2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Half-Bridge + Stock turbo?

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Old Jan 13, 2024 | 09:10 PM
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Loose-Goose1255's Avatar
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From: Rockledge, florida
Half-Bridge + Stock turbo?

I'm currently building up my arctic silver S4. It is originally N/A but I'm rebuilding it with the stock S5 turbo and manifold. Now, I could only find 1 thread on this and it wasnt very helpful so I am wondering is this possible? I mostly want the sound from the bridge but I only want around 200-250 horse and am aware a bridge is very overkill for this. Thank you for any responses
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Old Jan 13, 2024 | 09:32 PM
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From: sb
You can make a stock ported engine sound awful just like an old bridge...conversely with modern engine control bridges don't have to sound like dogshit.
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Old Jan 13, 2024 | 09:40 PM
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From: Rockledge, florida
Originally Posted by dguy
You can make a stock ported engine sound awful just like an old bridge...conversely with modern engine control bridges don't have to sound like dogshit.
I like the sound, just me though, wanna enlighten me on how to get the desired "brap brap" in question?
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Old Jan 14, 2024 | 11:20 AM
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From: san diego
Call pineapple racing.

They’ll tell you to go with a streetport to get the overlap which will give you some brap brap, but still maintain low end drivability, and work with smaller turbos. They also sell the porting templates.

I thought the same as you ~10 years ago, except I was going to go with a big turbo for the bridgeport. I called pineapple racing and they talked me into a streetport. Ran on a stock turbo for a bit and have since been running on a panspeed hybrid turbo (similar to bnr stage 3), and it’s a fun peppy street machine.

In the end, it’s your car and your money, so do whatever you want. I just recommend building a system which will work together to give you the best outcome. Stock turbo will just be blowing hot air when combined with a bridge, nowhere near ideal. Possibly even a risk to blowing the motor with hot IAT’s…?

Last edited by DR_Knight; Jan 14, 2024 at 11:28 AM.
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Old Jan 14, 2024 | 12:40 PM
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From: https://www2.mazda.com/en/100th/
the overlap the bridge port adds makes it more sensitive to backpressure, and then the stock turbo has lots of backpressure, so its kind of a loose loose.
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