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Search: Posts Made By: RarlyL8
Forum: Porsche 911 Technical Forum 08-19-2018, 04:02 AM
Replies: 14
Views: 304
Posted By RarlyL8
Pretty tough finding 1988 tire sizes in 2018. ...

Pretty tough finding 1988 tire sizes in 2018. What look are you after? The RSR look and the 930 look are a little different. I've been running those sized wheels on widebodies for decades and have...
Forum: Porsche 911 Technical Forum 08-18-2018, 10:29 AM
Replies: 7
Views: 325
Posted By RarlyL8
I'm working on a model that sounds much like what...

I'm working on a model that sounds much like what you are describing. Our ST (street) version mufflers are much more docile than the Sport mufflers which gives a nicer idle but also gives up the...
Forum: Porsche 911 Technical Forum 08-16-2018, 09:49 AM
Replies: 11
Views: 317
Posted By RarlyL8
Yes the straight tailpipes mufflers clear the...

Yes the straight tailpipes mufflers clear the early rear bumper. Close but they do clear.


.
Forum: Porsche 911 Technical Forum 08-15-2018, 02:20 PM
Replies: 11
Views: 317
Posted By RarlyL8
The '75 is hobbled with the two into one exhaust...

The '75 is hobbled with the two into one exhaust that travels down the driver's side of the engine to the muffler. Here is what you have:
...
Forum: Porsche 911 Technical Forum 08-13-2018, 08:21 PM
Replies: 4
Views: 268
Posted By RarlyL8
Looks home-made. OEM exhaust manifolds with the...

Looks home-made. OEM exhaust manifolds with the heat exchangers removed. Merge is fabricated to connect to the single inlet muffler. The improvement would be everything past the OEM manifolds,...
Forum: Porsche 911 Technical Forum 08-12-2018, 04:38 PM
Replies: 6
Views: 389
Posted By RarlyL8
Oops, had "R' on the mind, thanks!

Oops, had "R' on the mind, thanks!
Forum: Porsche 911 Technical Forum 08-12-2018, 12:38 PM
Replies: 6
Views: 389
Posted By RarlyL8
Where are you bidding on an M&K muffler? Are you...

Where are you bidding on an M&K muffler? Are you negotiating to purchase one used?
The inlets are curved to meet the main body. Shell has a 6" radius. Exit pipes are straight out the back 31" on...
Forum: Porsche 911 Technical Forum 08-12-2018, 12:19 PM
Replies: 46
Views: 2,381
Posted By RarlyL8
Sound perception is such a personal thing that...

Sound perception is such a personal thing that you really need to actually hear all the different systems in person to decide which sounds best to you. YouTube just doesn't do it justice. I'd...
Forum: Porsche 911 Technical Forum 08-03-2018, 09:58 AM
Replies: 33
Views: 5,229
Posted By RarlyL8
That would be the quiet version of the 911S...

That would be the quiet version of the 911S (MKM29ST). Never tested the Dansk version so I can't say if it is more quiet. I can say that the ST mufflers stay under 80dB in all situations other than...
Forum: Porsche 911 Technical Forum 08-03-2018, 06:23 AM
Replies: 33
Views: 5,229
Posted By RarlyL8
The MKM34ST is special order only at this time...

The MKM34ST is special order only at this time and is more expensive than our standard version. Shops in Europe and US racers fighting noise restrictions have given good feedback on the options they...
Forum: Porsche 911 Technical Forum 08-02-2018, 06:07 PM
Replies: 33
Views: 5,229
Posted By RarlyL8
We now have a more quiet version of the MKM34...

We now have a more quiet version of the MKM34 dual inlet muffler with GT3-Look tailpipes called the MKM34ST. You still get the same flat 6 sound but at a lower volume. Sound level in the cabin of...
Forum: 911 / 930 Turbo & Super Charging Forum 08-01-2018, 05:28 PM
Replies: 6
Views: 307
Posted By RarlyL8
The sump pan disappeared at the 911 SC/Carrera...

The sump pan disappeared at the 911 SC/Carrera break of 1983/1984, SC's have a sump pan Carreras don't.
Forum: 911 / 930 Turbo & Super Charging Forum 07-31-2018, 01:24 PM
Replies: 9
Views: 749
Posted By RarlyL8
Your engine shouldn't run anywhere near normal on...

