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Forced Induction All questions and problems regarding Superchargers, Turbos, NOS, ZEX, intercoolers, water injection, etc.

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Old 08-29-2003, 01:19 PM   #11
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Quote:
Originally Posted by TrueWildMan
Okay, I feel really ignorant here, but how do you port the turbo into the SC? Doesn't the SC push air INTO the heads, and the turbo pull air FROM the heads? If you then port the turbo back into the supercharger, you create a circle, not to mention hot air going into the supercharger. Sounds impossible to do.
The Turbo does pull FROM the heads, but only to spool the turbo. It uses exhaust gasses to spin up in order to compress incoming fresh air and send it back to the intake. Imagine it like a fan....the exhaust gasses are blowing only on the outer edge of the blades, just to spin it. The cool air from the outside is coming off the center.

So BOTH force air into the intake, but the Turbo uses exhaust gasses for the same purpose as the belt on a SC.
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Old 08-30-2003, 01:46 AM   #12
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A turbo is like a fan connected to another fan. It works off the wasted energy of the motor pushing the used exhaust gases out of the heads. The gases spin one fan, which is connected to another one that pulls in fresh air and sends it to the engine. Google the topic, I am sure there are plenty of websites devoted to the topic.
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Old 08-31-2003, 02:31 PM   #13
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Wouldn't putting a turbo on a N/A 3800 work better then gutting an */C though?
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Old 08-31-2003, 03:20 PM   #14
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Quote:
Originally Posted by BonneMeMN
Wouldn't putting a turbo on a N/A 3800 work better then gutting an */C though?
sounds easier to me
plus, maybe there would be a kit made for our cars
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Old 08-31-2003, 10:22 PM   #15
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That would be nice, prob a lil expensive and involve welding but nice...
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Old 09-02-2003, 04:16 AM   #16
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I have a builder working on a kit but i am sure the Fiero crowd has already figured out a good system for the do it yourselfer.

I would find a good shop and just get it done until it has been done and tested.

Ty
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Old 09-02-2003, 10:41 PM   #17
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Quote:
Wouldn't putting a turbo on a N/A 3800 work better then gutting an */C though?
But the L67 is strengthened and runs lower compression so it is built for boost. The N/A 3800 is not built for boost and has higher compression, so you would have to lower compression or run less boost and then it still wouldn't be as strong as a L67. So the smart way to do it is take and L67 and put the top of the N/A 3800 on it and run the turbo through that.
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Old 09-02-2003, 11:12 PM   #18
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You are right compression is an issue but the final cost of swapping in a new engine can be very costly considering using a series 1 sc block can be done with less cost. Your point is a good one though and if you wanted the biggest power return in the end a series 2 l67 has more options or internals. The most reasonable build for up to 400hp would be a series 1 sc engine. If you want 6-700 hp then a series 2 can handle it with less work. I have yet to see 700hp out of a series 2 3.8l but I am sure one day we will see at least 800 with a Turbo and some NOS.

It really depends on the final goal. Very good point dbta.

Ty
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Old 09-02-2003, 11:22 PM   #19
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I think if you want silly fast performance, you'd be replacing everything anyways, but for just a normal hookup, i think you'd get more out of a turbo with an N/A then an */C. I think for just a slightly modded engine a N/A with a turbo would be more benefitial then an */C with the */C disabled and a turbo thru it...

Just my .02c
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Old 09-02-2003, 11:37 PM   #20
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It all depends on what you're after. If it'* low-end, go with the SC. If you want high end and higher boost levels (and your car can take it) go Turbo. The advantage with gutting the SC is that it'* a bullet-proof upper intake with the rotors removed. I'd block off or bypass the coolant passage though. You have the advantage of the internals that can take it now.

Find an SSEi with a tired SC, and turbo it.

I still like the idea of a 3000 rpm bypass for a sc, then have the turbo kick in. Best of both worlds.
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