boosting the LQ9 a few questions
Thread Starter
On The Tree
Joined: Jun 2009
Posts: 195
Likes: 0
From: Pawtucket, RI
boosting the LQ9 a few questions so guys i got a fresh LQ9 with ARP Head Bolts, ARP Rod Bolts, ARP Cam Bolts, 224/224 .580/.580 lift 114 lsa,comp Valve springs, comp pushrods, ported heads, mls headgaskets. im running the stock truck intake. i wanna get a set of fuel rails, 60# injectors, aeromotive 1000 fuel pressure regulator, and a mp t70 turbo. specs on the turbo are
Compressor
-58 Trim Inducer Wheel
.70 A/R w/ 4"(101.7mm) inlet and 2.5"(64mm) outlet
Turbine
-76 Trim Exducer Wheel (P-Trim)
.96 A/R TURBINE HOUSING w/ standard T4 undivided Inlet and an 3" v-band outlet
where should this turbo spool? exhaust will be made with flipped truck manifolds. what stall convertor should i grab? trans and rear end are completely built. 4.10 gears out back. im runnin a walbro 255 will that be enough for 10 psi? also the truck will have a big front mount intercooler. let me know what you guys think and what kind of power is to be expected.
Compressor
-58 Trim Inducer Wheel
.70 A/R w/ 4"(101.7mm) inlet and 2.5"(64mm) outlet
Turbine
-76 Trim Exducer Wheel (P-Trim)
.96 A/R TURBINE HOUSING w/ standard T4 undivided Inlet and an 3" v-band outlet
where should this turbo spool? exhaust will be made with flipped truck manifolds. what stall convertor should i grab? trans and rear end are completely built. 4.10 gears out back. im runnin a walbro 255 will that be enough for 10 psi? also the truck will have a big front mount intercooler. let me know what you guys think and what kind of power is to be expected.
9 Second Truck Club
iTrader: (17)
Joined: Sep 2006
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From: Colorado Springs, Co/ Central, Ca
That turbo is really small for that combo. It should spool almost off idle, and rip at 5-6 psi long as exhaust is passing thru the waste gate. Prob anything over 8-10psi its going to start choking you to death. The p wheel is your cork.
TECH Regular
Joined: Jun 2010
Posts: 448
Likes: 0
That will definetly get the job done. You may more lag due to the lare exhaust housing. That can be compensated with the right stall converter and or spool valve. I called Forced inductions about mine. They are very informative.
You will need more fuel. I would get a a1000 rather than running twins. May need bigger feed and return depending on hp goals.
You should easily be in the 700-800hp range. Make sure you get a good tune. You will definetly need more fuel at that point.
You will need more fuel. I would get a a1000 rather than running twins. May need bigger feed and return depending on hp goals.
You should easily be in the 700-800hp range. Make sure you get a good tune. You will definetly need more fuel at that point.
10 Second Club
Joined: Dec 2008
Posts: 330
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This man speaks the truth. I was limited, it made the same power at 8 psi as it did at 16 psi. It might have that much at intake but exhaust corks the engine.
Thread Starter
On The Tree
Joined: Jun 2009
Posts: 195
Likes: 0
From: Pawtucket, RI
well borg warner makes the same turbo with a 1.10 AR its 150 more. will that be a better plan? also the stock floating rods will take 800 hp without bending? im running a performabilt stage 3 4l60e you think itll hold up or is a th400 in my future? im running the stock truck intake will it be ok?
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Verdad Gallardo Thread Starter
On The Tree
Joined: Jun 2009
Posts: 195
Likes: 0
From: Pawtucket, RI
could i run the 2 step with a 4l60e? what brand and how do you have it set up. ive always been curiious about running one on a non trans braked auto or if it was only for the manual guys
TECH Enthusiast
Joined: Feb 2009
Posts: 538
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i have 9psi daily on mine and beat on it as well, 562rwhp on a dyno jet through an unlocked 4l80...
Have you verified that the engine is a lq9 and not a lq4? They look identical from the exterior and even use same heads and intake. The lq9 is 10:1scr and the lq4 is 9.4:1 scr. The lq4 will handle up to 10psi on pump gas with proper calibration and enough fuel supply and fmic. 10psi may be pushing it on pump with a lq9
