Searching for 30hp, Where can I find it?

james22 · 28-06-2007, 08:58 AM

As the title says, i'm looking for 30hp as cheaply as possible. If I can find it somewhere, that'll give me my 300rwhp. I figured its a nice round number

. I know that figures vary from dyno to dyno, but at least it would be in the vicinity anyway.

So where do I start.

Current Mods include;

Original Dual 2.25" press bent exhaust system, with resonators removed, so effectively a straight thru exhaust with the little original dual muffler at the rear.

Pacemaker Tri-Y's - PH 4001

BPT Powerstat

BPT 3/8" Phenolic spacer

K & N Panel filter

Edit box (no tunes loaded)

And it would be preferable to achieve this 30hp, leaving the engine un-opened. I'm trying to see how much I can get outta the old dinosaur 5L before cracking it open.

james22 · 28-06-2007, 09:58 AM

HLC · 28-06-2007, 10:13 AM

i'd say get an after market exhaust with cats and edit. but lets see what some of the more knowledgeble people say.

stiddy · 28-06-2007, 10:17 AM

Quote:

Originally Posted by HLC

i'd say get an after market exhaust with cats and edit. but lets see what some of the more knowledgeble people say.

Sounds good to me.

mr_xr8 · 28-06-2007, 10:34 AM

by the sounds of it it is untuned
if so you should have no problem getting around that power from the tune
i got 21.7rwkw when i got mine tuned

james22 · 28-06-2007, 10:58 AM

Do you think cats really make a difference? My exhaust joint said it will do SFA really, especially for the price.

How much do you think I could get out of a high flow muffler on the back? The current one (std tickford) needs replacing anyway cause its got a hole in it.

StealthAu · 28-06-2007, 11:07 AM

Just replace the whole exhaust, and then get it tuned. You won't get **** by just replacing the rear muffler

MRJUCY · 28-06-2007, 11:18 AM

Opened unopened who cares just go fast, Shaynet just got around 27rwkw from a set of AFR 165s & a retune on his T3 he reckoned around $2500 for the heads & gaskets etc to fit them up.

james22 · 28-06-2007, 12:15 PM

Quote:

Originally Posted by MRJUCY

Opened unopened who cares just go fast, Shaynet just got around 27rwkw from a set of AFR 165s & a retune on his T3 he reckoned around $2500 for the heads & gaskets etc to fit them up.

I care, as said above I want to get the most out of the 5litre as possible before opening it up. I also said as cheaply as possible, and heads for around $2500 isnt what i'm after.
I know a cam, heads, stroker etc will get me the power, but I want the most out of it un-opened. I want to see exactly how much potential the 5L has, before opening. The more power I have b4 I open it up, means more power when I do swap heads, cam etc.

james22 · 28-06-2007, 12:21 PM

Quote:

Originally Posted by stockoau

Just replace the whole exhaust, and then get it tuned. You won't get **** by just replacing the rear muffler

I'm not to keen on changing the exhaust. I really like the way it sounds now, and the exhaust joint doesn't think my current system is very restrictive. Even though it is press bent, he thinks I will loose torque going to another exhaust, because the current system is very free flowing as it is only going through one muffler. He thinks a new larger system would require more mufflers to increase backpressure to stop loss of torque.

Make sense anyone?

: lol

mr_xr8 · 28-06-2007, 12:33 PM

G&D intake would be first on my list

JC · 28-06-2007, 12:53 PM

G&D Intake and a tune for the Shell100 octane fuel (VMax??) should see around 30rwhp gain. The tune on 94 or 96/98 PULP won't nett the same, but as you're only after a dyno pony, the VMax tune should see the numbers you want.

It may actually be cheaper for you to chase 200rwkw (another nice round number), instead of 300rwhp. Your current power of 270rwhp is 201.4 rwkw, so you just need a way to lose 1.4 rwkw (1.9 rwhp). A banana in the tail pipe may work to achieve that.

StealthAu · 28-06-2007, 01:02 PM

Try talking to another exhaust shop

james22 · 28-06-2007, 01:03 PM

Quote:

Originally Posted by JC

G&D Intake and a tune for the Shell100 octane fuel (VMax??) should see around 30rwhp gain. The tune on 94 or 96/98 PULP won't nett the same, but as you're only after a dyno pony, the VMax tune should see the numbers you want.

Sounds good, Is the G & D box worth the cash though? Seems like alot of money for a minimal increase. When I had the car on the dyno, the operator said I should cut the bottom of my airbox out to increase air volume/flow around the filter. Thinks that would give a small peak increase in hp

Quote:

Originally Posted by JC

It may actually be cheaper for you to chase 200rwkw (another nice round number), instead of 300rwhp. Your current power of 270rwhp is 201.4 rwkw, so you just need a way to lose 1.4 rwkw (1.9 rwhp). A banana in the tail pipe may work to achieve that.

Smartarse lol

200rwkw, when I bought the car would be plenty enough to scare the **** outta me, but the more power I get, Over time the slower my car "seems" to be. Strange that. Damn bug lol

james22 · 28-06-2007, 01:05 PM

Quote:

Originally Posted by stockoau

Try talking to another exhaust shop

I'll do that, I'm just not real keen on changing the exhaust. I really like the way it sounds now, and no-one wants to do twin systems without ripping you right off.

