L92 combos?
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From: Rocky Mtn thin air & snow...
L92 combos? I'm hoping to find out what kinds of combinations that others are using in their L92-head combos. (And yes, I have searched, but it doesn't seem like there's been a whole lot of discussion on this yet.)
My own combination is probably going to be fairly mellow to begin with, with a stock LQx bottom-end (unless I can somehow swing the cash for a stroker) & the L76 intake. The rest of the combo will be a T-56, moderate gears (say 3.73s), & probably stock exh. manifolds, as I just can't justify $800 for a set of headers.
I was thinking of something along the lines of the CheaTR cam, or maybe just a little bit bigger, but with the same kind of split. Would like to hear what others have to say.
Thanks guys.
My own combination is probably going to be fairly mellow to begin with, with a stock LQx bottom-end (unless I can somehow swing the cash for a stroker) & the L76 intake. The rest of the combo will be a T-56, moderate gears (say 3.73s), & probably stock exh. manifolds, as I just can't justify $800 for a set of headers.
I was thinking of something along the lines of the CheaTR cam, or maybe just a little bit bigger, but with the same kind of split. Would like to hear what others have to say.
Thanks guys.
414ci
lq4 for black bored .065 over with eagle crank and rods
l92 heads with export port work
l76 intake with holley 90mm tb
custom ground cam
60lbs inj
through a built t56 and a 9inch with 3.73's
no numbers yet still on the install stage im into re wiring the car (it was a v6) so not much fun yet builder thinks it will be putting down 560 guys on here seem to think i will be lucky to nip 520
lq4 for black bored .065 over with eagle crank and rods
l92 heads with export port work
l76 intake with holley 90mm tb
custom ground cam
60lbs inj
through a built t56 and a 9inch with 3.73's
no numbers yet still on the install stage im into re wiring the car (it was a v6) so not much fun yet builder thinks it will be putting down 560 guys on here seem to think i will be lucky to nip 520
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From: Rocky Mtn thin air & snow...
Thanks for the response. That sounds like a pretty fun combo... (You can bore the block out by 65 thou? And what do you mean by 'export port work'? Should that be "expert"?) Heck, I'd be happy with 520 HP, I'm trying to stay reasonable with mine, & just shooting for around 430, 450 or so. I know that the stock exh. manifolds are going to hurt my power levels some, but I already have a welder, so I might just fab up my own headers if it bugs me too much...
Anyone else?? I'm especially curious to hear what others have to say about picking a cam for the L92 heads. I was thinking of something along the lines of a 228/236 duration, .58x lift, on a 114-116 LSA. To my way of thinking, that would give me decent power, along with not too much valvetrain stress, reasonable driveability & at least some chance of passing emissions...
The only problem I have is that I know the "traditional" SBC a lot better than the new Gen-III/IV engines, so what applies to the old stuff might throw me a curve with the new engines... Thanks again.
Anyone else?? I'm especially curious to hear what others have to say about picking a cam for the L92 heads. I was thinking of something along the lines of a 228/236 duration, .58x lift, on a 114-116 LSA. To my way of thinking, that would give me decent power, along with not too much valvetrain stress, reasonable driveability & at least some chance of passing emissions...
The only problem I have is that I know the "traditional" SBC a lot better than the new Gen-III/IV engines, so what applies to the old stuff might throw me a curve with the new engines... Thanks again.
Last edited by V8Rumble; Nov 27, 2007 at 04:28 PM.
