Supercharger inlet manifold

[pork]

Hi, I'm currently putting in an engine from a micra into a mini, with added supercharger.

The tight space means that I will need to combine the charger and inlet mani into one unit

Never attempted this and wondering if there's any things I need to take into consideration, like plenum shape/size?

Obviously space is an issue, is there any reason why I can't just bolt the charger to my current inlet (starlet) ?

[matty2300]

It really depends on what you are trying to achieve, gains will be had from having an appropriatley sized plenum chamber - but if you are not going for maximum power then a charger bolted straight to the inlet (no intercooler or plenum) will work fine (a lot of kits for mini/triumph are like this)


example - i.ebayimg.com/00/s/MTA4MFgxNjAw/z/s60AAOxy-WxTA22K/$_35.JPG


For a smidge over a tenner this might be a smart purhase, its a good book! www.amazon.co.uk/Supercharged-Installation-Supercharger-Engineering-Performance/dp/0837601681

[pork]

I will be keeping it efi too,

So there's no problem bolting it directly to an intake mani?
Bit would benefit from some sort of plenum

[sonus]

The Corky Bell book teaches you to do all these evaluations/calculations. 7-8psi is usually max if you don't cool the intake charge.

[dodgerover]

Sept 29, 2015 11:25:09 GMT matty2300 said:

It really depends on what you are trying to achieve, gains will be had from having an appropriatley sized plenum chamber - but if you are not going for maximum power then a charger bolted straight to the inlet (no intercooler or plenum) will work fine (a lot of kits for mini/triumph are like this)


example -

That is just a thing of simple beauty, however at 3.5k I can't justify one to modify.

[chairchild]

quite common with minis to simply slap on an M45 straight to the intake anyway



Get it slapped on

[dodgerover]

chairchild is that for a modern mini with EFI or do they hang an SU on the end of that pipe?

[chairchild]

HIF44 is the usual beastie thrown onto the end of the loooong pipe. Massive suck-through system.

Loads of cons, but pros are... well, they WORK, and with very little effort.

[pork]

Hi, the engine will be a 1.3 micra engine with injection and m24 charger.

Is there any way of incorporating a charge cooler into the manufild

[chairchild]

not if you're going suck-through I'm afraid. It's the biggest downside to the setup

[sowen]

Oct 5, 2015 18:13:10 GMT pork said:

Hi, the engine will be a 1.3 micra engine with injection and m24 charger.

Is there any way of incorporating a charge cooler into the manufild

The supercharged Jaguar's have an integral chargecooler with the inlet manifold.

I recently bolted my spare Eaton M62 on my Rover 2ltr engine inlet manifold, throttle body mounted ahead of the supercharger intake. I had it geared to produce 10-15psi boost, and after about 3 minutes of idling I turned the engine off and removed the supercharger as the intake temps had gone too high for my liking. I didn't have any idle bypass system fitted, just the supercharger blowing into a rough plenum on the manifold.

My plans now are to remotely mount the supercharger before the throttle with a mechanical bypass system like the VW G40/60 engines and a chargecooler mounted by the inlet manifold and then try again.

[chairchild]

if you fit any form of charge cooling on a suck-through system, the fuel will condense on the cold surfaces, which results in a horrendous fuel mix.

Your temps were sky-high due to having the TB before the 'charger. Running way out of it's efficiency zones. Again, this is a massive compromise on a suck-through system, as it's the only place you COULD put the throttle.

[sowen]

In a suck-thru carb setup isn't the fuel mixture supposed to help cool the intake air going through the supercharger?

I only mounted the supercharger the way I did as I wanted to go for a quick blast to see what it was like then pull the intake system apart to build it properly. It suprised me how quick it heated up and we reckoned it had the beginnings of some detonation when revved.

[pork]

Space is the biggest issue with this build.

The injectors are in the way, and would help if the weeny there, so wanting to keep efi, someone else suggested single point injection.


Is this ok with a supercharger, ?

[pork]

Ive got a standalone ecu.

Would I have to put 2 injectors pre charger (after throttle) and run them bank-bank from ecu?

Or one large injector? (Idle problems)


I was originally using 330cc injectors in this engine before

What size would I need for single point,

It could I use one smaller injector and the swap over to a larger one on high boost/rpm?

[pork]

Anyone help?

[froggy]

If you've got a spare output on the ecu your simplest and most effective way to go is water injection . Spray into the charger case to keep temps down . Trigger based on inlet temp , boost and throttle position should keep consumption down

[pork]

Hi mate

My problem is I don't have room for the injectors on the manifold with the charger bolted to it (classic mini build with micra engine)

So was wondering about the pre charger single point ignition stuff.

Like, one large injector or 2 identical injectors

[froggy]

Most single point stuff ran 2 bar or less fuel pressure and in not sure how they cope with trying to get more flow by running higher pressure . In theory you could bolt one to the front of the charger but how well it gets distributed between cylinders is another matter .
Does seem like backing yourself into a corner is there no way to package it to get injectors into each port or better still turbo it with a blower off a 1.6-1.8 diesel

[mk2cossie]

Can you not utilise the inlet manifold with the fuel injectors underneath it instead of on top?

And any pics of the setup/space you have?