LQ9 + L92 heads?
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Joined: Jun 2008
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LQ9 + L92 heads? heres the deal,
I have an LQ9 engine with a custom grind 226/232 @.050, 112+4 LSA, .605/.610 lift, also has Long tube headers and true duals, cold air intake, and still running a truck manifold.
What kind of gains could i expect to see if i slapped a set of L92 heads + L76 intake on top of this engine?
I've seen the magazine articles testing simlar combos, but looking for some other advice/ experience...
This is in a truck, so low end torque is a concern.
How much low end will the L92's sacrifice, and how much would it pick up on the top end?
Would L92 heads be worth it or would i be better off just sticking with the 317 heads, and maybe picking up an ls6 manifold?
thanks in advance.
I have an LQ9 engine with a custom grind 226/232 @.050, 112+4 LSA, .605/.610 lift, also has Long tube headers and true duals, cold air intake, and still running a truck manifold.
What kind of gains could i expect to see if i slapped a set of L92 heads + L76 intake on top of this engine?
I've seen the magazine articles testing simlar combos, but looking for some other advice/ experience...
This is in a truck, so low end torque is a concern.
How much low end will the L92's sacrifice, and how much would it pick up on the top end?
Would L92 heads be worth it or would i be better off just sticking with the 317 heads, and maybe picking up an ls6 manifold?
thanks in advance.
http://www.silveradoss.com/forums/in...howtopic=44004
here is my LQ9 buildup no track numbers yet. I like it
here is my LQ9 buildup no track numbers yet. I like it
Good to see someone besides me building a 6.0 l92 motor. I have called some of the sponsors about a cam for my build and they all laughed at me. I'm glad to see this. I'll be posting my buildup in the next few days about my 6.0/l92 truck. S10 that is. Maybe we'll both prove something....
We went 5.82@119 with a GT47-88 turbo at 10psi with a stock LQ4 bottom end, 236/240 .600 lift camshaft and outta the box L92s at 3200lbs in a "s10". So I'd say theres some laughing going on.
Do you have any vids of that setup? What does the rest of the setup specs look like?
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The only vid is about 4.5 mins into this video against Shane Stack (redish colored monte carlo)
http://paulpattonproduction.blogspot...aws-april.html
Thats pretty much the motor setup, 96# injectors, stock ecu in speed density, powerglide, 9", cage, etc Pics of the build can be found here...
http://s254.photobucket.com/albums/h...ars/Isuzu-S10/
http://paulpattonproduction.blogspot...aws-april.html
Thats pretty much the motor setup, 96# injectors, stock ecu in speed density, powerglide, 9", cage, etc Pics of the build can be found here...
http://s254.photobucket.com/albums/h...ars/Isuzu-S10/
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Im also finnising up my 370 build in an s-10 . Iron block, stock crank, bme alum. rods, weisco pistons. Up top is a set of l92s hand ported and the gmpp carb intake,750 HP and i have not decided on my cam specs yet. This is an n2o motor that will see about 300-400
. In a 3250# truck with a glide and the right set up....I dare some poor unknowing SOB to laugh
Will get there feelings hurt by a lil motor..
BTW. be very carefull who you take cam advice from on these heads.. Some people are stupid!!!
. In a 3250# truck with a glide and the right set up....I dare some poor unknowing SOB to laugh Will get there feelings hurt by a lil motor..BTW. be very carefull who you take cam advice from on these heads.. Some people are stupid!!!
Last edited by LSXS10; Jun 12, 2008 at 11:20 AM.
L92's and 6.0L here running great with the Comp Cams XR281HR PN 54-428-11 (2200 rpm - 7200rpm)
intake 228@.050" 0.571" lift
exhaust 230@.050 0.573" lift
112 LSA
intake 228@.050" 0.571" lift
exhaust 230@.050 0.573" lift
112 LSA
Last edited by jay_lt4; Jun 12, 2008 at 04:39 PM.
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What kind of gains are to be had by just bolting on a set of L92's - onto that LQ9 with above mentioned comp cam 226/232 .604"/.609" 112+4...?
Looks like its just going to get an ls6 manifold for now and gather more info on the l92 top end..
i would like to throw in a set of katech or arp rod bolts and maybe a 150 shot as well, just for good measure.
Looks like its just going to get an ls6 manifold for now and gather more info on the l92 top end..
i would like to throw in a set of katech or arp rod bolts and maybe a 150 shot as well, just for good measure.
LSXS10, I know what you mean by advice on cams for this setup. Got one sponsor saying .610 lift is all you can do w/ this settup stock. Got another one trying to sell me a .650 lift cam. I'm running Diamond flattops flycut for L92s and from what diamond says I can clear .750.
If you want a set of heads for an all out setup I've got a set for you. All Pro cathedral ports. Setup for offset rockers ( hi rpm stability), comes with titanium intake and inconel exhaust valves. $2700 shipped to your door. Flow 355 on the intake and 260 on the exhaust
LSXS10, I know what you mean by advice on cams for this setup. Got one sponsor saying .610 lift is all you can do w/ this settup stock. Got another one trying to sell me a .650 lift cam. I'm running Diamond flattops flycut for L92s and from what diamond says I can clear .750.
... I told all three the exact specs on my motor "i just used TSPs l92 flow #s because i havent bought my heads yet " think ill just hand port my own and have them flowed..I was told any where from a 224/228 to a 240/248 for the EXACT same specs on a combo. Im just going to port my own heads and spec my own cam, run to Memphis and have comp cut it. Im thinking a 234/248 on a 109-112 lobe sep. for a 370 inch heavy n2o motor ,from what ive seen these heads dont need a ton of overlap but they do need a wide split to cover the weak "compared to the intake" exh. port . My combo may run like crap but all i can do is try something..Im more than willing to listen to anyones op. on the cam...The pros may know but there not tellin....
Thats what I did, I started my project back in October so there was even less info than there is now. I used 2 diferent dyno simulator software programs they were within 10-15 hp of each other (515-530 at the crank). I did my own port clean up, smoothed the high spots, port matched etc. I have not had it to the track or dyno yet but seat of the pats I can say that it has some serious torque and pulls great (I will need dr's now, good problem to have). I have shifted it at about 6600-6700 rpms and it liked it. I have done a lot of data logging and things are looking good. The cam specs are in my sig, I came up with these and had Comp grind it for me. The split is large but the exhaust needs it but the overalap is only 2 degrees. Idles about 800. may be able to go lower.
Last edited by 69LT1Bird; Jun 14, 2008 at 09:02 AM.
the way I was looking at it was pick a cam and run it and see how you like it, then if you need switch it up. It was like pulling teeth to get any consistency in the cams people were telling me to run.
TECH Apprentice
Joined: Jan 2008
Posts: 366
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From: Gladstone, Queensland, Australia
Thats BS. L92 heads come stock in VE SS commodores in Australia. LS2 block. L92 heads 6.0L. One cam only car has ran 10.8@123 mph with stock heads and 230s cam in a 3800 pound commodore.
SS_Enforcer has the world record with stock convertor/A6 with a 11.8@119mph. He has a 224/228 114+2 and WCCH stage 2 heads. Makes 325rwkw on dyno dynamnics.
SS_Enforcer has the world record with stock convertor/A6 with a 11.8@119mph. He has a 224/228 114+2 and WCCH stage 2 heads. Makes 325rwkw on dyno dynamnics.