i am piecing together something like this:
stock '00 lq4 block, crank, and rods
diamond +10 cc dome pistons with reliefs cut for L92 heads (aiming for 12:1)
tsp ported L92 heads with the hollow intake valves
gmpp L92 carbed intake with ls7 injectors
25x/26x cam on a 108+0 lsa .6xx/.6xx lift on lsk lobes
2 stage plate setup totaling <200whp
manual steering rack, ewp, and udp
i'm looking for 500 whp through an unlocked stall and th350 on motor
engine will be ran on e85, as stations carrying it are popping up all over the place here
stock '00 lq4 block, crank, and rods
diamond +10 cc dome pistons with reliefs cut for L92 heads (aiming for 12:1)
tsp ported L92 heads with the hollow intake valves
gmpp L92 carbed intake with ls7 injectors
25x/26x cam on a 108+0 lsa .6xx/.6xx lift on lsk lobes
2 stage plate setup totaling <200whp
manual steering rack, ewp, and udp
i'm looking for 500 whp through an unlocked stall and th350 on motor
engine will be ran on e85, as stations carrying it are popping up all over the place here
Ls2 402
2cc pistons
Livernois stage 3 L92 heads
L76 intake
kooks 1 7/8's catted y
M6/12 bolt w 4.11s
251/255 61x/66x 113 (lsx/lsk lobes)
125 wet
Made 489 n/a... stopped climbing at 6100. Intake isssues...
2cc pistons
Livernois stage 3 L92 heads
L76 intake
kooks 1 7/8's catted y
M6/12 bolt w 4.11s
251/255 61x/66x 113 (lsx/lsk lobes)
125 wet
Made 489 n/a... stopped climbing at 6100. Intake isssues...
370 ci
Scat i beams
Mahle pistons -4cc
stock l92 heads milled .030"
stock L76 intake
FAST 90mm
green tops
cam in sig has too much ovelap IMO now after the fact and i think i am going to do 234/240 114+? my cam now has beastly mid range power and seems to be lacking a bit up top. i am want something more driveable and to peak around 6700-6800 so i am not too sure yet. i know i want 10-12* max of overlap compared to my 22* now since i DD her.
Scat i beams
Mahle pistons -4cc
stock l92 heads milled .030"
stock L76 intake
FAST 90mm
green tops
cam in sig has too much ovelap IMO now after the fact and i think i am going to do 234/240 114+? my cam now has beastly mid range power and seems to be lacking a bit up top. i am want something more driveable and to peak around 6700-6800 so i am not too sure yet. i know i want 10-12* max of overlap compared to my 22* now since i DD her.
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Thanks for the response. That sounds like a pretty fun combo... (You can bore the block out by 65 thou? And what do you mean by 'export port work'? Should that be "expert"?) Heck, I'd be happy with 520 HP, I'm trying to stay reasonable with mine, & just shooting for around 430, 450 or so. I know that the stock exh. manifolds are going to hurt my power levels some, but I already have a welder, so I might just fab up my own headers if it bugs me too much...
Anyone else?? I'm especially curious to hear what others have to say about picking a cam for the L92 heads. I was thinking of something along the lines of a 228/236 duration, .58x lift, on a 114-116 LSA. To my way of thinking, that would give me decent power, along with not too much valvetrain stress, reasonable driveability & at least some chance of passing emissions...
The only problem I have is that I know the "traditional" SBC a lot better than the new Gen-III/IV engines, so what applies to the old stuff might throw me a curve with the new engines... Thanks again.
Anyone else?? I'm especially curious to hear what others have to say about picking a cam for the L92 heads. I was thinking of something along the lines of a 228/236 duration, .58x lift, on a 114-116 LSA. To my way of thinking, that would give me decent power, along with not too much valvetrain stress, reasonable driveability & at least some chance of passing emissions...
The only problem I have is that I know the "traditional" SBC a lot better than the new Gen-III/IV engines, so what applies to the old stuff might throw me a curve with the new engines... Thanks again.
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From: Rocky Mtn thin air & snow...
Thanks for the responses guys. You guys are running some healthy freakin' cams, makes me wish I lived closer to some of ya so that I could experience it for myself! 
66deuce, I'd tend to agree. This car is my "fair-weather weekend toy", but I still see some traffic while in it, so driveability is a factor. Still thinking about that CheaTR cam...
66deuce, I'd tend to agree. This car is my "fair-weather weekend toy", but I still see some traffic while in it, so driveability is a factor. Still thinking about that CheaTR cam...
i always hear about ptv clearence being a big thing, so those that posted
your c/r's + how much you milled the heads and headgasket thickness if possible please.
trying to pick out a cam
your c/r's + how much you milled the heads and headgasket thickness if possible please.
trying to pick out a cam
L92s are definately pretty popular right now! We've made over 20rwhp gains from the stock l92 head to our PRC CNC Ported L92 heads! Not bad for a head costing just over $1000 for the pair! The PRC cnc ported heads cost similar to stock heads & flow nearly 50cfm over a stock head & 15cfm over the GM CNC head!
