ARCHIVE 100 Series Cat-back Exhaust

[NKP Garage]

Am I reading this right?

Your test vehicle was dyno'd stock at 138.8HP (uncorrected) and 145.96HP. How on earth did a LC loose 81.2HP (uncorrected) and/or 74.5HP (corrected)? I also see a 24HP gain with your full exhaust, which is quite impressive without headers. If these trucks are loosing that much horsepower I may as well be prepared to start pushing it up hills around 2016. I am hoping I read it wrong, but numbers are numbers...

Keep in mind that these trucks make 228hp and 302ft/lbs at crankshaft from the factory. You are going through an automatic transmission, torque converter, center transfer case, driveshaft, rear differential, and larger than stock 33" tires (larger and heavier). The difference in the numbers you're seeing is basically due to all of these factors. The power measured on a dyno is where the tires hit the ground, not at the engine.

One of our shop cars making 500whp through an automatic made approximately 600whp after swapping to a 5speed manual transmission. That gives you a good idea of how much power is lost through just the automatic transmission alone.

 

[2000UZJ]

Keep in mind that these trucks make 228hp and 302ft/lbs at crankshaft from the factory. You are going through an automatic transmission, torque converter, center transfer case, driveshaft, rear differential, and larger than stock 33" tires (larger and heavier). The difference in the numbers you're seeing is basically due to all of these factors. The power measured on a dyno is where the tires hit the ground, not at the engine.

One of our shop cars making 500whp through an automatic made approximately 600whp after swapping to a 5speed manual transmission. That gives you a good idea of how much power is lost through just the automatic transmission alone.

Interesting, I didn't realize how much power we lost. That would certainly explain why a 2WD Tundra accelerates like a bat out of hell, and the 100 accelerates like a lumbering drunk guy trying to get up some stairs. I'm shocked the 100 (your test vehicle specifically) only put down 138.8HP. I know it's all about the torque numbers on these trucks, but I honestly did not expect to see such low numbers. She is still a quick truck, after 12 years and many many miles she can still get up and go if you tell it to.

 

[Anthony.L]

Am I reading this right?

Your test vehicle was dyno'd stock at 138.8HP (uncorrected) and 145.96HP. How on earth did a LC loose 81.2HP (uncorrected) and/or 74.5HP (corrected)? I also see a 24HP gain with your full exhaust, which is quite impressive without headers. If these trucks are loosing that much horsepower I may as well be prepared to start pushing it up hills around 2016. I am hoping I read it wrong, but numbers are numbers...

What were you expecting, a 400HP LS6 under the hood?

Fulltime 4WD vs 2WD alone robs a TON of power. Then factor in the auto tranny, huge tires, axle gearing, etc.....yeah it drops that number dramatically.

There is a reason why some people seek out and install front hub conversions for part time 2WD setting. More power, and better MPG...

 

[AimCOtaco]

Well I guess I know where I'm going for my new cats! This is great stuff!

 

[Brock]

Am I reading this right?

Your test vehicle was dyno'd stock at 138.8HP (uncorrected) and 145.96HP. How on earth did a LC loose 81.2HP (uncorrected) and/or 74.5HP (corrected)? I also see a 24HP gain with your full exhaust, which is quite impressive without headers. If these trucks are loosing that much horsepower I may as well be prepared to start pushing it up hills around 2016. I am hoping I read it wrong, but numbers are numbers...

nick I am guessing toyota measures at crank and the dyno is measuring at the wheels....we lose a lot of power once it is transferred through drivetrain.

 

[2000UZJ]

What were you expecting, a 400HP LS6 under the hood?

Fulltime 4WD vs 2WD alone robs a TON of power. Then factor in the auto tranny, huge tires, axle gearing, etc.....yeah it drops that number dramatically.

There is a reason why some people seek out and install front hub conversions for part time 2WD setting. More power, and better MPG...

LS6 would be nice . The part-time kit only improves MPG's by 1-2MPG. Not exactly worth all the work IMO. As for power, I would do it for the added drivability in the city, and the benefit of reduced front end wear/front lift on acceleration.

I may pull the trigger on the EMS after I see the DT dyno results. I would love to have a high flow exhaust system with headers and cats. Looks like EMS took the basics of an expensive exhaust system, and made it affordable/effective. Nicely done EMS!

 

[2000UZJ]

nick I am guessing toyota measures at crank and the dyno is measuring at the wheels....we lose a lot of power once it is transferred through drivetrain.

Yep. I forgot about the 400 things in between the motor and wheels. When a vehicle looses that much power, you really start to realize how much stuff is turning and transferring power. I think if Toyota published the HP/TQ at the wheels nobody would by it...who wants a 150HP overweight truck? Oh wait...we do

 

[Anthony.L]

I just want to want to order an entire system, from the heads all the way back to the exhaust tip! Come on EMS, HEADERS!!!!