JC · 28-06-2007, 01:06 PM

Quote:

Originally Posted by james22

Smartarse lol

200rwkw, when I bought the car would be plenty enough to scare the **** outta me, but the more power I get, Over time the slower my car "seems" to be. Strange that. Damn bug lol

Yep - happens to all of us. One day your car has power, and then next you need more!!

On a mate's AU2 XR8, drilling a 75 mm hole in the front of his airbox, and a proper tune netted around 15rwkw (approx 20rwhp). The G&D box is said to be worth around 8rwkw, so that's another 10rwhp, giving you 30 all up.

But, the banana in the tailpiupe is definitely the cheapest option to an even number!

falzoony · 28-06-2007, 01:12 PM

Quote:

Originally Posted by JC

The G&D box is said to be worth around 8rwkw

How much are these worth?

LOWAU · 28-06-2007, 01:16 PM

My mate got a twin 2.5" system on his au XR8 ute with a main muffler, 2 resonators and chrome tips for $600 installed. I thought his previous exhaust with twin 2.25" sounded good but now it sounds much much better.

I would go the twin 2.5" exhaust with the cats enlaged to 2.5" and a proper cold air intake, G&D intake is good but $600 good not sure on that. all this with a custom tune and you should be laughing.

**Peuty** · 28-06-2007, 01:43 PM

I would go the full twin system, I got mine done on the XR8 and haven't looked back since!

RG · 28-06-2007, 03:16 PM

G&D airbox is around the $600 mark and is definately worht the $$$ just for the induction sound let alone the power gains. I got 20rwkw and a bucket load of torque from the flash tune and the airbox. Also 300rwhp isn't as easy as you may think, mine is at 297rwhp with the stroker. But then again mine is set up for low end torque.

james22 · 28-06-2007, 03:24 PM

Problem is, my exhaust is that loud, i'd never hear the induction noise anyway LOL, sounds like the go though. Might get the G & D box, and then go see Spiro for the flash tune. Thats gotta get at least 300rwhp if not more :-)

270rwhp current - 300rwhp goal. Tune and airbox should do that???

GK · 28-06-2007, 03:26 PM

Quote:

Originally Posted by JC

Your current power of 270rwhp is 201.4 rwkw, so you just need a way to lose 1.4 rwkw (1.9 rwhp). A banana in the tail pipe may work to achieve that.

Go ahead, take those bananas! LOL!

I reckon talk to G&D about what options you have for the project budget.

GK

StealthAu · 28-06-2007, 03:31 PM

You also want to get you're exhaust replaced. You might like the way it sounds but it will more then likely souund better and will help with the power hunt

james22 · 28-06-2007, 03:33 PM

^^^ true, but nobody wants to do twin systems, and if they do, they charge the earth and heavens for them. And if it didn't sound as good, I would be mega ****ed.

StealthAu · 28-06-2007, 03:39 PM

Don't worry about sound, as it will sound better. Even a big single system would work and sound better.

mr_xr8 · 28-06-2007, 03:42 PM

Quote:

Originally Posted by RedXR347

G&D airbox is around the $600 mark and is definately worht the $$$ just for the induction sound let alone the power gains.

i agree its the second best money i have spent the best being the tune

Quote:

Originally Posted by james22

Problem is, my exhaust is that loud, i'd never hear the induction noise anyway LOL, sounds like the go though. Might get the G & D box, and then go see Spiro for the flash tune. Thats gotta get at least 300rwhp if not more :-)

270rwhp current - 300rwhp goal. Tune and airbox should do that???

spiro is a master of the flash tune, dont be to worried if tha car falls a little short of the power goal.
the way it will drive after spiro works his magic will be the most impressive

Soundwarp · 29-06-2007, 07:16 AM

Quote:

Originally Posted by james22

I'll do that, I'm just not real keen on changing the exhaust. I really like the way it sounds now, and no-one wants to do twin systems without ripping you right off.

Mate see my exhaust (In my sig)
$2k from RDP, that got me 20rwhp more

What are these:
BPT Powerstat

BPT 3/8" Phenolic spacer

Do you reccomend this:
K & N Panel filter

Soundwarp · 29-06-2007, 07:20 AM

Quote:

Originally Posted by james22

^^^ true, but nobody wants to do twin systems, and if they do, they charge the earth and heavens for them. And if it didn't sound as good, I would be mega ****ed.

i have a twin system and i never dreamed a new car could sound this good.

Soundwarp · 29-06-2007, 07:22 AM

Quote:

Originally Posted by mr_xr8

i agree its the second best money i have spent the best being the tune

spiro is a master of the flash tune, dont be to worried if tha car falls a little short of the power goal.
the way it will drive after spiro works his magic will be the most impressive

Got any pics of the 2 airboxe's together?
I assume this G&D one is better than my XR8 one?

james22 · 29-06-2007, 07:49 AM

Quote:

Originally Posted by Soundwarp

What are these:
BPT Powerstat

Lower temp, thermostat, Instead of standard 192*C - this one is slightly cooler at 180*C

Quote:

Originally Posted by Soundwarp

BPT 3/8" Phenolic spacer

It is a 12-13mm spacer, that sits between your upper and lower manifold. It reduces heatsoak and slightly increases runner length increasing torque slightly.

Quote:

Originally Posted by Soundwarp

Do you reccomend this:
K & N Panel filter

A G & D airbox would be way way better. But if you still have your stock xr induction system, then a highflow filter can give minimal increases. Biggest advantage is that is it re-usable.