Intercooler positioning if you're turboing a 2zz

[michaelb]

The standalone I have can do everything mate, not an issue there. I'm discussing it at the minute with my mate as to what we can do. He seems to think we can make do with an intercooler with some clever ducking.

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[michaelb]

If you have the contact details of anyone that has already done this, I'd appreciate them! Lol

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[michaelb]

And Lee Mabbet reckons the cams will be of benefit to the turbo

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[1979scotte]

And Lee Mabbet reckons the cams will be of benefit to the turbo

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That's interesting because they make separate cams for NA and FI wonder why they bother?

You can make do with an intercooler no doubt. It will most likely be the weak point of your setup if it doesn't make the power you expect. Again.

Have you thought about injectors yet? Going to need a lot more fuel with all that extra air.

Unique is difficult expensive and generally unreliable.
I should know I've got the only 3.0L V6 Rotrex Mk3 in the country and possibly the world.
I'm confident it will be worth it in the end but that Cayman S would have cost me less and been more reliable that's for sure.

Sometimes you've got to do what you've got to do.
Hope it turns out to be what you want.

[michaelb]

I have a really smart guy helping me here with the project, which gives me confidence! I know the money side will never add up but I'm doing it for me rather than to sell on. I love it when people stop and ask what type of car is it and say how much they like it!

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[michaelb]

I haven't thought about the injectors yet but agree they will need to be able to meet the needs! There will be quite a few bits a pieces which will need to be modified and changed but that's the fun of it! My mate reckons the gearbox should be ok but the clutch will definitely need upgrading. He is going to take a much closer look at everything over the next week or so. He knows what he's on about as he has an 800bhp supra he built and it's as reliable as the day is long!

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[Nvy]

The gearbox dies after 250lbf, mating 2zz to lets say garrett 2871 will do over 400 hp and at that point if you launch your car its done deal. Sort the gearbox and then think injectors and stuff. I saw a post of 500 hp 2zz on pump gas but it was in US and i tend to think that their numbers are quite a bit buffed for what is the real picture. Just something to think on.. some guy shredded his 3rd gear with just 260 hp.

[michaelb]

So the 2zz gearbox, which I'm using, can't take more than 250flb? I'm surprised at that tbh.

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[Nvy]

So the 2zz gearbox, which I'm using, can't take more than 250flb? I'm surprised at that tbh.

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Stock 2zz is rated at 130ish torque. Where is the surprise that it will break if you double it? This is not some diesel gearbox and you can find the numbers all over the internet Read on m1tch's build, he is going to use Juba/Jubu gears i dont remember the name that are rated at some more. Unless you want to go through boxes every other month what you can do is:

1. Keep the torque down and dont launch the car, 1979scotte i think suggested a supercharger that would keep the torque down.
2. Go to e153 box but your wallet will not thank you for that. Also earlier boxes are prone to syncro failing i think so ideally you would need a box from the latest models.

[Call the midlife!]

And Lee Mabbet reckons the cams will be of benefit to the turbo

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That's interesting because they make separate cams for NA and FI wonder why they bother?

You can make do with an intercooler no doubt. It will most likely be the weak point of your setup if it doesn't make the power you expect. Again.

Have you thought about injectors yet? Going to need a lot more fuel with all that extra air.

Unique is difficult expensive and generally unreliable.
I should know I've got the only 3.0L V6 Rotrex Mk3 in the country and possibly the world.
I'm confident it will be worth it in the end but that Cayman S would have cost me less and been more reliable that's for sure.

Sometimes you've got to do what you've got to do.
Hope it turns out to be what you want.

Crower do a separate cam for 1zz FI but not the 2zz, just the same stages as the NA versions.
I know because MWR have a sale on 2zz cams at the moment but not 1zz, typical...


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[michaelb]

Torque can also be controlled by the correct boost control strategy. I'm not aiming at stupid numbers for bhp, probably the 'magic' number of 300.

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[Nvy]

Torque can also be controlled by the correct boost control strategy. I'm not aiming at stupid numbers for bhp, probably the 'magic' number of 300.

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Go Rotrex with Mahle pistons and water to air, problem solved. The magic number in our light cars is comparable to some of the super cars, talking BHP per tonne.

[1979scotte]

Your mate is a very knowledgeable guy I am sure but every engine is different.
2jz and the getrag transmissions in Supras are amazingly strong.
C series transmissions are week we know they survive 250 ish ftlb over that it will depend on how you drive and how gently the torque ramps up.
2zz is better than the 1zz in this regard being very torque light in relation to the bhp.

[1979scotte]

TTE put theres under the gearbox

I honestly think TTE got it wrong [emoji23]

Tbh Dan for the modest 180 ish that the TTE kicks out it's fine it's SP that should have found a better solution. Don't know want my intake temps were on my SP but bet they were awful.

[dan944]

TTE put theres under the gearbox

I honestly think TTE got it wrong [emoji23]

Tbh Dan for the modest 180 ish that the TTE kicks out it's fine it's SP that should have found a better solution. Don't know want my intake temps were on my SP but bet they were awful.

Actually I completely agree.  I'll get the logger connected up next time I take the motor out and check how my temps are during these cooler days.

[james_ly]

Out of interest what is the 'fix' for the gearbox? Swapping to a stronger one?

[michaelb]

My guy says the gearbox should 100% without having to do anything

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[Nvy]

My guy says the gearbox should 100% without having to do anything

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Until we see you here asking for a new tranny Have a look its all over the internet these boxes are weak.

[michaelb]

The 2zz box too?

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[michaelb]

And you can control the torque with boost management

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[michaelb]

2zz box, which is the C60, should take 175flb easily

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[michaelb]

And I'm only looking at a max of 280-300hp. I want the engine etc to be reliable!

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[shnazzle]

280-300 at the flywheel with very sympathetic boost control and user input and the gearbox "should" be OK.

[1979scotte]

Out of interest what is the 'fix' for the gearbox? Swapping to a stronger one?

A good map is the most important thing.
Jubu 3rd and 4th gears have proven to be much stronger than the 265 ftlb they're rated for.
I have an S54 on my V6 which I am hoping will be good up to 300 ftlb. Bigger and heavier than the C6X boxes we have.
E153 is massive and hugely heavy but will cope with anything you're going to throw at it in MR2. Probably.

[michaelb]

Anybody got a good lead on a turbo? I've got a 2zz turbo manifold from turbokits with a T2 flange.

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