aggie-chase

iTrader: (2)

TSP Torqer V.3:
231/234--.644/.598--111 LSA

M6, Pacsetter LTs, Weiand LS6 style intake, magnaflow highflow cats, and flowmaster 80 series.

The Weiand intake has been opened up to 85mm, and the runners have been polished. A ported 85mm TB is also on it.


Got the car dyno tuned this week and it put down 380 rwhp and 370 rwtq. I know that these are a little low for the cam I have, and I am trying to figure out the reason why. I think I know, but I want some other opinions. This car has always been strong, it went 12.9 @110 with just the headers and old LS1 intake.

Anyways, the guy at the speed shop (will remain unnamed for now) , when asked why the numbers were so low, replied that it was the Weiand intake, and that I would get a significant gain if I switched to an LS6 intake. I on the other hand, believe it is the exhaust (cats and flowmaster) that is the main restriction. This thread shows that the Weiand actually flows slightly better than the stock LS6:

https://ls1tech.com/forums/showpost....9&postcount=48

So what is the limiting factor here, exhaust or intake? And please don't tell me about the horrible heatsoaking issues, or tell me to buy a FAST. I think I will add a e-cutout and get it dynoed and see if the numbers don't get bumped up.

bad6as

iTrader: (17)

so im assuming you have a lid?
how old are your plugs, wires, and fuel filter?
do you have a under drive pulley?
most numbers you see are going threw a cut out or dont have cats and have a better flowing number.

aggie-chase

iTrader: (2)

I have a lid, egr!, air!, ect. All the standard stuff except an UD pulley. The plugs are brand new. The wires and fuel filter are not, but I doubt that they have any issues.

Anyone else wanna chime in?

STRIPSTAR

iTrader: (4)

your prob missing 10-15hp and its obviously the flowmaster.

m6speed

iTrader: (11)

thats what i was thinking, try the cutout and see if it frees up that obstruction and gets you better numbers.

Redlinez

iTrader: (5)

According to the Weiland vs LS6 intake thread, it should be spanking the LS6.

AINT SKEERED

iTrader: (2)

i have seen 24 hp difference from my cutout compared to the Edelbrock muffler which is about the same as a flowmaster. Maybe even slightly better then a flowmaster. I would look there first and your cats are maybe costing a couple hp as well. other then that you should do pretty good next time with a cutout

aggie-chase

iTrader: (2)

Thanks, this is what I was thinking. Anyone have any dyno results on cutout vs. flowmaster (or I guess any catback WITH LTs)? Either a link or personal experience?

STRIPSTAR

iTrader: (4)

my car was 470 with cutout open 450 with it closed and thats through a SLP dual which flows well. I think the higher hp you go the more restrictive stock style exhaust gets. The flowmaster catback is particularly restrictive too.

aggie-chase

iTrader: (2)

Bump. What kind of gain do ya'll think I would see with a cutout? 5? 10? 15? 20? I have a date with a dyno on the 21st, so I will let you know exactly then.

BLK02WS6

iTrader: (2)

Seen 20 picked up plenty of times with a cutout on a flow(not)master.

CodeName Z06

What king of highway mileage are you getting with the T3?
Just curious since i am going to install one next month.
And you will probably end up close to 450 once you get the cutout.
My bad thought he had 4 something

bad6as

iTrader: (17)

he wont get 70hp from a cut out

slimcracka

iTrader: (7)

a4 or m6? im assuming its an m6 but i would start with the cut out. btw post a graph might be valve float... the trq is there but the hp is suffering... imo

aggie-chase

iTrader: (2)

It is an M6, and from what I can tell, I haven't lost much mpg at all, but I do have a tune, so that helps some. I have gotten around 20mpg average on a tank. I should also note that I still have the 3.42 gears which helps also. I would be thrilled if I picked up 15-20rwhp...but even more if I picked up 70!!! Haha, if only it was that easy!

I can try and post the graph a little later also.