Report on Fabspeed 993 Exhaust System
02-11-2014 | 04:31 PM
#1
Thread Starter
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Joined: May 2001
Posts: 9,632
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From: Solana Beach, CA
Report on Fabspeed 993 Exhaust System
Report on Fabspeed 993 Exhaust System
Went up on the dyno last Friday, the 7th of February, 2014. OMG….on the 3rd of 3 dyno runs, my 1997 993 put out 262 HP to the rear wheels and 258 and 259 on the first 2 pulls. The weather was cool, perfect for making HP, with the oil warmed up to to 185 degrees F. The engine is bone stock, no performance chip, and has never been apart, has 82,000 miles, and on the track since 2001. On a recent leak down, here is what we discovered:
1: 6%
2. 2%
3. 4%
4. 5%
5. 4%
6. 3%
Exhaust is all Fabspeed, X pipe, cat bypass pipes and an earlier iteration of Fabspeed Maxflows. Note, prior to the latest dyno run, the X pipe was sent to Fabspeed for updating. I believe they modified two of the flanges, not completely clear on this, but the cost was moderate and the resulting dyno results impressive.
The latest dyno 262 HP sheet is enclosed along with a previous sheet documenting 252.4 HP. The difference? In the 252.4 dyno, the car had the 200 cell Fabspeed sport cats on with stock mufflers. BTW, with stock a stock cat and sport mufflers (FD Motorsports Stock) the engine made 239 HP.
So bottom line, with the complete Fabspeed system in place, X pipe, cat delete pipes and Maxflows, the car has picked up 23 HP
. On the Fabspeed website they claim 8 HP for the X pipe and cat delete as well as 14 HP for the Maxflows…that's a total of 22 HP. My car has exceeded their claim by 1 HP. For once, an manufacturer actually lives up to their claims. Customer service is outstanding as well.
To top it off, the construction, fit and finish of these Fabspeed products is world class, made in the USA too, which is important to me.
Cost for the X pipe and the Maxflow mufflers and tips is $2,290, or about $100 a HP…not too shabby.
Went up on the dyno last Friday, the 7th of February, 2014. OMG….on the 3rd of 3 dyno runs, my 1997 993 put out 262 HP to the rear wheels and 258 and 259 on the first 2 pulls. The weather was cool, perfect for making HP, with the oil warmed up to to 185 degrees F. The engine is bone stock, no performance chip, and has never been apart, has 82,000 miles, and on the track since 2001. On a recent leak down, here is what we discovered:
1: 6%
2. 2%
3. 4%
4. 5%
5. 4%
6. 3%
Exhaust is all Fabspeed, X pipe, cat bypass pipes and an earlier iteration of Fabspeed Maxflows. Note, prior to the latest dyno run, the X pipe was sent to Fabspeed for updating. I believe they modified two of the flanges, not completely clear on this, but the cost was moderate and the resulting dyno results impressive.
The latest dyno 262 HP sheet is enclosed along with a previous sheet documenting 252.4 HP. The difference? In the 252.4 dyno, the car had the 200 cell Fabspeed sport cats on with stock mufflers. BTW, with stock a stock cat and sport mufflers (FD Motorsports Stock) the engine made 239 HP.
So bottom line, with the complete Fabspeed system in place, X pipe, cat delete pipes and Maxflows, the car has picked up 23 HP
. On the Fabspeed website they claim 8 HP for the X pipe and cat delete as well as 14 HP for the Maxflows…that's a total of 22 HP. My car has exceeded their claim by 1 HP. For once, an manufacturer actually lives up to their claims. Customer service is outstanding as well.To top it off, the construction, fit and finish of these Fabspeed products is world class, made in the USA too, which is important to me.
Cost for the X pipe and the Maxflow mufflers and tips is $2,290, or about $100 a HP…not too shabby.
02-11-2014 | 05:11 PM
#3
Instructor
Joined: Nov 2013
Posts: 155
Likes: 7
From: Murphy, TX
Thanks for posting the results. That appears to be a significant gain.
