|
|
|
|
|
#1
08-27-2012, 04:27 PM
|
|||
|
|||
|
Best hp gains out of a 617
Ive heard that the best gains out our beloved 617 s is via the exhaust .The gains by adding a bigger exhaust pipe and have it straight out the back for performance purposes might interest me. I dont mind a little exhaust noise since Im use to my 300cd making a good amount of exhaust noise already.Anyone put this in play on their car yet? and Was it worth the effort?
|
|
#2
08-27-2012, 05:35 PM
|
|||
|
|||
|
I haven't done it, but straight through exhaust has been done plenty of times. General consensus, from what I've gleaned, is that 2.5" or 3" mandrel bent exhaust without mufflers is the way to go. Personally, on an otherwise stock motor, I doubt you'll see gains from going 3" over 2.5". This motor just isn't that big. It won't hurt to go bigger, though you'll have an easier time packaging the 2.5" stuff. The biggest contributor will be the mandrel bends versus stock crush bent tubing. Check out the builder kits over at Tube Bending & Fabrication - Columbia River Mandrel Bending.
Not to say that you won't feel a difference, but stock exhaust isn't that bad, anyway. Bang for buck, you'd be better off getting a manual boost controller (ebay it), bump it up to 14psi, ALDA adjust/delete, rack limiter adjust/delete. From anecdotal evidence between different owner's observations, it's good for +20-30 crank hp.
__________________
1984 300TD Turbodiesel - 272k - Daily Duty 1985 300D Turbodiesel - 315k - "Recommended for competition events only"
|
|
#3
08-27-2012, 06:04 PM
|
||||
|
||||
|
Stock intake and exhaust flows more than you will need without serious fuel and air upgrade.
A test pipe in place of the resonator will take 2 45* bends out of the piping...
__________________
http://superturbodiesel.com/images/sig.04.10.jpg 1995 E420 Schwarz 1995 E300 Weiss #1987 300D Sturmmachine #1991 300D Nearly Perfect #1994 E320 Cabriolet #1995 E320 Touring #1985 300D Sedan OBK #42
|
|
#4
08-27-2012, 08:35 PM
|
|||
|
|||
|
Quote:
|
|
#5
08-29-2012, 09:59 AM
|
|||
|
|||
|
A blk 83 300cd turbo with euro setup bumper and lights ,this car begs to be lowered a bit.I have a set of 99 clks waiting in the wings.Also have a set of 18" amgs but will need spacers to fit, not excited about using spacers.In doing everything right for performance I believe it will be a vintage eye catcher with alittle bit of rumble for adder.
|
|
#6
08-30-2012, 06:25 PM
|
|||
|
|||
|
Quote:
How much louder does it get without the resonator but retaining the rear muffler?
|
|
#8
09-13-2012, 02:56 PM
|
||||
|
||||
|
I just cut out my pair of resonators and straight piped a 2.5" 4 foot long section in place of them. It gave it a quite bassy sound and my butt dyno says it really moves from 55-85 mph.
Then again I have only had this 83 300sd for like 5 days, it could have to do with the low sulfur I put in as opposed to the tank of b100 I had run through it
|
|
#9
09-14-2012, 06:53 AM
|
||||
|
||||
|
My dyno butt says my straight exhaust, and cold air setup, gave it 15 hp.
__________________
1999 w140, quit voting to old, and to old to fight, a god damned veteran
|
|
#10
09-14-2012, 08:19 AM
|
||||
|
||||
|
Quote:
PS from the little I know best improvements from stock seem to be the IP not exhaust. Have a look at the threads on www.superturbodiesel.com
__________________
1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior  Don't leave that there - I'll take it to bits!
|
|
#11
09-16-2012, 01:53 AM
|
||||
|
||||
|
Quote:
You can do what you like to the exhaust, fact is that the waste gate limits the amout of air going in & thats it ! With no extra air you can only get a very little extra via increased fuel ~ IP adjustment. Bigger exhaust gives nothing but noise on a turbo with such a low waste gate setting. I have diesels here (not 617's) that run 25 to 30 # boost all day every day under load. Only restricted by EGT & MAF constraints. To increase boost by a reasonable amount on a 617 you would probably need to install an inter-cooler like later MB's have.
__________________
Grumpy Old Diesel Owners Club group I no longer question authority, I annoy authority. More effect, less effort....  1967 230-6 auto parts car. rust bucket. 1980 300D now parts car 800k miles 1984 300D 500k miles  1987 250td 160k miles English import  2001 jeep turbo diesel 130k miles  1998 jeep tdi ~ followed me home. Needs a turbo. 1968 Ford F750 truck. 6-354 diesel conversion. Other toys ~J.D.,Cat & GM ~ mainly earth moving
|
|
#12
09-16-2012, 10:56 AM
|
||||
|
||||
|
the 617 is not a hot rod engine its a workhorse.You can drive a 100 mph all day,but not on redline.If your want power switch a 6 cylinder from newer models.
__________________
1999 w140, quit voting to old, and to old to fight, a god damned veteran
|
|
#14
09-18-2012, 06:39 PM
|
|||
|
|||
|
The added gains in hp would be nice to have ,its not the need for speed but just a desire to improve an avg 300cd at a minimium cost.I cant see why someone hasnt done a build up like this to show improved performance for a 617 ,doesnt sound like the cost would be a big factor . A tuner page with a DIY guide to enhance a 617 and what those cost might be individually.
|
|
#15
09-19-2012, 01:15 PM
|
||||
|
||||
|
__________________
$60 OM617 Blank Exhaust Flanges $110 OM606 Blank Exhaust Flanges No merc at the moment
|
 |
| Bookmarks |
|
|
Linear Mode
