Im looking for a set of headers for a LS6 autocross car.
The most important thing I am looking for is Torque! I am
very interested in the Tri-Y designs from Bassani and QTP.
Has anyone tried these? Comments? How would this design
compare to the LG's? ( Remember, I only care about mid-range
Torque.

Thanks!

 

I started my mods with the bassani headers and there full exhaust set up from www.vincihighperformance.com . This was a huge change in torq, after the install the car pulled like never before. This change gave my car the low end that I was looking for and it also bumped the big end power up.

 

I have been studying these for a few months now. Much of the data, and the other systems for other cars I found on the internet, all indicate that the low end really gets a boost from this type of design. The QTPs are stainless and connect directly to the Random Technology X pipe and Cat system so the installation is very clean and you don't need a new cat back. I think on the Bassani's the muffler is actually moved to the center of the car, may be wrong on this. Most of the headers for the C5, with the exception of the LG's and the Dynatech, are mid-length headers. If you look at the installed photo's of the QTP's, you will find the final blend of 2 to 1 is several inches farther down the system than most of the 4 to 1 systems out there. I think this should help with the low end torque as well over a straight 4 to 1 system (LG and Dynatech not withstanding). Unfortunately, there is not a lot of data available on these systems, but what has been available has been very very good.

 

Did you use the single muffler/x-pipe kit? If so, how does it
sound? Are the Bassani Tri-Y headers coated mild steel? Thanks.

Russ

 

Yes.

 

I am looking for the exact same thing. I am leaning towards the QTP set up, and getting them coated. I only know a few on the forum running these. I would like some more feedback before I jump in. From what I have heard there were no code issues….yet. The other night there was show called “Rides” and they built a Chevy with an LS-1 in it. Anyway there was a shot of the headers as they were installing them and it looked like they were Tri-Y design…..for what its worth.

 

I also have the Bassani setup with their hi-flow cats. These headers are a good choice for a stock cam/street car where you use more low-mid torque. No codes especially cat efficiency, uses all 4 O2. Only +2 LTRIMS out of the box, only minor tuning adjustments needed. Much stronger low to mid and top range not bad. The 14 gauge coated tubes run cool. Easy fit, no jacking engine, removing starter, etc.

 

The muffler is no longer used, just a pair of cats going into an x-pipe.

 

See the Bassani article, scroll down a few pages. http://www.vincihighperformance.com/...0ARTICLES.HTML. The Bassani tubes are joined higher up than QTP and the O2s are now on the collector pieces. Bassani has resubmitted to get a CARB number.

 

Hi Guys,

There are no headers made for the C5 or C6 that produce more torque than the LG Pro Long Tube headers.

Our headers are exactly what we and 5 of the fastest Corvette World Challenge teams use on their race cars. Some of these teams spend over $400k to race in the World Challenge series, and none of them would leave any power or Torque on the table.

We designed our headers with "Merge" collectors which also broaden the total power curve. None of the other brands have merge collectors. The merge collectors increase scavenge and increase torque. This combined with our 32" primary length give the highest torque numbers of any header on the market while stll producing great top end power.

Our headers are full 304 stainless and include a 3" X pipe plus 3" rear pipes for a complete bolt on system. It is a complete system that doesnot require the buyer to mix and match from other manufacturers nor does our system require any cutting of the existing system.

And the dynatechs have not made the power even though they tried to copy our system. They compromised on the cats, and x pipe which hinder their performance greatly.

Plus with our headers on sale right now, their is no obsticle in the way of buying our headers.

... Inappropriate comment deleted -- savewave ...

Our headers produce the most power "under the curve" than any other header available for the Corvette. Thanks

Lou Gigliotti LGM

If you do a search you will find that our headers do exactly what we say they will.

Thanks again LG

 

here is a graph of what our headers did recently on a new C6. the curve is similar to what happens to a C5.
I will add a C5 graph asap also.

 

Here is dyno recent from Rev Extreme over TPIS headers. We gained 35-38 lbs of tq @4000 over the TPIS header. So i think we are up there in the torque number.


... Inappropriate comment deleted -- savewave ...

We designed these header for an across the board gain. Not just up top. We could have use merge collectors like in our Camaros headers, but we decided to design them from scratch with the Tri Y style. We worked with GM Engineers that built the Z06 and they helped us out with what works best.

