Thread: Supercharging a Rover V8

Originally Posted by sclarke

Point taken, but i'm sure you can shed some light on the Manifold, Cam, Fuel system, Brakets, Pulleys, Belts ect....

Clarkie, supercharging a production engine that was never designed that way is a complex and frustrating business. Particularly so if you plan to use high boost, above 8-10 psi, and drive it on the street.

I suggest you buy a text book quality publication, Supercharged! Design, Testing and Installation of Supercharger Systems, by C. Bell, Bentley Publishers, 2001. Read, absorb, understand, and then decide if you want to proceed further.

Clarkie do you definatly want a supercharger or just enough boost to make your 500hp?

IMHO a well turbo'd Rover V8 would make 500hp with a lot less stress on the donk than a supercharged motor.

You would be able to intercool it much easier (compared to an eaton, same same with a powerdyne of any centrifugal)

The right sized turbo(s) would give good boost response from 2000rpm, upwards and with the right exhaust housings your parasitic loss compared to a supercharger would be bugger all.

it all depends what you want to do with the car i spose. If the 12 sec 1/4 is the main aim i would definatly turbo it. You'd be surprissed how streetable a turbo'd motor can be.

just my opinion tho

Luke

Why do i want a supercharger?
The **** factor of it wheezing and instant HP

As some others already have Superchargers i thought they could shed some light, but the answers are not that forth coming.

Does this forum only contain WebWheelers?

Send a PM to The 109, he has a s/charged 3.5 in his hybrid 109.

Justin


There you go a straight answer.I am with you Clarkie most people give you an answer you did,nt ask for

Justin

Originally Posted by sclarke

Why do i want a supercharger?
The **** factor of it wheezing and instant HP

As some others already have Superchargers i thought they could shed some light, but the answers are not that forth coming.

Does this forum only contain WebWheelers?

I can answer all the question you like...............But a roots style blower wont make the horsepower you want, so their isn't much point

Fuel systems? EFI? LPG? manifolds? Centrifugal? Roots? Screw? Intercooler? Aftercooler? Engine management? whats gonna sort your timing?...................

You need to answer some question first yourself before I can help, without having to delve into 4000 alternatives, If you wanted alternatives, I gave you some practical, economic ones to extract reliable horspower, with better fuel economy.........but you didn't like them

I actually agree and disagree with Brians advice, but his suggestion to buy the book is spot on, you need to learn about Volumetric efficiencies, compression ratios, charge rates, etc

More than I can be bothered typing, your more than welcome to drop in for a beer, have a look, a drive and I can take you around and look at another blown Rover motor, can even pick your mates diffs up

Originally Posted by Lucus

Clarkie do you definatly want a supercharger or just enough boost to make your 500hp?

IMHO a well turbo'd Rover V8 would make 500hp with a lot less stress on the donk than a supercharged motor.

You would be able to intercool it much easier (compared to an eaton, same same with a powerdyne of any centrifugal)

The right sized turbo(s) would give good boost response from 2000rpm, upwards and with the right exhaust housings your parasitic loss compared to a supercharger would be bugger all.

it all depends what you want to do with the car i spose. If the 12 sec 1/4 is the main aim i would definatly turbo it. You'd be surprissed how streetable a turbo'd motor can be.

just my opinion tho

Luke

More sound advice, but its not what you wanted to hear

Have a look at the RPI site in UK. They claim that supercharging such as Eaton type is not succesful in a Rover v8 due to poor fuel distribution in the injection manifold causing detonation and blown engines.

I have thought about it a bit, and I reckon the way to overcome this would be to use a carby manifold and machine the centre to mount the supercharger and then add bosses for injectors on the runners. The carby manifold would have pretty good distribution. It would cost a bit in machine work but is very doable. A Commodore Eaton should just bolt on to a suitable mount and a Commodore ECU will be able to be adapted.

With regards to turbos, JE offered a kit in the early eighties but gave up as they did not sell. AFAIR they sold two.

The other cheap possibility is a Toyota supercharger , but they are a bit small. They should give good torque but would have little top end as they are sized for an admittedly highly efficient 2 litre. Just a bracket on the side, and an aftermarket ECU would run it.

But as you have found, unless you buy a kit such as the Sprintex one, you will be doing a lot of experimental work.
John Davis had I think a Sprintex on his Kit thing( Overlander?), so Bruce will know of the pitfalls.
Regards Philip A

Originally Posted by rovercare

More sound advice, but its not what you wanted to hear

No its what i wanted to hear.

But i would like to know what others have done and the Pro's and Cons.
What has been done to yours??
What blower? What fuel system are you running? Where did you get the manifold from?

I have a book on Turbo's and Blowers From the days when i used to play with Turbo Volvo's