Latest Project - Headers

[RarlyL8]

"RarlyL8" is a license plate.
I made up that name and put it on my first widebody 911 decades ago. I now have plates from 3 different states with that name on it hanging in my garage. It was my handle when I joined Rennlist and Pelican back in the mid-90's. The business has taken on a life of it's own. I started doing this as a way to pay for my Porsche habit and it just took off.
Yes now that name is a bit awkward but it is how folks know me so it stuck. I have abbreviated it to an "RL8" logo that I may start stamping on all my products.

[DDDD]

Originally Posted by RarlyL8

"RarlyL8" is a license plate.
I made up that name and put it on my first widebody 911 decades ago. I now have plates from 3 different states with that name on it hanging in my garage. It was my handle when I joined Rennlist and Pelican back in the mid-90's. The business has taken on a life of it's own. I started doing this as a way to pay for my Porsche habit and it just took off.
Yes now that name is a bit awkward but it is how folks know me so it stuck. I have abbreviated it to an "LR8" logo that I may start stamping on all my products.

I think you mean "RL8", right?

I think you should use your last name as a company name personally but whatever works. People will find a good product under any name.

[gsmith660]

Brian personally I think you do fantastic work and will be proud to own your product in the future hopefully it will work with the direction I am going (2.7 L motor)

[RarlyL8]

Whoops, big fingers and typing while eating breakfast didn't work so well together.
Yes, RL8.
My last name is already associated with another LLC so can't do that. They all cross reference on the search engines so we'll see how it goes.
All of the proceeds from the business go back into the business which is very liberating for me. I have no financial pressure to put out product before it is ready or to sell anything at all if I don't want to. I take trade-ins on my old products if someone wants to try out a different tailpipe or louder muffler body. It's enjoyable to be a part of this forum and other folk's engine builds and to help them personalize their Porsche. It's also nice to really not care when folks are mean spirited or bash our work. If you like it buy it, if you don't then don't. I'm not going to spend huge bucks to verify old proven designs still work. I live in "Rocket City" and know rocket science; this ain't it.

[tj930]

Originally Posted by Kraftday

Really interesting design.

But have I understood correctly - the O2 sensor gets mounted on the wastegate pipe (which doesn't get a flow of exhaust gasses going past it until the wastegate opens)?

I'd also have thought that the exhaust gasses would enter a 'cul-de-sac' (with resulting back pressure) due to the wategate pipe positioning?..

Just thinking aloud, here...

[drmatera]

no bung on the wastegate pipe, thats the bracket tab......

[tj930]

Cheers.

But surely there's still a bit of back pressure? (Don't most modern-day-turbo designs have the Wastegate built into the turbocharger?)

[Kraftday]

gsxrken, well put group of points.

I probably should have pointed out how totally different these designs are and the many clever feature updates.

Brian, admittedly I haven't read through all the 25 pages here. The fact that you are doing it, producing and offering such parts is commendable. I would not say what you want to offer is "inferior" to what is available. One day it would be nice if the industry had more high end options out there and good luck with your campaign. “Just do it.”

The 930 production heat exchangers Billy Boat (a former MODE employee) offers are also a successful design. They can be made to work and are priced accordingly. Not saying he is a copycat! GHL (Jeff & Brian Gerber, also in Arizona) heat exchangers emulated another successful design in the earlier versions and then later changed for the worst.

Exhaust fabrication is a working art and each set produced has its own character.

[911nut]

Originally Posted by Kraftday

The 930 production heat exchangers Billy Boat (a former MODE employee) offers are also a successful design. They can be made to work and are priced accordingly.

Exhaust fabrication is a working art and each set produced has its own character.

Successful? Not for his customers.
Exhaust fabrication is performed with jigs and fixtures. Accuracy and weld quality are everything, IMO. Character is the last thing one would want in an exhaust system.

[Kraftday]

Sounds like a bit of buyer remorse there. I've see hundreds 930/965 with the BB. Sure swearing is heard during installation. Even seen a few cracked but these were gray tubes from running lean. Wouldn't say they are the tops but they work.

Many combinations of components out there making it complicated to make everyone happy. I dig that RL8 seems to have flexible set.

