View Full Version : Stock LS6, stock catback, MAF, throttlebody, free mods Headers and ORY makes 375


FASTFATBOY
10-24-2011, 05:52 PM
Car runs good, Tuned by Edcmat-l1 via E mail(GREAT guy to deal with), had 180 miles on the new engine.

Stock rebuild except for Mahle pistons, ARP rod bolts and balanced. LS1 shortblock.

Heads, cam and intake off a 2002 Z06 untouched, PAC 1218 springs.

Pacesetter headers and ORY, stock catback with Magnaflow muffler and Bullet in I pipe.

Free mods, lid.

Stock Z28 MAF and throttlebody.

My Wideband in the collector read .4-.5 richer than the dyno's tailpipe wide band.

With a better catback, 85mm maf, lid and throttlebody what would it pickup?

Here is the graph, made two pulls the 375 pull was the indicated 13.99 A/F ratio which indicated 13.3 on my wideband. I loaded the richer tune back in which was 12.8 on my wideband, needs to be a safe tune as its a road race car.

http://i1122.photobucket.com/albums/l528/FASTFATBOY1/z28tune5and6withtorque.jpg

30th t/a
10-24-2011, 08:48 PM
Do you have a LS6 intake?
If you get those other mods I think you might be close to 390rwhp.

FASTFATBOY
10-24-2011, 08:53 PM
Do you have a LS6 intake?
If you get those other mods I think you might be close to 390rwhp.

Yes it has the LS6 intake.

I was kinda disappointed, my buddy pointed out I had a stock catback, stock MAF and TB. He said with the Z06 85mm TB and MAF and a better catback it might break 400 to the wheels.

Car is nice to drive, power everywhere, drives like a stocker.

30th t/a
10-25-2011, 07:15 PM
I was planning using LS6 heads & cam along with the rest of the boltons and from my research 390 seems about what to expect. A few have gotten 400rwhp.

Im not sure If I want to go the LS6 route. I really want lots of low and mid range power and the LS6 cam doesnt start making its power over the LS1 can until 4000rpms and then it takes off.

FASTFATBOY
10-25-2011, 07:37 PM
I was planning using LS6 heads & cam along with the rest of the boltons and from my research 390 seems about what to expect. A few have gotten 400rwhp.

Im not sure If I want to go the LS6 route. I really want lots of low and mid range power and the LS6 cam doesnt start making its power over the LS1 can until 4000rpms and then it takes off.


Yeh, I think the smaller F body MAF, throttlebody and stock catback are choking it a little.

I dont have all the other tricks either.

UD pulley, electric water pump etc.

Car runs good though. Drives just like a stocker.

itsslow98
10-26-2011, 04:20 AM
I made 366 in my cts-v with just long tubes with high flow cats and cold air intake, stock untouched throttle body. Thats through a heavy ass clutch setup(50lb flywheel) and through an IRS rear. So your right on par IMO.

30th t/a
10-26-2011, 08:01 AM
Yeh, I think the smaller F body MAF, throttlebody and stock catback are choking it a little.

I dont have all the other tricks either.

UD pulley, electric water pump etc.

Car runs good though. Drives just like a stocker.


what gears do you have? I think a set of 3:90 or 4:10s would would really well with that setup.

Yea, A U/D pulley, ported TB & a better catback would definately help. I think your numbers are right on par with your current mods.

SS MPSTR
10-27-2011, 09:55 AM
Nice power, with a super reliable combination.

FASTFATBOY
10-27-2011, 10:20 AM
what gears do you have? I think a set of 3:90 or 4:10s would would really well with that setup.

Yea, A U/D pulley, ported TB & a better catback would definately help. I think your numbers are right on par with your current mods.

Stock 3.42 gear, this is a HPDE roadcourse car it will keep this gear.

SS, this car drives like a stocker, will kill the tires anywhere in 1st gear and most of second.

It's a BALL to drive, can't wait to get it on track. I am going to Roebling Road in Ga on Nov 5-6.

5w20
10-27-2011, 12:51 PM
on par

like you said lots of "little things" are missing

cali_bear2003
10-27-2011, 01:54 PM
OP, I agree with you..."SS, this car drives like a stocker, will kill the tires anywhere in 1st gear and most of second". I have an LS6 crate in my 02 A4 Z28 with 3:42's in the back. I do have JBA shorties with full Magnaflow out the back. Like the others have said, replace your stock cat back system, that is your bottle neck. The MAF should be more then enough, just either buy or have your throttle body ported. If you replace the cat-back and port the TB, you will notice a difference.

evil02z
10-27-2011, 02:42 PM
Also the Pacesetter ORY merge has also been know to be a restriction. Consider getting the TSP ORY or purchasing a flowmaster style merge. The factory catback I-pipe is 2.75" A full 3" catback would open up some. A UDP should open up power down low.

FASTFATBOY
10-27-2011, 09:29 PM
Also the Pacesetter ORY merge has also been know to be a restriction. Consider getting the TSP ORY or purchasing a flowmaster style merge. The factory catback I-pipe is 2.75" A full 3" catback would open up some. A UDP should open up power down low.

