What kind of horse power boost does intercooling and/or water injection add?
Trampas -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dave M. Sent: Wednesday, March 29, 2006 2:58 PM To: [EMAIL PROTECTED] Subject: Re: [MBZ] Water injection on OM603 - update Hi Johnny, The idea isn't to shoot water into the combustion chamber, which would quench combustion and decrease power. The idea is to shoot liquid into the piping hot compressed air stream, where it evaporates, and the evaporation process cools the intake charge. Also, the idea is to inject a water/methanol mix (approx 50/50), which offers a lower evaporation temperature, and possibly adds a little fuel? The baseline was from the sellers of the injection kits, based on estimated HP output. I started with 3gph which did basically nothing, and now 5gph at least does something (although I didn't have an IAT gauge to measure the temps with the smaller nozzle). I can keep going up in size until a power loss is felt, at that point there is too much liquid going in and I'd need to turn it down. It's also controlled by a boost switch, so it won't engage until my pre-set level of approx 10psi. I've not tested the stock manifold at all, but you can see it is quit restrictive by design... the Euro cars have a much better manifold. I have no means to flow test it, but I can try to connect a pressure gauge and measure backpressure pre-turbo. If more liquid drops IAT's significantly, but EGT's remain high, backpressure will be my next data point to measure. In theory, it should not be more than double boost pressure (14psi boost, 28psi max backpressure pre-turbo). The Finns are the ones who gave me the idea in the first place, lol... I'm also signed up on their forum. They have an English section if you want to join... but so far, they all use massive intercoolers, and don't bother with water injection. Bumper - I need an AMG front bumper for a W124, specifically the late (Gen 2) style with the triangle-shaped fog light holes. Photos of the one I need are on mh website, courtesy of Aaron. :-) -dm > ------------------------------ > Date: Wed, 29 Mar 2006 00:18:30 -0500 > From: John Berryman <[EMAIL PROTECTED]> > Subject: Re: [MBZ] Water injection on OM603 - update > > > On Mar 28, 2006, at 11:48 PM, Dave M. wrote: > > > Hi all, > > > > I got to do some testing of intake air temps and EGT's on a recent > > trip. Some details are posted here, along with a couple of photos of > > my newly installed gauges: > > > > http://buymbparts.com/forum/showthread.php?t=475&page=2 > > > > Given the claims by some folks of major reductions in EGT with water > > injection, I guess it's possible that I just haven't squirted enough > > in there yet. So, after some baseline dragstrip runs (this weekend, I > > hope) I'll be doubling the water volume (from a 5gph nozzle to 10gph) > > to see if that makes a difference. > > I would tend to think that adding more water will bring compression > up creating even more heat. I know you are up on these things. Where > did you get the baseline info on reasonable nozzle flow? I hope > someone else was the guinea pig for how much is too much. > > > I'm hoping that my stock manifolds > > aren't responsible for the high EGT's... I've already got the exhaust > > freed up post-turbo, and I was hoping to avoid custom headers (which > > inevitably require cu$tom intake AND exhau$t at con$isderable > > expen$e). > > Have you tested you're manifolds on a flow bench yet? I'm sure you > know how to figure CFMs for your displacement at varying engine > speeds. If it flows it flows. If not you will have to create or modify > > > > I'd much rather just get a nice intercooler setup, but alas the > > prerequisite AMG front bumper remains elusive... still looking for one > > at the moment. > > IIRC, Mitch Haley has some diesel nuts in Finland who might be helpful. > > What years/models will work for you? I come across some AMG stuff on > Long Island from time to time. I will keep an eye out for it if you'd > like. > > > > :-) > > > > > > -- > > Dave M. > > Boise, ID > > 1994 E500 - 95kmi (Q-ship) > > 1987 300D - 261kmi (Sportline) _______________________________________ http://www.striplin.net For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net
