Supercharging a 3.5 ltr V8

[jbell]

mu-stu I know what you mean, I missed out on sum of
the 31 million too!

Tim D any more pics of the 109 ????? be good to see.

JEFF

[yella_rangie]

im going to try supercharging my 1981 2 door. i just have a 3.5 litre carby on gas. im goin to buy a jap import supercharger. cost me $350. plus i will do all my own piping etc

[DaveS3]

Supercharging a 3.5 rover V8 was more of a learning experience than a power upgrade,i new i could fit a larger motor but what would i have learn't?now i know what fuel flows and pressures get up to with forced induction,when boost comes on and when you're on vacuum.EFI is all new to me aswell and after having aftermarket engine management fitted i have come to appreciate how much work goes into a stock factory ecu,tuning takes a long time and repeated visits to get it right.it cost quite a bit more than expected but i have a pretty trick set up now,just have to get out and enjoy it now.

Mate, is it possible to get any more pictures of your setup, and your coil conversion?

I am contemplating putting a 3.5 EFi from a disco and fitting megasquirt in my Stage 1 V8. Also planning coils in 6 months or so. It would be nice to see how you've located your link brackets.

Dave

[GRIMACE]

im going to try supercharging my 1981 2 door. i just have a 3.5 litre carby on gas. im goin to buy a jap import supercharger. cost me $350. plus i will do all my own piping etc

this is exactly what i was considering, SC and small intercooler can be had for around $400 piping, electrics and switch (electric clutch activated supercharger) and custom mounts done properly will probably cost another $400 done. or if you booty fab it all like me prob only cost an extra $200.
How long the 3.5 last is entirely dependent on its current condition and your right foot

[yella_rangie]

well i think my engine is a bit tired anyways. so she will be due for a rebuild at some stage. only one way to find out. how r u thinking of doing it? let me know. i have a plan but im not sure if it will work pm me your email and i will tell u my idea

[GRIMACE]

just letting you guys now that i am trying to get the megasquirt and upgraded torque convertor sorted out and after thats done the cheap electronic supercharger is next

[ANT ROVER]

I have a 4.0L dico motor in my 87 rangie. It runs with a STA supercharger running a pogressive 9 PSI. It's definately got the go. It lacks a little down low but from 2500 RPM onwards, LOOKOUT! The biggest problem with the supercharger was fuel. The standard injectors just weren't enough, so larger capacity injectors went in. The second problem is heat. My supercharger is oil cooled so heat isn't to bad. I have seen an gas intercooler that ran off the A/C and had the air running into the inlet manifold at a constant 16 Degrees. Some one to talk to is...

POWERFLOW INJECTIONS AUSTRALIA
Ringwood 14 Pilgrim Crt 3134 (03) 9872 3655
Email info@powerflowinjections.com

They deal with STA and where very helpfull.

[Tim D]

mu-stu I know what you mean, I missed out on sum of
the 31 million too!

Tim D any more pics of the 109 ????? be good to see.

JEFF

These pics were from rover park on the 22nd and 23rd of january at the BOTC (battle of the codes)

[GRIMACE]

Purchased the supercharger and wolf3d v4 yesterday.

Once the wolf is in and sorted the supercharger will go in Its a dodgy cheap jap import (toyota SC14) supercharger that can handle upto 4L engines (so thats what i been told) I am only gonna runn low amounts of boost 6, 9 or 12 watever I feel is the highest safe point

[BIg StEvE]

Purchased the supercharger and wolf3d v4 yesterday.

Once the wolf is in and sorted the supercharger will go in Its a dodgy cheap jap import (toyota SC14) supercharger that can handle upto 4L engines (so thats what i been told) I am only gonna runn low amounts of boost 6, 9 or 12 watever I feel is the highest safe point

WoooHOOOO! You gotta keep us posted on this one dude!

[GRIMACE]

Purchased the supercharger and wolf3d v4 yesterday.

Once the wolf is in and sorted the supercharger will go in Its a dodgy cheap jap import (toyota SC14) supercharger that can handle upto 4L engines (so thats what i been told) I am only gonna runn low amounts of boost 6, 9 or 12 watever I feel is the highest safe point

WoooHOOOO! You gotta keep us posted on this one dude!

Wolf has boost control might set it to run 20p boost at WOT

[DaveS3]

mu-stu I know what you mean, I missed out on sum of
the 31 million too!

Tim D any more pics of the 109 ????? be good to see.

JEFF

These pics were from rover park on the 22nd and 23rd of january at the BOTC (battle of the codes)

That thing is F***ing awesome!

Love the shock mounts & extra cab.

