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Interesting Info here- http://911chips.com/dyno.html

Now twist that how you may!!!!!
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Old 05-01-2007, 05:39 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #81 (permalink)
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Quote:
Originally posted by mb911
Interesting Info here- http://911chips.com/dyno.html

Now twist that how you may!!!!!
So what's your point and how does that relate to SSI's netting 17-22 HP? I didn't read all of the text, but those all appear to be 3.2 Carrera dynos with various exhaust configurations with an aftermarket chip. Last I checked an SC was 3.0 liters and didn't have a chip like the 3.2. And we can build monster power...without SSI. So does that mean SSI's are crap? No? But that's not what we are debating. Stay on topic...first rule of debate.


Drew, I haven't compared the S2000 dyno charts, but I would guess that Honda retuned the S2000 to increase lower end torque since S2000 owners didn't like the peaky power (maybe they should learn to shift and keep the revs up). I would think that the dyno charts for the engines (new and old) do quantify the change.

Once again, no one is disputing that the SSI's or early headers provide a gain. I think I posted this same thought three or four times within this thread. Once again, it is the "inflated numbers" that is being questioned.
Old 05-01-2007, 06:02 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #82 (permalink)
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I chose to document any change in my stock 1979 SC from SSI install two ways. I used a Gtech and I did a dyno run. I did a run before and after test using the Gtech, as I was more interested in improvement in real world application. Using a GtechPro and being careful to run tests with conditions as similar as possible, I recorded a 0.4 second improvement in 0-60 times in SSI over the stock system.

After improvement was observed using the Gtech, I then had two dyno runs conducted with the SSI's installed. One of those two runs is attached. I'm comfortable with the results as documented by two independent types of tests. I'm posting my results with no intent to convince anyone; and I have no financial interest in SSI. I'll let the results stand on their own.




For anyone interested, here's IA's website.

http://www.imagineauto.com/index3.htm
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Last edited by autobonrun; 05-01-2007 at 07:55 PM..
Old 05-01-2007, 07:52 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #83 (permalink)
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well, nice debate but actually my question was ssi v. header, not ssi or header v. stock exhaust. I *know* that either header or ssi on a 3.0L will give me more hp. Whether it is 10 or 20 isn't that big a deal...I know that other people in my class are running them, so you keep up with the joneses. I was just curious if you leave a couple hp on the table by retaining heating capabilities.
Old 05-01-2007, 08:05 PM
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Quote:
Originally posted by nostatic
well, nice debate but actually my question was ssi v. header, not ssi or header v. stock exhaust. I *know* that either header or ssi on a 3.0L will give me more hp. Whether it is 10 or 20 isn't that big a deal...I know that other people in my class are running them, so you keep up with the joneses. I was just curious if you leave a couple hp on the table by retaining heating capabilities.
You're right, your question was different.

In the words of Gilda Radner "Never mind".
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Old 05-01-2007, 08:06 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #85 (permalink)
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Good dyno run, but why is weight listed at 3000 lbs? 78 SCs are more like 2500 lbs wet, maybe 2650 with full tank of gas and spare tire and jack still in the car. 350 lb driver?
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Old 05-02-2007, 05:15 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #86 (permalink)
 
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Quote:
Originally posted by 2002M3Drew
Good dyno run, but why is weight listed at 3000 lbs? 78 SCs are more like 2500 lbs wet, maybe 2650 with full tank of gas and spare tire and jack still in the car. 350 lb driver?
I had my 79SC weighed on calibrated truck scales prior to the Gtech runs. It came in at 2820 lbs. Add the weight of the dyno operator and that gets it close to the 3000lb figure. Your 2500 lb figure sounds very light for a stock SC with A/C, power windows, etc. etc. I wish I was around that weight.
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Old 05-02-2007, 10:12 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #87 (permalink)
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I'll play. My 82 SC went to the dyno (dynojet 248) about 3 weeks ago to get classed for racing in NASA. The engine is stock and I'm running stock exchangers with a cat bypass and a dansk muffler. 171 HP at the wheels and 176 torque. I am going to move to headers or ssi shortly. I will post before and after gains when I do (on the same day if the install goes okay )

Edit: Or, if the gains are minimal I won't post the results and I'll sell the dang headers or ssi's in the for sale forum
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Last edited by sfoster13; 05-02-2007 at 11:02 AM..
Old 05-02-2007, 11:00 AM
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Quote:
Originally posted by autobonrun
I had my 79SC weighed on calibrated truck scales prior to the Gtech runs. It came in at 2820 lbs. Add the weight of the dyno operator and that gets it close to the 3000lb figure. Your 2500 lb figure sounds very light for a stock SC with A/C, power windows, etc. etc. I wish I was around that weight.
My '83 (heaviest) has sunroof, original bumpers, factory sport seats, OEM Carrera Tail (heavy), but the a/c was pulled (most of the components), and the battery is lighter than stock. 2595 lbs withough driver, and approx 1/4 tank fuel.

