Wayne's boosted 8 project

Grant Monkhouse · May 08, 2020, 02:33:01 PM

I think Clive mentioned earlier that most people use 2 x 850 in the primaries and 2 x 1680s in the secondaries which is 5060cc worth of Injector

At idle you use just the 850 which just inject into the primary runner which to me, I'd rather be injecting fuel across all 4 ports

Plus you are using this car for track aren't you so having lower engine speed idle isn't too big of a deal to help save mpgs lol

I would want to run 4 x 1000cc or In your case you will be able to run 6 x 1000cc as the excessive LIM runs 4 x Injectors, plus you can run another 2 in the centre iron

All depends on hp goals, what your ecu can do and what the person tuning it recommends

I'm going for the big ones because of methanol.

I'm yet to figure out what fuel pump to use.

Do you know what fuel pump you are using?

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Grant Monkhouse · May 08, 2020, 02:35:03 PM

There's a lot more people more knowledgeable and experienced than me, I'm just trying to pull the stuff I can remember out to guide you lol. Instead of wasting money on things, which I have done in the past

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Mr Spiller · May 08, 2020, 03:16:57 PM

Thanks again grant
Any info I donâ€™t know is always helping
I was told â€˜minimum 320 or 360 lph
I think I currently have a Walbro 240
Maybe

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re japi · May 08, 2020, 06:03:21 PM

Yeah, Grant is right. Running with methanol needs massive injectors. Basically you have to burn more methanol to get same result as gasoline. Like lots more! Same thing with fuel pump and coils, needs to be BIG!

With smaller injectors, things like idle is easier to control. With only 4 injectors, primarys and ofcourse secondary has to be massive.

Friend of mine is building semi PP with ethanol setup. Injectors will be 1300/2200 +one mega, I even dont know how big!

Problem here is to build large enough fuel system to support those...

However, methanol "runs cool" and reduses knocking. If you get it right, you will have awesome power...

Back to intake and exhaust. I usually say that you have to think rotary as an 2 stroke. They do hate if some thing is restricted. Exhaust or intake. So, best option usually is to" over engineer them". For example, all mods I have done, is done to being cabable to much bigger power. Like my exhaust, its 3,5" even dont it doesent need to be. Same thing with intake, it can do and flow much better than my power goal is...

Reason for all of this: rotarys are bastards and dont like to be done loosely

its much better do "over engineer" your components, than broke the whole thing in dyno just because your injectors are too small or exhaust wont flow enough...

Hope this helps, Im bored and drunk

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Mr Spiller · May 08, 2020, 06:23:10 PM

Quote from: re japi on May 08, 2020, 06:03:21 PM
Yeah, Grant is right. Running with methanol needs massive injectors. Basically you have to burn more methanol to get same result as gasoline. Like lots more! Same thing with fuel pump and coils, needs to be BIG!

With smaller injectors, things like idle is easier to control. With only 4 injectors, primarys and ofcourse secondary has to be massive.

Friend of mine is building semi PP with ethanol setup. Injectors will be 1300/2200 +one mega, I even dont know how big! Problem here is to build large enough fuel system to support those...

However, methanol "runs cool" and reduses knocking. If you get it right, you will have awesome power...

Back to intake and exhaust. I usually say that you have to think rotary as an 2 stroke. They do hate if some thing is restricted. Exhaust or intake. So, best option usually is to" over engineer them". For example, all mods I have done, is done to being cabable to much bigger power. Like my exhaust, its 3,5" even dont it doesent need to be. Same thing with intake, it can do and flow much better than my power goal is...

Reason for all of this: rotarys are bastards and dont like to be done loosely its much better do "over engineer" your components, than broke the whole thing in dyno just because your injectors are too small or exhaust wont flow enough...

