mx5cartalk.com

Finding a place for the toyota unit ( if you have A/C ) won't be easy
I used an Autorotor on my old mans NA6

we high mounted it above the Extractors
If i had a choise I would go turbo The install is easyer

Well I started the car today DAMN that superchager makes some Cool
noises it sounds SO GOOD

look bloody good too russell ...........

Hears a few pic off the the final thing


and from underneath

tomorrow is the big day I finished bleeding the Clutch tonight
Time for a run around the block

OK SO YOU WANT TO KNOW
The superchager is an Autorotor
The intercooler is a cheepy off Ebay ( like the one Astroboysoup had)
and I still have the A/C
The engine is brand new I rebuilt it with stock pistons,rod ECT
the manifold has been custom made in house and has been pinned and port matched. It has a set off regrind cams 255 deg with 8.5 mm lift using the STD HLA
Using a Autronic SMC V1.10 Computer and Toyota 4AGZE injector
Has a 6sp Box 1.8 torsen Mazda speed coil overs ( Ebay again)
Custom 4 into 1 tuned length Extractor and a 2 1/2\" SS system
on the test run tonight we made 5psi of boost at 3000rpm and a bit over 7psi at 5000 rpm
It is wet hear in canberra tonight but O MY GOD this thing is hauling arse
and it only has 17deg ignition in it under boost
will be on the Dyno next week to get some figures

Now please wipe the drule of the Keyborad

Hey Russell,

What type of heat shield is that on the extractors? I would be interested in something like that when I get some extractors on my MX.

BTW, thanks again to and Dave for fixing the alternator problem.

Also just picked up my MX on friday after the respray and bodykit. Looks awesome. Ended up with Ford Blaze Red as the main colour and the hard top is a gloss black buffed up it looks like a black mirror. Will come around after work sometime during the week.

Well havnt been able to do much over the weekend as the battery has died after sitting for so long I have to jump start her when ever i want to start it so no good for driving ( incase she stalls in traffic )
will have a new bat tomorrow then I can go and run the motor in
then get the Engineer over to have a look and hope he will let it pass

benoz wrote:So where did you get the intake manifold?
!

I got the manifold head plate machined by a freind then i made the rest of it my self would of cost a heap to get someone to make it for me

On the step by step guide. there are to many differant types of supercharger's out there and they all use a differant mounting system
I basicly found a chager and found somewhere to fit it Then made a few mounts after that just had to get the air into and out of the charger.
Finding a belt to drive the thing was also tricky ended up cutting down a 5PK belt to a 4PK belt

will have the car at the next wakefeild day so everyone can have a look

benoz wrote:Pity cos superchargers have far better power delivery!

I beg to differ on that score.
Turbos are not as rev dependant as a supercharger and are capable of making much more power.

Wòó

Benoz the toyota supercharger should be easy to install
as long as you don't have the A/C and have an Idea of how to make brackets ECT

I now have a got someone to upload a sound file
http://www.mx5-act.org/thedump/73E6BF9B73E1731C.WMV

There is no reson why you can't use the stock manifold. I just wanted the
extra power gains from a custom one Plus the extra Bling

the roadster wrote:

Woo wrote:

benoz wrote:Pity cos superchargers have far better power delivery!

I beg to differ on that score.
Turbos are not as rev dependant as a supercharger and are capable of making much more power.

Wòó

No,it's the other way around.
A turbo need to wait for pressure (ie rev) to build up to drive the turbine,whereas supercharged dríven by the crank-shaft boost-up from idle.
In regards to power (turbo or super-charge),depend how much boost you motor can withstand the pressure (usually by lots of $$).

However, the turbo doesn't put a mechanical load on the motor, unlike the SC.

Look at the dyno runs of a SC compared to a Turbo and the turbo advantage is clear.

The challenge is there.
If you can find a SC dyno slip that shows different, I may be convinced. IMHO turbos make the power earlier. Convince me otherwise with dyno plots.

Cheers
Wòó

BTW you'll need at least 220+ HP atw

the roadster wrote:No,it's the other way around.
A turbo need to wait for pressure (ie rev) to build up to drive the turbine,whereas supercharged dríven by the crank-shaft boost-up from idle.

It sounds like you need to drive a few of both before making such sweeping statements.

A well set up turbo, like the SP, in 6th gear at 110km/h on a freeway can go from vacuum to full boost in the blink of an eye. With a supercharger on the other hand, you would need to wait a fair bit longer while revs build up to get useful boost.

Its all about load for a turbo (ie you can have full boost at low revs) and lag is all but a thing of the past with modern low boost, high C/R setups. A belt dríven supercharger by its very nature of having a fixed relationship with the crank speed is always dependant upon revs.

You are all correct - sort of! The supercharger is working from idle, but has to overcome a relatively inefficient intake path and friction to make boost, so most supercharged engines won't make useful power instantly, unless they have large and efficient blowers. The turbo engine suffers from the need to have exhaust flowing at sufficient speed to turn the turbine fast enough to overcome friction and a generally tortuous intake path before making boost, although these days most of these inefficiencies have been overcome.

Both technologies have been around for a long time and I have seen a vintage racecar (1926) show 13lbs boost unloaded with a throttle blip (2 stage supercharged 1500cc). Same car could turn a standing 1/4 mile in 13secs on vintage crossplies and chain drive!! When it comes to outright horsepower top fuel dragsters use superchargers, not turbos.

I love my turbo SP, but I love the sound and feel of a supercharger too...
maybe I should put a supercharger in front of the turbo