Discussion
I apologise in advance - I've been on the Hoegaarden and now thinking about some long tube headers and maybe a new cam. Is this a bit much? http://videos.streetfire.net/video/06
, you kidding!?, just think how many old people and children you can scare! (unless you have to take your old folks around and kids in the car 
)Problem in the UK is emissions testing that will limit your cam choice. Unless you dont intend to get an MOT 
Look for around 0* overlap at 0.050 and definately think about cats.
Now the best way to get good power with a small cam is nice highflow heads. 6L guys can look at the L92 type heads with a huge intake valve.
Realistically this means a cam in the low 22x range.
Look for around 0* overlap at 0.050 and definately think about cats.
Now the best way to get good power with a small cam is nice highflow heads. 6L guys can look at the L92 type heads with a huge intake valve.
Realistically this means a cam in the low 22x range.
Its so hard to tell with a clip like that alone.
But if you stick with a cam known to pass Cali emissions laws, then you should be fine in the UK.
That cam could be a little too much. But without seeing how the exhaust system is made ( X-pipes or balance pipes change the sound a LOT compared to totally seperate pipes from each bank ) and knowing the LSA and lift on that cam, its hard to tell.
From sound clip alone, chances are it would struggle to pass idle emissions here.
But if you stick with a cam known to pass Cali emissions laws, then you should be fine in the UK.
That cam could be a little too much. But without seeing how the exhaust system is made ( X-pipes or balance pipes change the sound a LOT compared to totally seperate pipes from each bank ) and knowing the LSA and lift on that cam, its hard to tell.
From sound clip alone, chances are it would struggle to pass idle emissions here.
d cam upgrade you keep telling me to do Use a 'friendly' MoT place.
It's a re-post but this guy's (RIP) GTO sounded awesome.
http://www.youtube.com/watch?v=bQdhcU26tZ4
It's a re-post but this guy's (RIP) GTO sounded awesome.
http://www.youtube.com/watch?v=bQdhcU26tZ4
Magic919 said:
Use a 'friendly' MoT place.
It's a re-post but this guy's (RIP) GTO sounded awesome.
http://www.youtube.com/watch?v=bQdhcU26tZ4
a friendly MOT place that will turn a blind eye is possibly not the sort of place I'd want to get tested. Well, that wasnt the case when I was decatted....It's a re-post but this guy's (RIP) GTO sounded awesome.
http://www.youtube.com/watch?v=bQdhcU26tZ4
Magic919 said:
Use a 'friendly' MoT place.
Isn't it all electronic these days and held on the DVLA's computer?
As discussed in a previous thread, the cam might be a step too far as it's not cheap to fit and might fail the emissions test?
Stevie, bearing in mind I have the cat-back system already, is it worth changing the headers and cats or should the next thing be the heads?
wormus said:
Magic919 said:
Use a 'friendly' MoT place.
Isn't it all electronic these days and held on the DVLA's computer? As discussed in a previous thread, the cam might be a step too far as it's not cheap to fit and might fail the emissions test?
Stevie, bearing in mind I have the cat-back system already, is it worth changing the headers and cats or should the next thing be the heads?
That will result in a most definate YES. And headers are a lot easier to do than heads !!! It would be pointless fitting good heads, with very restrictive manifolds.
I have been thinking about getting more power from the LS1 I have but not going down the forced induction route.
I only have standard HSV headers on mine (04 VXR) with the wortec cat-back exhaust. If I was to get some free-er flowing heads and a more aggressive cam would I need headers as well? I am looking for 50+ gain on what I have now. If you add on headers as well as heads & cams it gets quite expensive.
I only have standard HSV headers on mine (04 VXR) with the wortec cat-back exhaust. If I was to get some free-er flowing heads and a more aggressive cam would I need headers as well? I am looking for 50+ gain on what I have now. If you add on headers as well as heads & cams it gets quite expensive.
stevieturbo said:
The headers and cats a friend removed from his Monaro.....well, take a look yourself and tell me if it looks restrictive on yours
That will result in a most definate YES. And headers are a lot easier to do than heads !!! It would be pointless fitting good heads, with very restrictive manifolds.
That will result in a most definate YES. And headers are a lot easier to do than heads !!! It would be pointless fitting good heads, with very restrictive manifolds.
So I assume you are saying headers and cats should be next? I am thinking of the Difilippo option: www.darrendifilippo.com.au/holden_sys.html will this fit my Wortec or will I need Wortec headers?
Will I get substantial gains bearing in mind mine is a VZ 354bhp CV8?
I might give Mark a call and ask him?
If you are getting stubbies then you will be ok, long tubes will be a relocation of cats and a bit of cutting to the current exhaust. Also will require relocation of O2 sensors - INSIST on extender cables and DO NOT be fobbed off with splicing the wires.
