps about 15hp within 30rpm!! then stopped at 200rwhp

You need to see the graph, its crazy

 

_________________

Image

Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 2  [ 28 posts ]  Go to page 1, 2  Next

Who is online

Users browsing this forum: Google [Bot] and 33 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Fri Dec 15, 2017 9:41 pm All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names