help with intake selection
help with intake selection can anyone tell me what other intakes will work on an 07 LQ9 engine so it will fit under the hood of a 67 firebird? are there other problems that changing the intake is going to cause i.e. acc. no longer fitting right, special instructions for tuning? i do not intend to do a cam swap or anything else to the engine that i do not have to do. thanks Tim
can anyone tell me what other intakes will work on an 07 LQ9 engine so it will fit under the hood of a 67 firebird? are there other problems that changing the intake is going to cause i.e. acc. no longer fitting right, special instructions for tuning? i do not intend to do a cam swap or anything else to the engine that i do not have to do. thanks Tim
Ls3 intake won't fit cathedral port heads. It's pretty common for guys to use LS1, LS2, and ideally a LS6 intake. The ls2 is slightly better than an LS1, but it is a 90mm throttle body, so you'd have to either get a new throttle body, or an adapter. They'll all bolt right to your heads, but you'll have to modify your water pumps neck and relocate a pulley. Look at many of the other builds in here and you'll get a good idea.
Ls3 intake won't fit cathedral port heads. It's pretty common for guys to use LS1, LS2, and ideally a LS6 intake. The ls2 is slightly better than an LS1, but it is a 90mm throttle body, so you'd have to either get a new throttle body, or an adapter. They'll all bolt right to your heads, but you'll have to modify your water pumps neck and relocate a pulley. Look at many of the other builds in here and you'll get a good idea.
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thanks for the help guys, so i take it the ls6 intake throttle body is the propper size, since you said the ls2 was 90mm and had to be replaced? and to USMCz28 semper-fi is nastyz28 a website or something to use for the search here? thanks again Tim
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LS1 and LS6 are 78mm 3 bolt flange, the LS2, LS3 and newer stuff is 90mm 4 bolt flange. All 90mm GM factory stuff is DBW, so you either have to get an aftermarket throttle body, adapt it to an earlier style TB, or if you plan on running a DBW ECM and harness, you can probably get a factory LS2/LS3 TB to work with few problems.
I was going to use an LS2 TB on my current project (LQ4 short block/L92 heads [square port]/LS3 intake) because I thought I had a DBW ECM and harness, but once I realized I has an old ~2000 f-body harness I made the decision to get an aftermarket cable style 90mm throttle body and keep it simple. If you have the pedal, TAC module and DBW harness and ECM already, an LS2 intake (the only GM intake that is 90mm and cathedral ported) with a DBW 90mm throttle body would be a pretty slick setup. Especially since LS2 intakes and throttle bodies are pretty cheap second hand.
I'm not 100% on how well a truck ECM/TAC would work with say a LS2 throttle body, but I couldn't imagine it's that hard to make work. If it's just a new connector, then that would be a pretty easy thing to switch.
I was going to use an LS2 TB on my current project (LQ4 short block/L92 heads [square port]/LS3 intake) because I thought I had a DBW ECM and harness, but once I realized I has an old ~2000 f-body harness I made the decision to get an aftermarket cable style 90mm throttle body and keep it simple. If you have the pedal, TAC module and DBW harness and ECM already, an LS2 intake (the only GM intake that is 90mm and cathedral ported) with a DBW 90mm throttle body would be a pretty slick setup. Especially since LS2 intakes and throttle bodies are pretty cheap second hand.
I'm not 100% on how well a truck ECM/TAC would work with say a LS2 throttle body, but I couldn't imagine it's that hard to make work. If it's just a new connector, then that would be a pretty easy thing to switch.
