Twincharged motor

Turbo and Supercharger discussion
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Twincharged motor

By poorman type-r
- Tue Aug 31, 2010 5:30 am #211373 Alright my friend brought up this topic earlier and I said I would post a forum on here to see what you guys thought. What do you think of a twincharger? If that's what its called. A supercharger and a turbo on a b18. Would it be worth it?
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By poorman type-r
- Tue Aug 31, 2010 2:00 pm #211423 Yeah I don't see how it can be tuned properly lol, also if you had to guess. How much money would you have to spend off you wanted to build a reliabe one from scratch?
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By teal_dx
- Tue Aug 31, 2010 2:02 pm #211424 I'd add the cost of a custom turbo kit + cost of a SC + figure some custom plumbing & piping and then set aside a good chunk of $ for tuning it all.

(I have no idea :lol: )
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By poorman type-r
- Tue Aug 31, 2010 2:04 pm #211425 Hahaha yeah my friend wants to attempt this build soon. So im trying to see the cost and if there is anything he should know in advance before attempting this build.
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By berg89
- Tue Aug 31, 2010 2:59 pm #211430 Most people i see or even read about fail at this attemt. Might as well do a turbo compound set up. :thumb:
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By poorman type-r
- Tue Aug 31, 2010 3:07 pm #211431 Ha yeah that's what I've been trying to tell him but he wants to be unique.

By AutoXCivic
- Tue Aug 31, 2010 6:27 pm #211462
poorman type-r wrote:Ha yeah that's what I've been trying to tell him but he wants to be unique.


It's not unique ... it's been done a few times already. And honestly unless you are racing and have a lot of time and money and are (or have) a brilliant tuner ... it's kind of pointless ... other than the "well shit, look at that" factor. Every set up I have seen has a bypass valve that opens so the super charger stops pushing air as the turbo starts. So if the end goal is 18 psi and the super charger pushes 10 psi, the valve starts opening as the turbo starts boosting putting less and less load on the supercharger. By the time the turbo is pushing that 10 psi the supercharger is no longer pushing anything into the motor and the turbo is doing all the work. Doesn't that sound like fun to try to get working properly.
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By ikon
- Wed Sep 01, 2010 1:19 am #211555
AutoXCivic wrote:
poorman type-r wrote:Ha yeah that's what I've been trying to tell him but he wants to be unique.


It's not unique ... it's been done a few times already. And honestly unless you are racing and have a lot of time and money and are (or have) a brilliant tuner ... it's kind of pointless ... other than the "well shit, look at that" factor. Every set up I have seen has a bypass valve that opens so the super charger stops pushing air as the turbo starts. So if the end goal is 18 psi and the super charger pushes 10 psi, the valve starts opening as the turbo starts boosting putting less and less load on the supercharger. By the time the turbo is pushing that 10 psi the supercharger is no longer pushing anything into the motor and the turbo is doing all the work. Doesn't that sound like fun to try to get working properly.


like he said the hardest part is making an actuator to control the wastegates for both..... its been done but again not worth it.
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By poorman type-r
- Wed Sep 01, 2010 1:22 am #211557 So with that set up you really wouldn't make an outrageous amount of horsepower? That's what he wants to do I think.

By AutoXCivic
- Wed Sep 01, 2010 3:06 am #211573 That type of setup is more about a smooth powerband than making tons of power, but with a properly sized turbo you can get a smooth powerband. The idea is that the supercharger makes up the power you don't have when you are out of boost. This makes sense for a road racing or autoX situation because you are using the entire RPM range to race. You could make big power, but the supercharger isn't really helping much (except lower in the RPM range).

In a drag race scenario this setup is kind of pointless because you only use the lower RPMs at launch (maybe) but for the most part you are using a very narrow powerband in the upper RPM range so there really isn't any need to try to optimize the power in the lower RPMs. If he's looking for big numbers he should just stick with a solid turbo build it will be cheaper, and easier.

By Adrian91
- Tue Sep 14, 2010 6:52 pm #213668 Ive seen this setup once before in my life. Never came across it again. I dont think it would be worth it in my opinion.

By Vegeta_man111
- Thu Nov 18, 2010 6:11 am #223426 why not have him do a sequential turbo setup if he wants that kind of bling factor. Check them out. Supras do it all the time, I figure if you get a t25 or something like it, then have it feeding force to the next turbo, say a gt35r then that should work. Alot of drag cars run this setup. google it if you dont know what it is. would be alot cheaper than a turbo setup and a SC setup since the most expensive part would be your tune and turbo mani.
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By poorman type-r
- Fri Nov 19, 2010 6:29 am #223585 That build thread makes me want to try it now. The torque curve is amazing and its pushing some nice power and the best part is, he says it can push out a lot more power can't wait to see it in the end. :thumb:
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