408ci build, expectations/suggestion.......
408ci build, expectations/suggestion....... Have a friend putting together a 408 LQ4, we r wondering what everyone thinks it will put down, anyone have any tips or suggestions on the build itself?
Details: 408LQ4 Mahle -12cc dish pistons (.020 above deck), 10.9:1 SCR,
PRC Stg 2.5 Ls6 heads, 64cc chambers .660 dual springs,
kooks 1.75" LTs,
TSP True Duals,
Catless, 42lb green top SVO injectors
gm mls headgasket
K1 6.125 rods
K1 4" crank
242/246 .612 .614 113 + 2
Ls7 Lifters
Tsp Oil pump
Asp 25% UD
Monster Stg 3 Clutch and flywheel kit
moser 12bolt 4:10s
Fast 90/90
Volant Twin cone Fbody CAI
85mm Maf
Steel DS
Car is a 2001 M6 WS6, will be dynoed on a dynojet 248h. Dyno is a bit tough, G6x3 cam, 1.875" Kooks, o/r xpipe, Ud pulley, fast 102, cold air induction CAI, M6 2010 LS3 Camaro put down 483/445wtq on same dyno.
Hes hoping for 525ish whp/490wtq
Other cars that have dynoed @ the same shop:
WWW.DYNOSPORT.COM
Details: 408LQ4 Mahle -12cc dish pistons (.020 above deck), 10.9:1 SCR,
PRC Stg 2.5 Ls6 heads, 64cc chambers .660 dual springs,
kooks 1.75" LTs,
TSP True Duals,
Catless, 42lb green top SVO injectors
gm mls headgasket
K1 6.125 rods
K1 4" crank
242/246 .612 .614 113 + 2
Ls7 Lifters
Tsp Oil pump
Asp 25% UD
Monster Stg 3 Clutch and flywheel kit
moser 12bolt 4:10s
Fast 90/90
Volant Twin cone Fbody CAI
85mm Maf
Steel DS
Car is a 2001 M6 WS6, will be dynoed on a dynojet 248h. Dyno is a bit tough, G6x3 cam, 1.875" Kooks, o/r xpipe, Ud pulley, fast 102, cold air induction CAI, M6 2010 LS3 Camaro put down 483/445wtq on same dyno.
Hes hoping for 525ish whp/490wtq
Other cars that have dynoed @ the same shop:
WWW.DYNOSPORT.COM
TECH Addict
Joined: Sep 2009
Posts: 2,481
Likes: 5
From: PA/MD
Looks pretty good, personally I ditched my MAF in favor for an SD tune, and went with a 255/263 .634/.624 115lsa cam. You would be suprised st how much duration the larger cubes eat up and tame down.
I'm gonna guess 480-490hp. That's not quite enough cam/compression/heads to reach 525rwhp IMO. But hey, I could be wrong.
Also, there's a whole section dedicated to dyno guessing and bench racing
https://ls1tech.com/forums/dyno-gues...ing-forum-150/
Also, there's a whole section dedicated to dyno guessing and bench racing
https://ls1tech.com/forums/dyno-gues...ing-forum-150/
Kinda looking for more than just guesses here, really appreciate others feed back on what the weak parts of the build are.
Still wanting a streetable car so didnt go bat **** crazy with it. Figured the cam posted with a little larger LSA, but appreciate the suggestions!
Still wanting a streetable car so didnt go bat **** crazy with it. Figured the cam posted with a little larger LSA, but appreciate the suggestions!
Have a friend putting together a 408 LQ4, we r wondering what everyone thinks it will put down, anyone have any tips or suggestions on the build itself?
Details: 408LQ4 Mahle -12cc dish pistons (.020 above deck), 10.9:1 SCR,
PRC Stg 2.5 Ls6 heads, 64cc chambers .660 dual springs,
kooks 1.75" LTs,
TSP True Duals,
Catless, 42lb green top SVO injectors
gm mls headgasket
K1 6.125 rods
K1 4" crank
242/246 .612 .614 113 + 2
Ls7 Lifters
Tsp Oil pump
Asp 25% UD
Monster Stg 3 Clutch and flywheel kit
moser 12bolt 4:10s
Fast 90/90
Volant Twin cone Fbody CAI
85mm Maf
Steel DS
Car is a 2001 M6 WS6, will be dynoed on a dynojet 248h. Dyno is a bit tough, G6x3 cam, 1.875" Kooks, o/r xpipe, Ud pulley, fast 102, cold air induction CAI, M6 2010 LS3 Camaro put down 483/445wtq on same dyno.
Hes hoping for 525ish whp/490wtq
Other cars that have dynoed @ the same shop:
WWW.DYNOSPORT.COM
Details: 408LQ4 Mahle -12cc dish pistons (.020 above deck), 10.9:1 SCR,
PRC Stg 2.5 Ls6 heads, 64cc chambers .660 dual springs,
kooks 1.75" LTs,
TSP True Duals,
Catless, 42lb green top SVO injectors
gm mls headgasket
K1 6.125 rods
K1 4" crank
242/246 .612 .614 113 + 2
Ls7 Lifters
Tsp Oil pump
Asp 25% UD
Monster Stg 3 Clutch and flywheel kit
moser 12bolt 4:10s
Fast 90/90
Volant Twin cone Fbody CAI
85mm Maf
Steel DS
Car is a 2001 M6 WS6, will be dynoed on a dynojet 248h. Dyno is a bit tough, G6x3 cam, 1.875" Kooks, o/r xpipe, Ud pulley, fast 102, cold air induction CAI, M6 2010 LS3 Camaro put down 483/445wtq on same dyno.
Hes hoping for 525ish whp/490wtq
Other cars that have dynoed @ the same shop:
WWW.DYNOSPORT.COM
Last edited by Sales@Tick; Apr 12, 2012 at 03:22 PM.
Trending Topics
248/256 .615/.622 113 lsa
and i have the ls6 stage 3 heads
and Fast 92/92
Its going to depend alot on your compression that you end up running. I have 10:1 with -10cc pistons. If you bump to 11.5:1 or even 12:1 you could make 520-540rwhp I would think.
and i have the ls6 stage 3 heads
and Fast 92/92
Its going to depend alot on your compression that you end up running. I have 10:1 with -10cc pistons. If you bump to 11.5:1 or even 12:1 you could make 520-540rwhp I would think.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo With the 12cc dish mahle and 64cc heads I think we are hard pressed to get to the 11.5:1 and higher SCR. Heck the pistons are already around :020 to :025 above deck! Tried talking him into going with the 8cc dish pistons from weisco but he didnt want to spend the extra 125-150 bucks for them. Should be around 10.9:1 SCR
Well the heads were to get milled down farther, I think it would be losing some Flow for Compression. Another thing is how much PTV we would still have. It should have enough room with the dished pistons but Im sure we would want to check first.
Im guessing a upgraded set of PRC Stg 3 LS6 heads slightly milled and a little bigger stick (246/253 .62x .62x 112LSA) would be a nice upgrade for him down the road. would be nice to convince him to go with a set of TFS or AFR's!!
Im guessing a upgraded set of PRC Stg 3 LS6 heads slightly milled and a little bigger stick (246/253 .62x .62x 112LSA) would be a nice upgrade for him down the road. would be nice to convince him to go with a set of TFS or AFR's!!
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
Take it with a grain of salt, this is the internet. I think it looks like a strong combination of parts for the money invested......however, I would ditch the (I presume) stock steel DS in favor of an aftermarket unit, and like already stated consider a SD tune. 1 7/8 th headers may benefit some on this combo as well. We are just trying to help you. If you want semi-exact numbers, nobody can give them to you, but some digging on your part may yield some numbers on some very similar combos.
I understand this is the interwebs just seeing if everyones on the same page so r expectations arent too high, and some insight on the areas we have to improve on.