This is what I meant when I wished there were more decent options out there.

Porsche engines make excellent jigs. If I had the means, the double walled hydro formed designs would be nice. I know MODE uses Siemens NX to design systems.

[MarkRobinson]

in 1998, my 965 stock dynoed 247/267rw on a Dynojet 248e
1999: B&B headers/exhaust: 267/287 with drastic lag reduction
305/315 1.1 bar boost, stock turbo
60-1 turbo: 365/365 @ 1.0 bar boost
60-1 turbo 387/425 @ 1.2 bar boost

Mark.

Originally Posted by JBL930

400WHP with stock head studs is pushing it as it is don't you think?

Does anyone know what the stock 3.3 964 WHP figures are? I'm guessing about 260, maybe 270? With your headers and muffler (and a different air box) there's a gain of 80-90WHP, that's a massive amount of power for basically very little! How much better are the SC cams compared to the stock 964 turbo cams, what amount of that power can be attributed to the different cams?

[BoxsterGT]

Sorry to but-in, but theres a VAST difference between 965 turbo cams and 911SC & 964 normally aspirated cams.

I would expect 75-100hp increase at peak output using the N/A cams over the original turbo cams.

Len

[JBL930]

Originally Posted by MarkRobinson

in 1998, my 965 stock dynoed 247/267rw on a Dynojet 248e
1999: B&B headers/exhaust: 267/287 with drastic lag reduction
305/315 1.1 bar boost, stock turbo
60-1 turbo: 365/365 @ 1.0 bar boost
60-1 turbo 387/425 @ 1.2 bar boost

Mark.

So the B&B's gave you an extra 20bhp with an otherwise stock set up! Either the B&B's are only slightly better than stock, or we're seeing some silly figures put forward for others.
Personally i believe your numbers...
I really like the equal length headers, i don't doubt they are better etc (i've said it many times that i'm a fan)... But it's important to keep things factual. 90+bhp with nothing but a change of headers is BS... Anyone who believes otherwise is a simpleton

[MarkRobinson]

Yes, totally stock car at the time of those dyno's. I have the charts too that I can get from Colvin Automotive as well.

I expected 30-35 so I was a bit disappointed in the actual results, however, I did three roll-on's with a 410rwhp Vortech Mustang Cobra: pulled him all 3 times 4-5 car lengths from multiple speeds: didn't make sense. The B&B with cat-delete did make a HUGE reduction in lag: so that was nice.

[DDDD]

Originally Posted by JBL930

So the B&B's gave you an extra 20bhp with an otherwise stock set up! Either the B&B's are only slightly better than stock, or we're seeing some silly figures put forward for others.
Personally i believe your numbers...
I really like the equal length headers, i don't doubt they are better etc (i've said it many times that i'm a fan)... But it's important to keep things factual. 90+bhp with nothing but a change of headers is BS... Anyone who believes otherwise is a simpleton

Who claimed 90+ hp? That would be hard to imagine with any header.

[RarlyL8]

Yes 90HP must be a typo of some sort. Headers are facilitators and work better when everything down stream is opened up as well. Just strap a set on a stock engine and they will be choked by the other stock components. If doing mods in stages I always recommend replacing the stock muffler first and working your way back. You can see the best results from each component that way.


Not to change the subject, but looky what I have on the bench ...

[cover]

They look NICE

Are those finished production exchangers ??

I´m really looking forward to install headers / exchangers and muffler on my 76 930.

Best regards
Christian Oversoe

[tj930]

Great stuff, Brian

[RarlyL8]

Yes these are heater box components. It is now my task to assemble and modify each one for a proper fit.
There is a long list of folks who have been waiting patiently as this project has taken a ridiculous amount of time just to get to this point. All must be modified so cranking these out will be a slow process but I will keep at it until all are complete and shipped. The next batch will include any revisions that I make to these. Cost will exceed sell price this go round which I am good with due to the delay.

[RarlyL8]

I have begun the process of modifying and fitting each set of heat exchangers before they go out the door. This first set of production units will go on my car for testing (it's only 97F today so may have to wait 'till it's dark, ha!). In the mean time I'll keep cranking them out. The next batch will be revised to include these modifications.