Search results

Yes, there were cats bolted to the manifolds before the Y pipe. Read through the thread on exhaust sizing and the one on Merging and Scavenging for more info. http://www.lextreme.com/forums/showthread.php?t=14360&page=4

It is more than just SIZE. A single 2.00" pipe without restriction can easily support 200hp. So, dual 2.00" pipes can easily support 400hp. It is when the pipes have transitions that things start getting fuzzy. In the stock Y pipe the area the single center pipe is only 74% of the area...

Excellent. Readers take note, this is the CORRECT way to build a high efficiency collector. On the intake, very interesting. It appears as you have more or less duplicated the factory runner length to preserve low end torque and response while removing the restictive lower intake...

WOW... youtube video between a Veyron and a modified Nissan GTR "Switzer". In russian and no stats on either car but this video did more than surprise me. WOW. I don't know. Maybe this is faked? http://www.youtube.com/watch?v=jLtG_1QPsqU&NR=1

Jailbar, well done, your design should work nicely. I applaud your effort to duplicate the factory "double D" design for your Y pipe collector. If you are so inclined you could fabricate inserts for your header collectors. Take sections of 2" pipe the length of your current collectors...

If you are running straight through Magnaflows I doubt there is any power gain available with the cutout valve unless you engineer the system to TUNE to the length to the cut out. The extra pipe that you eliminate from the flow path is not a problem and can actually be a benefit as it directs...

On my way to play golf on Friday I drove up behind a black GTR. Traffic was heavy but the middle aged driver still gave it a quick blast... very exotic sounding. There was also an older modded Subaru WRX that may have had something to do with the blast. From the first time I saw a GTR in...

jailbar, while your idea to reduce the collector volume is in the right direction I think the variables as well as the hassle to create a good flowing insert and weld it in place... with unknown results... leaves the probably better solution to cutting the stock collector off the headers and...

Steve, Attached are three quick drawings suggesting what I would TRY to achieve your goals. Depending on what mufflers you choose after the split the backpressure they create could be very small or somewhat high. If the backpressure is small there is little if any power gains by using...

Beezer, great post on a subject that most will not consider.

Steve, you seem to be grasping the physics fairly quickly. The valves can be used to bypass restrictive mufflers therefore creating power by reducing backpressure or they can be used as you are intending bypassing unrestrictive mufflers to increase sound. If you want maximum power when in...

Bushwhacker, I have seen the planetsoarer posting before, it is a Y pipe design, it was guesswork and the results will not be the same for other engines and configurations as total dimensions are important. There is a lot of math involved along with R and D in developing effective systems...

Welcome to Lextreme! What is your goal? Stock powered runner.... or "power enhanced"? Automatic or manual transmission?

The first Magnaflow part you list, 2.0" inlets, 2.5" outlet, PART # 10735, will work just fine in both postions, front and back. However for the front Y the narrower the merge is the better so if you can find someone to build one like I posted you will get a slight improvement...

Thank you for your respectful response. I almost always try to do the same. Hey, we are all and always learning right? I have posted quite a lot here and on Club Lexus so some seaching under my name will turn a fair amount if anyone is interested.

The GS400 and LS400 VVTi engines are identical as is the drivetrain. The manifolds are the same design but the LS are slighly longer. The LS exhaust is more restrictive with the stock Y pipe necking down from 60mm center pipe to 55mm center resonator and then baffled mufflers mid car vs the GS...

Actually his highest numbers were 281rwhp and 306rwtq Here is his thread http://www.clublexus.com/forums/performance/501992-5-15-10-dyno-results.html Headers were largely my design made by S&S headers who is no longer in business. They were tri-Y shorties that mounted the catalyst in the...

The VVTi heads flow similar to some of the ported earlier heads and the intake manifold is way better. No one has ran them on an early block yet as it would require an oil feed to the VVTi mechanism and this is done through the deck on stock engines. The VVTi also has higher compression and...

PLEASE do not take what I am about to say as an insult because I have great respect for individuals such as yourself that are building these or any engines to higher output. Your exhaust recommendation above is way better than most but I respond to give further insight for readers here...

Welcome boXXer! Read through and search through this website for the most xUZ-FE information you will likely find. Turbosystems are engine/chassis specific so your swap is unlikely to work with anyones existing system. Even though the factory rated the 1990-1994 engines at 250hp/260tq...