Ported FAST 90 vs LS6 dyno comparison
Thread Starter
Joined: Nov 2001
Posts: 8,246
Likes: 34
From: Victoria, TX
Ported FAST 90 vs LS6 dyno comparison I've done this many times on high compression applications, but never on a 9.2:1 compression motor running 87 octane. The following dyno comparison is on my 2000 TA with a forged 347, 9.2:1 static compression, AFR 225 heads, and 224/230 .609/.604 113LSA +2 turbo cam. With help from 98Aggie (Kurt Decker), we baseline dynoed the car with an optimally tuned motor running an LS6 intake, factory 78mm TB and 85mm MAF. While the car was still on the dyno, we swapped to the Tony Mamo ported FAST 90 intake and Nick Williams 90mm throttle body. Same day, same dyno.
As usual, the Mamofied FAST lost nothing down low, but gained nicely in the upper ranges. The baseline dyno was 425 rwhp/405 rwtq. The after dyno was 449 rwhp/414 rwtq. A gain of 24 rwhp and 9 in torque. I've seen higher gains with 11.5:1 motors, but I was curious to see if the gains would work on a 9.2:1 motor. It did. Not surprising, my KPa at WOT improved with the intake/TB swap. Before, my manifold pressure would drop from 101KPa to 94KPa at WOT at peak power. Now, the pressure only drops from 101KPa to 97KPa. An improvement of 3KPa mean the engine is pulling less of a vacuum at WOT. Less intake restriction. Hats off to Tony Mamo for another great manifold.
As usual, the Mamofied FAST lost nothing down low, but gained nicely in the upper ranges. The baseline dyno was 425 rwhp/405 rwtq. The after dyno was 449 rwhp/414 rwtq. A gain of 24 rwhp and 9 in torque. I've seen higher gains with 11.5:1 motors, but I was curious to see if the gains would work on a 9.2:1 motor. It did. Not surprising, my KPa at WOT improved with the intake/TB swap. Before, my manifold pressure would drop from 101KPa to 94KPa at WOT at peak power. Now, the pressure only drops from 101KPa to 97KPa. An improvement of 3KPa mean the engine is pulling less of a vacuum at WOT. Less intake restriction. Hats off to Tony Mamo for another great manifold.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
Last edited by Patrick G; Feb 3, 2008 at 04:03 PM.
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Very good information. Any chance we'll see the same comparison done on a high compression motor ?? I bet the results would be even more dramatic. I'd guess a bit more hp and much better torque.
Test Nice back to back! Good info, not to sidetrack the thread but how much is the 85mm MAF worth over the stock one? Have you documented this before?
I ask because I am seeing MAP at 94 Kpa WOT with my 90MM NW TB and Mamo ported fast from a start of 100Kpa Baro. I was curious if it was the MAF and if the 85MM version would be worth anything? Mine is only 402 RWHP unlocked through an A4 and 9" Ford w/ 3.70's
I ask because I am seeing MAP at 94 Kpa WOT with my 90MM NW TB and Mamo ported fast from a start of 100Kpa Baro. I was curious if it was the MAF and if the 85MM version would be worth anything? Mine is only 402 RWHP unlocked through an A4 and 9" Ford w/ 3.70's
Thread Starter
Joined: Nov 2001
Posts: 8,246
Likes: 34
From: Victoria, TX
Nice back to back! Good info, not to sidetrack the thread but how much is the 85mm MAF worth over the stock one? Have you documented this before?
I ask because I am seeing MAP at 94 Kpa WOT with my 90MM NW TB and Mamo ported fast from a start of 100Kpa Baro. I was curious if it was the MAF and if the 85MM version would be worth anything? Mine is only 402 RWHP unlocked through an A4 and 9" Ford w/ 3.70's
I ask because I am seeing MAP at 94 Kpa WOT with my 90MM NW TB and Mamo ported fast from a start of 100Kpa Baro. I was curious if it was the MAF and if the 85MM version would be worth anything? Mine is only 402 RWHP unlocked through an A4 and 9" Ford w/ 3.70's
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
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An 85mm MAF is not usually a benefit when running a stock 78mm TB. The throttle body is the choke in the induction at that point. But once you go to a FAST 90, the stock 75mm MAF becomes the choke and there is a benefit to running the 85mm MAF. This swap was a good A-B comparison because the manifold was the only thing changed. The 85mm MAF was used in both comparisons.
Wow, impressive results. This makes me think about doing a 90/90/85 swap on my mild H/C setup. It would be much cheaper than upgrading the whole heads/cam package. It obviously wouldn't net the same gains, but would be attainable budget-wise and looks like it would help out quite a bit, not to mention it would be handy to have when I do have the money for the new H/C setup.
What kind of tuning would probably be required after a 90/90/85 swap on an already tuned mild H/C setup?
What kind of tuning would probably be required after a 90/90/85 swap on an already tuned mild H/C setup?
Thread Starter
Joined: Nov 2001
Posts: 8,246
Likes: 34
From: Victoria, TX
Very little additional tuning involved if you're already running a MAF. If you're running speed density, you'll definitely need to increase your VE numbers to compensate for the additional airflow. You'll also need to make sure the hole in the throttle plate matches the one on the stocker (if you're running a cable operated TB). Often, the NW TB has a hole that is much smaller than stock.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
An 85mm MAF is not usually a benefit when running a stock 78mm TB. The throttle body is the choke in the induction at that point. But once you go to a FAST 90, the stock 75mm MAF becomes the choke and there is a benefit to running the 85mm MAF. This swap was a good A-B comparison because the manifold was the only thing changed. The 85mm MAF was used in both comparisons.
The numbers seem pretty high for a mustang but its possible to set the mustang to spit out dynojet equivalent.Our local shop did that as guys didn't like the mustang numbers.
Still regardless good gain.
Still regardless good gain.
As you mentioned however, the most important aspect of those curves is the delta between the two (whether it baselined at 400 or 475 RWHP)....they literally swapped intakes while it was strapped to the dyno and ran the test within 90 minutes of one another. Thats as good as it gets to eliminate any variables in the testing procedures.
Tony