Yeh I looked at the Pacesetter ORY and it is kinda crappy, where the pipes come together is bad. But I already had it.

Does the TSP pipe hook directly to Pacesetter headers?

I like the muffler setup I have, so I only need the I pipe that goes over the axle, can you buy that seperately anywhere?

wysemunky
10-29-2011, 08:17 PM
you could do a magnaflow merge and I think walker or dynomax makes a replacement 3" I pipe.

redbird555
11-04-2011, 04:26 PM
At first when i looked at the mods list I thought it was low seeing as z06 cars will dyno around 350 stock wit an irs while the fbody has a live axle so it should even be a little higher however there are some things that would really help you out.
The stock catback as mentioned could be changed...
The z06 tb is the same size as ls1 so i dont really see that being a restriction but a ported one would probably pickup a few hp.
An udp should net a good gain.
Also that pacesetter merge isnt the best change that out with the catback.

Ive seen quite a few bolt o ls6 fbodys go around 400whp while full bolt on z06's sit around 390 because of the irs fix the little mod quircks and I think that car could touch 400.

Damian
11-05-2011, 02:39 PM
Not to poop in anybody's corn flakes but those are STD #'s, which will be about 10/10 less on both sides when converted to a real SAE #.

But, that's about right for an LS6-spec engine with those mods.

redbird555
11-06-2011, 01:24 AM
So you're saying that it would be even lower when corrected to sae? Dyno's are merely a tuning tool and this one could be off but z06's normally dyno around 350-360 stock, that's through an irs also which would not suck power in the fbody due to its having a live axle. So yes I find it a little hard to believe a full bolt on ls6 camaro with a 6spd is only making 375, c5 ls6 cars usually do around 390 on corvette forum and ls6 swapped fbodys have hit 400 multiple times. Again the dyno is a tuning tool but those numbers have been replicated time and time again. I think that the op's some what under par numbers are due to still having the unported tb, a bad y merge, and an underdrive pulley would help out as well.

FASTFATBOY
12-30-2011, 09:14 PM
I took it to the track, in 65* 100% humidity air it did run almost 115 mph in a 3800lb car, it did ok I think.

adamantium
12-31-2011, 01:43 AM
I took it to the track, in 65* 100% humidity air it did run almost 115 mph in a 3800lb car, it did ok I think.

Ive seen bolt on ls1's trap that mph.

redbird555
12-31-2011, 08:29 AM
no you havent a FULL WEIGHT ls1 car is not trapping that mph without a cam or weight reduction

82cetuner
12-31-2011, 09:01 AM
I doubt that also it would have to have some SERIOUSE bolt ons

FASTFATBOY
12-31-2011, 11:05 AM
You have seen a bolt on car at 3800lbs run 115 mph? In 100% humidity?

Dont exceptional bolt on cars make 350 ish to the wheels?

Something about that doesn't add up.

I think my MPH is pretty good for 375 to the wheels and 3800lbs.

EDIT

Guess I need to get the 85MM MAF, a 3 inch catback, A better Y pipe, ported throttlebody and see what it does.

s346k
01-01-2012, 10:26 AM
no you havent a FULL WEIGHT ls1 car is not trapping that mph without a cam or weight reductioni have only seen one car trap more than 115 at full weight with bolt-ons. he had a lid, mac mids, cutout, 410s, and DRs. the car was legit. nothing removed, no tricks, it was a real "factory freak". i watched the car go from dead stock to a mild bolt-on car, it picked up stupid gains with little mods. trapped 106ish bone stock. 108 with a lid/cutout. 112 with mac mids and 114+ with 410s. stock tune even.

op: i am interested in an ls6 setup simply due to the driveability and reliability. i drive this car A LOT and really don't want to deal with a monster cam and driveability issues just to trap 118 or so. i think an ls6 cam with a ported/port matched vic jr setup would do well. we will see. i want to do something different.

redbird555
01-01-2012, 05:35 PM
i love my ls6 in my car. it drives just like stock and has been great it put down 370whp with the mods insig on a mustang dyno with an unlocked converter. I have no doubt through a 6 speed it would be knocking on 400whp which is on par for some z06's and what other m6 fbods seem to do. the ls6 is a little lazier down low than an ls1 due to the cam and heads but above 3500 it pulls HARD. I didnt really notice it until I jumped in my buddies bolt on ls1 last week and the car just felt sluggish when i would get on it but down low it def had a little more torque

Damian
01-02-2012, 09:12 PM
Your car definitely has potential for 400rwhp with a better flowing catback. At those power levels the stock muffler is easily robbing 20rwhp. Throw a cheap cutout on it for the time being and try again.

Don't kid yourself on the MAF/TB. Gains made with larger MAF / TB's on a stock LS6 are negligible. A stock MAF with a well ported stock TB is not going to be a hindrance with a stock LS6 intake with those mods. You will see a few hp with larger stuff, but it will not warrant the cost. Anybody that thinks so reads the internet way too much.

Spend your money on the exhaust system and I think you'll be very happy with the results.