Your engine shouldn't run anywhere near normal on one pump, that front pump must be a good one!
Only cure I know for the Chinese junk is to upgrade to modern relays.
Forum: Porsche 911 Technical Forum 07-24-2018, 05:39 AM
Replies: 34
Views: 1,271
Posted By RarlyL8
Shop parts pricing per the part depends on where...

Shop parts pricing per the part depends on where they buy it. Shops have to make money on parts to be worth the hassle of paperwork, phone calls, returns and ill-fitting junk that has to be modified...
Forum: 911 / 930 Turbo & Super Charging Forum 07-24-2018, 05:24 AM
Replies: 3
Views: 239
Posted By RarlyL8
If you prefer quick over fast my formula is SC...

If you prefer quick over fast my formula is SC cams, RL8 headers, K27-7200 or GT30 sized turbo, good intercooler and RL8 muffler. If you are running the 915 or G50 all the better. My SC/930 was an...
Forum: 911 / 930 Turbo & Super Charging Forum 07-22-2018, 03:14 PM
Replies: 6
Views: 223
Posted By RarlyL8
Here is a video of warm-up AFR vs Control...

Here is a video of warm-up AFR vs Control Pressure. It's like watching paint dry so click on the time line at one minute intervals for an overview of typical readings. This was done in the winter,...
Forum: 911 / 930 Turbo & Super Charging Forum 07-22-2018, 09:31 AM
Replies: 6
Views: 223
Posted By RarlyL8
WCP should be around 53psi as you listed. If the...

WCP should be around 53psi as you listed. If the AFR at cruise has not changed then the WCP has not changed. A reduction from 53psi to 38psi is very significant. I'd get a second opinion on the...
Forum: 911 / 930 Turbo & Super Charging Forum 07-18-2018, 05:06 AM
Replies: 12
Views: 560
Posted By RarlyL8
Very unusual to see a 930 variant, let alone a...

Very unusual to see a 930 variant, let alone a DP935, with modern components integrated. Someone went to a lot of trouble to mold a unique rear look into the car. I always liked the treatment with...
Forum: Porsche 911 Technical Forum 07-15-2018, 09:14 AM
Replies: 19
Views: 3,253
Posted By RarlyL8
We finished dyno testing on our system using a...

We finished dyno testing on our system using a bone stock '87 Carrera. Result was a consistent 201.5hp. This is with the OEM muffler and stock chip. Our system also uses a premuffler with valve to...
Forum: Porsche 911 Technical Forum 07-10-2018, 02:11 PM
Replies: 23
Views: 1,869
Posted By RarlyL8
Thanks! I've never had much luck capturing the...

Thanks! I've never had much luck capturing the "real" sound on video. Most things I see on YouTube are way more quiet than actually being there. The video we got revving the Carrera demonstrates...
Forum: Porsche 911 Technical Forum 07-09-2018, 05:26 PM
Replies: 23
Views: 1,869
Posted By RarlyL8
Looking into race cats. Space is probably going...

Looking into race cats. Space is probably going to be an issue but we will see. The sound most definitely will be affected as catalytic converters make for a terrible exhaust note. Will have to...
Forum: Porsche 911 Technical Forum 07-08-2018, 11:39 AM
Replies: 23
Views: 1,869
Posted By RarlyL8
YOU decide how loud the open valve is by adding...

YOU decide how loud the open valve is by adding the optional tailpipe silencer. I designed this silencer using the dyno to tell me how far I could restrict it until the system started losing power. ...
Forum: Porsche 911 Technical Forum 07-06-2018, 05:29 PM
Replies: 23
Views: 1,869
Posted By RarlyL8
Yes the little tailpipe does look and sound like...

Yes the little tailpipe does look and sound like a waste gate dump pipe, ha!

Here is a picture of an earlier prototype that had the valve angled higher. I changed that angle in order to add the...
Forum: Porsche 911 Technical Forum 07-06-2018, 06:16 AM
Replies: 23
Views: 1,869
Posted By RarlyL8
Yes access to the valve covers should be the same...

Yes access to the valve covers should be the same as with our premuffler. The valve and tailpipe are on the opposite side of the pipe.

The picture posted shows the system with the optional...
Forum: Porsche 911 Technical Forum 07-05-2018, 07:03 PM
Replies: 23
Views: 1,869
Posted By RarlyL8
The only thing that may change the static dB...

The only thing that may change the static dB level in your current system is the premuffler part of the active exhaust. The premuffler is a bit more quiet than a test pipe. With this system the...
Showing results 1 to 25 of 500

 
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