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Okay so i'm planning to turbocharge my NA6 in two years time - enough time to do all the turbo supporting stuf like brakes, diff, transmission etc... (and p plates) i would want to make the car as reliable as possible and in the future put down as much power as possible, would i be best off buying a nb8 engine and building (forge turbo etc) it out of the car off to the side for the next two years, or turboing the current engine.

currently i have thought a bit about it.

Advantages of nb8:
1. less off road time for the car (engine gets dropped in when built. obviously i would need to do the whole wiring loom.
2. potential for power (more torque)
3. reliability, some 1.8's came turbo'd so more reliable

Advantages of 1.6:

1. money (cheaper)
2. don't have to re wire whole car.

Anyways they are just the obvious advantages of each, what do you guys think?

B6 was the original turbo - Mazda 323 gtr.

NBb engine I assume you mean (variable timing) has the better sump with the crank girdle and better factory oil pump.

Absolutely do the engine out of the car either way. If you want big hp forged, super reliable etc, that's going to take a few weeks min to get built.

Also by the time your done an extra few hundred on a spare engine isn't going to change to budget much.


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angusis2fast4u wrote:Okay so i'm planning to turbocharge my NA6 in two years time - enough time to do all the turbo supporting stuf like brakes, diff, transmission etc... (and p plates) i would want to make the car as reliable as possible and in the future put down as much power as possible, would i be best off buying a nb8 engine and building (forge turbo etc) it out of the car off to the side for the next two years, or turboing the current engine.

currently i have thought a bit about it.

Advantages of nb8:
1. less off road time for the car (engine gets dropped in when built. obviously i would need to do the whole wiring loom.
Its not as hard as you think to put in a 1.8L especially seeing as you are going to use aftermarket management anyway.
2. potential for power (more torque)
It will spool the turbo a little bit earlier and make really big power easier but at 150-200rwkw the difference is minimal.
3. reliability, some 1.8's came turbo'd so more reliable
False, the factory turbo engines are for all intents and purposes identical to the n/a engines. The weak poitn in all B6 and BP engines is the rods and they all share the same part number, so on a stock engine power handling is identical regardless and any built engine can take way more power than you can possibly use.

Advantages of 1.6:

1. money (cheaper)
Maybe, maybe not. I guess a 1.8 engine itself will cost a few hundred bucks but thats all.
2. don't have to re wire whole car.
See above, with aftermarket management its really a non issue.

Anyways they are just the obvious advantages of each, what do you guys think?

What goals for the car. The easiest question to ask is, what will you do with it, and who do you want to keep up with in a straight line?

Dann

Read Charlie91's thread and learn

Or have a chat with Jason from MX5 Plus they maybe putting a hairdryer on their track car.

NitroDann wrote:

angusis2fast4u wrote:Okay so i'm planning to turbocharge my NA6 in two years time - enough time to do all the turbo supporting stuf like brakes, diff, transmission etc... (and p plates) i would want to make the car as reliable as possible and in the future put down as much power as possible, would i be best off buying a nb8 engine and building (forge turbo etc) it out of the car off to the side for the next two years, or turboing the current engine.

currently i have thought a bit about it.

Advantages of nb8:
1. less off road time for the car (engine gets dropped in when built. obviously i would need to do the whole wiring loom.
Its not as hard as you think to put in a 1.8L especially seeing as you are going to use aftermarket management anyway.
2. potential for power (more torque)
It will spool the turbo a little bit earlier and make really big power easier but at 150-200rwkw the difference is minimal.
3. reliability, some 1.8's came turbo'd so more reliable
False, the factory turbo engines are for all intents and purposes identical to the n/a engines. The weak poitn in all B6 and BP engines is the rods and they all share the same part number, so on a stock engine power handling is identical regardless and any built engine can take way more power than you can possibly use.

Advantages of 1.6:

1. money (cheaper)
Maybe, maybe not. I guess a 1.8 engine itself will cost a few hundred bucks but thats all.
2. don't have to re wire whole car.
See above, with aftermarket management its really a non issue.

Anyways they are just the obvious advantages of each, what do you guys think?

What goals for the car. The easiest question to ask is, what will you do with it, and who do you want to keep up with in a straight line?

Dann

Plan is for about 350rwkw-400rwkw

Are you serious?

Dann

Lol, That's going mega expensive to make reliable. And even then reliable with depend on your view.


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Plan is for about 150rwkw-200rwkw

i fixed it for you.

Don't get caught up chasing numbers!

angusis2fast4u wrote:
Plan is for about 350rwkw-400rwkw

Jesus

LS1

M1474 wrote:LS1

Definitely the route i wanted to go in the beginning, want to keep it street legal though so either engine swap something and lose a heap of reliability, or max out the engine again losing reliability.

There is no way in hell you could make 350kw streetable let alone legal. Even if you managed to get traction you are just going to break drive line parts.

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Keep the forum updated and post the dyno run, looking forward to seeing this build.

You could, I have built setups that are very streetable which could make near 350rwkw, and there are setups in the states that are capable of this and still drive okay.

You wouldnt use a 1.6 though youd use a VVT engine.

Hell pats 250rwkw NA6 is fast enough to scare the sh*t out of even 90% of modified turbo street guys but it drives fantastically, its very torquey and tractable.

For 300rwkw you would run an EFR6758 on a 1.9L VVT engine, and you will make good torque and it wont really be laggy. On the street this could be reliable diff and gearbox wise with SE diff and 6 speed, but you probably would want to go to an rx7 or z32 box.

Dann

how much money do you want to spend?

and are you going to do the work yourself?