Hope this helps, Im bored and drunk

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Yep
The reason I asked about methanol was that I have water meth cooling on my RX8
But not methanol fuelling

- I now understand

As for the exhaust , Iâ€™m all good
Hereâ€™s my downpipe

And the rest of 2 systems I had with everything I bought

Iâ€™m sure with a few bends and pipe we can make something adequate .
Good news LIM manifold and fuel rail have left the supplier today
Should see them sometime over the next month or so

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re japi · May 08, 2020, 06:38:06 PM

Yeah, that should be big enough

Methanol thing is tough. If you get it wrong...

But if you get it right, you should be doing some good power

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Mr Spiller · May 10, 2020, 12:22:20 PM

Delivery of the goods from across the pond is this coming this Thursday . Shipping is quicker now than it was before lockdown

. The TB adaptor from Russia is ordered but they are on strict look down I believe so could be a while .
Anyhow , in the meantime I will put the turbo and manifold back on - which means removing the steering column again ...........
And start figuring out the inter cooler size and inlet / outlet locations for the V mount .
Currently looking at a core size of 450x75x300 . Thereâ€™s 650 mm between the chassis front rails
Not sure if thatâ€™s big enough
Is there a way of working out size required by capacity of the intercooler ? Could possibly go 350 long if required

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Grant Monkhouse · May 10, 2020, 12:24:02 PM

Have you thought of removing part of the front "clip" or ever it is called to give you more room? The bit where the bonnet latches.

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Grant Monkhouse · May 10, 2020, 12:27:03 PM

Remove this piece, or part/most of it. Don't know how much different the 8 is compared to mx5

IT will give you much more room for activities

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Mr Spiller · May 10, 2020, 12:32:26 PM

Quote from: Grant Monkhouse on May 10, 2020, 12:27:03 PM
Remove this piece, or part/most of it. Don't know how much different the 8 is compared to mx5

IT will give you much more room for activities

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Oh that looks nice
Main problem is the fuse box on right hand side
Iâ€™ve moved the ecu box from the left which does open it up quite a bit more . Iâ€™ve got plenty of room for length , itâ€™s the width which is restricted slightly for an Outlet elbow where fuse box is

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Grant Monkhouse · May 10, 2020, 12:37:13 PM

Can you put the outlets in opposite corners?

You could just run a front mount? Take out the crash bar thing behind the front pump and put the intercooler there?

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Mr Spiller · May 10, 2020, 12:44:16 PM

Quote from: Grant Monkhouse on May 10, 2020, 12:37:13 PM
Can you put the outlets in opposite corners?

You could just run a front mount? Take out the crash bar thing behind the front pump and put the intercooler there?

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All the stock ones Iâ€™ve looked at in forge have the inlet / outlets equal whether itâ€™s side /top / bottom etc
Thatâ€™s why Iâ€™ll put it back together, I can see how many bends would be required . Ideally I think top entry on turbo side them middle exit on the other side .
Iâ€™m sure if I get a base lined up it could be easily made up somewhere .
Intercooler could go in front but from what Iâ€™ve read the V mounts is much better for cooling so Iâ€™ll see how far I get

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Grant Monkhouse · May 10, 2020, 02:29:12 PM

I think people mainly use V mounts on road cars due to space available, I honestly. Think a front mount will cool better it just mean longer piping in some cases etc

V mounts iv seen look like they stop clean airflow into the turbo and end up sucking hot air in off the coolers

V mounts are good though

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Grant Monkhouse · May 10, 2020, 02:37:12 PM

I like to look at it like this,

Front mount air has to go through intercooler no matter what due to the direction of the fins

V mount the air can go through both intercooler and radiator at same time, radiator probably run cooler as not getting intercooler air.

How ever the fins on the v mount intercooler aren't angled to help push air up, Imagine them being at 45 degrees to the floor

However they all work its just what works best for you in the space you have got lol

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Grant Monkhouse · May 10, 2020, 02:39:03 PM

Iv always thought that a v mount would work even better if the fins were at angles like this

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