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pacemakers 4499 or 4480 ?? 

 

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Posted: Fri Mar 16, 2007 11:16 am 
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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

 

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Posted: Fri Mar 16, 2007 1:28 pm 
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this topic always confuses me...so I'll just go haltech. LOL

phong =P~

 

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Posted: Fri Mar 16, 2007 7:42 pm 
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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.

 

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Posted: Mon Mar 19, 2007 1:14 am 
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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 :lol:

 

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Posted: Mon Mar 19, 2007 2:33 am 
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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.

 

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Posted: Mon Mar 19, 2007 8:03 pm 
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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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My homemade Exhaust on 88EA sedan. 005.jpg
My homemade Exhaust on 88EA sedan. 005.jpg [ 539.55 KiB | Viewed 41 times ]

 

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Posted: Tue Mar 20, 2007 8:44 pm 
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do you have them on a hi flow cat and 2.5 pipes

 

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Posted: Tue Mar 20, 2007 8:46 pm 
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hows the power gain can you really fell the difference , getting mine installed this friday :D :D

 

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Posted: Tue Mar 20, 2007 8:57 pm 
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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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My homemade Exhaust on 88EA sedan. 009.jpg
My homemade Exhaust on 88EA sedan. 009.jpg [ 485.85 KiB | Viewed 32 times ]
My homemade Exhaust on 88EA sedan. 008.jpg
My homemade Exhaust on 88EA sedan. 008.jpg [ 488.32 KiB | Viewed 27 times ]
My homemade Exhaust on 88EA sedan. 007.jpg
My homemade Exhaust on 88EA sedan. 007.jpg [ 505.56 KiB | Viewed 28 times ]
My homemade Exhaust on 88EA sedan. 010.jpg
My homemade Exhaust on 88EA sedan. 010.jpg [ 523.56 KiB | Viewed 25 times ]

 

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Posted: Tue Mar 20, 2007 9:01 pm 
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sweet cant wait till friday :D :D

 

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Posted: Tue Mar 20, 2007 9:05 pm 
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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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Posted: Thu Mar 22, 2007 5:58 pm 
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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.

 

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Posted: Thu Mar 22, 2007 6:00 pm 
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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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Posted: Thu Mar 22, 2007 6:34 pm 
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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 )

 

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Posted: Thu Mar 22, 2007 6:55 pm 
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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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