Are the Dynatechs available in a 1 7/8 ? I just ordered a set of Kooks cus I didn't think the Dyna's were available in that size primary. Was I wrong??

-Dave

 

Yes, I have before and after dyno results for the dynatechs, which I will share. BTW, the headers are not 50 state legal: all long tube headers are illegal in california among a few other states.

First off, I have a 2000 A4, hence the results will be lower than those with a manual or an A4 that is 2001-2004.

The first dyno was done in december 2004. Only mods were a blackwing air intake, magnaflow catback, and a magnaflow x-pipe. Final numbers were 316.6rwhp and 317rwtq, fully tuned with an AFR of 13.0



The next dyno was done in march 2005 with only the addition of dynatech system with cats. Fully tuned with an AFR of 12.8, the final numbers were 325.2 rwhp and 334 rwtq. All testing was done on the same chassis dyno.



At the time, I was pretty disappointed with the small change in peak numbers of 9 rwhp and 17 rwtq. I was expecting the 30-40rwhp that many here are always raving about. However, if you really look at the graph, the headers are picking up 15-20 hp at rpm levels under the curve, which is really where I need it more. I am rarely up in the 5500rpm level with my A4, so peak numbers werent a huge deal. From the headers alone I think you can conservatively expect 20-25 rwhp and similar torque from the headers alone. More than anything, I enjoy the sound of the system. It really gives a mean and ferocious growl.

 

I think this is the route I am taking. I just purchases a 2000 MN6 and it already came with corsa indys, corsa x pipe, and the the K&N Intake. Would I Need the Dynatech X pipe or rear pipes to have the headers and cats work with my exhast system currently installed?

 

I picked up 2-3 MPH in the 1/4 mile with the Dynatechs. A very good bang for the buck mod IMO.

Mark

 

Yes they do, but they are only for high flow engines like the LS2, LS6 etc. The 1 7/8 defines the diameter of the tubes from the head to the collector. The LS1 needs the 1 3/4.

 

 

You can elect to leave the Corsa X pipe or replace it with the unit that comes with 115-736300S (98-'00 CORVETTE C-5 HEADER SYSTEM). If you just buy the 115-736300 (98-'00 CORVETTE C-5 HEADERS) then you will have to buy the CATS separate ($170) as well as the pipes that connect the CATS to the X-Pipe.

Believe its cheaper to buy the Header System, remove the CORSA X-pipe and sell it on the Forum or E-Bay.

Hope this helps

 

So b/c I will have a Z06 (01') I will need the 1 7/8 LT's? I also plan on adding a cam if that has any bearing. Dynatech sells them in this size?

 

If you are starting from an LS6, and intend on adding a Intake and Performance Cam, I believe you should install the 1 7/8. I suggest calling Dynatech just to confirm, or ask the experts on this forum ( ) for a second opinion. Good Luck

 

The 1 7/8 diameter primaries are intended for high displacement applications.

 

Well I do plan on adding Halltech and a cam, but its not high displacement, so not sure which I should do. I guess I will try and contact Dynatech. Still debating going with LG's though.... the question would remain with them as well.

 

Like 383 and up .....

 

Ok, so than for just a cam & headers on stock displacement I should get the normal size ones correct?

 

Scoggin Dickey have a group purchase going on,great price includes freight. Call Marty Morris @ 800 456 0211 X357 or email @mmorris@sdpc2000.com. If your in the market you will be glad you did.

 

when I still had my 2002 Z06....I personally installed the Dynatech Supermaxx Headers dynoes, and then installed the Kooks 1 7/8s headers. Numbers were within 2 hp and 2 lb ft with each system which is due as much to atmospheric condiations as anything else. They Dynatech kit is a much more complete set up than the kooks....and is 10 times easier to install if youre doing it yourself. Just my .02

 

Maybe the difference was small though b/c those 1 7/8 headers were actually too big. I am assuming the Dynatech's were the regular size ones.

I emailed Lou at LG today and he said the 1 7/8 headers are only for larger displacement motors and you can actually lose Tq (he might of said power too). But he might have just meant low-end though.

What were the actual gains of each? And was the Z otherwise stock?

 

the car had MTIs X1 cam....besides that and an intake, it was pretty much stock. I wish I still had the graphs...Id post em with the two different set ups, but I gave em to the new owner when I sold the car. From my understanding....unless youve got an increased displacement engine, or are using high level of boost....youre just as well off with 1 3/4 v. 1 7/8. I was planning heads and cam....hence the original decision to go with the Supermaxx set up. I was very impressed with the quality of Dynatechs product....complete from nuts, bolts, new gaskets, right down to O2 extensions and zip ties. All in one package delivered same day. Went in with little effort on jack stands in the garage. The Kooks on the other hand, showed up in 3 different boxes, over the course of a week and came with nothing more than the headers, cats, xpipe, and the bolts. I actually ended up reusing all the extra stuff from the Supermaxx kit. Beacuse of the design of the kooks, they are also A LOT harder to get in. It took 3 of us, using a 4 post lift a solid afternoon to get them in. Im not trying to bash the Kooks...theyre obviously proven headers. But in my opinion, when I get another Z, I will certainly buy the Supermaxx kit again. Between the cost, performance, and ease of installation they're by far the better deal, unless you plan on going with a big cube motor where the 1 3/4 might choke the motor. Again, just my opinions based on my experience, other may feel differently. Good luck...you really cant go wrong either way!!

 

sorry....stock....the car dynoed 368 rwhp....with the cam and the supermaxx, it made 408 rwhp and made 410 rwhp with the Kooks....dont remember the exact TQ numbers but the Kooks were 2 or 3 ft lbs less than the Supermaxx, which makes sense, given the bigger diameter tubes. Keep in mind, both set ups were dynoed on the same dyno in Houston, in July....so the number may be down just a bit from what others have seen.

 

I'm surprised that's all it dyno'd since it dyno'd so high stock. It only gained 40rwhp with LT's and a cam. Is it a small cam?

Both were through cats right?

 

both were through cats yes....and I too thought it would have dynoed a little higher. One of the reasons I wish I still had the graphs was so you could see, even though I didnt pick up a huge amount in peak numbers...the area under the curve was enormous....it was an average of something like 28-32 rwhp under the curve from 2000 RPMs on....so even though on paper, the number dont sound that big....the damn thing ran like a bat outta hell. Also, it was 110 degrees out the afternoon that it was being tuned which ment that Jason at MTI couldnt get the most out of the tune. They told me to bing it back once the weather got cooler and they could probably get a few more horses out of it....but I unfortunately had to sell the car before I had a chance to bring it back....either way.....if youre looking for a good cam and a quality install, I highly reccomend MTIs X1 cam