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Engine Specific Info and Questions => IDI Engine => Topic started by: nokivasara on July 01, 2007, 02:45:52 am

Title: max RPM with IDI?
Post by: nokivasara on July 01, 2007, 02:45:52 am

How high RPMs can you get out of VW diesels? Is the 1.6 more high revving than 1.9? What about the 2.4 inline 6-cyl?

I'm having a discussion with a friend, what's the highest revving diesel you know?
It should still be driveable, not like a second before it blows up during blowby :lol:

Title: max RPM with IDI?
Post by: Audi80 on July 01, 2007, 04:09:58 am

I don´t have a tach, but I calculated that I revved my 1,6 ~5500@5th gear. At smaller gears, it revs higher and is very driveable.

Title: max RPM with IDI?
Post by: nokivasara on July 01, 2007, 08:05:39 am

Not bad to reach 5500 in fifth!
Is it possible to reach over 6k rpm?

Ps. Siisti Scirocco :wink:

Title: max RPM with IDI?
Post by: jimfoo on July 01, 2007, 08:19:24 am

I thought Jake was running up to 6000 RPM. I found this dyno run of his. it was from his Rabbit 1.6lTD autocrosser.
(http://www.imagestation.com/picture/sraid77/p57536b6dd032297329606ee82e2f4f6d/fb402251.jpg)

Title: max RPM with IDI?
Post by: RabbitJockey on July 01, 2007, 09:09:02 am

i've heard rumors of some guys race engine running 7k, an di wouldn't really doubt it

Title: max RPM with IDI?
Post by: Op-Ivy on July 01, 2007, 12:07:53 pm

Look at the drop in power at 5250!!! Thats gross... I can just feel the engine screaming for bloody mercy....

I don't have a tach wither. But I have revved my (soon to be old) 4S transmission to 40km/h n 1st. Which is approx. 5k rpm. Thanks to http://scirocco.org/gears/ for the conversion!

Title: max RPM with IDI?
Post by: ezekiel on July 01, 2007, 12:55:04 pm

it's really not beneficial to rev like that if there's no power.

and power is going to suck up there simply because of how a diesel works.

the fuel needs time to ignite, that's why we have such long strokes and small bores, because a long stroke allows for more time near TDC through the arc, allowing the engine to ignite more of its fuel vs, say, a gasser with a short stroke and big bore, they hit TDC and just bounce away from it quick (rod length dependant)

and at such high rpms with such a long stroke, we run into piston velocity problems, they just can't take the speed.

Title: max RPM with IDI?
Post by: nokivasara on July 01, 2007, 01:16:33 pm

That's what I thought, no way they can rev up to 7000 like my friend said his Golf did :lol:
Actually he said that he hadn't calibrated his tach so that explains it.
The torque at low- and mid rpm is what diesels are all about...

Title: max RPM with IDI?
Post by: jimfoo on July 01, 2007, 03:06:46 pm

The engine configuration is a liquid cooled, normally aspirated, 584cc (36 cu in) double overhead cam single with four valves per cylinder. Diesel fuel supply is through a special Fuel Injection unit and single injector developed specifically for the task and the Kawasaki-based combat bike produces a respectable 28 bhp at 5500 rpm with meaty flat power delivery from 1500 and 7000 rpm.

Unlike its gas-guzzling counterpart, the engine has multi-fuel compatibility and can use commercial diesel (inc low sulfer fuel), NATO Military Spec Diesel Fuel, Bio-Diesel (B20 or B100), Aviation Kerosene including JP4, JP5, JP8, and AVTR and plain old Kerosene.

Not a VW, but revs to 7000

Title: max RPM with IDI?
Post by: OM617 on July 02, 2007, 01:08:01 am

Also not a VW, but I know of a few IDI Mercedes diesels modified to run 5700-6000rpm at full power.

Title: max RPM with IDI?
Post by: Black Smokin' Diesel on July 02, 2007, 09:15:56 am

The engine itself will take 6000 to 6500 rpm but the injection pump's camplate won't keep up and start to skip above 5500.

