Hustler's build thread 2.0, the natural aspiration connection
08-29-2012, 11:21 AM
#101
Tour de Franzia
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How much power am I giving up by going with an RB exhaust over something fancy? ARTech can do something for me soon, but I just don't have the time.
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08-29-2012, 12:44 PM
#102
Cpt. Slow
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Why won't the turbo exhaust work for now? Is it just too loud? I wonder if you could have Abe weld up a cat. But instead of a cat it's a small resonator to cut down the noise without the power sacrifice of a real converter. Also, you could reuse your turbo exhaust on your DD turbo'd car once you get something more permanent for the track car.
Just a thought. Although, you might not have time for that either.
Just a thought. Although, you might not have time for that either.
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08-29-2012, 12:58 PM
#104
FWIW, we just installed one of the new Borla race exhausts with optional rear muffler. Very quiet and nice tone. It's reasonably light but a bit too expensive for most. They have a kit for every year 90-05. We'll add it to the website. but I'm grinding on Borla to maybe lower the SRP a bit to bring it more inline with the other exhausts on the market.
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08-29-2012, 01:24 PM
#105
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A turbo muffler without turbo or cat..... 97.9dB. It isn't too pleasant and there's a loss of low-end tq lol.
No time to have a muffler shop do a quick fab of 2.25" piping to a resonator in place of the muffler? Should stay under 94dB with a high flow cat or another res. Should only weigh around 13lbs as well.
No time to have a muffler shop do a quick fab of 2.25" piping to a resonator in place of the muffler? Should stay under 94dB with a high flow cat or another res. Should only weigh around 13lbs as well.
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08-29-2012, 01:41 PM
#106
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Sub'd for awesome small penor N/A build!
Not only do I personally know a guy who hydrolocked TWO engines in the same car, I was with him both times. Was a VERY low mounted behind bumper cone filter on a VR6 Jetta.
Or does the turbo catback have accommodation for a cat? Replace the "test pipe" with a resonated pipe?
Regarding water in the intake, I've heard extremely mixed views.
A number of s2ki.com forum members seem to have 'heard of a guy' who hydrolocked their engine. One member is sure that his CAI-equipped engine bogged and then blew after he splashed through a big puddle on the street. However, I've never encountered such horror stories anywhere else on the web, which makes me wonder if this hydrolock phenomenon is just an idiosyncrasy of this particular forum.
Another example: my friend once told me he was penalised during an intake design module of his motorsports engineering course for positioning the trial vehicle's air filter in an exposed position. So, edumacated people do not recommend it.
A number of s2ki.com forum members seem to have 'heard of a guy' who hydrolocked their engine. One member is sure that his CAI-equipped engine bogged and then blew after he splashed through a big puddle on the street. However, I've never encountered such horror stories anywhere else on the web, which makes me wonder if this hydrolock phenomenon is just an idiosyncrasy of this particular forum.
Another example: my friend once told me he was penalised during an intake design module of his motorsports engineering course for positioning the trial vehicle's air filter in an exposed position. So, edumacated people do not recommend it.
A turbo muffler without turbo or cat..... 97.9dB. It isn't too pleasant and there's a loss of low-end tq lol.
No time to have a muffler shop do a quick fab of 2.25" piping to a resonator in place of the muffler? Should stay under 94dB with a high flow cat or another res. Should only weigh around 13lbs as well.
No time to have a muffler shop do a quick fab of 2.25" piping to a resonator in place of the muffler? Should stay under 94dB with a high flow cat or another res. Should only weigh around 13lbs as well.
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08-29-2012, 02:04 PM
#107
I had an Springfield Dyno exhaust on that motor and the people at HHR said it was too loud at 117dB, but I call BS because the person doing it stood only 20 ft behind it. They told me to floor it in neutral and with the light weight of the motor it quickly shot all the way up and got very loud very quickly. It scared the person with the meter enough that they ducked away.
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08-29-2012, 04:38 PM
#109
I had an Springfield Dyno exhaust on that motor and the people at HHR said it was too loud at 117dB, but I call BS because the person doing it stood only 20 ft behind it. They told me to floor it in neutral and with the light weight of the motor it quickly shot all the way up and got very loud very quickly. It scared the person with the meter enough that they ducked away.
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08-29-2012, 06:57 PM
#110
Fwiw, I ran an rb header, no cat(straight pipe, mandrel bent), with a single 14" spiral flow resonator in place of my muffler for many years. Measured 92-93 db at every event. Sounded fantastic, not too loud in the cab, and cost me about 25$ from the local exhaust shop. I liked it so much that I keep three in my garage at all times, lol.
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08-29-2012, 07:28 PM
#111
Fwiw, I ran an rb header, no cat(straight pipe, mandrel bent), with a single 14" spiral flow resonator in place of my muffler for many years. Measured 92-93 db at every event. Sounded fantastic, not too loud in the cab, and cost me about 25$ from the local exhaust shop. I liked it so much that I keep three in my garage at all times, lol.
For reference, a bone stock 49 state NB1 is about 92db.
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08-29-2012, 09:00 PM
#113
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Fwiw, I ran an rb header, no cat(straight pipe, mandrel bent), with a single 14" spiral flow resonator in place of my muffler for many years. Measured 92-93 db at every event. Sounded fantastic, not too loud in the cab, and cost me about 25$ from the local exhaust shop. I liked it so much that I keep three in my garage at all times, lol.
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