Dave

[BIg StEvE]

Hey Tim D,

Those wheels your running! Who makes these and how much where they cos they look awesome! I've seen em on a few nice rigs now and i want i want i want!

thanks

steve

["CANADA"]

Hey Tim D,

Those wheels your running! Who makes these and how much where they cos they look awesome! I've seen em on a few nice rigs now and i want i want i want!

thanks

steve

The wheels look similar to the eastern wheel works

[DaveS3]

Hey Tim D,

Those wheels your running! Who makes these and how much where they cos they look awesome! I've seen em on a few nice rigs now and i want i want i want!

thanks

steve

there simex's

He asked about wheels.

The wheels look similar to the eastern wheel works ones.

Quite a few people run wheels made by this company as they are beefy and are hard to buckle.

Dave.

[BIg StEvE]

Hey Tim D,

Those wheels your running! Who makes these and how much where they cos they look awesome! I've seen em on a few nice rigs now and i want i want i want!

thanks

steve

there simex's

Yeah i was talking about the wheels not tyres!

[CRUSHU]

I have built a supercharged (small roots style) 400ci ford engine. My brother runs a 5.7 litre holden VN with a centrifical blower, making 625hp at the treads. These are my opinions on the subject:

Definatley go for a roots style blower, not a centrifical, unless you like to make lots of power, and high up the rev range.

centrificals make power high, and lots of it. they can easily be intercooled, with either air to air (very inefficient, and creates lag) or water to air, with either a cooler before the throttle body, or in a 3.9, with a core in the plenum.

roots make bulk power from idle. they run out of legs up top. this is especially relevant to the size blower you use, eg: toyota blower off a 4 cyl.

run a holden delco computer, it is very adaptable, easy to tune, and can do just about anything you ask of it, and can be repaired by anyone, with standard holden sensors, which are very cheap.

my brother and I have put a delco on a 351 clevo in a TD cortina, and in a supercharged 93 Ford LTD, it makes 343kw at the wheels.

to do it on the cheap, run bigger injectors, and if that is still not enough, you can program the ecu to run a 9th injector from eg: 5psi onwards.

STA superchargers are maybe only good for the 4x4 scene, as the tolerances in the unit are huge, they have to heat up the air more, as they have to spin harder, to make similar gains, compared to a quality 'charger. they may be ok in a 4'by but, as it will let the rocks thru, and not chew itself up!

[Tim D]

Hey Tim D,

Those wheels your running! Who makes these and how much where they cos they look awesome! I've seen em on a few nice rigs now and i want i want i want!

thanks

steve

If you had read the whole forum you would know that this is "MY BROTHERS"
car not mine , i'll ask what brand rims they are. He baut them with tires 2nd hand. here is a pic from the back.

[Leeps]

Hey Guys,
Hello from over in Southampton Uk. I have supercharged a 4.2. I too used a centrifugal charger for ease of install and space. I am not sure if they are available over your way, but I think CAPA used to be a supplier. Its a Rotrex Unit. They are very small (about the size of an alternator). I actually managed to fit mine in place of the aircon pump and use the same serpentine belt.

I have a whole site that I have detailed the build on if you are inerested or want any more information.

The motor itself is not geared up for off road use any more, its strictly tarmac these days. But I have had it on a dyno and it produces over 300 BHP and is not intercooled. If I can work out how to fit an intercooler in there I should be able to push it up past 330-340.

My site is www.progl.com

Cheers
Leep

[GRIMACE]

Hey Guys,
Hello from over in Southampton Uk. I have supercharged a 4.2. I too used a centrifugal charger for ease of install and space. I am not sure if they are available over your way, but I think CAPA used to be a supplier. Its a Rotrex Unit. They are very small (about the size of an alternator). I actually managed to fit mine in place of the aircon pump and use the same serpentine belt.

I have a whole site that I have detailed the build on if you are inerested or want any more information.

The motor itself is not geared up for off road use any more, its strictly tarmac these days. But I have had it on a dyno and it produces over 300 BHP and is not intercooled. If I can work out how to fit an intercooler in there I should be able to push it up past 330-340.

My site is www.progl.com

Cheers
Leep

Mate very interested to know what else you have done to the 4.2 to get over 300bhp comfortably
I only want very minimal power increase just wanna do it the easy way
I already have the intake and exhaust sorted.

also that link dont work

[Leeps]

Hey Anthony,

Essentially the engine is all standard with the exception of the Blower and the necessary bits for fueling and boost retard. Heads,crank etc. are all unchanged. To get the fueling/timing sorted, I have a custom ECU chip, this was expensive. It was blown specifically for the engine on aa rolling road session. Ignition and boost retard is handled by an MSD 6BTM ignition system.