Title: max RPM with IDI?
Post by: Cheesetoast on July 02, 2007, 09:34:23 pm

fyi, r10 tdi's redline is 6600

http://www.exoticcarsite.com/pages/audi-r10-2006.htm

Title: max RPM with IDI?
Post by: 935racer on July 03, 2007, 12:49:27 pm

I've revved many 1.6's over 6 grand, need a lot more dynamic advance to make power that high though.

Heres a pictures from Malones old Jetta ,on its way to 6k.

(http://i94.photobucket.com/albums/l83/935racer/tach.jpg)

Title: max RPM with IDI?
Post by: mpg on July 03, 2007, 02:28:13 pm

A couple of the hardcore vw diesel guys down here claim 7200rpm calculated by a g-tech or whatever. I found it hard to believe, untill I got behind one of them on the highway (cough, sniff, cough), and found out my vr6 would hit 170kms in 3rd gear, trying to catch him. These guys have been toying with these ve pumps for a while...  Next time I see one of 'em, I'll suggest taking a pic of there tach wound right out :)

Title: max RPM with IDI?
Post by: 935racer on July 03, 2007, 02:32:47 pm

Quote

A couple of the hardcore vw diesel guys down here claim 7200rpm calculated by a g-tech or whatever. I found it hard to believe, untill I got behind one of them on the highway (cough, sniff, cough), and found out my vr6 would hit 170kms in 3rd gear, trying to catch him. These guys have been toying with these ve pumps for a while...  Next time I see one of 'em, I'll suggest taking a pic of there tach wound right out :)

Dang 7200!? I don't think I have ever been over 6700, and that was really pushing it, I'd love to rev to 7200, especially if I was still making power at 6600rpm. Any of those guys on this board?

Title: max RPM with IDI?
Post by: hillfolk'r on July 04, 2007, 08:35:25 pm

well
if you wanna get "technical"
those little rc car engines are "diesels"
and some of them rev to 30,000 rpms
so to me,thats the highest revving diesel ive seen :roll:  :lol:
ill bolt 79 of them together and hopefully hit 12's in the 1/4 :lol:  :lol:  :mrgreen:

Title: max RPM with IDI?
Post by: Benjamin on July 05, 2007, 06:14:47 am

i also hear some guys claiming (in portugal) theur opel IDI turbo diesel 1.5 do 7000rpm

Greetz, Benjamin

Title: max RPM with IDI?
Post by: koen GTD on July 24, 2007, 03:45:25 pm

hello guys

this is from my golf 1 GTD
1600 JR
k 24 @ 1.2 Bar
governod, aneroid mod
FMIC
FF 020 gearbox
....

  109 HP  @   5400tr/min  (engine)
at wheels +/- 80HP

TORQUE 160Nm  @  3900 tr/min

max speed in 4th gear  173km/u @  6000tr/min  = 110MPH

also in 5th gear: 220km/u   = 140 MPH


click to make larger

(http://img339.imageshack.us/img339/8871/gtdtx8.jpg)

(http://img407.imageshack.us/img407/8356/naamloosbr9.jpg)
could stil rev little higher, but has now effect on power...

this is with standaard diesel exhaust 40mm
has now  groep A exhaust (63.5mm)

greets from Belgium (europe)
koen

Title: max RPM with IDI?
Post by: Kudagra on July 24, 2007, 06:07:18 pm

Just get a 6-71 detroit to run away and see how high it revs...its amazing and horrific at the same time.

Title: max RPM with IDI?
Post by: Black Smokin' Diesel on July 24, 2007, 07:20:37 pm

Quote from: "Kudagra"

Just get a 6-71 detroit to run away and see how high it revs...its amazing and horrific at the same time.

That must be great to witness :lol:

Title: max RPM with IDI?
Post by: Audi80 on July 25, 2007, 12:12:04 am

Talked to local Merc drag racer at weekend. Revs at trap speed little over 7600 and had sometimes even more. MB 300 24v om606.

Title: max RPM with IDI?
Post by: Benjamin on July 25, 2007, 09:06:35 am

i wish i could do that with my VE4 pump also + dynamic advance, thats whats andy's compound was needing, rev's to spool

Is that with stock con rods, pistons, piston-rings?

Greetz, Benjamin

Title: max RPM with IDI?
Post by: Audi80 on July 25, 2007, 12:34:57 pm

Didn´t ask, but I don´t think there is stock con rods in it... ~600hp  :roll: