Turbo size for a TT 427?
Thread Starter
TECH Resident
iTrader: (13)
Joined: Feb 2012
Posts: 821
Likes: 0
From: Harford co. MD
Turbo size for a TT 427? Getting ready to buy a pair of turbo's for my lsx 427 build shooting for
1Kwhp maybe a bit more down the road I had planned on picking up a pair of Comp 6767BB .81 housing i seen a few guys run 67's on a 427 with good results plus they are a fairly small package to place are these a good choice or should i go a bit bigger?
1Kwhp maybe a bit more down the road I had planned on picking up a pair of Comp 6767BB .81 housing i seen a few guys run 67's on a 427 with good results plus they are a fairly small package to place are these a good choice or should i go a bit bigger?
Getting ready to buy a pair of turbo's for my lsx 427 build shooting for
1Kwhp maybe a bit more down the road I had planned on picking up a pair of Comp 6767BB .81 housing i seen a few guys run 67's on a 427 with good results plus they are a fairly small package to place are these a good choice or should i go a bit bigger?
1Kwhp maybe a bit more down the road I had planned on picking up a pair of Comp 6767BB .81 housing i seen a few guys run 67's on a 427 with good results plus they are a fairly small package to place are these a good choice or should i go a bit bigger?
Turbine side is bit small (too much back pressure) and you have to run turbo real hard on anything over 1000whp.
Street & strip / between 6775 or 7175.
Thread Starter
TECH Resident
iTrader: (13)
Joined: Feb 2012
Posts: 821
Likes: 0
From: Harford co. MD
I would like to it the 1k at 15-18psi Comp has a 7075 with .81 or .96 exhaust housing just a little bigger frame i think they have a .96 housing for the 6767 also. I just dont want to make it very laggy going to big on the turbo's.
id run PTE 6266 with a t4..... they have a .58 and a .68 AR option.... the nice this is you plan around a t4 and once that 1000 gets borring. you just up the AR and the turbos will support more...
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
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
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
FormerVendor
Joined: Dec 2001
Posts: 2,444
Likes: 2
From: WWW.SPEEDINC.COM
6266's on a 427 would have great response and easily reach your goal of 1000rwhp and could do 1150+ if pushed.
Twin 7675's are good for close to 2000rwhp so I would say they are overkill. No sense in sacrificing a ton of response and midrange power if you aren't going for at least 1600-1700whp with these.
Twin 7675's are good for close to 2000rwhp so I would say they are overkill. No sense in sacrificing a ton of response and midrange power if you aren't going for at least 1600-1700whp with these.
Fwiw i have a 400" sbc making 1009 sae thru a 4500-ish stall th400, on master power T70's. T4 .96's. p trim 64/74 turbine wheel, starts making some psi in the mid higher 3000's, really starts coming in lower 4000's. definately full boost above 4500-5000. Shift 7-7.2 if needed. Its smooth spool, not tire shredding instant but not some huge lag. I like it. But also havent played with spool tune up lol its still low on timing
I would think a new tech 64-67mm could work but with the cubes you'll likely fit maps better with a 67-71 ish size.
I would think a new tech 64-67mm could work but with the cubes you'll likely fit maps better with a 67-71 ish size.
Thread Starter
TECH Resident
iTrader: (13)
Joined: Feb 2012
Posts: 821
Likes: 0
From: Harford co. MD
Nope dont paln on pushing the power that far maybe 1300 way down the road but that would be it for this build. I will be running a 4L80E trans and 93 pump thats is why i plan to keep the boost down.
I will be running a pair of TC 76/68s witha .96ar on my 427 LS next gen motor. I would not be afraid of a 75/76 at all!
I do know of a twin turbo 427 GTO that has PT62/66s and made a 999rwhp on 22lbs of boost. They are currently in the process of upgrading to PT 75/76s if that tells you anything.
To me its all about what you can or cannot afford. I am running 76/68s cause I got a good deal on them and should be about right for a 427. If I need to upgrade in the future I will but I want to see what these are capable of first.
I do know of a twin turbo 427 GTO that has PT62/66s and made a 999rwhp on 22lbs of boost. They are currently in the process of upgrading to PT 75/76s if that tells you anything.
To me its all about what you can or cannot afford. I am running 76/68s cause I got a good deal on them and should be about right for a 427. If I need to upgrade in the future I will but I want to see what these are capable of first.
PTE6766's 1.08A/R will easily make 1000rwhp and 1400+rwhp later on when u you go crazy is your car manual or auto?
I have them in one of the cars I build made 1085rwhp 16-17psi on 91octane 454ci LSX C6ZO6.
I have them in one of the cars I build made 1085rwhp 16-17psi on 91octane 454ci LSX C6ZO6.
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
Staging Lane
Joined: Jan 2012
Posts: 63
Likes: 0
this is my plan on my LSX 427 built by HKE. Currently running my D1SC from my LS3 which i popped. Planning on .96 A/R with T4 housings. Initial plan is about 20psi and between 1000-1100rwhp on my 5th gen Camaro. Hope this combo works out ok!