superchargers (again)
superchargers (again)
Author
Discussion

anonymous-user

Original Poster:

76 months

Thursday 21st June 2007
quotequote all
Can anyone tell me the difference between the LSV supercharger and the one used by Monkfish? From what I've read one is about £3.5k and the other is £7.5k ?

o.versteer

3,338 posts

251 months

Thursday 21st June 2007
quotequote all
The units themselves might be different, but with those price differences stated above, one will include an intercooler and one won't.

crisisjez

9,209 posts

227 months

Thursday 21st June 2007
quotequote all
Deffo go for an intercooler, LS1`s need one anyway. The harrop sits on top of the engine , I think the LSV mounts to one side. Each have +- points but personally I prefer the Harrop arrangement for neatness.

Also it sounds like something out of Star Wars when its on song.

Go to youtube and do a search for Monaro, Tom Ford drives a VXR500 so you get an indication of what it sounds like.

wortec2

103 posts

249 months

Thursday 21st June 2007
quotequote all
The one installed by Monkfish is the most up to date Harrop supercharger, it is similar to the supercharger on the VXR500.

V8 EOL - Rich

2,782 posts

244 months

Thursday 21st June 2007
quotequote all
There is quite a big difference to the way they are installed.

The LSV looks quite like a turbo (but belt driven obviously) and is mounted where the air box usually is. The Wortec one replaces the inlet manifold and sits on top of the engine.

ringram

14,701 posts

270 months

Thursday 21st June 2007
quotequote all
.. aka positive displacement and centrifugal designs, with the pro's and con's each type brings.

anonymous-user

Original Poster:

76 months

Thursday 21st June 2007
quotequote all
I've just had the Wortec sport pac installed by Monkfish (£1700) which includes the cat-back exhaust, cold air filter and remap modification. If I want to upgrade to a Supercharger what's the most cost effective way of me doing this, i.e. how much extra will I need to realistically spend to get 500bhp and where should I go to get it done?

LathamJohnP

4,477 posts

306 months

Thursday 21st June 2007
quotequote all
ringram said:
.. aka positive displacement and centrifugal designs, with the pro's and con's each type brings.
Nice explanation here

crisisjez

9,209 posts

227 months

Thursday 21st June 2007
quotequote all
wormus said:
I've just had the Wortec sport pac installed by Monkfish (£1700) which includes the cat-back exhaust, cold air filter and remap modification. If I want to upgrade to a Supercharger what's the most cost effective way of me doing this, i.e. how much extra will I need to realistically spend to get 500bhp and where should I go to get it done?


I took a stock VXR LS2 to `Pinks with Purple Stripes` (colour changed) and for 5500 I ended up with a fire spitting FI 500 bhp beastie. Albeit a quiet polite one unless you give it some.
If yours is LS1 you`ll need and intercooler.
10/10 for the service as well.
And you`ll get the same from Rodger.



Edited by crisisjez on Thursday 21st June 13:31

V8 EOL - Rich

2,782 posts

244 months

Thursday 21st June 2007
quotequote all
LathamJohnP said:
Nice explanation here
You learn something new every day!

Now, is a turbos boost delivery like a positive or centrifugal blower? (lag aside) scratchchin My guess would be centrifugal.

LathamJohnP

4,477 posts

306 months

Thursday 21st June 2007
quotequote all
V8 EOL - Rich said:
Now, is a turbos boost delivery like a positive or centrifugal blower? (lag aside) scratchchin My guess would be centrifugal.
I think a turbo is just an exhaust-driven centrifugal supercharger. Better efficiency, worse throttle response and lag.

John

RobKarloff

312 posts

225 months

Thursday 21st June 2007
quotequote all
V8 EOL - Rich said:
LathamJohnP said:
Nice explanation here
You learn something new every day!

Now, is a turbos boost delivery like a positive or centrifugal blower? (lag aside) scratchchin My guess would be centrifugal.


You'd be correct. Their compressor wheel design are pretty similar, the difference is that the turbo takes it's drive from the exhaust and the supercharger takes it direct from the engine. The reason a turbocharger has a wastegate is to modulate the boost pressure resulting, for the reasons suggested in this article. However, you can't do this with the centrifugal superchargers because they're belt driven. The only way you could would be to incorporate some kind of gearbox or computer controlled clutch drive, which would be complex and expensive. Yes, the centrifugal chargers are more efficient in how they compress and move air into an engine, but that does not necessarily mean they are the best choice. As stated in the article, the PD units are more simple to install, provide more boost through the normal working rev range, thus giving more torque and more drivability on a street engine.

o.versteer

3,338 posts

251 months

Thursday 21st June 2007
quotequote all
LathamJohnP said:
ringram said:
.. aka positive displacement and centrifugal designs, with the pro's and con's each type brings.
Nice explanation here
clap

Excellent description that - I know what I want now!

