I see you have pics of the intercooled slr intakes what are the chances we can talk the guy who is doing the exhaust into mass producing a couple of those for less then $16,000.

 

I'm sure they would be able to accomplish that. Gut the factory intercooler, use the bottom half's of the intake manifolds (surge tanks) and fabricate the rest out of sheet aluminum. The prototype would probably be pricey but it sure would be sweet and much more efficient.

 

Hey guys, well the headers are all welded up and installed. They will be sent out for coating then dynoed. Check out the pics...

 

maybe with these bad boys and the rest of stage 2 we can get over 440+ base... that would be nice... can't wait to see the dynos...

 

What were the power gains from the headers?

 

They haven't dynoed them yet as the donor's car is still waiting to receive the limited slip rear-end from the manufacture. I'd guess there're still out a couple weeks for the dyno. The bummer deal with the dyno though is that they are building a new exhaust system to go along with it. Not exactly a good comparison for us who have the OEM exhaust.

Well I just read some interesting info on the Benzworld forum. It turns out the OEM manifolds are shrouding the exhaust ports!!! There is a very good chance that we will see some good numbers. Keep your fingers crossed!

 

What are they thinking the price of these are going to be and can you buy them unpowdercoated.

 

There is a group buy pending on the Benzworld forum. There is a $500 deposit and an additional $400 once they are complete (I assume) total price $900 with the coating. There haven't been any price quotes for uncoated headers but being made out of mild steel a coating is necessary otherwise they will rust very quickly and your investment will quickly deteriorate. Also these are Jet Hot coated which is a thermal barrier coating not to be confused with decorative powder coating.

 

I can't believe these would improve performance much. A true header has a collector where the pipes all meet. The collector creates an extraction effect by each pulses helping to pull the next pulse out. The best header is long tube equal length into collector under the car. The next best and most used now days because of the Cats and confined space is the equal length shorty followed by the unequal length shorty. For this kind of cash you should be able to get REAL HEADERS. I know people that will build you a real header for this kind of money.

 

why bother with a dyno just clip on a G-tec pro meter, it's more accurate and we can have the numbers faster!

also why do you need to coat stainless steel manifolds?

 

That's arguable. Put it this way, what would see more, a header with dyno proven results or a header with Gtech proven results? You don't see race teams out there tuning their cars with a Gtech. Gtechs are cool don't get me wrong, but they have limitations.

Where did you read that they are stainless? They are in fact mild steel.

 

I thought they where stainless, I must of mis-read that somewhere, maybe it was from the thread on Burns stainless, bla bla bla...

Race teams like the dyno for many reasons, and not because it's more accurate, the G-tec is far superior in accuracy, because it takes into account real world driving. For instance the dyno doesn't calculate air drag which is a huge factor, then there is another set of friction causing tires up front that never get factored in, and then there is air moving through the engine compartment which aids in cooling.
http://www.gtechpro.com/accuracy.html
But with the G-tec you need a nice smooth road maybe half a block probably could get by with less. usually we have markers on the road for entering for acceleration and deceleration. G-tec is far superior to the wheel dyno in terms of getting an accurate HP/Tq curve. Check out the G-tec website the 1/4 mile drag test comparo is near identical. +/- .01 sec and +/-1% Hp.

Now the engine dyno is where its at when building engines and tuning engine maps, bar none!
Now if you a professional race team you really don't want to be out in the open doing speed runs up and down the street.

http://www.thewinchesterclub.co.uk/g_tec.htm

 

REALLY BAD DESIGN ! All 3 ports should meet into a collector, not merged middle pipe... Hell, the Super Sprint headers are better than that...

 

Absolutely right! That is what I said a few post's up. This design has no scavenge effect! What is the point of this design? This is not a header, it is just a weird exhaust manifold.

 

guys this is a basic shorty header ... some gain will be seen due to the larger primaries but yes nowhere near the sweet gains of a long tube with a properly tuned length for a proper scavenging effect for the NA guys ... for the supercharged folk ? this is great as it will give them the breathing room to lower EGT temps and raise boost safely along with natural gains from less restriction.

unfortunately that engine bay is TIGHT and long tubes would cost a bundle.

added: i think the biggest gain will be seen from the coating keeping the engine bay good amount cooler ... i would rather see long tubes with white lightning coating for a tad more ... now that i would buy.

 

HDDP posted a picture of a proper shorty header. I hope these strange looking headers work. Maybe they have discovered a new technology. But people considering these should be aware of generally accepted header design.

 

either way those shorty headers look a little less restrictive than the stockers, on top of that bolt in some straight pipes and merge into a collector downstream. should sound nice with the Ansa muffler.

 

Too bad they don't fit...

What do the headers you had built by Ron look like?

 

What headers did you get?

 

Here is another to consider: