LS1 Turbo - only boosting from one head?
08-22-2008, 10:39 PM
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LS1 Turbo - only boosting from one head? Anybody has built a turbo kit for an ls1 that only have one of the manifolds building boost? I searched but found nothing talking about this subject. My car is a hybrid and I dont want to be boosting using both sides because theres not enough room on the drive side.
It's an LS1 Motor and I only want to run 5 to 8 pounds.
Any help is apreciated. If you know of a similar project being done, let me know.
It's an LS1 Motor and I only want to run 5 to 8 pounds.
Any help is apreciated. If you know of a similar project being done, let me know.
Last edited by jfman; 08-22-2008 at 11:00 PM.
08-22-2008, 11:22 PM
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Tune should be the same as a twin turbo or a conventinal single turbo.
With this setup, the boost goes to both heads just like a conventional setup. The pressurised air is fed to the intake manifold and both heads receive the exact same air. The only difference is that only one head is spooling the turbo. The exhaust side of the other head has a header just like an NA car.
Since were getting more techincal let me explain what I am searching for. The thing I am concerned with here is that the flow coming out of the heads may not be balanced (the driver side does not have to spool the turbo so it flows better) So I am trying to get some info about this concern of mine.
With this setup, the boost goes to both heads just like a conventional setup. The pressurised air is fed to the intake manifold and both heads receive the exact same air. The only difference is that only one head is spooling the turbo. The exhaust side of the other head has a header just like an NA car.
Since were getting more techincal let me explain what I am searching for. The thing I am concerned with here is that the flow coming out of the heads may not be balanced (the driver side does not have to spool the turbo so it flows better) So I am trying to get some info about this concern of mine.
08-22-2008, 11:47 PM
#6
FormerVendor
Driving a turbo with half the engine is really not something you want to do.
1. - will be lazy as hell
2. - both heads will not be recieving the exact same amount of air as one will have 20psi backpressure and the other will have zero.
If you're going to turbocharge this car, do it properly. It may be difficult to route the plumbing on the drivers side but as far as fabrication is concerned -nothing- is impossible.
1. - will be lazy as hell
2. - both heads will not be recieving the exact same amount of air as one will have 20psi backpressure and the other will have zero.
If you're going to turbocharge this car, do it properly. It may be difficult to route the plumbing on the drivers side but as far as fabrication is concerned -nothing- is impossible.
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Im a little derrrrrr...... on this sorry bro
08-23-2008, 09:29 AM
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Even with the intake pressure being the same for both banks, the actual airflow is going to be different for both sides due to drive pressure. Because of that, you'll be producing unequal power from both sides, and I'm not really sure that you could get the tune right, but I don't really know anything about that.
At best, you're looking for it to be a bitch to tune due to unequal airflow in each bank that is not going to be measureable whether you are using a MAF or going SD. You're also looking at terrible lag. The only way to solve that problem is going to be to use a tiny turbo, which is going to make reaching any reasonable power goal very difficult. Look at the STS kits, even getting exhaust from both sides of the engine, some people are complaining about lag on F-Body systems. You'll really need a similar size turbo to their base kit to boost an LS1, so think about how bad the lag is going to be.
At worst, you're talking about NOT being able to tune it to run properly, and/or the unequal power having adverse affects on your bottom end, causing things like spun bearing and odd effects on you crank. A spun bearing is especially likely, since you will be shift the oil wedge that your crankshaft rides on in the bearings on every revolution.
The only way I can see to maybe pull it off would be an unequal camshaft, lifting differently on each side, or a different camshaft on each side, but I think the only people with enough R&D money to pull that off is GM. Of course both of these would be extremely difficult on an LS1 (I hate to say anything is impossible).
Do it right, fab up a big single turbo or TT setup. It may not seem like it, but it'll cost about the same, too, when it's all said and done, so there's really no reason to not do it that way.
The 302 you saw was probably a big single with a crossover pipe.
At best, you're looking for it to be a bitch to tune due to unequal airflow in each bank that is not going to be measureable whether you are using a MAF or going SD. You're also looking at terrible lag. The only way to solve that problem is going to be to use a tiny turbo, which is going to make reaching any reasonable power goal very difficult. Look at the STS kits, even getting exhaust from both sides of the engine, some people are complaining about lag on F-Body systems. You'll really need a similar size turbo to their base kit to boost an LS1, so think about how bad the lag is going to be.
At worst, you're talking about NOT being able to tune it to run properly, and/or the unequal power having adverse affects on your bottom end, causing things like spun bearing and odd effects on you crank. A spun bearing is especially likely, since you will be shift the oil wedge that your crankshaft rides on in the bearings on every revolution.
The only way I can see to maybe pull it off would be an unequal camshaft, lifting differently on each side, or a different camshaft on each side, but I think the only people with enough R&D money to pull that off is GM. Of course both of these would be extremely difficult on an LS1 (I hate to say anything is impossible).
Do it right, fab up a big single turbo or TT setup. It may not seem like it, but it'll cost about the same, too, when it's all said and done, so there's really no reason to not do it that way.
The 302 you saw was probably a big single with a crossover pipe.
Last edited by T A WS6 M6; 08-23-2008 at 09:37 AM. Reason: typo
