Intake design
Originally Posted by Sport Side
Is anyone positive on the runner lengths of the Truck intake?
I heard it was very similar in length to the LS6 intake so, it
may just simply be the design of the thing that is holding us
back. I truly do not know. All I see is proof that something
is wrong. Best thing to do from here is try the swap and see
what happens.
I heard it was very similar in length to the LS6 intake so, it
may just simply be the design of the thing that is holding us
back. I truly do not know. All I see is proof that something
is wrong. Best thing to do from here is try the swap and see
what happens.
In theory, if the runner length is equal, then wouldn't the increased volume actually be beneficial to higher rpm power output?
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Intake ManifoldsPart #EnginePlenum VolumeRunner VolumeRunner Length125563331997-2000 LS15.06 L0.536 L262 mm125611822001-2002 LS1/65.19 L0.541 L262 mm125735722002+ LS1/65.19 L0.541 L262 mm??LQ44.0L 0.541 L263 mm
This was on the smokemup site
but nothing on the ls2 truck
1 would think the runners were longer than 1mm difference
This was on the smokemup site
but nothing on the ls2 truck
1 would think the runners were longer than 1mm difference
ok to put it simply (sorry if this is a restatement) the turck intake jus simply isnt moving the volume of air you need up top. like others have said its made for low end grunt for hauling. if you could borrow someones ls6 intake for a dyno pull or 2 you would see quite a difference
On The Tree
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The answer lies mostly in pleum volume, LS6 has much more. Flowbench shows they have similar flow. The truck intake has reverse turn radius than LS6, this was done to gain runner length but also reduces area that makes large plenum impractical. Try using some plenum spacers behind Throttle body to add volume and retest.
Originally Posted by LSwonderfull
The answer lies mostly in pleum volume, LS6 has much more. Flowbench shows they have similar flow. The truck intake has reverse turn radius than LS6, this was done to gain runner length but also reduces area that makes large plenum impractical. Try using some plenum spacers behind Throttle body to add volume and retest.
I think this is the first time I have ever heard of using a TB spacer, I quess it would be the same as a carb spacer on a SBC?
Could you open up the plenum on a truck manifold and make it better?
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I just witnessed the same thing in my 6 liter truck. Road tuned with Wideband. Pulled strong from 3000-5000 dead by 5200.
Shaved, ported Z06 heads, 216-220,525,114 cam, Volant fresh air intake, SW headers, standard truck intake.
MAF flow showed approx 450 HP at the motor.
I don't believe the Z06 intake would help much..... just move whole curve out in the RPM band. From what I've seen with Vettes it runs out around the same 380-400 RWHP. LS2 and 90MM actually makes less power on stock cubed motors.
The new 6.2 truck intake will only work with the new heads.
Not sure what the answer is?
Shaved, ported Z06 heads, 216-220,525,114 cam, Volant fresh air intake, SW headers, standard truck intake.
MAF flow showed approx 450 HP at the motor.
I don't believe the Z06 intake would help much..... just move whole curve out in the RPM band. From what I've seen with Vettes it runs out around the same 380-400 RWHP. LS2 and 90MM actually makes less power on stock cubed motors.
The new 6.2 truck intake will only work with the new heads.
Not sure what the answer is?
Last edited by 422 ragtop; Jan 3, 2006 at 07:08 PM.
LS6 intakes have made over 450 rwhp, so I think you should swap to that. I don't know about the truck versions, but the LS2 car maniflods have proven to be POS's. LS2 vettes are actually swapping back to the LS6's and gaining power.
Originally Posted by Beast96Z
LS6 intakes have made over 450 rwhp, so I think you should swap to that. I don't know about the truck versions, but the LS2 car maniflods have proven to be POS's. LS2 vettes are actually swapping back to the LS6's and gaining power.
Originally Posted by oange ss
is that heresay or you have first hand info ? i'm askin because i dont know, not tryin to be a dick or nothin.....
Originally Posted by Beast96Z
On the HP, plenty of cars have gone over 450rwhp with the LS-6. As for the LS2 manifold sucking, lots of people lost HP with those intakes when they first came out. They were the "next big thing" before you could get them, then when they did, everyone was pissed. Ed Wright talked a while back about the swap back to LS-6 intakes from the LS2, so I would call that first hand info. He's a very reputable tuner in the Vette crowd and if anyone has seen it, he has.