Our system is a complete stainless steel system from front to back and bolts to the factory axle back. Our system retains all 4 factory O2 sensors so no simulators are needed. No codes and easy install. Our systems are on sale right now and have many options to chose from.
Cats, Off road and dual cutout style and make year specifc headers. Not one size fits all.

If anyone has any questions feel free to call us.

 

Confidence is not arogance, and fact is not hype.

It was a little disingenous of You since you failed to mention that your graph is from a 408 cu in with a Fast intake and a 90mm TB. and open cut outs.

If you go to this link: http://forums.corvetteforum.com/showthread.php?t=929941

You will see what a stock Z06 with just AFR heads, G5X-3 Cam and our LG Pro Long Tube headers makes with a stock intake and stock ported TB and stock mufflers.
Now that graph says something. Any car can make torque with a big block. ( by the way, those are pretty low torque numbers for a big block.)

Here is the stock cu in LG header graph from the link above.


I will make the offer to you just as I did with other brands.
Lets agree on a shop that can install both header systems, and let them speak for themselves. In fact, you can just contact that forum member with the 467rwhp 431rwtq and ask him to install your headers.

Thanks

Lou Gigliotti LGM

 

Well, I dont have a graph, but I will try to find one. We have had the best luck with the Kooks headers. They are making excellent power. Call me at the shop, 281-870-8787. PM sent.

 

This article is a good read for the original question posted in this thread.

Tri-Y Header Design Article

 

LGM, QTP, Kooks/MTI....

You guys should all consider submitting a set of your headers to LAPD for a 3rd party shootout. Let the numbers do the talking!
http://forums.corvetteforum.com/showthread.php?t=926569

 

Read the following articles and look for the "Headers by Ed" web site and his discussion on Tri-Y headers.

Article 1: http://www.racingbeat.com/4_1%20Head...headertest.htm

Article 2: http://www.racingbeat.com/2001header/headertest.htm

My conclusion is that a properly tested and designed 4 into 1 header can outperform a Tri-Y throughout the torque curve. Please read the articles and decide for yourself, though.

Incidentally, Burns Stainless speaks of how important the collector is to the performance of a 4:1 header and I believe the biggest difference between the LG's and the Dynatechs are the collectors and how the primaries are treated at the collector entry point. But for @ $800 Burns will sell you a pair for your Dynatechs and then you might match the LG's....but you'd spend more money

I still think the primaries on all the production headers are too large for slightly modded LS1's and aren't long enough to maximize low end torque. They should be closer to equal length, also, and the x-pipe on the off-road models should meet immediately behind the collectors for optimum performance. No one wants to build those headers, though......bigger is always better, so they say, even after all these years of research and evidence to the opposite. my 2 pennies

 

Anybody can claim that they have the "best" set of headers. Maybe, just maybe, there is no "best of the best." Maybe they are all good, with each manufactuer's headers having attributes that make their's better in one area or another then the next.
In making a choice, it seems to me to come down to experiance others have had with a particular brand.
My Vette had the first set of QTP headers not installed in a mule. Outside of a Black Wing air intake it was completely stock. Barry has the dyno numbers taken with just a couple of miles put on after install and the cars computer in no way adjusted to the changes. Those numbers (32+ hp, 30+ lb. foot torque) are impressive on a car that was not yet tuned.
The performance shop (J&M Motorsports) where they were installed said they were the easiest installation they had done up to that point.
Also, NO CODES.
Anyone who decides to purchase QTP headers will not be sorry.

 

LAPD already did a test between our LG pro Long Tube headers against brand K.
The results are available if you do a search, and the LG Pro Long Tube headers made 10 more hp and 23 more torque at the low end.

We have done more back to back tests than any header on the market, and our LG Headers consistently make the most power under the curve. And most of the stock cu in cam and head cars make the best hp with our headers.

The highest hp cam and head cars, (J-rod 503rwhp for example) have our headers on.

I have been racing and winning for 33 years, and we built our headers with max power under the curve in mind. Knowing that we could not give up top end power, we would not compromise.

I will be glad to go through the "testing cycle" again but when we out powered the other leading brand the last time, a "Header war" resulted.

Thanks

Lou G

 

I hear what you're saying, Lou. Obviously the goal is to end the header war, and just have full disclosure on what the options are.

The test you refer to was done well (by LAPD), but it was also on a max effort (475ish rwhp car) vs what is proposed to compare more traditional I/E cars, te Kooks system was also the smaller midsection one according to what came out after the test.

Glad to see you'll pony up if need be. I wonder if the others will.