Threw my Pacemakers away

[Go fast]

I recently bought a set of Pacemakers and redback system to go onto my newly purchased low milegage VX SS. After having them fitted I found that it lost grunt down low.
A couple of my mates then suggested hm headers so I shelved the Pacemakers and redback system that boomed its ass off and bought hm headers hm101ss. I didn't know that they also make performance exhaust systems but they sell this under the Perry brand name so I purcahsed their hm120dtirs with a set of cats hm718 and fitted both and difference was amazing. Much better torque down low and no need for a PCM tune!!! And even better they are stainless headers and not mild steel!!! :p

[Tonner]

Perry,Can you give us more info on the Paceys you sacked

[fatas]

I recently bought a set of Pacemakers and redback system to go onto my newly purchased low milegage VX SS. After having them fitted I found that it lost grunt down low.
A couple of my mates then suggested hm headers so I shelved the Pacemakers and redback system that boomed its ass off and bought hm headers hm101ss. I didn't know that they also make performance exhaust systems but they sell this under the Perry brand name so I purcahsed their hm120dtirs with a set of cats hm718 and fitted both and difference was amazing. Much better torque down low and no need for a PCM tune!!! And even better they are stainless headers and not mild steel!!! :p
pm me if you want to sell the pacies

[markone2]

no need for a PCM tune!!! :p


There-in lies the key to this mystery ;).........imho

[PepeLePew]

Like he said.

And perhaps the Pacies were just too big for your application....

[YLD57L]

Yeah after fitting a pacies and a twin 2.5" difillipo system I lost 10rwkW and torque. After a tune I gained 40rwkW, torque and throttle response. This biggest gains were had in the mid range wack. Mine are 4 into 1 1.75". It is MAFless though.

[xshore]

No point letting those pacies go to waste ? I don't have headers as yet. PM me a price.

[OLS108]

I recently bought a set of Pacemakers and redback system to go onto my newly purchased low milegage VX SS. After having them fitted I found that it lost grunt down low.
A couple of my mates then suggested hm headers so I shelved the Pacemakers and redback system that boomed its ass off and bought hm headers hm101ss. I didn't know that they also make performance exhaust systems but they sell this under the Perry brand name so I purcahsed their hm120dtirs with a set of cats hm718 and fitted both and difference was amazing. Much better torque down low and no need for a PCM tune!!! And even better they are stainless headers and not mild steel!!! :p
IMHO u would have better served to keep the pacemakers and redback and spent the money on a good maffless tune, but as long as ur happy then good for you, how much was the new system ?

[COUPE]

I recently bought a set of Pacemakers and redback system to go onto my newly purchased low milegage VX SS. After having them fitted I found that it lost grunt down low.
A couple of my mates then suggested hm headers so I shelved the Pacemakers and redback system that boomed its ass off and bought hm headers hm101ss. I didn't know that they also make performance exhaust systems but they sell this under the Perry brand name so I purcahsed their hm120dtirs with a set of cats hm718 and fitted both and difference was amazing. Much better torque down low and no need for a PCM tune!!! And even better they are stainless headers and not mild steel!!! :p

Not sure ... did you go from a 4-1 to a Tri-Y? ... Anyway I've spoken to many who have experienced same thing gaining torque and avg hp with the switch to HM Tri-Y's and that’s even after a tune ... People say you need a tune? So are they saying with the HM you won’t get any benefit form a tune? What only pacies will give you a benefit? I DONT THINK SO! Lots of crap on the forum about extractors. The humble HM header works and is proven.

Anyway I think this might of been posted before ... but it's a great read for anyone who wants to argue 4-1 over Tri-Ys for street applications ... If Tri-Y 's are good enough for NASCAR I think they'll be more than right for our street cars. There is greater potential in the right Tri-Y design than a 4-1 can ever offer.


The Sultan of Stainless
Jack Burns is Rewriting Header Science

http://popularhotrodding.com/tech/0310phr_burns/

[8throttlebodies]

But the main problem is no-one makes a bigger enough tri-y, thats why people are moving to 4-1s.

I have used tri-ys for 12 months now, and am only just moving to 4-1s due to the cam I had just installed.

I have Pacey 1 5/8 tri-ys and found a big improvement over stock, even with no tune.
But will now get more out of the 4-1s.

8tb

[Tonner]

You have 1&3/4" primary pipes the 1&5/8" tri Ys might have done the job for a stock cam. IMO.

EDIT:Oh yeh what he said above

[fatas]

No point letting those pacies go to waste ? I don't have headers as yet. PM me a price.
I ASKED FIRST YOU WAIT. PLEASE :)

[COUPE]

But the main problem is no-one makes a bigger enough tri-y, thats why people are moving to 4-1s.

I have used tri-ys for 12 months now, and am only just moving to 4-1s due to the cam I had just installed.

I have Pacey 1 5/8 tri-ys and found a big improvement over stock, even with no tune.
But will now get more out of the 4-1s.

8tb

Have you had a look at DIY DiFilippo's Tri-Y kit's ?