i know Hot Rod did a comparo between a FAST 78, LS2 and an LS6, the LS2 lost HP compared to the others, but the test was BS, because no adjustments were made to the PCM to compensate for any of the swaps...i'm just wondering if adjustments were made to optimize each combo what the results would look like
Just did a little research, and wow, there are alot of different "truck" manifolds
# 17113697 -- 99-02 full size truck 4.8, 5.3, & 6.0L $499.63
# 89017365 -- 2003 full size truck 4.8, 5.3, & 6.0L
-- 2004 5.3L flex fuel $472.05
# 89017363 -- 04-06 full size truck 4.8, 5.3, & 6.0L
-- 05-06 5.3L flex fuel $700.94
# 89017366 -- 03-04 Trailblazer/SSR 5.3L $472.05
# 89017588 -- 2005 Trailblazer/SSR 5.3 & 6.0L (LS2) $542.91
# 12580420 -- 2006 Trailblazer/SSR 5.3 & 6.0L (LS2) $186.76
-- 2007 New style SUV 4.8 & 5.3L $186.76
# 12580678 -- 2007 New style SUV 6.0 (L76) & 6.2L (L92) $253.59
Hope this helps you guys!
# 17113697 -- 99-02 full size truck 4.8, 5.3, & 6.0L $499.63
# 89017365 -- 2003 full size truck 4.8, 5.3, & 6.0L
-- 2004 5.3L flex fuel $472.05
# 89017363 -- 04-06 full size truck 4.8, 5.3, & 6.0L
-- 05-06 5.3L flex fuel $700.94
# 89017366 -- 03-04 Trailblazer/SSR 5.3L $472.05
# 89017588 -- 2005 Trailblazer/SSR 5.3 & 6.0L (LS2) $542.91
# 12580420 -- 2006 Trailblazer/SSR 5.3 & 6.0L (LS2) $186.76
-- 2007 New style SUV 4.8 & 5.3L $186.76
# 12580678 -- 2007 New style SUV 6.0 (L76) & 6.2L (L92) $253.59
Hope this helps you guys!
Last edited by NO-OPTION-2002; Jan 4, 2006 at 10:07 AM.
Thread Starter
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Originally Posted by NO-OPTION-2002
Just did a little research, and wow, there are alot of different "truck" manifolds
# 17113697 -- 99-02 full size truck 4.8, 5.3, & 6.0L $499.63
# 89017365 -- 2003 full size truck 4.8, 5.3, & 6.0L
-- 2004 5.3L flex fuel $472.05
# 89017363 -- 04-06 full size truck 4.8, 5.3, & 6.0L
-- 05-06 5.3L flex fuel $700.94
# 89017366 -- 03-04 Trailblazer/SSR 5.3L $472.05
# 89017588 -- 2005 Trailblazer/SSR 5.3 & 6.0L (LS2) $542.91
# 12580420 -- 2006 Trailblazer/SSR 5.3 & 6.0L (LS2) $186.76
-- 2007 New style SUV 4.8 & 5.3L $186.76
# 12580678 -- 2007 New style SUV 6.0 (L76) & 6.2L (L92) $253.59
Hope this helps you guys!
# 17113697 -- 99-02 full size truck 4.8, 5.3, & 6.0L $499.63
# 89017365 -- 2003 full size truck 4.8, 5.3, & 6.0L
-- 2004 5.3L flex fuel $472.05
# 89017363 -- 04-06 full size truck 4.8, 5.3, & 6.0L
-- 05-06 5.3L flex fuel $700.94
# 89017366 -- 03-04 Trailblazer/SSR 5.3L $472.05
# 89017588 -- 2005 Trailblazer/SSR 5.3 & 6.0L (LS2) $542.91
# 12580420 -- 2006 Trailblazer/SSR 5.3 & 6.0L (LS2) $186.76
-- 2007 New style SUV 4.8 & 5.3L $186.76
# 12580678 -- 2007 New style SUV 6.0 (L76) & 6.2L (L92) $253.59
Hope this helps you guys!
Did you by chance see any dimensions on these?
plenum vol, runner length that sort of thing?
Did you by chance see any dimensions on these?
plenum vol, runner length that sort of thing?
plenum vol, runner length that sort of thing?
Sorry.
Originally Posted by NO-OPTION-2002
# 89017588 -- 2005 Trailblazer/SSR 5.3 & 6.0L (LS2) $542.91
# 12580420 -- 2006 Trailblazer/SSR 5.3 & 6.0L (LS2) $186.76
-- 2007 New style SUV 4.8 & 5.3L $186.76
# 12580678 -- 2007 New style SUV 6.0 (L76) & 6.2L (L92) $253.59
Hope this helps you guys!
# 12580420 -- 2006 Trailblazer/SSR 5.3 & 6.0L (LS2) $186.76
-- 2007 New style SUV 4.8 & 5.3L $186.76
# 12580678 -- 2007 New style SUV 6.0 (L76) & 6.2L (L92) $253.59
Hope this helps you guys!