Camshaft Specs
#13
02-07-2007 | 11:20 PM
Thread Starter
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1st Gear
Joined: Dec 2006
Posts: 134
RE: Camshaft Specs
Great links guys. It looks like I have my homework set out for me but hey what man doesn't like the challenge. I will plan on doing the install right after I get my tax return back so hopefully in March. When I do the install I'll get as many photos as I can and try to correspond them with the Bentley manual as sometimes their pics can be a little hard to make out. Also I've yet to purchase a VAG-COM but I have heard that you can do a simulated dyno run with them. Is this true? Because when I post I'd like to be able to put a dyno chart with the pics. This has now become the topic of a new post.
#14
02-08-2007 | 02:54 AM
I'm make believe
Joined: Dec 2006
Posts: 17,587
From: In my head
RE: Camshaft Specs
Man you are some kind of special.
ORIGINAL: ttoo cool
I beg to differ as an engineer. Many of you will claim that cams do not have a big impact on the performance of a turbocharged engine but you are dead wrong. Remember all engines operate exactly the same way so the enhancement that would occur on an NA motor would be even more pronounced with a turbo. I installed HKS 264 degree cams on my SR20 and the increase in power was over 20hp peak at a higher rpm than stockand the powerband grew larger by over 400rpm.
You are comparing two completly differnt heads. If i was to compare a normal small port 1.8t vs a b-series honda head the flow would laughable about how much more the b-series flows. Plus how were these tuned? plus a basic sr20 runs a t25 wich is still 40-50hp more than a ko4-2x. Once again apples and oranges.
As to the valvetrain issue, if you own the 225 motor the car comes with an upgraded valvetrain (This is one of theseemingly infinitereasons to buy a 225 over the180).
aahhh what?? The valvetrain is the same. The only head that is any differnt is the aeb (96-99 a4/passat) head which has a large port head compared to the rest that are small port aka suck at flowing.
Camshafts allow you to adjust the powerband to suit your desires and control the personality of the motor in away no other part can when combined with an adjustable pulley.
you can do the same thing with a intake manifold, so aahh no again.
Searching through various websites since the 1.8T has been highly studied by a lot of tuners and was used in racing by Audi Sport in Europe and doing some math I estimate that with a 254 cam which seems to be the standard I can gain at least 15-20bhp and get the powerband extended.
and this is on what turbo, i bet 28rs or larger.
As for the cost issue they only cost about 500-600 dollars which is much less than many other mods and more effective than $400 intakes
Who pays $400 on an intake, nut i agree with you on the one, $200 plus on an intake is crazy.
and plus if you really want a fast ride you getta be cammed.
Agreed but you wont see major gains unless you got a big port head and all other supporting mods in the head listed above by denim.
That said I think I'm gonna put em in next month, tune em w/ the Vag-Com and let you guys know how it went
Limmiwinks only adds/subtracts fuel/timing over the entire rpm range so im not sure who you will accomplish that.
I beg to differ as an engineer. Many of you will claim that cams do not have a big impact on the performance of a turbocharged engine but you are dead wrong. Remember all engines operate exactly the same way so the enhancement that would occur on an NA motor would be even more pronounced with a turbo. I installed HKS 264 degree cams on my SR20 and the increase in power was over 20hp peak at a higher rpm than stockand the powerband grew larger by over 400rpm.
You are comparing two completly differnt heads. If i was to compare a normal small port 1.8t vs a b-series honda head the flow would laughable about how much more the b-series flows. Plus how were these tuned? plus a basic sr20 runs a t25 wich is still 40-50hp more than a ko4-2x. Once again apples and oranges.
As to the valvetrain issue, if you own the 225 motor the car comes with an upgraded valvetrain (This is one of theseemingly infinitereasons to buy a 225 over the180).
aahhh what?? The valvetrain is the same. The only head that is any differnt is the aeb (96-99 a4/passat) head which has a large port head compared to the rest that are small port aka suck at flowing.
Camshafts allow you to adjust the powerband to suit your desires and control the personality of the motor in away no other part can when combined with an adjustable pulley.
you can do the same thing with a intake manifold, so aahh no again.
Searching through various websites since the 1.8T has been highly studied by a lot of tuners and was used in racing by Audi Sport in Europe and doing some math I estimate that with a 254 cam which seems to be the standard I can gain at least 15-20bhp and get the powerband extended.
and this is on what turbo, i bet 28rs or larger.
As for the cost issue they only cost about 500-600 dollars which is much less than many other mods and more effective than $400 intakes
Who pays $400 on an intake, nut i agree with you on the one, $200 plus on an intake is crazy.
and plus if you really want a fast ride you getta be cammed.
Agreed but you wont see major gains unless you got a big port head and all other supporting mods in the head listed above by denim.
That said I think I'm gonna put em in next month, tune em w/ the Vag-Com and let you guys know how it went
Limmiwinks only adds/subtracts fuel/timing over the entire rpm range so im not sure who you will accomplish that.
I dont mean to sound well... mean but im just telling you that if your not ready to spend $2k in head work your cams will not make you happy and may harm ride quality. If you want more power and reliability just get a bigger turbo first.
