ok, well getting very close to finishing the prototype. luckily everything is being done on a cnc mandrel bender so once the prototype is done, the bender can spit these out all day long, lol. it will be done this weekend. wanted to show all the benefits this system has and how it differs from others.
First we decided to start all the way up to the stock exhaust manifold exit, meaning this system will be able to work with any turbo kit that can use factory style cats. doing this also gave us the chance to smooth out some of the bends that would be required to use a stock style cat or test pipe. it also means someone doesn't need to mix and match exhaust components to get a complete 3" system. there will also be 2 EXTRA 02 sensor bungs welded in for those running a wideband gauge and the other for the dyno a/f read out. that alone will save you $70-100 to have this done later. now obviously since there is no provision for cats, this is a race only system
the crossover section being used is actually serving a few different very important purposes. here is why. you will never have 2 exhaust pulses at the same time. you will get one pulse on one side then one on the other side, and it goes back and forth. as each of these pulses passes through the crossover, it helps create a momentary vacuum in the opposite tube. the outcome is better scavenging and dropped back pressure. now at the point of the crossover, you are now giving the exhaust 2 different routes for which to exit, therefore doubling your exhaust size after that point, yet still keeping high velocity in the front pipe sections. now since you have given the exhaust 2 different exits, (and we already know that the exhaust pulses only happen one at a time) you now have 2 resonators and 2 mufflers to help dampen the sound instead of one each side on a non-crossover system. this is obviously a expensive part to produce, and some shops charging $400 alone for just that X section.
the resonators that are being used are polished stainless and are filled with a ceramic packing material to never blow out. the inside of the resonators actually grow to 3.5" through the center, these will not rob any power at all. these are about the largest resonator you could fit on the car in a 3" dual.
now the mufflers. i will give a link and you guys can read for yourselves. very impressive design that has alot of technology in them and not just a resonator called a muffler, lol. many race teams are using this muffler exclusively, and it just became the official mufflers of nascar. yes the same exact mufflers in this kit!!! being used in nascar!! the design actually creates more power than straight pipes with very good noise muffling.http://stores.channeladvisor.com/ver...b.aspx?tabid=3

i have spent 3 weeks searching for the best parts to use in this system, to create the best hp gains, quality, and the best combination of components to make it as quite as possible too. i will be doing a sound test next to a Z with the aps 3" dual and see the difference in db's from aps to SVRTech's. this has been designed as a no compromise system and have set the target price of $1500-$1600. so it is right in there with all the other 3" duals, but the benefits of this system should be apparent.

again these are a few spy shots. the full system will be done in the next few days and ready for purchase next week. will be working on a 2.5" system directly after this using all the same components and design.

 

oh btw- it will all be polished too for that price, lol.

 

the cross over pipe is useless after turbo no? the vanes of the turbo make the air charge more linear rather than pulsing.

 

if this were true, your exhaust would sound like one constant tone. the turbo has little effect in eliminating the pulse into a solid flow of air. the X pipe still has an effect on better scavenging not to mention the other benefits on a turbo motor. the crosspipe is designed to help flatten torque and hp curves and create more power due to the scavenging effect.

 

Clean looking set up so far! I'd imagine that the X pipe would create a bottleneck in the system, rendering the dual 3" pipes rather useless. Another thing, an X pipe increases scavenging efficiency by increasing backpressure, correct? Not trying to knock you at all, just critiquing the design.

 

no, the X pipes increase scavenging by helping create a low pressure and decreasing back pressure. the center of the X pipe i huge, there will be no bottleneck there at all. the inside of the X is knife edged also. burns makes these for about $400 a pop. you don't see this design very much at all because it is very expensive to make as no machine can make them. it is all hand made. i am working with guys that have been in the exhaust industry making some of the systems for dynomax and MANY other exhaust manufactures. they also do their own turbo kits (for cars other than the Z/G). i told them i wanted a no compromise top of the line system, between my knowledge and theirs this is the design we came up with.

 

all in all, this should be the quitest system available and create more power than open pipes!

 

Great work, Looks very promising. You have PM.

 

"Since V8’s fire unevenly, exhaust exits in pulses rather than a steady flow. While one pipe is filled with pressure the other pipe is relatively pressureless but the connecting of the two pipes in a siamese pattern allows pressure to be released to the other side. This action allows the exhaust to pass through the pipe quicker and this better ‘breathing’ increases horsepower."