LathamJohnP

4,477 posts

306 months

Thursday 21st June 2007
quotequote all
A handy chart:

Supercharger Comparison Chart

Lots of other good stuff on that site too.

John

o.versteer

3,338 posts

251 months

Thursday 21st June 2007
quotequote all
Fabulous stuff again! So, can anyone who knows what they're talking about then tell me whether a Whipple is a good bet for a non-IC install on a 5.7? Sounds like it according to the above guide, but it seems to be the accepted wisdom that the LS1 needs to be intercooled to work properly. Any thoughts?

crisisjez

9,209 posts

227 months

Thursday 21st June 2007
quotequote all
o.versteer said:
Fabulous stuff again! So, can anyone who knows what they're talking about then tell me whether a Whipple is a good bet for a non-IC install on a 5.7? Sounds like it according to the above guide, but it seems to be the accepted wisdom that the LS1 needs to be intercooled to work properly. Any thoughts?


Looking at the photo of a Whipple it looks much the same as a Harrop twin screw.
On a hot day you`ll wish you had fitted an intercooler even if it say`s you don`t have to.
Running LS2 @ 6psi non intercooled, and on some fuel (BP Ultimate for ex) the timing pull`s bad and it can even Knock.
Its now on my mod list.

VXR_Daz

1,830 posts

242 months

Thursday 21st June 2007
quotequote all
crisisjez said:
Running LS2 @ 6psi non intercooled, and on some fuel (BP Ultimate for ex) the timing pull`s bad and it can even Knock.


Unless it is an ABSOLUTE emergency I never put anything in other than Shell V-Power.

Interestingly when I had the SC fitted I was asked what fuel I had in the tank as it was crap, obviously I couldn't name and shame the fuel company but lets just say that its name appears in the quote above

anonymous-user

Original Poster:

76 months

Thursday 21st June 2007
quotequote all
VXR_Daz said:
crisisjez said:
Running LS2 @ 6psi non intercooled, and on some fuel (BP Ultimate for ex) the timing pull`s bad and it can even Knock.


Unless it is an ABSOLUTE emergency I never put anything in other than Shell V-Power.

Interestingly when I had the SC fitted I was asked what fuel I had in the tank as it was crap, obviously I couldn't name and shame the fuel company but lets just say that its name appears in the quote above


Do you buy your own fuel? - that stuff is too expensive for me bearing in mind I do about 1200 miles a month. Back to my original question - what is the most effective way for me to get 500bhp with my current set up, it's all very nice reading about different types of superchargers but I still don't really know what I should ask for and what I should pay?

Also, if mine is an 06 model (twin exhausts & vents in bonnet) is it an LS2 and if so will it need an intercooler?

Edited by anonymous-user on Thursday 21st June 18:36

Le Sarthe

462 posts

236 months

Thursday 21st June 2007
quotequote all
If your car is an 05 model year (as opposed to 05 registered)and a 6.0VXR then it is an LS2.

If it is anything else it is not all 5.7's ideally should have intercooler - one of essential differences between LS1 and LS2 is the cooling propoerties/abilities of teh 6.0Ltr.

crisisjez

9,209 posts

227 months

Thursday 21st June 2007
quotequote all
Best fuel IMHO is Tesco`s 99.

Wormus, the more power the better the quality of fuel required.
Normal 95 (premium unleaded) is fine for a standard Monaro.
97 is deffo required for a supercharged engine, but you will return more mpg. (well I did)
If you pop your bonnet and the engine has the letters LS2 on the plastic coil cover (Hard to miss) the thats what you got, otherwise its a LS1 engine.
LS2= 6.0
LS1= 5.7
My honest advice to you is if you are not sure what mods to go for don`t do anything.
All these mod`s are a lot of money so make sure YOU have all the facts before you spend your hard earned.

From EXPERIENCE I say YOU NEED AN INTERCOOLER regardless of engine or supercharger type, this will give you a stable, constant temp charge regardless of ambient conditions. And is more costly to install at a later date.

If I was starting out again i`d have 1= Road Response Pack
2= Ripshifter
3= Remap.
For less than 1300 pounds you`ll completely change the car.

Then spend the rest wisely over time.