Best twins for a LSX 427?
Thread Starter
TECH Resident
iTrader: (13)
Joined: Feb 2012
Posts: 821
Likes: 0
From: Harford co. MD
Best twins for a LSX 427? Think i decided to go twins due to size and need to know what pair will work best. The build is a forged LSX 427 fully ported ,4l80 trans,9" rear mostly street but some track time looking for 1000+ rwhp with quick spool time and maybe some room to grow! Any help would be appreciated plus i need to buy the turbos,wastegates,and bov's so vendors jump on!
FormerVendor
Joined: Dec 2001
Posts: 2,444
Likes: 2
From: WWW.SPEEDINC.COM
Would you rather have very fast response or would you rather sacrifice some response for more power potential?
For a 1000rwhp 427, twin 35R's would be very fun and have almost no perceptible lag. That's how I prefer it, to get pushed back in the seat -as- you are rolling onto the throttle, not after.
6766's will make a good bit more power but aren't going to have the part throttle hit the 35's have.
For a 1000rwhp 427, twin 35R's would be very fun and have almost no perceptible lag. That's how I prefer it, to get pushed back in the seat -as- you are rolling onto the throttle, not after.
6766's will make a good bit more power but aren't going to have the part throttle hit the 35's have.
Teching In
Joined: Mar 2009
Posts: 48
Likes: 0
Would you rather have very fast response or would you rather sacrifice some response for more power potential?
For a 1000rwhp 427, twin 35R's would be very fun and have almost no perceptible lag. That's how I prefer it, to get pushed back in the seat -as- you are rolling onto the throttle, not after.
6766's will make a good bit more power but aren't going to have the part throttle hit the 35's have.
For a 1000rwhp 427, twin 35R's would be very fun and have almost no perceptible lag. That's how I prefer it, to get pushed back in the seat -as- you are rolling onto the throttle, not after.
6766's will make a good bit more power but aren't going to have the part throttle hit the 35's have.
I'd love to see some combinations running this turbo.
Thread Starter
TECH Resident
iTrader: (13)
Joined: Feb 2012
Posts: 821
Likes: 0
From: Harford co. MD
I would really like a happy med. but if i had to favor a side the quicker responce would win! I know a few guys starting to play with single 6466's on the turbo buicks with nice results!
I've been in a FordGT with twin GT35R's and it spooled up too fast. 1st and 2nd gear were pretty much unuseable.... that was even on low boost. They spooled instantly literally.
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
Would you rather have very fast response or would you rather sacrifice some response for more power potential?
For a 1000rwhp 427, twin 35R's would be very fun and have almost no perceptible lag. That's how I prefer it, to get pushed back in the seat -as- you are rolling onto the throttle, not after.
6766's will make a good bit more power but aren't going to have the part throttle hit the 35's have.
For a 1000rwhp 427, twin 35R's would be very fun and have almost no perceptible lag. That's how I prefer it, to get pushed back in the seat -as- you are rolling onto the throttle, not after.
6766's will make a good bit more power but aren't going to have the part throttle hit the 35's have.
Thread Starter
TECH Resident
iTrader: (13)
Joined: Feb 2012
Posts: 821
Likes: 0
From: Harford co. MD
Yea i have seen allot of bad press on precision lately so i may stay away from them. Running to small a turbo/s was a big concern due to back pressure and i dont want it to be so touchy from instant spool its not driveable on the street!
onfire how long did you run those turbos for ? and any effects on the motor or turbos ? sounds like a peppy setup , i know 35s are good for alot of power ,, and the .82 ar is not too small
You could run that set-up for years. I am bad to change combos so I never got close to the limit of those turbos...18psi and 4 bolt heads and never a problem.
We have several customers running similar setups. The Tnetics 6665's have been used quite a bit and also the GTX3582's. Both turbos make the HP you want no problem. Prices are quite a bit different though, but nonetheless both are great units. Both are very compact and offer tons of options for customizing to your setup.
X2. For a primarily street car, 427ci, stock weight, hard to beat the GT3582R, especially the new GTX....At 3900lbs and the Speed Inc kit with GT35's I could pop both bulbs on, hit the transbrake at 3000 rpm (could have footbraked it) and pop off a 1.35 sixty and 9.2 at 146mph at 18psi....more left in it back then.
On the other hand, I have 76s on my 427, and although laggier, the TH400 makes it managable.