"Nothing terribly exciting, some older video when the car had true duals, cam is 230 @ .050, .639 lift hyd roller. Same mufflers I have now, except I have an x-pipe. Much quieter now. Car was loudest, by far (with an interesting exhaust note) with the UDHR4 (hyd roller, 233 @ .050, .621 lift) that went in first.
the car was exponetially louder with the true dual, now people who heard it before the x call it 'quiet', the 16hp (extra w/ x pipe) was just a bonus.."


"Have any of you messed around with crossover exhaust? With this system, the exhaust comes out dual from the exhaust manifolds, it then is connected to an X in the middle, and then going back out dual. I am fixin' to put on a new exhaust system on my Suburban. Through research, I have found that the crossover exhaust equalizes backpressure and exhaust flow increasing horsepower. Through testing, It was determined that crossover exhaust produced more power than straight pipe exhaust systems. I was wanting to know if any of you have messed with it? "

" question-I just put an x pipe under my race car in 3 inch pipe and out the rt side door. I have heard that it is a horse power and torque increase, I have been told that it is from 15 to 30 horse power. Has anybody seen any test numbers and are these realistic. It certainly has changed the sound and tone of the car. Thanks 71
REPLY-castheads.com has some dyno numbers. I recently built my exhaust with a y pipe. The motor gained 200rpms at the end of the straight. It also made the the car much quieter."



ok, here are some things i found on the net regarding X pipes. i could find no tech write-ups, so these are just copied from other forums. some are from racing forums or v-8 forums. again, you won't find this design very often just for the expence to make the part. i did find a z32 twin turbo tech install with an X pipe, but it was only on installing it and not the benfits of the X pipe.

 

My friend has a Mustang GT and they all swear by an X pipe designed exhaust, it is very popular in the V8 world. I myself am suprised no one has done this before, probaly cost of manufacturing, it would greatly reduce profits. Anyways I am anxious to see the final product, looks great so far!

 

it should also be more effiecent on our cars compared to the V-8's because of our firing order. bank1,bank2,bank1,bank2 and so on. the chevy V-8 firing order is 18436572. 8 and 4 plus 5 and 7 are on the same banks and firing in order.

 

Good point, are you going to offer regular tips and titanium "burned" tips? that would be a nice upgrade.... just an idea

 

still need to get the tip design figured out. will be doing that tomorrow. the 3" style mufflers need to be run with a separate tip as they are designed to be run earlier in the system than is allowable in the Z and not as the finishing piece in the exhaust. the 2.5" muffler though is a 4" out finish tip style.

 

In one of your other threads you mentioned packaging the exhaust with the Greddy wastegate relocation kit. How much of a discount will we be looking at buying those together?

 

not to be a dumb@ss or anything, but what exactly is the difference between one of this handmade x-pipes and something similar to this:



granted this piece is more than likely not stainless, the inside is most likely not knife-edged, and it would need some coaxing to match up the outlets to our cars/exhaust route. but this pipe shown above is $50- i would think one could modify or re-create the correct angles/bends and whatnot for not much more. just a question, again, not trying to bash or anything like that, i'm just curious as to the differences between x/crossover pipes.

 

Just more marketing hype... Add this to the other 5 3" exhausts that just sprung out with the same price range.

yay

My suggestion is to make this thing super different with a much more attractive price.

 

+1

Would like to see a better price.

Also if we dont want does mufflers can you just sell us the system and we get our own mufflers?

 

it should end up being about 1/2 price on the relocation kit if purchased together.

 

that piece would be very hard to modify to get to work on our cars with a 3" dual system. by the time you made the other 45 degree bends to run it parallel again, the pipe centerline would probably be to wide. it is not really easy finding someone who can mandrel bend 3" pipe either. at least it wasn't for me. you might have to use bend sections to try it and do alot of welding. not saying it isn't worth a shot, but it is really tight to get 3" duals under the car.
flow is optimized with the handmade design. if you look at the in and out angles, they are very smooth. you will only see the handmade ones on very high end systems or race teams.

 

when i started designing this there was only one other 3" exhaust available, lol. this system is different in nearly every single way possible from the others. plus it includes the test pipe area for the same price!! the build cost is much more on this system, so i am already cutting my prices to be competitive. not sure if you read my entire first post, but all the details are in there.