416CI L92 motor
416CI L92 motor Im picking up a 416 L92 shortblock i have a set of ported ls1 heads and a ls6 intake will this setup work ore will i have to get better heads, the flow numbers are
INTAKE EXHAUST
.100 72 63
.200 149 120
.300 205 155
.400 255 190
.500 287 214
.600 307 220
.625 310 228
INTAKE EXHAUST
.100 72 63
.200 149 120
.300 205 155
.400 255 190
.500 287 214
.600 307 220
.625 310 228
You head flow is average for a 346. It will be a little soft for a 416, but the biggest restriction is going to be the LS6 intake. A ported FAST 90 would help a bunch in this case...maybe 20-30 rwhp.
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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.
TECH Veteran
Joined: Dec 2001
Posts: 4,117
Likes: 0
From: Ft. Lauderdale, FL, USA
Originally Posted by playboy245
in terms of a throttle body what would be a good choice?, i got the ls6 intake for a good price but i guess ill have to sell it for the fast intake
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ditch the heads and intake you have, get the L92 heads with upgraded springs ($1100) and the L76 setup ($528)....this gives you intake, fuel rails, injectors, and 90mm TB. For $1700 you have the perfect match for your engine....you should be able to sell you heads and intake for a good portion of that. Some people have gottne 550 rwhp with this same setup....pickling a cam is the hard part.
SDB
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Verdad Gallardo TECH Veteran
Joined: Dec 2001
Posts: 4,117
Likes: 0
From: Ft. Lauderdale, FL, USA
Originally Posted by All Pro Heads
Not so sure the L76 is a big difference over the Fast 90, but the L92/L76 combo is defentially better then the heads you have with a Fast 90.
Either way, whichever intake he uses, that intake will not allow the ported L92 heads to flow to their potential, so really it doesn't matter. Intake will remain the weak link.
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I plan on running around 500hp or more if possible, i also plan on running this car as a weekend warrior that i take on the street for a little fun also. I plan on keeping this car a normally aspirated one. What is the L76 intake off of, and what tb will i use if i ditch my current heads and intake for the L92/L76 combo. I also dont know where i would to sell my current combo, all help is greatly appreciated..
OK...the L92 heads you get from SDPC, $1100 assembled with springs good till .650 lift. The L76 intake assembly is $528 also from SDPC. WIth this you get:
Intake manifold
Fuel rails
fuel injectors that will support 550 rwhp NA
90mm stock TB
get it, sell the old ****, and make some serious power. Be sure to get the right cam, some people on this board have done some initial cam work, and have found some that work well!
Intake manifold
Fuel rails
fuel injectors that will support 550 rwhp NA
90mm stock TB
get it, sell the old ****, and make some serious power. Be sure to get the right cam, some people on this board have done some initial cam work, and have found some that work well!
Ok
I'm doing exactly what many have suggested to you but I only have 375 CI the final numbers looked like this for cost:
CNC l92's from TSP 1500
L76 intake, fuel rails, injectors and electronic TB 575 w/ freight
New cam and LS7 lifters w/ offset L92 rocker arms 525
Cometic gaskets and misc stuff 300
Total money out 2900
Parts to sell or sold fromcurrent setup:
Ported 5.3 heads and old cam 400, Fast 90intake w/ N20 burst panel kit 800, current 42lb injectors 250, new electronic TB included w/ L76 package 100
That is 1550 back after I sell these parts so I'm only out about 1400 and should see an increase of atleast 50 RWHP. I expect to have Dyno numbers by Wednesday for Validation of expected power increases.
I hope this helps.
BTW you will reuse your fast 90 TB with the new L76 intake. You should buy the SLP throttle cable bracket for the L76 about 50.00 and an injector harness adaptor kit about 100.00 from Katech.
Jason
I'm doing exactly what many have suggested to you but I only have 375 CI the final numbers looked like this for cost:
CNC l92's from TSP 1500
L76 intake, fuel rails, injectors and electronic TB 575 w/ freight
New cam and LS7 lifters w/ offset L92 rocker arms 525
Cometic gaskets and misc stuff 300
Total money out 2900
Parts to sell or sold fromcurrent setup:
Ported 5.3 heads and old cam 400, Fast 90intake w/ N20 burst panel kit 800, current 42lb injectors 250, new electronic TB included w/ L76 package 100
That is 1550 back after I sell these parts so I'm only out about 1400 and should see an increase of atleast 50 RWHP. I expect to have Dyno numbers by Wednesday for Validation of expected power increases.
I hope this helps.
BTW you will reuse your fast 90 TB with the new L76 intake. You should buy the SLP throttle cable bracket for the L76 about 50.00 and an injector harness adaptor kit about 100.00 from Katech.
Jason
