LQ4 Build
09-21-2010, 11:22 PM
#1
LQ4 Build Going to be building and collecting parts for a lq4 build this fall/winter and looking to get some input.
Goal is to get the stock compression up to 10.5 and run the motor on 91 octane seeing as this is the highest available grade around town.
Ive been told that with a set of l92 heads I could get the compression up to about 10.5(my goal to get to) by milling the heads .30 with a .40 head gaskets?
I was looking into the victor jr intake over the GM one. I was told that the Victor jr intake can be a little much and they turn up at higher rpms with a lq4 and that I should make sure that I get a good cam specd for my needs.
anyone running this edelbrock intake with a stock bottom lq4? Any complaints, issues?
If I run with the l92 heads should I port them as well as the intake? Or really no need and they flow just fine as is?
I'm wanting to make around 420-450 to the wheels N/A
LQ4- Stock bottom
L92 Heads milled .30
edelbrock Victor Jr. intake
Holley 750 carb
long tube headers
ls2 timing chain
ported oil pump
All ARP hardware
Just some things I have in mind
Goal is to get the stock compression up to 10.5 and run the motor on 91 octane seeing as this is the highest available grade around town.
Ive been told that with a set of l92 heads I could get the compression up to about 10.5(my goal to get to) by milling the heads .30 with a .40 head gaskets?
I was looking into the victor jr intake over the GM one. I was told that the Victor jr intake can be a little much and they turn up at higher rpms with a lq4 and that I should make sure that I get a good cam specd for my needs.
anyone running this edelbrock intake with a stock bottom lq4? Any complaints, issues?
If I run with the l92 heads should I port them as well as the intake? Or really no need and they flow just fine as is?
I'm wanting to make around 420-450 to the wheels N/A
LQ4- Stock bottom
L92 Heads milled .30
edelbrock Victor Jr. intake
Holley 750 carb
long tube headers
ls2 timing chain
ported oil pump
All ARP hardware
Just some things I have in mind
09-22-2010, 11:31 AM
#3
i would suggest using a cathedral port 234/799 head instead to reach your goal with matched cam and supporting parts.
i prefer to use the super victor over the jr. if possible.
i dont think there any super victor type intakes for rectangle port heads as of now.
i prefer to use the super victor over the jr. if possible.
i dont think there any super victor type intakes for rectangle port heads as of now.
09-22-2010, 06:46 PM
#4
Looking a little more into 243's with an lq4.
Came into this though.
Came into this though.
As I have said before, L92s stock, straight from the GM factory, are comparable to high-end, CNC'd 243 heads. You can make similar power numbers with either head style in a h/c setup. Wit the L92s, the stock L76 intake when ported makes the same power and torque as a FAST but will make your engine make peak hp at about 6300, damn near every time. If you want the extra few hundred rpms, FAST your little heart out.
A lot of people **** on L92s because they flow so much, and they say that they aren't good on a 6.0. Someone will probably come in this thread and say it. They do outflow 243s by using much bigger intake ports. But remember how I said 243/L92 setups tend to make similar power? Well, L92s love small cams. There are many, many people making 450rwhp+ on small 22x/23x cams, myself included, with unported L92 heads. Because you can use a smaller cam than the 243s to make the same power, the L92 setups tend to actually have better low end and better torque curves than larger-cammed 243 setups.
L92s
-no need to port to make good power (but there is a good chunk of power in milling the heads to get compression up a little, and smart porting does help make even more power) so you save money. If you want, buy a set, +springs/valves, mill .030, bolt on. 450rwhp
-no need to buy a FAST to make good power, saving you money.
-smaller cams to make good power, resulting in better street manners and more torque down low.
-similar power between typical 243/L92 setups
243s
-there is some seriously awesome top-shelf stuff, if you have the money to spend.
-in full-tilt, ***** deep, "AFR this, ETP that" h/c setups, I usually see higher peak hp and torque than the typical stock L92 setup. but the extra power is there if you want it (ex: my friend who made 508rwhp using WCCH L92s and a VA Speed cam on his 6.0 GTO)
-you can keep your own heads and just drop them off at a machine shop to be ported. cheaper/less power, but maybe thats all you need
-you need a FAST to have an effective 243 setup
-Beach Goat
Via www.ls1gto.com/forums
A lot of people **** on L92s because they flow so much, and they say that they aren't good on a 6.0. Someone will probably come in this thread and say it. They do outflow 243s by using much bigger intake ports. But remember how I said 243/L92 setups tend to make similar power? Well, L92s love small cams. There are many, many people making 450rwhp+ on small 22x/23x cams, myself included, with unported L92 heads. Because you can use a smaller cam than the 243s to make the same power, the L92 setups tend to actually have better low end and better torque curves than larger-cammed 243 setups.
L92s
-no need to port to make good power (but there is a good chunk of power in milling the heads to get compression up a little, and smart porting does help make even more power) so you save money. If you want, buy a set, +springs/valves, mill .030, bolt on. 450rwhp
-no need to buy a FAST to make good power, saving you money.
-smaller cams to make good power, resulting in better street manners and more torque down low.
-similar power between typical 243/L92 setups
243s
-there is some seriously awesome top-shelf stuff, if you have the money to spend.
-in full-tilt, ***** deep, "AFR this, ETP that" h/c setups, I usually see higher peak hp and torque than the typical stock L92 setup. but the extra power is there if you want it (ex: my friend who made 508rwhp using WCCH L92s and a VA Speed cam on his 6.0 GTO)
-you can keep your own heads and just drop them off at a machine shop to be ported. cheaper/less power, but maybe thats all you need
-you need a FAST to have an effective 243 setup
-Beach Goat
Via www.ls1gto.com/forums
09-22-2010, 09:19 PM
#6
lol,
I'm also not wanting to run with that big of a cam though, something nice for street manners.
who are some of the more prefered sponsors on here that could set me up with heads and cam if it be I for l92 or 243's?
Gotta decide before I order a intake.
I'm also not wanting to run with that big of a cam though, something nice for street manners.
who are some of the more prefered sponsors on here that could set me up with heads and cam if it be I for l92 or 243's?
Gotta decide before I order a intake.
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09-23-2010, 11:01 AM
#8
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tsp heads are a good value if your going brand new and a cam from pat g ... im doing the same basic build and im going with a set of ported 5.3 heads to bump up the compression and a cam from pat g to get my 500hp im looking for. You wont ever see me use patriot or pro comp heads on any of my stuff.
09-24-2010, 11:13 AM
#10
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I have been there and done it with this combo, take a look at this and you will see the killer results https://ls1tech.com/forums/generatio...am-10-80s.html .
The L92's are the cheap ticket and you can grow with them. There is only so much you can get out of 243/799/317's. These results are before the Vic Jr was out for L92's, so the numbers are on the gm manifold. The Vic would have been worth at least another .10 off the et. If you need any help let me know.
The L92's are the cheap ticket and you can grow with them. There is only so much you can get out of 243/799/317's. These results are before the Vic Jr was out for L92's, so the numbers are on the gm manifold. The Vic would have been worth at least another .10 off the et. If you need any help let me know.