I'm sure any exhaust shop can put a set together without too much fuss.


They have many different sizes ... unless they don't offer them anymore? ... but they're on their web site:

Di Filippo V8 Try Y Kit

Primary
1-5/8"
1-3/4"
2"

http://www.darrendifilippo.com.au/diy_kits.html


Side note: I went for a ride in a (Higgins-heads and Comp Cams) package SS a few weeks ago ... It had HM Tri-Y's and redback cats back system (they had dropped the pacie 4-1 and got a hell of a lot more "real gains", again this avg hp that many people in the know talk about ... too many ppl get stuck on top end hp figures ... the thing was bloody awesome on the street.
From memory it had just under 400hp at the wheels but on a dynologic dyno I think ... but I remember seeing the torque and power curve (A/F ratio was also on the conservative side ... none of this crazy 14 stuff I've been hearing about by one tuner :eek: ) ... no dips or anything ... so smooth and strong from down low.

[IH8WRX]

I had a set of HM headers and a Redback system on my car til the start of this year when I did all my engine work. I also own a VS SS M5 and it has Pacemaker headers with 2.5" bigbore system and it sounds like a Harley from the outside but no drone inside. I was very dissapointed with the VX exhaust system so I swapped 6mths ago to a set of ceramic coated Pacemaker 1&3/4" 4-1's with a Sureflo single 3.5" system and new cats.

I'm over the moon with the new system, and couldn't be happier. It sounds great from inside and out, bit doughy off the mark but that's to be expected with a stock engine and big system. Only part I'm pissed off about is the system is to low causing me to be defected (85mm off the ground :mad:) and one bloody cat has shit itself after only about 150km :mad:

[Thunder]

Anyway I think this might of been posted before ... but it's a great read for anyone who wants to argue 4-1 over Tri-Ys for street applications ... If Tri-Y 's are good enough for NASCAR I think they'll be more than right for our street cars. There is greater potential in the right Tri-Y design than a 4-1 can ever offer.



What everyone forgets is the Gen3 is different to any other car. All other cars have the choice of 1 set of tri-y and 1 set of 4>1 and all different brands are basically the same as each other in design.

Gen 3's have the choice of 1-1/2", 1-5/8", 1-3/4" & 1-7/8" long 4>1 extractors. You then have another couple of mid length 1-5/8" 4>1 as well as another few very short 4>1 extractors.

Then you have the choice of a few different styles of tri-y as some manufacturers collect the pipes in different firing order. Then you have the choice of press bent & mandrel bent in the tri-y.

Pacemaker have 4 different 4>1 plus a set of Tri-Y so there is a set to suit any application, driving style & budget. So if there was a problem with the Pacemakers, it was obviously the choice of extractor picked in the first place.

HM are press bent & Pacemaker are mandrel bent. The stainless steel is only 409 - stick a magnet on it and tell me why it is better. It will crack in the collector with the heat and the slip joints will wear with age and leak. Ceramic coated mild steel is much better - won't rust, cuts the heat down by half, is less prone to cracking, and around the same price.

I know which one I prefer :cool: and I make more money out of selling other brands.

[SLE355]

Why dont Pacemaker make a 1-3/4" tri-y for the LS1, like they do for the Holden V8?

[hogs]

Evening,

I based my purchase on the test of many extractors done by Sam's and published in Street Machine. There is a thread here somewhere which has all of the results on it. I have a set of HM 1000s Tri Y's and an ESA twin 2.5 system.
The published test suggested that I would get peak torque @ 3800rpm, and upon my first Dyno run at the 2004 Nationals, it came in @ 3750.
I based my decision on the fact that LS1's lack a bit down low, I do not want a car that has to be at peak revs to get things happening and it is a daily driver. I am very happy with my choice and still have got 237rwkw's and a 1/4 of 13.7 out of an unopened Wagon.
Nuthin wrong with Tri y's IMHO!
BTW, sound great too, ask Grant,"HRT8"

Cheers,

Hogs, :)

[gtr355]

i am interested in a set of 4 into 1 pacies with the ceramic coat but i dont know what size to get.will i have to let you know before i come to you guys and get my exhaust done so u can order stock or will u have all the sizes there.i plan to just do bolt on mods to my car, incl diff gears.would i go the 1.625 or the 1.75 inch primaries.is there a difference in price with different sizes?

[drone14]

Have Pacey Tri-Ys and Di-Fillipo twin 2.5" cat back and fixed the torque hole up beautifully - even before the edit. After the edit it was great.

Got to say I love the sound too - nice and throaty down low and very angry sounding when you boot it. :D

[markone2]

Pacemaker Tri-Y's.....Redback off the shelf....cam...no problems from this corner ;)

[SV8VY]

Pacemaker Tri-Y's.....Redback off the shelf....cam...no problems from this corner ;)I have the Red back system on mine and Hm ceramic coated headers with some decent power...with edit .
I don't see the problem at all.

[Ricko]

I had a full HM system and ditched the HM cat back for a Sureflo system and gained 15.5rwkw. :D