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
My combo for this coming spring:
387ci All-bore LS1
236/236 .595"/.595" 112lsa
DIY Ported L92's, decked .030", REV SS valves
Patriot Gold Springs
Ported L76
SVO 36lb inj.
NW or PTM 90mm TB
1-3/4" Longtube Grots
11.6:1 compression
I'm predicting around 480-500rwhp (dyonjet #'s).
387ci All-bore LS1
236/236 .595"/.595" 112lsa
DIY Ported L92's, decked .030", REV SS valves
Patriot Gold Springs
Ported L76
SVO 36lb inj.
NW or PTM 90mm TB
1-3/4" Longtube Grots
11.6:1 compression
I'm predicting around 480-500rwhp (dyonjet #'s).
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From: Rocky Mtn thin air & snow...
OK, thanks guys, that gives me some kind of idea. Two more questions now, if I could:
1) What do you like about your current setup (especially the cam!), & what would you do differently (& why)? (I'm hoping that this thread may become a resource for others with similar questions.)
2) For myself, I'm thinking of a cam that'd be fairly similar to one or two of the blower cams from one of the vendors here - something along the lines of
222/228 - .566/.571 - 114 LSA
or
224/232 - .581/.595 - 114 LSA
Now I know that I'd be leaving a lot of power on the table, but I have to take into consideration the fact that I may need to pass emissions with this engine. Based on what I've said above, how would you expect either of these cams to work with my setup?
Thanks guys.
1) What do you like about your current setup (especially the cam!), & what would you do differently (& why)? (I'm hoping that this thread may become a resource for others with similar questions.)
2) For myself, I'm thinking of a cam that'd be fairly similar to one or two of the blower cams from one of the vendors here - something along the lines of
222/228 - .566/.571 - 114 LSA
or
224/232 - .581/.595 - 114 LSA
Now I know that I'd be leaving a lot of power on the table, but I have to take into consideration the fact that I may need to pass emissions with this engine. Based on what I've said above, how would you expect either of these cams to work with my setup?
Thanks guys.
i am piecing together something like this:
stock '00 lq4 block, crank, and rods
diamond +10 cc dome pistons with reliefs cut for L92 heads (aiming for 12:1)
tsp ported L92 heads with the hollow intake valves
gmpp L92 carbed intake with ls7 injectors
25x/26x cam on a 108+0 lsa .6xx/.6xx lift on lsk lobes
2 stage plate setup totaling <200whp
manual steering rack, ewp, and udp
i'm looking for 500 whp through an unlocked stall and th350 on motor
engine will be ran on e85, as stations carrying it are popping up all over the place here
stock '00 lq4 block, crank, and rods
diamond +10 cc dome pistons with reliefs cut for L92 heads (aiming for 12:1)
tsp ported L92 heads with the hollow intake valves
gmpp L92 carbed intake with ls7 injectors
25x/26x cam on a 108+0 lsa .6xx/.6xx lift on lsk lobes
2 stage plate setup totaling <200whp
manual steering rack, ewp, and udp
i'm looking for 500 whp through an unlocked stall and th350 on motor
engine will be ran on e85, as stations carrying it are popping up all over the place here
time to do some reasearch, e85 is iirc is over 100 octane. my friend converted his turbo car over to e85 did all the tuning himself and it actually made a little more power switching over
i stand corrected it is 104-105, looking into it 2.79 for e85 plus 30% = $3.62/gallon ill stick with sunoco 94 for $3.35 will still be great for 12.1 SCR in an NA application. didnt mean to highjack the thread that just raised my interest. im going with an eric koening 408 with the l92 cnc package cam still undecided if you look at tsp's 418 l92 cams they are making crazy power with tons of overlap on a 111+2 combo pulling strong to 6600. The intake isnt falling on it face and it is an out of the box l72, there heads however over 50cfm more than an out of the box l92.
Last edited by kistlerjm9; Dec 4, 2007 at 06:59 PM.