Also if told "they all do that" when you feel a massive knock/vibration when turning, insist the headers are looked at because they are fouling the steering rack.
Also if told "they all do that" when you feel a massive knock/vibration when turning, insist the headers are looked at because they are fouling the steering rack.
I you do some searching you can find a dyno of my old LS1 with full headers, intake, heads etc. Cam was only 220/224-114 but did 386rwhp on vixpy's dyno, which pretty well matches a VXR500 for bhp. Not bad for a naturally aspirated engine with a smaller displacement.
You can improve on that further. Id look at TFS 215cc heads and a 224/228-114 comp xer cam personally, you should break 400rwhp with that setup. You will want full exhaust/headers etc and stuff like a fast90/90 intake setup etc. It wont be cheap but if you do some/all of the work yourself should still be less than a supercharger.
The thing that stops the supercharged guys getting more power is the stock engines. Airflow sucks in comparison to an all out NA setup.
Of course add the 2 together and add some forged parts and the sky is the limit.
Id love to see more NA setups. There are a couple of guys who have had cams, but not really the whole hog with uprated intakes and cnc heads etc.
You can improve on that further. Id look at TFS 215cc heads and a 224/228-114 comp xer cam personally, you should break 400rwhp with that setup. You will want full exhaust/headers etc and stuff like a fast90/90 intake setup etc. It wont be cheap but if you do some/all of the work yourself should still be less than a supercharger.
The thing that stops the supercharged guys getting more power is the stock engines. Airflow sucks in comparison to an all out NA setup.
Of course add the 2 together and add some forged parts and the sky is the limit.
Id love to see more NA setups. There are a couple of guys who have had cams, but not really the whole hog with uprated intakes and cnc heads etc.
Richard with the standard heads (arent they ls6 heads) the cam would be a good starting point would it not? Do it in stages if needed? Obviously the stock intake would be a restriction but if done in stages surely it could be ok?
If so what cam profile would you says a good bet (make too etc) as I am sure I can stick one in the suitcase for the return from CA later this year
If so what cam profile would you says a good bet (make too etc) as I am sure I can stick one in the suitcase for the return from CA later this year
ringram said:
I you do some searching you can find a dyno of my old LS1 with full headers, intake, heads etc. Cam was only 220/224-114 but did 386rwhp on vixpy's dyno, which pretty well matches a VXR500 for bhp. Not bad for a naturally aspirated engine with a smaller displacement.
You can improve on that further. Id look at TFS 215cc heads and a 224/228-114 comp xer cam personally, you should break 400rwhp with that setup. You will want full exhaust/headers etc and stuff like a fast90/90 intake setup etc. It wont be cheap but if you do some/all of the work yourself should still be less than a supercharger.
The thing that stops the supercharged guys getting more power is the stock engines. Airflow sucks in comparison to an all out NA setup.
Of course add the 2 together and add some forged parts and the sky is the limit.
Id love to see more NA setups. There are a couple of guys who have had cams, but not really the whole hog with uprated intakes and cnc heads etc.
You can improve on that further. Id look at TFS 215cc heads and a 224/228-114 comp xer cam personally, you should break 400rwhp with that setup. You will want full exhaust/headers etc and stuff like a fast90/90 intake setup etc. It wont be cheap but if you do some/all of the work yourself should still be less than a supercharger.
The thing that stops the supercharged guys getting more power is the stock engines. Airflow sucks in comparison to an all out NA setup.
Of course add the 2 together and add some forged parts and the sky is the limit.
Id love to see more NA setups. There are a couple of guys who have had cams, but not really the whole hog with uprated intakes and cnc heads etc.
Trick cams are great, had one in Mental Betty`s drag engine, but they really don`t lend themselves to a gentle run down the road or as a daily driver when all you want to do is get home.
Dont forget drivetrain and fuel system limitations.
wormus said:
stevieturbo said:
The headers and cats a friend removed from his Monaro.....well, take a look yourself and tell me if it looks restrictive on yours
That will result in a most definate YES. And headers are a lot easier to do than heads !!! It would be pointless fitting good heads, with very restrictive manifolds.
That will result in a most definate YES. And headers are a lot easier to do than heads !!! It would be pointless fitting good heads, with very restrictive manifolds.
So I assume you are saying headers and cats should be next? I am thinking of the Difilippo option: www.darrendifilippo.com.au/holden_sys.html will this fit my Wortec or will I need Wortec headers?
Will I get substantial gains bearing in mind mine is a VZ 354bhp CV8?
I might give Mark a call and ask him?
As you are already blown all the headers will do is improve your torque curve, cos that`s all they did to mine.
Gassing Station | HSV & Monaro | Top of Page | What's New | My Stuff