Having a re-chipped ECU means that I do not need any 9th injector or rising rate fuel regulator etc. The standard Injectors are good for well over 300BHP.

Not sure why the link is not working, seems to work for me ok. I know that my site seems to have been up and down a bit lately though, have to have a chat with the hosters....

If you want to know anything specific, just let me know.

Cheers
Leep

[CRUSHU]

LEEP although you are not using a rising rate fuel reg, it would be beneficial, as you are loosing fuel pressure under boost, where you need it most. if you make 10lb's of boost, you are effectivly forcing that back up the injector, which will slow it down a little.

[DaveS3]

Any updates Anthony?

Got your wolf sorted yet?

Have been offered some kind of supercharger off a mazda import for $200. Brand new, so this has me thinking again

Dave.

[GRIMACE]

Any updates Anthony?

Got your wolf sorted yet?

Have been offered some kind of supercharger off a mazda import for $200. Brand new, so this has me thinking again

Dave.

Dude I got the SC14 supercharger and the wolf still sitting in the shed together..... calling my name louder and louder every day.
I learnt afew things about the SC14 superchargers and here wat i can tell you about them.

Theres a small roots type charger and they displace 1.4L of air per revolution. Roots type blowers dont produce more boost as the revs increase in actually affect they will run out of boost aftre a certain amount of rpm and actually can cause vacuum .
Dependent on how you set it all up will determine when you run out of boost.
I calculated that if i run the supercharger at three revolutions per each engine revolution (and basically switched off at idle) i will have very hi boost till about 3000rpm (high boost say 10psi dropping to about 6psi) then it will gradually drop and after 4500rpm I will be getting virtually no boost and the supercharger will be working just beyond its reccomended limit (12000rpm with 15000rpm bein the max)

I will be setting up the wolf to activate the supercharger at 1200rpm and deactivate it at 4600rpm.... I was considering running a boost valve to an air tank so the excess boost at idle could run into a large tank that can be used to air up when stationary and also maybe design a second boost valve that feed the air from the pressurised tank back to the engine after 4600rpm not sure how difficult this setup would be to design but i know for a fact that i can program the wolfs aux outputs to do this.

And if the pressurised tank and boost valve can flow enough back to the engine it would be like a NOS setup but with AIR instead of wild NOS

[GRIMACE]

I forgot to mention and ideal setup would be to run two SC14s at 2 revolution per engine rev and this would supply you with more boost and will run out of boost beyond 6000rpm. If i can get another SC14 for that cheap ($150 for my first one) I will buy it and get technical with the dual setup but until then the setup i mention earlier is how i am gonna go about it all.

and dont bother with and SC12 smaller charger of the 1.6L toyos as even at three revolutions per engin rev it will run out of boost at around 3400rpm

[GRIMACE]

Have been offered some kind of supercharger off a mazda import for $200. Brand new, so this has me thinking again

Sorry Dave but one thing that would be helpfull info is whether this charger your getting is a roots type or a centrifigal (hairdryer) style?

IMHO a centrifigal charger would be better for hi rev applications and a roots type better for offroad crawling applications as it supplies more boost at 2000rpm etc
Heres a little example (figures are all made up)
A roots type blower increases its feed rate at the same rate through the engine rev range.
So at 2000rpm it will feed 2800L of air / minute and at 4000rpm it will feed 5600L or air /minute (double the revs double the air feed)
Where as a Centrifigul (similar to a turbo) will increase its feed more and more as the revs increase eg
at 2000rpm it may feed only 1800L of air / minute but at 4000rpm it will feed 7200L of air / minute and at 8000rpm it could feed as much as 28800L of air per minute (thats alot of fawken air )

Hope that made any sort of sence

[DaveS3]

I'll find out what it is.

Where did you get your SC14 from. I already have a spare crank pully but am runinga york compressor above, so would either move that down low or mont the charger low.

Do you have enough room to mount 2?

Dave.

[GRIMACE]

I am cutting a whole in my bonnet and runing a small scope or a buldge above the charger probly gonna sit 5mm above bonnet height so the buldge will be about 15mm in total height.

to run two the best would be mirrored application bvut its not gonna be cheap to plumb em both up

[HSV Rangie]

Just do it

Its only $$$$$$

Michael.

[GRIMACE]

Just do it

Its only $$$$$$

Michael.

thats my theory only everytime i try to use it i get an error message..... goes sumthing like this

HAHAHAHA you poor bastard you have no fawken $$$.... keep dreamin poofter. Try again next month