A couple of questions that I was wondering about since I have never had a car on a dyno. It looks like the results were from two different companies. Is that the case? And if so, did they use the same equipment? And if not, does that really matter?
What about difference in temperature/humidity/etc. from the test in 2013 vs the test in 2014? You said "The weather was cool, perfect for making HP". Was it the same in 2013? Does it really matter?
Sorry for all the questions, I'm just trying to learn more about the testing. And congrats on the results. That exhaust looks great!
A couple of questions that I was wondering about since I have never had a car on a dyno. It looks like the results were from two different companies. Is that the case? And if so, did they use the same equipment? And if not, does that really matter?
What about difference in temperature/humidity/etc. from the test in 2013 vs the test in 2014? You said "The weather was cool, perfect for making HP". Was it the same in 2013? Does it really matter?
Sorry for all the questions, I'm just trying to learn more about the testing. And congrats on the results. That exhaust looks great!
02-11-2014 | 05:22 PM
#4
Race Car
Joined: Nov 2005
Posts: 3,918
Likes: 10
From: Calgary...Under my car... :)
It would be good to see the results same day, same dyno, The difference in Dyno setup and operator knowledge can automatically give you a 10%+ difference in output. This is with the same type of dyno.
Dyno's are best for comparison purposes or tuning. As soon as you jump around different Dyno's the comparison purpose disappears and are then they are only good for tuning. Going from one type to another really doesn't give a good basis for comparison. Sorry to potentially burst your bubble.
Disclaimer: I have fabspeed products on my car and have not done back to back same day same dyno so don't have any evidence.
Dyno's are best for comparison purposes or tuning. As soon as you jump around different Dyno's the comparison purpose disappears and are then they are only good for tuning. Going from one type to another really doesn't give a good basis for comparison. Sorry to potentially burst your bubble.
Disclaimer: I have fabspeed products on my car and have not done back to back same day same dyno so don't have any evidence.
Last edited by trophy; 02-11-2014 at 05:26 PM. Reason: For Clarity
02-11-2014 | 05:56 PM
#6
Rennlist Member
Joined: Feb 2004
Posts: 12,312
Likes: 9
From: Roseville, CA
For another reference point, on Steve's dyno the stock exhaust on the 3.8 RS engine in the yellow car produced 300 at the crank, 315 with the good exhaust.
And as I've said repeatedly, the difference between them is under 2MPH up the front straight at Thunderhill on a ~2:00 flat lap on the full track.
And as I've said repeatedly, the difference between them is under 2MPH up the front straight at Thunderhill on a ~2:00 flat lap on the full track.
02-11-2014 | 09:09 PM
#7
Technical Guru
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Joined: May 2002
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From: USVI
Any ideas what the POC uses for a correction factor to normalize the dyno-dynamics reading with dynojet and mustang and ???
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02-17-2014 | 03:58 PM
#8
Former Vendor
Joined: Dec 2012
Posts: 351
Likes: 2
Martin,
Great results from a bone stock engine. 262 rwhp is great for a 993.
The modification we did to your X was done inside the X Pipe itself. It was something I tested on our in house '95 993 when I was performing all my R&D on our 993 stock replacement Sport Headers. The below dyno graph shows what I found on our dyno - 10 ft. lbs of torque to the wheels & 8rwhp @4500, with the gains staying until redline. This was over our cat-bypass X-Pipe "Gen 1", which makes about 8-10 ft. lbs of torque over the factory cat pipe.
Great results from a bone stock engine. 262 rwhp is great for a 993.
The modification we did to your X was done inside the X Pipe itself. It was something I tested on our in house '95 993 when I was performing all my R&D on our 993 stock replacement Sport Headers. The below dyno graph shows what I found on our dyno - 10 ft. lbs of torque to the wheels & 8rwhp @4500, with the gains staying until redline. This was over our cat-bypass X-Pipe "Gen 1", which makes about 8-10 ft. lbs of torque over the factory cat pipe.
