Sitll confused about intake issues....please help......
Thread Starter
TECH Addict
Joined: Feb 2003
Posts: 2,864
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From: Geneseo, NY
Sitll confused about intake issues....please help......
1997-2000 LS1: #12556333
-5.06 liter Plenum vol
-262mm runner
-.536 liters runner vol
2001+ LS6: # 12573572
-5.19 liters Plenum vol
-262mm runner
-.541 liters runner vol
2002 Truck (LR4,LM7,LQ4 # 12574009)
-4.0 liters Plenum vol
-263mm runner
-.513 liter runner vol
-5.06 liter Plenum vol
-262mm runner
-.536 liters runner vol
2001+ LS6: # 12573572
-5.19 liters Plenum vol
-262mm runner
-.541 liters runner vol
2002 Truck (LR4,LM7,LQ4 # 12574009)
-4.0 liters Plenum vol
-263mm runner
-.513 liter runner vol
I have spoken via e-mail to John at Speartech and he tells me I should see no power loss by switching to the LS1 intake (I am prepared for a small torque loss down low but do not expect it)the reason I am concerned is because my LS1 intake is in the mail and I plan on doing the swap very soon....hopefully as soon as John gets me the pics of the truck alternator bracket modified with the relocated idler pulley and rerouted serpetine belt allowing use of the LS1 intake with stock truck accessories
given stock LQ9 heads, a VERY mild cam and assuming the engine will NEVER see more than 6000rpm is the LS1 intake manifold going to be a bottleneck compared to the truck intake??....am I better off sticking with the truck intake and using that for my direct-port plans (which is the main reason other than aesthetics and the fact that the LS1 intake was free that I want to do the switch)
can someone please answer these questions for me before I get into something I will regret???
Thanks....
Al
Re: Sitll confused about intake issues....please help...... It will be tough for most guys to give you a true educated answer. The truck manifolds do not physically fit under our cowl, so we haven't been able to test them.
My guess.. the LS6 intake will out perform any of the truck intakes in everything but torque.
My guess.. the LS6 intake will out perform any of the truck intakes in everything but torque.
Thread Starter
TECH Addict
Joined: Feb 2003
Posts: 2,864
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From: Geneseo, NY
Re: Sitll confused about intake issues....please help...... how about the LS1 intake ???.....given the numbers above the LS1 should signinficantly outflow the truck intake at higher RPM's and only suffer a minor torque loss down low due to decreased runner velocity....correct ???
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Joined: Nov 2001
Posts: 319
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From: Las Vegas
Re: Sitll confused about intake issues....please help...... It seems to me that as far as RPM bottlenecking goes, you would not have that issue with the LS1 or LS6 manifold.
A truck(stock), typically won't ever see revs past 5500-5900 anyway.
While some LS1 and many LS6 manifolds run at or above 6500 rpm.
I wish I could tell you I tried it already, but not yet.
I too think you're going to be better off going to it.
A truck(stock), typically won't ever see revs past 5500-5900 anyway.
While some LS1 and many LS6 manifolds run at or above 6500 rpm.
I wish I could tell you I tried it already, but not yet.
I too think you're going to be better off going to it.
