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Quote:
Originally posted by lite75
Craig,
It sounds like DDDD has a fuel injector bleeding off fuel pressure at the WUR.

Dan
Agreed. The fuel is being recycled, not injected into the engine. Lowering the pressure to the fuel head from the WUR will affect the amount of fuel from the injectors. A lower pressure to the head from the WUR will richen the mixture IIRC.
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG.
Fitting - New service kit.
Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head.

1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods.
Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit.

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Old 06-09-2007, 02:15 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #61 (permalink)
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Brian,
I talked to a poster over at Rennlist who might take a look at your exhaust pipe. I know I am interested in your dyno run.

What exhaust are you going to compare it to?
Old 06-09-2007, 10:49 AM
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Crotchety Old Bastard
 
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I gave that fellow a call. Thanks!

The baseline muffler is a stock Euro unit with a dump tube on the waste gate. My engine has very typical upgrades and should be a good example to use for this type of testing. The baseline dyno runs were done a few weeks ago at a stock 0.7bar. I know what the butt dyno said about the new muffler and I'm anxious to see it on paper.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 06-09-2007, 06:51 PM
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Brian, do you have any other mufflers that are less restrictive than the stock Euro style?

It would be cool to try an aftermarket style like a fabspeed or magnaflow. They most likely make better power than a stock muffler.
Old 06-09-2007, 07:04 PM
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DDDD - I got my Zork from M&K a couple months back, and haven't seen a flame at this point. I have the Andial enrichment setup with adjuster and a 7th injector. I was surprised (horrified) to find a Ford part on my car! 8) 30lbs red injector. I had Ben put an O2 sensor bung on the pipe for the LM-1 and AFR's were looking good at full boost. The intoxication that Brian mentions about the sound of Zork is probably from hearing the turbo wind up/down. Vicious.

Craig - I took a pic of the injector with the I/C + other parts removed for your examination/thoughts. Overseas right now, but I'll download the pic from the camera when I'm back next week.

Brian - do you fab that muffler, or is that sourced from Ben's shop? Do you offer a polished model?

rob
79 930
Old 06-09-2007, 10:23 PM
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Anything that is less restrictive than an stock Euro muffler will also be louder than a stock Euro muffler.

I have some experience with MagnaFlow dual outlet mufflers. They are very free flowing and sound good. The possible down side is the "Y" pathway disrupts the flow somewhat. If that disruption is significant I do not know. I do not have plans to dyno a MagnaFlow at this time due to the time and expense involved. I might do that later.

I have done all of the design, develpoment and fitment work on my mufflers and I own the jigs. Ben (M&K) will produce everything I develop in order to insure quality control (great welds every time). We have a good relationship and our focus is from an enthusiasts point of view. Polishing is an option.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 06-10-2007, 06:52 AM
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Local shop has seen about 12-15 HP difference from a stock muffler or even a GHL/B&B - to one like Brian is having made.

PLUS quite a bit less heat due to the elimination of the big 'heat can'.

So it IS worth it -
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno
Old 06-10-2007, 12:03 PM
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Quote:
Originally posted by lite75
Craig,
It sounds like DDDD has a fuel injector bleeding off fuel pressure at the WUR.

I use the Greddy Rebic IV and its fully programable, very simple set up.

Dan
My shop said my boost set up was with a Greddy system. I thought they meant the boost control knob at the time, I never asked about the extra injectors specifically, I just told them to make sure the system works right and replace all the fuel lines and hoses. They said it was a professional set up, and didn't have any concerns about it.

99% leakdown made me feel comfortable about it.
Old 06-10-2007, 12:04 PM
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Cardsrule - did you get your rear bumper mounted?
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 06-10-2007, 03:13 PM
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No i didn't get the bumper mounted...my parents were in town so i didn't get to put any time on the car. I plan on getting the rear mounted tomorrow. How would/did you guys get everything lined up to drill the holes in the bumper? I was thinking about getting one side lined up, drilling a hole and then bolting it to the car. The i could go to the bolt on the other side of the bumper end and get that bolted in. Then would my way around to the middle. What do you think?
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Old 06-10-2007, 04:33 PM
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Clamp the bumper on using vice grip style body clamps. You can then make suptle adjustments and re-clamp. When it is perfect you drill the holes, put the bolts in, then release the clamps. Use large fender washers and self locking nuts with the nylon on the threaded portion so they won't come out. Lock washers rust and can tear up the fiberglass.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 06-10-2007, 08:00 PM
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Where did you get your vice grip style body clamps? Other than that i think i know what i need to do.

Thanks again
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Old 06-11-2007, 03:52 PM
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I got lucky and found an old picture for you.
This was taken when we were putting my car together, 10 years ago. If you look in the tail light area you can see 2 of the clamps.
Any vice grip will work, just wrap the teeth with electrical tape so they won't scratch your bumper. Apply just enough pressure to hold the bumper in place.




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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 06-11-2007, 07:27 PM
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With some help i got the rear bumper mounted today. I still have to figure out how to fix the middle of the bumper to the body. I have some ideas that should work for tomorrow. Other that that it was pretty straight forward.

I am really happy with the fit. Its hangs over the fender alittle but i don't think it will be that noticeable. If i wanted to make it perfect i would have to cut the bumper in two and take out about an 1/2", which i really didn't want to do.



Tomorrow i should have it finished and start working on the front. I am going to make the front brackets out of 1/8" aluminum, should be fun.

Keep you guys posted.

Scott
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Old 06-12-2007, 05:59 PM
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Scott-

Who made the rear bumper that you are mounting?
Old 06-12-2007, 07:12 PM
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The rear bumper is a MA SHAW. Its a pretty basic looking bumper. Fit is pretty good, don't really have anything to compare it to.

The front 934 TRE bumper. I think its going to look really good once i get it mounted.

Let me know if you have any other questions.
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Old 06-12-2007, 08:03 PM
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I made some big head way on the install of the FG. For the front bumper i had to make some brackets. It wasn't too hard, just took alot of time to get the angles right.


I should have the front done tomorrow. I also got my DP style tail from betterbodies a few days ago. For what i spent on it i am really happy. I have yet to get the fit just right but i think it will be ok, the lines are so-so.



So its really coming together now. I post some photos when i get all the FG on tight.
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Old 06-18-2007, 07:51 PM
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Looking forward to the pics!
Old 06-18-2007, 08:08 PM
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Here is the front bumper on the car


This is what i am thinking for the bottom of the bumper so it doesn't shake. Going to use hose clamps to attach it to the toe bar and a small hole and bolt in the bottom of the bumper. I am making this up as i go (kinda fun)...
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Old 06-18-2007, 08:38 PM
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Cool stuff, looking good.

On the DP tail, is it just the photo or is the bottom rear edge really wavy? Assuming your reflector is straight, it looks like the lower edge of the tail is all over the place.
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Old 06-19-2007, 05:42 AM
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