Friday we dyno tested Bill Coon's Gen 4 and Matt Blehms Gen 3 Maximas. We dynoed the cars at Ed Wright Automotive in Tulsa, Oklahoma. The shop has a 2 year old Dyno Jet Dyno and a technician who has performed hundreds of dyno tests both for customers and for their own dyno tests they perform in conjunction with the performance chip reprogramming they do. The technician said that if any of our earlier dyno tests were with a Dyno Jet with the DOS version of software we could expect to see a 10-15% drop in horsepower. He said the older machines required guesswork on the part of the technician where now it was all done by sensors. Since we had used a new Mustang Dyno on our VE tests we did not have to worry about that.

We did Matt's car first, an automatic. Matt has one of our aluminized Y pipes, we actually installed another pipe on his car to gain additional clearance, he has an aftermarket sway bar which is much thicker than stock. He now has aprox 1-1/2"+ clearance between the top of swaybar and bottom of the Y pipe. Before it was about 1/2" -5/8". He had added new motor mounts but still felt a slight bump when he stomped on it. Matt's car tested out at 134.8HP with 186.4# of torque.

We tested Bill's car next, he has had our aluminized Y pipe on his gen 4 car for a week or so. He has a manual trans and was tested in 4th gear, it tested out at 176.1 HP with 189.9 # of torque.

I am waiting to receive the before dyno sheet from the Intercrew dyno before we post the pages on the site.

I asked both Matt and Bill how they liked the pipes, Bill said to look at his left front tire and then look at the right. The right tire was bald and had threads showing, in fact the technician looked at the tire and asked us if we felt it was safe to test because of it. Anyway Bill has a tire on order. Bill also said our pipe fit better and was easier to install than the stock pipe. Most of you have read Matt's posts in the past and I know he will post in addition to mine.

Our pipes seems to enhance the manual trans or auto trans cars a little different with different power curves. I get a little nervous when I hear things like how the pickup is real good between 60 and 90mph and there is still power to go when running 120mph.

I think it would be foolish of Dan and I to tell you we guarantee a certain number of horsepower if you install our pipes. In fact I don't think anyone can because a lot depends on the condition and mileage of your car. We can however guarantee you will feel the difference and you should realize we think a real 8-12 hp. I saw a post where one of the gen 3 cars got 12-15 hp with headers so that is probably about right.


We have now dyno tested our Y pipes on a VG, a VE and a VQ motor. We know that in order to get accurate results one must wait at least a few hundred miles between dyno tests to allow the computer to reprogram itself to the mod between tests.

We plan to dyno Matt's car with our high flow cat and our 2.5" B pipe and muffler in a couple of weeks and will post the results of it as well.

We will have a 3" version of our Y pipe available for test this or next week for the supercharged version of the Gen 4 Maxima.

So in essence we feel the addition of a Y pipe is probably the best bang for your buck mod. If you want a pipe which will both perform, flex, is resistant to cracking and is affordable buy ours. If you want a pipe which is polished for show do not buy ours, we do not use 304 stainless because it is too brittle and and has a tendency to crack.

Dallas and Dan Warpspeedperformance

 

I was hoping to see your 4th Gen gains compared to the Cattman Y-pipe (or "The Other Y-pipe"), like you showed with your 3rd Gen pipe. Is this possible?

You said," Our pipes seems to enhance the manual trans or auto trans cars a little different with different power curves."

Could you elaborate on that? Does this mean autos don't benefit as much as 5spds, or what where you trying to say?

This was also said "I get a little nervous when I hear things like how the pickup is real good between 60 and 90mph and there is still power to go when running 120mph."

What was this statement gathered from the auto or the 5spd?

Thank you for your time and replies, however if you convince me your pipe is just as good, if not better than Stillen and Cattman, then I will be your best advertiser on this forum. Just ask Cheston and UPRD (Thank goodness that group deal is about over, I can't wait) Email me if needed ~~Clint

 

We do not have a Stillen or Cattman pipe to dyno for the 4th gen Maxima. The only pipe I have actually held in my hands is the gen 3 jet coated Cattman pipe Dan had on his VE Maxima. We credit that pipe for giving us both the incentive to make a better pipe, the price gave us the incentive to keep it affordable.

My personal opinion is that we are happy to at least match the results of the other 2 Y pipes.

If someone wants to do an independant dyno comparison of the three different pipes we would probably furnish one for the test. We have never said ours is better than the other three but having seen a few pictures and seen the prices we feel ours is a better value. We feel that the same car with either of the three pipes should be relatively close with either of the pipes. Just as the dyno shows there is a slightly different power curve for the auto and the manual trans it seems to vary depending upon what other mods your car might have, it also depends upon the condition of your drivetrain. Bill needs a new airfilter, when one does a dyno on a car it should be in top shape. The dyno still showed an improvement even with the bad filter.

We have designed ours for better flow and less restriction as well as more flex. We wanted to avoid the poor customer service of Stillen and the cracked pipes and cracked welds that both Stillen and Cattman have had problems with. That is why we went with aluminized steel and 409 series stainless steel, both are easy to work with and mandrel bend easily. The have better flex properties than the 304 stainless. The aluminized steel and the 409 stainless steel are typically used in the automotive world for exhaust. The 304 has better resistance to chemicals and is polishes real pretty, it looks great on a street rod exhaust, it is also used a lot in the dairy industry and makes a great tank for holding fluids. According to the several engineers we consulted with it is not the best material for a front wheel drive car with a flex section in the exhaust. The 304 splits easily, we split my 304 stainless tail pipe tip on my Jeep by trying to expand it to slip over a 3" pipe, you can't even clamp it unless it has slits in it.

We get a little nervous when we read about someone on a highway that we might meet on the same highway driving at 120 while trying out a pipe.

So we will continue to offer bargain prices for a Y pipe which we feel and others are saying is real hard on right front tires and kicks *** and has no ricey sound.

Dallas Dan Warpspeedperformance

 

Does your pipe have the "can of bees" sound from the flex section?