Go Back   EcoModder Forum > EcoModding > DIY / How-to
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 07-08-2013, 03:49 PM   #1 (permalink)
EcoModding Lurker
 
Jack-Lee's Avatar
 
Join Date: Jun 2013
Location: Germany
Posts: 95

Partygurke - '90 VW Polo 2F
Thanks: 1
Thanked 35 Times in 23 Posts
Engine mod (BJ 1991)

Hi,

my project go forward.
Beside the aerodynamic mods i modified the engine.
Currently a 55PS Mono-Injection 1.3l assembly are installed.

New Engine:
modified "3F" 75HP Multipoint 8V

Modifications:
-new DIY Manifold (oscillating tube charging)
-new DIY Exhaustsystem
-higher compression ratio
-modified head ("Back Cut" Valves, polished exhaust port)
-modified controlbox (no wide-open-throttle enrichment, deceleration fuel cutoff from 1200U/min [currently 2000U/min], mached to "super" gasoline)

Result:
-114Nm at 2000U/min !
-Max 131Nm at 4500U/min
-Peak Power 71kW (95Hp)
-BSFC 256g/kWh at best point (about 2500U/min), 265g/kWh average from 2000-4500U/min

Stock 3F:
-97Nm at 2000U/min
-Max 99Nm at 3200U/min
-Peak Power 55kW (75HP)
-BSFC 263g/kWh at best point (about 2000U/min), 275g/kWh average from 2000-4500U/min

currently Engine (AAV 55HP)
-88Nm at 2000U/min
-Max 95Nm at 3500U/min
-Peak Power 45kW (55HP)
-BSFC 272g/kWh at best point (about 2000U/min), 280g/kWh average from 2000-4500U/min



So i save only 5% fuel, but the engine is almost new after the rebuild, so the difference is bigger.
Also i could drive with a looooonger gearbox
by the way, ive double the output power

The picture show the difference between stock and mod.
Sorry for the grid, the two diagramms had not the same y-axis.


Attached Thumbnails
Click image for larger version

Name:	3F_NM2_stock.jpg
Views:	211
Size:	99.1 KB
ID:	13408  

Last edited by Jack-Lee; 07-08-2013 at 05:13 PM..
  Reply With Quote
The Following User Says Thank You to Jack-Lee For This Useful Post:
oldtamiyaphile (01-13-2017)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 07-10-2013, 06:30 AM   #2 (permalink)
EcoModding Lurker
 
Jack-Lee's Avatar
 
Join Date: Jun 2013
Location: Germany
Posts: 95

Partygurke - '90 VW Polo 2F
Thanks: 1
Thanked 35 Times in 23 Posts
Hi,

i modified the engine again.
Smaller! runners
smaller valves
shorter Manifold with smaller diameter

Result:
136Nm! @ 4500U/min
better enginie efficenty

In the picture: comparation between my currently and the next enginie

Attached Thumbnails
Click image for larger version

Name:	AAV_3Ftuned.jpg
Views:	187
Size:	126.5 KB
ID:	13431  
  Reply With Quote
Old 07-10-2013, 08:01 AM   #3 (permalink)
Master EcoModder
 
JasonG's Avatar
 
Join Date: May 2009
Location: Charlotte NC / York SC
Posts: 725

1 Ton - '94 Chevrolet C3500
90 day: 18.76 mpg (US)

Chris - '12 Volkswagon Jetta Tdi
90 day: 45.53 mpg (US)
Thanks: 103
Thanked 52 Times in 48 Posts
Looks promising, keep up the good work Jack.
__________________



I can't understand why my MPG's are so low..........
16000lb, 41' Toy Haulers are rough on FE!
  Reply With Quote
Old 01-16-2014, 02:26 PM   #4 (permalink)
EcoModding Lurker
 
Jack-Lee's Avatar
 
Join Date: Jun 2013
Location: Germany
Posts: 95

Partygurke - '90 VW Polo 2F
Thanks: 1
Thanked 35 Times in 23 Posts
Hi,

latest Version with 141Nm@4500U/min and 92HP@5000U/min


And a few Pics from the first "real" steps.
The engine are now by the tuner.

-new pistions (incl. drill and honing)
-new valves
-new bearings
-new sealing
-higher compression
-other cam
-other alternator
-DIY intake manifold
-DIY exhaust














Attached Thumbnails
Click image for larger version

Name:	DSC_0181.jpg
Views:	222
Size:	133.8 KB
ID:	14439  Click image for larger version

Name:	DSC_0183.jpg
Views:	214
Size:	103.1 KB
ID:	14440  Click image for larger version

Name:	DSC_0184.jpg
Views:	216
Size:	111.5 KB
ID:	14441  Click image for larger version

Name:	DSC_0185.jpg
Views:	213
Size:	101.9 KB
ID:	14442  Click image for larger version

Name:	DSC_0188.jpg
Views:	214
Size:	74.3 KB
ID:	14443  

Click image for larger version

Name:	3F_NM3_bsfc.png
Views:	186
Size:	45.7 KB
ID:	14444  Click image for larger version

