Mythbuster: continuing project thread of my 1303 '75

[Humble]

Good luck with the dyno, and +1 for video

You should be happy with the bosch 044 motorsport pump. I've got one in my car running 50psi and 750cc RC injectors. I also had one with my old setup and it ran flawlessly for 6 years. I prefer the 044 to a walbro any day because they're quieter and more reliable.

[Wally]

Originally Posted by Humble

Good luck with the dyno, and +1 for video

Allright, allright, I'll ask a friend to hold the video button pressed for the run

You should be happy with the bosch 044 motorsport pump. I've got one in my car running 50psi and 750cc RC injectors. I also had one with my old setup and it ran flawlessly for 6 years. I prefer the 044 to a walbro any day because they're quieter and more reliable.

I did read some walbro's break down too, so thats why the 044 indeed. And you are right about it being more quiet! This one is even more quiet than the bosch pump I had that was taken out of a porsche 911! Even though that one was made in germany and this one is made in tjecheslovakia (sp?) (by Bosch).
Thanks for the confirmation!

[Humble]

My roommate has a walbro pump in his rally car mounted in the trunk next to the fuel cell and when it's running it's as loud as the engine at idle, it really is that bad. I have mine mounted up front with rubber isolators and you can barely hear it when the motor is off, it's surprisingly quiet.

[Wally]

Allright, results are in and disappointing: same results as with the 2 ltr set-up!
235 RWHP and 270 FWHP (6K rpm) and the same-ish 255 ft.lbs or 350 Nm torque at a bit over 4K rpm at 14.5 psi:




Driving onto the mobile dyno:
http://www.youtube.com/watch?v=kOYaWh5hFSk
Dynorun itself:
http://www.youtube.com/watch?v=xSoyPv_QhNo

RWHP:

Flywheel hp and torque:


It was a beautifull morning and the engine ran great, but I think it may not have gotten the right amount of fresh air because of a closed deck lid and a mediocre Jamex air filter (not the big K&N one I had before).
Or the turbo is just not making enough air (too small). Next time with the proper K&N and an open deck lid on 14th June, lets see if it makes a difference

[Sandeep]

Where is the ECU reading reading the MAP from ? Under the throttle butterflies or right at the turbo outlet ? If you are reading right at the turbo outlet, the MAP will be more than under the butterflies on boost because of piping and intercooler losses.

I have the same manifold "box" as you but read my map after the butterfly .. I tried both locations and the map at the turbo was 2psi greater than after the butterfly .... looks like my intercooler/piping loss is 2psi

Still wondering why the HP and TQ are the same as your 2 litre

Sandeep

[petevw]

Same Dyno used for the other 2L run?

[Humble]

Don't be too down about the numbers until you do a little more digging. Were you datalogging the runs at all? Was there a compression change between the 2 engines? I'd leave the decklid on for dyno runs since it will give a more accurate "street" reading. I'm not sure that you're maxing the turbo yet even with a 2.2, I'd look at the cam, rockers and valves for lost hp.

Looks and sounds great in the video though, it sounds like it wants to keep going when you shut it down.

[Wally]

Originally Posted by Sandeep

Where is the ECU reading reading the MAP from ? Under the throttle butterflies or right at the turbo outlet ?
Sandeep

It reads from under the 4 butterflies of the TB's

Ah, well, the 1/4 mile drag today went VERY well. Clutch holded out with the street tires, but with the slicks, it was too much and you could smell it (again).
I managed a 12.589/111 mph with the street tires and a 12.184 (no trap speed recorded) with the drag slicks. I am very happy with that
Especially as I was the fastest car of today (40 cars, 30 watercooled)
Had lots of fun today. Hopefully the guys made some pics I will link to later.

[Wally]

My new rear window decall especially made for the large number of Civic participants