Race headers+side deletes+stock center. Good or bad?
#18
You can drop 40# by eliminating the side mufflers. This is why you should go this route over a center muffler delete. Also eliminates a lot of heat.
My DMS system (race headers, valved side deletes, stock center muffler) is stock quiet with the valves closed, sex panther when open.
My DMS system (race headers, valved side deletes, stock center muffler) is stock quiet with the valves closed, sex panther when open.
Flaps open and its go time, a little louder than a center bypass, but a MUCH better sound, and you get the full performance as well.
Some, or many, other manufacturers yes lose low end TQ, andsometimes a lot, but our Race header setup makes power everywhere with no loss. dyno proven and by more than just me.
Here is John's Car, 3.6 RS
Here is a 3.8RS, FJ's car
#19
M&M center with side deletes is a great street setup. The center will crack if you track. All centers crack if tracked hard other than the cup. I have cracked three of them so far.
Sharkwerks track exhaust will not crack as it is just a straight pipe. I have one for sale if interested. Taking the car off the track and pulling it to go back to the M&M.
Sharkwerks track exhaust will not crack as it is just a straight pipe. I have one for sale if interested. Taking the car off the track and pulling it to go back to the M&M.
#20
All centers crack, except the M&M, oem Ti quickly, steel a bit slower, Shrky slower still.
Side muffler delete with our without cats and a sturdy strong, nice sounding center is the way to go.
I did not lose TQ with that setup, runs cooler more HP, good sound.
Side muffler delete with our without cats and a sturdy strong, nice sounding center is the way to go.
I did not lose TQ with that setup, runs cooler more HP, good sound.
#21
On my 2nd. DMS system. First was on 996GT3, current on 997.1RS. DMS is engineered specifically for your engine version. First class handmade workmanship, makes power with no loss in TQ, no drone and sounds great!
#22
I'd say you always loose torque below 3k in a GT3 when replacing stock exhaust with something with less resistance in the pipes. That has been very noticable on my own GT3 when moving away from stock, and every single torque curve I have ever seen that goes below 3k show the same. The curves are usually cut at that point, hiding this issue.
I don't believe it is possible to keep up the torque at very low rpm's on a high revving NA engine when the exhaust is freed up for maximum power.
I don't believe it is possible to keep up the torque at very low rpm's on a high revving NA engine when the exhaust is freed up for maximum power.
#23
I'd say you always loose torque below 3k in a GT3 when replacing stock exhaust with something with less resistance in the pipes. That has been very noticable on my own GT3 when moving away from stock, and every single torque curve I have ever seen that goes below 3k show the same. The curves are usually cut at that point, hiding this issue.
I don't believe it is possible to keep up the torque at very low rpm's on a high revving NA engine when the exhaust is freed up for maximum power.
I don't believe it is possible to keep up the torque at very low rpm's on a high revving NA engine when the exhaust is freed up for maximum power.
Most of mine I start at 3-4000 because I am not needing to spend excess time down there, so it is pointless to start a dyno pull at 1000rpms if you are tuning or working at 5-8500.
#24
i ran FVD headers catless, side bypass and center bypass, was loud as all hell but it actually had more torque down low and up top power. I want to say it's mainly b/c of the headers more so than it being free flowing or it could have been b/c the car was 40-50lb lighter, or the combination of the two.
#25
Since I have DMS header on my 3.6 engine, I don't down shift from 6th to 5th as often on highway cruising. Much more friendly for street driving.
I used to have a 997S and I love the 3.8 low end torque for daily use.
I paid for the noise control, drivability in town and performance on the track. For the stock center durability, will see in the next couple years. Not my concern at this stage.
I used to have a 997S and I love the 3.8 low end torque for daily use.
I paid for the noise control, drivability in town and performance on the track. For the stock center durability, will see in the next couple years. Not my concern at this stage.
#27
For stock set up except side muffler delete pipes, do you guys recommend valved or unvalved?
Do the valved delete pipes make the annoying closed and open sound as you increase RPM s like the stock side muffler set up?
Do the valved delete pipes make the annoying closed and open sound as you increase RPM s like the stock side muffler set up?