Best way to choke a 408 N/A..... unported GMPP L92 Intake FTL!
04-23-2008, 05:33 PM
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Best way to choke a 408 N/A..... unported GMPP L92 Intake FTL! tuned it... tuner said 91kpa is where it was reading by 4500 rpm..... didnt pick up more power no matter how much timing or fuel. He said the intake is like sucking thru a stirring straw for the motor.
Results will not be posted on my setup until the issue is fixed.
Options are:
-Port the GMPP
-Wait for a Fast 92 L92
-Wait for a Star Products L92
Results will not be posted on my setup until the issue is fixed.
Options are:
-Port the GMPP
-Wait for a Fast 92 L92
-Wait for a Star Products L92
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04-24-2008, 01:50 AM
#8
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I just got my 427 ported L92/L76 tuned and dynoed as well, and mine went to 90kpa in the early 6's. On the dynojet , the peak #'s were 447hp @ 6300 and 400 tq. @ 5600 in an S10 x-cab with poorly fabbed 1 3/4 headers and non-mandrel bent dual 2.5 exhaust, built 4L60 w/ an 11" 3600 converter, a heavy 2 pc. steel driveshaft, and heavy 18" wheels.
Take that for what it's worth. Even with my crappy headers it still pulled that big of a vacuum in the manifold.
Take that for what it's worth. Even with my crappy headers it still pulled that big of a vacuum in the manifold.
04-24-2008, 10:13 AM
#10
Try the Accufab 4 barrell TB on top of the intake. Many going fast with single planes are running this combo.
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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.
04-24-2008, 12:05 PM
#14
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I would wait man, unless you just have to have it setup now. Since you have the manifold and the elbow you might look into porting, but I would just wait for the fast or the weiand. I'm having to wait also, almost went with the GMPP but some good sources said to wait. *cue Jeopardy music* 
04-24-2008, 02:30 PM
#18
This is a 4 barrell carburetor application, but it's still a GMPP single plane intake and L92s.
Check it out:
https://ls1tech.com/forums/drag-racing-results/901758-hit-9-s-n-pump-gas-l92-heads.html
Check it out:
https://ls1tech.com/forums/drag-racing-results/901758-hit-9-s-n-pump-gas-l92-heads.html
__________________
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.
04-24-2008, 02:36 PM
#20
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http://i31.photobucket.com/albums/c3...s6/WS6/099.jpg
that would work but it is hard to Maf tune and filter.