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If the heads are swapped in favor of L92's will the L76 intake work with the accesories on an 03 SS? Looking at doing the swap but dont want to run the carb style intake and have read that the truck L92 intake is only good to about 5400 rpm. Any input would be greatly appreciated so i dont end up buying parts that wont work. thanks in advance Mario
You do have a 6L or larger engine, correct? 4" or larger cylinder bores?
Yes the ngine is an lq9 on my 03 SS. But I have heard the car intakes dont work and was wondering if that L76 would.
that being said then yes the L76 intake is the way to go on your LQ9 if you swap to the L92 heads. that will make a mean little combo for the money spent for sure. good luck keep us posted.
Will do
water pump outlet- the L92 truck water pump might fit??
DBW throttle body interferance
Cluth fan interferance
3 bolt to 4 bolt throttle body swap and associated changes in connections
Fuel lines will need to be modfyied for intake and regulator
@SSS.com there is a guy putting together a working set up, he is not done yet.
I am interested in your results too!
Is that true about the RPM's on that intake?
<div class='quotetop'>QUOTE(shwarmy @ Apr 12 2007, 08:19 AM) [snapback]89690[/snapback]</div>does seem super low huh? thats weird, and would probably keep me from switching to it if so. :nutz:Quote:
Is that true about the RPM's on that intake?
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<div class='quotetop'>QUOTE(Detroitjoe @ Apr 12 2007, 08:05 AM) [snapback]89665[/snapback]</div>i heard that you have to change the waterpump on the trucks. there is an aftermarket pump that will work.Quote:
water pump outlet- the L92 truck water pump might fit??
DBW throttle body interferance
Cluth fan interferance
3 bolt to 4 bolt throttle body swap and associated changes in connections
Fuel lines will need to be modfyied for intake and regulator
@SSS.com there is a guy putting together a working set up, he is not done yet.
I am interested in your results too!
[/b]
jamest
there is thread on ls1tech about the flow subject with comparisons between the l92 and l76 i beleive done by rich at wcch. it showed the truck intake running out of breath really early and causing a restriction to the head. if i remember correctly they flowed the head by itself and then with the 2 intakes to show the diffrence. I saw another thread by zippy about the water pump subject and asked for the gm part number it appeared to be a new body style truck pump. will post if i get it. thanks mario
there is thread on ls1tech about the flow subject with comparisons between the l92 and l76 i beleive done by rich at wcch. it showed the truck intake running out of breath really early and causing a restriction to the head. if i remember correctly they flowed the head by itself and then with the 2 intakes to show the diffrence. I saw another thread by zippy about the water pump subject and asked for the gm part number it appeared to be a new body style truck pump. will post if i get it. thanks mario
You are going to hurt yourself with those heads, they're good to 7500rpm easily and you're going to kill port velocity as well as shroud the chamber. Sound good still?
The 4" bore is NOT NEARLY large enough to support those heads. They're basically modern tunnel ports. Think of a boss 302... good at 7500rpm, lame from idle to 3500 (where you drive most of the time, right?).
Unless the vehicle is a weekend warrior or dedicated drag vehicle, stick with cleaning up the 317s on there currently. They'll allow for around 275-300cfm @ 0.550" lift... that's huge AND still retain massive port velocity. Also, you'll then have no install issues.
thanks for the other side, I want somethng new so bad I wont look at possible short comings. So hitman you are saying better results on a 6.0L will be had with some work on stock heads and a good cam??
I am calling the truck intake the restrictor intake b/c of how bad it flows, Richard said this could be by design to keep the 6.2 engines alive and not warranty them once guys start spinning above 6k.
<div class='quotetop'>QUOTE(Detroitjoe @ Apr 25 2007, 08:57 AM) [snapback]91338[/snapback]</div>Quote:
thanks for the other side, I want somethng new so bad I wont look at possible short comings. So hitman you are saying better results on a 6.0L will be had with some work on stock heads and a good cam??
I am calling the truck intake the restrictor intake b/c of how bad it flows, Richard said this could be by design to keep the 6.2 engines alive and not warranty them once guys start spinning above 6k. [/b]
Yes, the 6.0 heads are setup for that motor. Higher port velocity, correct valve size, etc.
I'd like to see someone cut that intake open and see how and where the restriction is at...