 

[BBQ BOY]

I just want to want to order an entire system, from the heads all the way back to the exhaust tip! Come on EMS, HEADERS!!!!

Why couldn't you just use the DT headers and everything else EMS?

 

[Romer]

I am confused how these relate to the stock baseline graphs from here. I would expect them to be the same at stock, but I am far from an expert in this area

https://forum.ih8mud.com/100-series-cruisers/514381-dt-headers-dyno-result-thread.html

 

[ckkone]

Price for the entire system, s*** looks awesome and those a great power gains!

 

[NKP Garage]

I just want to want to order an entire system, from the heads all the way back to the exhaust tip! Come on EMS, HEADERS!!!!

We will be doing headers in the next few months as well, and I can promise you that they will be far superior to any other headers out there. You can always buy our exhaust system and enjoy the added power and then do the headers later on when we release them for sale

I am confused how these relate to the stock baseline graphs from here. I would expect them to be the same at stock, but I am far from an expert in this area

https://forum.ih8mud.com/100-series-cruisers/514381-dt-headers-dyno-result-thread.html

Those look like they were done on a "DynoMite" dynamometer. I've never used one of those personaly, but on that dyno, Mustang dynos, Dyno Dynamics dynos, Dynapack dynos, and most of the other ones out there it is very easy to "adjust" The numbers to make them read what you want to make them read. Also, look at that dyno graph, they're measuring the horsepower gains at the hump in the graph. How shady is that? The hump looks like it was due to a shift from one gear to another, or maybe due to some other fluke. Either way, the way they measured power gain on that dyno is not right, the gain should be measured on a smooth dyno graph, not at a random "hump" in the graph.

Dynojet is the only dyno that we trust to give you 100% uncorrected numbers that are repeatable time after time on any Dynojet in the country with the same vehicle.

Price for the entire system, **** looks awesome and those a great power gains!

Thanks!

 

[BBQ BOY]

We will be doing headers in the next few months as well, and I can promise you that they will be far superior to any other headers out there. You can always buy our exhaust system and enjoy the added power and then do the headers later on when we release them for sale


Those look like they were done on a "DynoMite" dynamometer. I've never used one of those personaly, but on that dyno, Mustang dynos, Dyno Dynamics dynos, Dynapack dynos, and most of the other ones out there it is very easy to "adjust" The numbers to make them read what you want to make them read. Also, look at that dyno graph, they're measuring the horsepower gains at the hump in the graph. How shady is that? The hump looks like it was due to a shift from one gear to another, or maybe due to some other fluke. Either way, the way they measured power gain on that dyno is not right, the gain should be measured on a smooth dyno graph, not at a random "hump" in the graph.

Dynojet is the only dyno that we trust to give you 100% uncorrected numbers that are repeatable time after time on any Dynojet in the country with the same vehicle.


Thanks!

If one were to choose your headers, cats and exhaust system, what would they expect as far sound level, tone and resonance?

 

[Anthony.L]

Why couldn't you just use the DT headers and everything else EMS?

Because I question the DT header quality....

 

[2000UZJ]

Because I question the DT header quality....

There has been one or two reported DT headers cracking. Out of the number sold, I hate to say it. The failure rate is higher than Toyotas million manifolds. I don't question the quality, however I do weigh the cost/time to pull the headers and replace them.

 

[Anthony.L]

There has been one or two reported DT headers cracking. Out of the number sold, I hate to say it. The failure rate is higher than Toyotas million manifolds. I don't question the quality, however I do weigh the cost/time to pull the headers and replace them.

Yup, and you only have to look at the welds on each product to know the attention to detail and quality...

 

[jhrrld]

Turbo manifold please

 

[ckkone]

LIKE ^

 

[RobRed]

Am I reading this right?

Your test vehicle was dyno'd stock at 138.8HP (uncorrected) and 145.96HP. How on earth did a LC loose 81.2HP (uncorrected) and/or 74.5HP (corrected)? I also see a 24HP gain with your full exhaust, which is quite impressive without headers. If these trucks are loosing that much horsepower I may as well be prepared to start pushing it up hills around 2016. I am hoping I read it wrong, but numbers are numbers...

Larger than stock tires, two wheel drive plus CDL doesn't help the base numbers. The difference numbers are most important.

I'll probably get one of these and the DT and put it on the 4 wheel dyno like we did with the DT Headers... Time... need time.

Things I want to see:

full plot not just 2-4k
plot version without smoothing - just to see the effect it has overall.
Sound clips of the truck on the highway at 2500-3000 RPM (Drone?)

 

[Brock]

put new magnaflow and custom bent 2.5 inch pipes on mine today...sound file and pics in build thread in signature. It was either get this now for less than $300 bones installed or get the EMS...so took a chance on this one and if not happy will sell this setup and buy EMS later. So far I love it...