Truck scales are often inaccurate for smaller weights like passenger cars. Your '78 even with A/C should be around 2650-2700.
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Old 05-02-2007, 07:58 PM
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Not to bring back bad memories, but has anyone done anymore actual dyno comparisons in the last 10 months?
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Old 03-02-2008, 12:26 PM
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its 2018. Where are the results people?
Old 12-01-2018, 08:35 AM
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Reminds me of this story.

How many Pelicans does it take to change a light bulb?

1 to change the light bulb and to post that the light bulb has been changed
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2 industry professionals to inform the group that the proper term is "lamp"
15 know-it-alls who claim they were in the industry, and that "light bulb" is perfectly correct
19 to post that this forum is not about light bulbs and to please take this discussion to a lightbulb forum
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36 to debate which method of changing light bulbs is superior, where to buy the best light bulbs, what brand of light bulbs work best for this technique and what brands are faulty
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1 conspiracy theorist to proclaim that light bulbs are really a Enviro-wacko tactic.
1 forum lurker to respond to the original post 6 months from now and start it all over again.
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Old 12-01-2018, 09:40 AM
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Ha, Ha, Ha! Too funny and too true!
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Old 12-01-2018, 09:53 AM
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just use RarlyL8 headers and a M&K and your done, easy
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Last edited by James Brown; 12-01-2018 at 10:50 AM..
Old 12-01-2018, 10:34 AM
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Quote:
Originally Posted by Clark Griswold View Post
its 2018. Where are the results people?


it's not like anyone is interested in doing before and after dyno's with SSI's with the cost of dyno time. then to pony up for dynoing 2x? read bruce Anderson's book, or put a set of SSI's on your car and see what your butt dyno says.

SSI's are in fact headers if not already aware. when building my spec911 that had SSI's in place from it's previous usage as a street & track car I looked at what a set of headers cost and simply ended up cutting the heater boxes off the SSI's and BOOM! stainless headers. today that might not be the route to go with the original recipe SSI's NLA and prices having increased for them used.
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Old 12-01-2018, 11:02 AM
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Quote:
Originally Posted by James Brown View Post
just use RarlyL8 headers and a M&K and your done, easy
Agree with this. I would wager the build quality is as good as, if not better than, the original SSI. And RarlyL8 has heater boxes you can add to the headers.
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Old 12-01-2018, 12:29 PM
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Q: Speculative question, I have a 2.8 that dynoed w 280 and it has headers. So therefore no heat. Heat would be nice. If I switch to SSI’s how much of a HP drop, if any, would I likely see? This is not a race car so I don’t care if slight drop in power vs improved comfort in cool weather.
Old 12-01-2018, 12:58 PM
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Appreciate the props!

Quote:
Q: Speculative question, I have a 2.8 that dynoed w 280 and it has headers. So therefore no heat. Heat would be nice. If I switch to SSI’s how much of a HP drop, if any, would I likely see? This is not a race car so I don’t care if slight drop in power vs improved comfort in cool weather.

280chp I presume. Header size needs to match the engine. What size/length are the current headers? Equal length? F1 or flat collectors? Exhaust port size, cams, and induction (carbs?) all factor in. Assuming exhaust ports smaller than 38mm and carbs the SSI 1.5"OD is a good match.
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Old 12-01-2018, 03:35 PM
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Quote:
Originally Posted by RarlyL8 View Post
Appreciate the props!




280chp I presume. Header size needs to match the engine. What size/length are the current headers? Equal length? F1 or flat collectors? Exhaust port size, cams, and induction (carbs?) all factor in. Assuming exhaust ports smaller than 38mm and carbs the SSI 1.5"OD is a good match.
Engine built by Mittelmotor in Germany. I would have to did up my paperwork but it is 2.8 MFI Twin Plug and I think the headers are some equal length jobs built by some company also out of Europe. Donít remember. The rest would be a guess for me. It was more of a general question as I donít know specifics nor care much about them. The car is very fast and lots of fun. Just wouldnít mind having some heat, but might not be worth the effort. Thanks
Old 12-01-2018, 04:33 PM
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Quote:
Originally Posted by juanbenae View Post
it's not like anyone is interested in doing before and after dyno's with SSI's with the cost of dyno time. then to pony up for dynoing 2x? read bruce Anderson's book, or put a set of SSI's on your car and see what your butt dyno says.

SSI's are in fact headers if not already aware. when building my spec911 that had SSI's in place from it's previous usage as a street & track car I looked at what a set of headers cost and simply ended up cutting the heater boxes off the SSI's and BOOM! stainless headers. today that might not be the route to go with the original recipe SSI's NLA and prices having increased for them used.
I am aware. I got myself some SSI and Dansk sport for xmas. All the hype has me excited. I expect a let down. I have read too much.
Old 12-01-2018, 08:34 PM
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