Name:	3F_NM3.png
Views:	182
Size:	17.8 KB
ID:	14445  
  Reply With Quote
Old 01-16-2014, 03:14 PM   #5 (permalink)
Master EcoModder
 
Join Date: Feb 2009
Location: France - Paris
Posts: 758

la_voiture_de_courses - '03 Renault Megane Estate
OldContinents
90 day: 44.11 mpg (US)

xiao lan - '01 Audi A2
90 day: 38.88 mpg (US)

Brit iron - '92 Mini Mini
90 day: 37.66 mpg (US)

Prius - '09 Toyota PRIUS Lounge
90 day: 47.37 mpg (US)
Thanks: 188
Thanked 33 Times in 30 Posts
That's way cool but could we get more pics of oily parts and namely your DIY parts, assembled engine and such.

So you have the facility to dyno run the engine or is it an engine simulator ?

I would really enjoy more details like valve size before and after and such.
Also, what is the cam duration ?
__________________
  Reply With Quote
Old 01-16-2014, 03:17 PM   #6 (permalink)
EcoModding Lurker
 
Jack-Lee's Avatar
 
Join Date: Jun 2013
Location: Germany
Posts: 95

Partygurke - '90 VW Polo 2F
Thanks: 1
Thanked 35 Times in 23 Posts
Hi,

my english is bad, so i doesnt write all the think that i could write.

Name the Parts? There's normal Motorparts (Pistions and so on)

I clean the Head and mill a little "combustion chamber". Without sharp edges the pinging risk is lower (other changes at the pistion)
The Exhaust is finished, but i had no photo on my PC :/

The Valve are standard, but the valveseat is changed an the valves milled to be lighter (lower springstiffness -> lower losses)

The data in my last post are simulated. But the Motor (when finished) are fine-tune on a dyno.

Last edited by Jack-Lee; 01-16-2014 at 03:26 PM..
  Reply With Quote
Old 01-16-2014, 03:22 PM   #7 (permalink)
Master EcoModder
 
Join Date: Feb 2009
Location: France - Paris
Posts: 758

la_voiture_de_courses - '03 Renault Megane Estate
OldContinents
90 day: 44.11 mpg (US)

xiao lan - '01 Audi A2
90 day: 38.88 mpg (US)

Brit iron - '92 Mini Mini
90 day: 37.66 mpg (US)

Prius - '09 Toyota PRIUS Lounge
90 day: 47.37 mpg (US)
Thanks: 188
Thanked 33 Times in 30 Posts
You little teaser ;-)

If your english is not good (not buying it any second) that gives you more of a reason to post more pics !
Also, cam duration, valves diameter and CR you can write in german ;-P
__________________
  Reply With Quote
Old 01-16-2014, 03:52 PM   #8 (permalink)
Master EcoModder
 
Join Date: Nov 2012
Location: San Diego, California
Posts: 754
Thanks: 124
Thanked 232 Times in 164 Posts
What are the units for your BSFC.

Those are very low numbers.
  Reply With Quote
Old 01-16-2014, 03:52 PM   #9 (permalink)
EcoModding Lurker
 
Jack-Lee's Avatar
 
Join Date: Jun 2013
Location: Germany
Posts: 95

Partygurke - '90 VW Polo 2F
Thanks: 1
Thanked 35 Times in 23 Posts
Hi,

Cam Datas:
CAM from a Polo 6N with ABU Engine
111.5° ATDC
Duration @ 1mm 211/215
Max Lobe Lift 9.4/9.6
hydro"stößel"

Valves:
Standard from "G40" (exhaustvalve with natrium)
Intake Valve:36mm (Port 30,5mm)
Exhaust Valve:29mm (Port 26,8mm)
Valves polised and the ports are aerodynamik tuned

Intake Manifold:
Length 300 (standard about 130)
Runner Dia: 30,5mm
Made of Alu or CFK, im not sure what material i use.

Exhaust "Fächerkrümmer" 4:2:1
Section 1 (from each cylinder): 32mm (the "step" from head to exhaust minimized the reflow in the cylinder)
Section 2: (for 2 cylinder) 45mm
Section 3. (for all) 50mm

@rusty lug: What numbers you mean?
  Reply With Quote
Old 01-16-2014, 04:11 PM   #10 (permalink)
Master EcoModder
 
Join Date: Nov 2012
Location: San Diego, California
Posts: 754
Thanks: 124
Thanked 232 Times in 164 Posts
The chart you posted for bfsc.

Quote:
Originally Posted by Jack-Lee View Post
@rusty lug: What numbers you mean?
Gasoline engines usually come in at right about 0.48 pounds/horsepower*hour in British units. A very good gasoline engine or a basic diesel will dip down to 0.42 lb/hp*hr. Large diesels used in power generation or ocean going power plants can dip down to 0.28 lb/hp*hr.

Your simulated engine is below that at just below 0.25, but it may be an issue of unit measurements. I just wanted to clarify.


Last edited by RustyLugNut; 01-17-2014 at 03:49 PM.. Reason: Math.
  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com