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| SlickNCGhia |
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4499 are low - mid. 4480s are high ...ie tuned lenght for competition. i dont know why everyone thinks its the other way
_________________ NC Fairlane Ghia. AU engine. Pacemaker 4499. 2.5" Redback Zorst, tints, red dash. 17in ba xr (e-series). Suzuki Across (suzi) Sexy in Black |
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| phongus |
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this topic always confuses me...so I'll just go haltech. LOL
phong =P~
_________________ phongus = Post whore 2006 |
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| cjh |
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Any performance header/extractor, for an inline 6, should have its oposite cyl linked in a pair, meaning 1 & 6, 2 & 5, 3 & 4. then join together in a triple union/collector. The original factory headers from an 84/85 VK 3.3 Dunnydore with EFI had those type. They make power because they scavenge better. Same deal goes for the V8's, the ones that all collect at a single 4 into 1 collector are better for scavenging.
_________________ http://youtu.be/jJTh9F3Vgg0 |
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| Ragvaror |
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SlickNCGhia wrote: 4499 are low - mid. 4480s are high ...ie tuned lenght for competition. i dont know why everyone thinks its the other way
Good point, coz I thought that and thats the impression I got from reading things here. That 4480's were lower range, 4499's higher. I knew the comps were tuned length for racing tho. SO the 4499's aren't tuned length, which is why they're cheaper and have the lower power band? f**k, that completely changes my method of thinking... Ah well, I was looking into the Walker Motivator's anyway 
_________________ Sanity is for the Weak!! |
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| Gaz |
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^^
no other way. the 4480 competitions are tuned length with smaller primaries, higher exhaust velocity due to small pipe blah blah, better low end, 4499's bigger primaries will give you better top end and less down low. all in all, on the street your really going to notice f**k difference. if you think your pants can dyno 1-2kw then go for it. for me the extra 150 or what ever they were didnt justify the price.
_________________ 2007 Steel BF Ghia MKII V8 - 19" GTP's + Superlows |
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| cjh |
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The 4480's aren't quite tuned length. you only have to look at them to see that. I got them coz thats what i wanted. And they siut what I going to do with it.
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| trebba |
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do you have them on a hi flow cat and 2.5 pipes
_________________ -----FG MK2 XR6 UTE----- |
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| trebba |
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hows the power gain can you really fell the difference , getting mine installed this friday
_________________ -----FG MK2 XR6 UTE----- |
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| cjh |
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Yep, heaps of difference over the std exhaust. I found it pulled further up the rev range, and harder.
The CAT is a modified BMW unit, 2&1/2" in and twin 2&1/4" out down to the muffler and single 2&1/2" out.
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| trebba |
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sweet cant wait till friday
_________________ -----FG MK2 XR6 UTE----- |
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| cjh |
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I made it that way so it doesn't drone like a single 2&1/2" system usually does. But still flows good.
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| Ragvaror |
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Depends what you're paying attention too, because im not looking for overall top end power gains, I'm looking for quicker accelleration off the line.
_________________ Sanity is for the Weak!! |
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| cjh |
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Ragvaror wrote: Depends what you're paying attention too, because im not looking for overall top end power gains, I'm looking for quicker accelleration off the line.
Are you saying my design is making it slow off the line???? How did you arrive at this conclusion???
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| kostah |
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Age: 36 Posts: 118 Joined: 29th Jan 2007 Ride: EA fairmont, 4.0litre el xr6 eng Location: Melbourne |
fight fight fight fight.... i rkn that lowerend is more usefull if your going to be driving on the street so go for the 4499's and go race a commodore nad kill him so your proud of the money you spent.
if you want ill give u a run in my mates gemi :p hes got a 3.8 litre ecotec engine in it ( still runs like s**t though )
_________________ I live my life qtr mile at a time |
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| cjh |
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kostah wrote: fight fight fight fight.... i rkn that lowerend is more usefull if your going to be driving on the street so go for the 4499's and go race a commodore nad kill him so your proud of the money you spent.
if you want ill give u a run in my mates gemi :p hes got a 3.8 litre ecotec engine in it ( still runs like s**t though ) I got plenty of bottom end pull, try 3.50 1st gear with 3.27 LSD diff gears. Gotta change into 2nd at 60kmh. I liked the ol Val of mine, change out of first at 90kmh, or with the other diff, 100kmh, and 3 more gears to go.
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