William Knight's headers

[Tom_in_NH]

Just received these from William a week ago. They're very well done. These are the 1-3/4" units. Beautifully polished, nice welds, v-bands, and best of all, a smokin' deal!

[WPOZZZ]

Gorgeous!

[winders]

I have them on my race engine. I cut off the installed v-band mount and used Vibrant v-bands instead. The headers work quite well and seem to be quite durable. They get a thumbs up from me!

I like the S-Car-Go headers more as they use a better stainless steel and the collector is better. But they are not worth the price difference as the S-Car-Go headers don't really make any more power.

[Tom_in_NH]

Good to know regarding the Vibrant v-bands Scott. Yup, I looked (briefly) at the S-Car-go's as well. Too pricey for my strictly street application.

[911 SLANT]

I went the M&K headers from Brian

[Mahler9th]

I have had a set for about 5 years. They are made overseas. I have been very pleased with them. I showed them to a few friends... Mat Lowrance, Jerry Woods and Pete Weber. They all liked them.

Mine have not had a lot of run time in the past few years, but they have held up really well and i can recommend them, and William was great to work with.

My application: track driving and racing.

I had a set of Mark Roble's S Car Go headers for a while--- they were fantastic. They are hand built in Marin County. They are a lot more expensive. But high resale value!

I have also run a couple different sets of George's European Headers... now sold buy GT Racing. Very pleased with their performance and durability... but of course they are not stainless.

[Geneman]

ME TOO. the ones i got from knightrace i thought were georges knockoffs. fantastic units and dyno proven.

question: what is that red canister in the image below. is that an inline oil filter ?

if so,, does it replace the usual oil filter on top of oil tank? never seen this part .

thank you.

[Racerbvd]

We ow!!!⁹

[911 SLANT]

Originally Posted by Geneman

ME TOO. the ones i got from knightrace i thought were georges knockoffs. fantastic units and dyno proven.

question: what is that red canister in the image below. is that an inline oil filter ?

if so,, does it replace the usual oil filter on top of oil tank? never seen this part .

thank you.

Yes, Its a Peterson 400 series oil filter. Has a 100 micron screen cartridge inside. I still run the stock filter. Just some added protection.

[Henry Schmidt]

Originally Posted by Tom_in_NH

Just received these from William a week ago. They're very well done. These are the 1-3/4" units. Beautifully polished, nice welds, v-bands, and best of all, a smokin' deal!

Chinese made QSC headers?
Some fitment issues but generally a decent product for the price.

[stownsen914]

Originally Posted by 911 SLANT

Yes, Its a Peterson 400 series oil filter. Has a 100 micron screen cartridge inside. I still run the stock filter. Just some added protection.

So you have a filter on the suction side of your oil pump? Isn't that a really bad idea?

[911 SLANT]

Originally Posted by stownsen914

So you have a filter on the suction side of your oil pump? Isn't that a really bad idea?

Thats a good question. The mechanic who built my original 2.7 RS spec. Motor put it on for extra safty he said. I have had my valves adjusted and corner balanced from a highly respected mechanic Tyson S. Last year and he didn't mention any concerns. I do have very a 4 rib pump though. I only have 51 miles now on my 2.8 build. Should I take it off?

[winders]

Originally Posted by stownsen914

So you have a filter on the suction side of your oil pump? Isn't that a really bad idea?

I would tend to agree. Even if you have the version with the bypass.

[winders]

Originally Posted by Henry Schmidt

Chinese made QSC headers?
Some fitment issues but generally a decent product for the price.

William has a custom version made for him that is higher quality (TIG welded versus MIG and better quality control) than the standard QSC product. I had no fitment issues and no build issues. I was skeptical until I got the headers in my hands. Like I said previously, not as nice as the superbly made SCarGo headers but no performance difference either.

[911 SLANT]

I do run a 3.2 Carrera oil tank and filter. I also have a front oil 9 row cooler with a MOTEC thermostat. Henry S. What do you think? I'm open to any suggestions. Do not want to have any problems with my new 2.8 motor.

[AG81]

I run Brian's headers.....



Very happy.

[Mahler9th]

Tyson is a fabulous technical resource, and a talented and accomplished driver.

I might ask around about an oil filter in that location.

Maybe okay, maybe sub-optimal. May not be a good idea. I have never seen such an implementation, and I have been swimming heavily in the 911 ocean for about three decades.

I showed my headers to Mr. Winders before he bought his. Just as he reports, I have had zero issues with fitment, et cetera.

I have seen many sets of SCARGO headers, and know the owner of that shop and the builder of the headers. Accomplished, experienced, expert and long term Porsche and racing enthusiasts. Great Porsche people, and great headers. They used to sell a version made overseas, but they had quality problems. That was long ago.

We are all very lucky to still have these folks as resources.

[group911@aol.co]

Seems like a great idea right up until it does its job and restricts the flow.

Originally Posted by stownsen914

So you have a filter on the suction side of your oil pump? Isn't that a really bad idea?

[911 SLANT]

Thanks guys for your professional input. I took your advise and just finished changing S hose back. Lucky for me parts place 3 miles away.

[KTL]

The coarse scavenge filter is good for break in protection and peace of mind. You can easily open it up and look if anything got past the tank filter. Because remember the oil that exits the engine goes to the thermostat, to front oil cooler (when hot enough) and then back to the tank. Upon going back to the tank the oil goes up thru the regular oil filter and then dumps to the bottom of the tank (across a coarse screen) and then goes into the suction hose to feed the engine/oil pump all over again. These types of filters are good protection against trash that falls into the tank via the filler neck

The shops that have an engine dyno with remote aluminum oil tank could tell us what kind of restriction occurs with vs without one of these filters. They usually have a “sight glass” on the side of the tank and that allows them to monitor the level in the tank while the engine is cranking out RPM. So if the sight glass shows a tank level significantly higher level with the filter than without, you know it’s holding back some oil. If it’s generally the same level, then it’s not a restriction

But the guys questioning the filter do make a good point. If something does happen to clog the filter, it’s going to starve the engine of oil since it has no bypass function. There are filters like an Oberg telltale filter that have a trigger which activates a switch (for a warning light, similar to the low oil pressure light in the oil & temperature gauge) when the filter is in bypass mode