sleeperlqx

iTrader: (3)

After just killing a new R/T Challenger earlier this morning, makes me feel good about my combo and that Im in the right direction....I'm ready to update the top end even more. I put almost a full truck length on the lighter Challenger, while my trans was slipping, swaping that out this week though.

What is a good cam for my combo:

I need to know if the L92 heads like a bigger split, or a small split. I was thinking a 230/232 cam on a 113 or 112 lsa. Specs of my combo are in my sig. Not sure if this is going to be mild with my setup, or perfect. Being that I run 4.88s and 4K stall Im not needing lowend TQ cams. Truck is also a heavy Tahoe

I plan to get some used stock L92s, then mill, .015, or .020 off of the the heads. My LQ9 is flattops, so I know my compression should be near 11:1, I need to find a exact answer, but I know it will still be pump friendly. I know I need 8 off-set intake rockers as well as springs and shorter pushrods for the cam swap.

The intake I plan to use is the car intake, if I can swap that for a decent price. Im going to run atleast a 100mm TB, and upgrade to some bigger injectors too. But Edlebrock & FAST intakes are still on the table.

I have a video of how she runs with stock 317s, stock cam, stock intake & tb. But from the RPMS, you can see where a cam would shine. Converter is 4K and gears 4.88s. Tranny is also slipping like a SOB with 1000lbs of cargo in it.


Truck is just my street truck, used for fun, hauls passengers and tools, hardly never tows anything unless needed. But it did pull my Suburban 3000 brutal miles uphills without a breeze. Truck see mostly city, and lineups, some highway

skeet

iTrader: (18)

deffinitely heading in the right direction, as you know i run a FAST LSXr intake ( car style ) i milled my heads .015 with a .040 gasket running a 232/238 cam and a 235/239 cam and using 7.400 pushrods. you are more than half way there with the 4k stall and 4:88 gears, though my heads were cnced with the 232/238/609/612/113+1 cam ( the lift maybe switched ill have to check and make sure ) she ran well ( time in sig ) this was on pump gas at 11:1 compression. i cant speak of the car stock intake but heck give it a try!! maybe you'll run across a cheap fast one day

sleeperlqx

iTrader: (3)

Skeet I was hoping you chimed in too. Yea, its only right that I go with the L92 swap, as Im in search for more HP in the mid to upper range. While the heads are off, Ill mill them .015. 11:1 compressions sounds healthy. I was thinking the car intake help mid-top power too with the shorter runners.

Why the small split on your cams with the L92 topend? Im getting conflicting statements, some say big split only, then I see you have maybe 4-6 split. The 230/232 is appealing to me, just not sure if it needs more split.

yurs78

This is the best one that I've seen posted.

https://www.performancetrucks.net/fo...ild-up-470269/

LS2 with L92 heads makes 460rwhp/446rwtq - LS1TECH

Btw what are you going to do with the trans? Who's doing it and how "built" is it. Thanks.

Good luck and keep us posted.

skeet

iTrader: (18)

to much overlap will hurt the l92 heads, yes i know ive read that they liked alot of overlap ( big split durations ) there is a thing called over camming, ive talked to patrick g on a few occassions about the cam he sugguested, an with his experience in all the cam profiles he has reccomended over the years and now with the l92s i took his word for what he was telling me and ran with it, in the end i feel it performed well.

i still run the l92 heads and the cam i have now is a 25x/26x but its a nitrous fed cam which needs the valve events to open and close rapidly with the exhaust hanging open a tad longer


by the way you also have to take into concideration the rest of the build like how much air flow from the intake, how does the heads flow, and the exhaust! theres lots involved in trying to figure out the perfect cam

sleeperlqx

iTrader: (3)

thanks, good reads. I have a 4l80e transmission, plus another backup one, 4.88s on 32" tires, still playing with suspension right now.

thanks for the advice Skeet, I felt most comfortable with a tight split myself. 230/232 on a 113 lsa, car intake, air-aid CAI, 90mm or larger TB, LPP 1 3/4 primary longtubes, 3" collectors, 3" ORY catless, straight to 4" magnaflow 30" case SI/SO straight flow design, then dumped immediately 1 foot after the muffler. The trans is the 2WD 4l80e with 4000 rpm billet stall converter 9.5" dia, the gears are 4.88s with LSD, 10 bolt axle, and 32" tires. Wanting a fast NA truck, from the video you can see she moves good with the sliping trans, but the cam, and head swap is in plans for her while I freshen up what is accessible. But after this Im calling her completed, cause she hauls *** already.

skeet

iTrader: (18)

id hate to say but the headers maybe slightly choking you, id want at lease a 1 7/8ths, but thats me, didnt know you were 80e , nice choice on stall converter, i feel i over stalled mine now going back with a circle-d 4k 4c , those 32" tires? take it thats street tires on 20s ? 29 tall drag radial would be ****!! back to cam, id have to talk to a specialist to match the setup

sleeperlqx

iTrader: (3)

hmm interesting. im still keeping the headers, as im not chasing it all, but im thinking the fast intake with cable 102 TB sounds good... tranny 80e, yes geared up with 4.88s and 4k stall moves good. tires are 305/50/20s, street tires. So you are recommending me to get it speced? The truck is also a truck.

low2001gmc

iTrader: (137)

i am starting a similar build for my 72 nova now. going with that 223-231 cam, ls3 heads but ported truck intake. pat g has recommended the 223-231 113+4 and also the eps 226-234 113+4 so those were the cams i was searching for used and well i found me a 223-231. i say any one of those cams would be best with the 8 degree split to make up for the stock exhaust flow not able to keep up with the high intake flow. skeet has cnc'd heads and his exhaust flows better than ours so he can get away with less split duration. trucks are heavy and the torque numbers produced by the 223-231 you can see in the dyno graph would greatly help the heavy beast get a going and keep going...

BadSR71

iTrader: (2)

Awesome setup bro. I have an 02 tahoe with an LQ9 swap, .020" shaved #317's with TR224-114 and shorty headers. Runs like a champ but needs gears (stock 3.73's, it's a Z71) and more converter to really get it (it's currently got a yank TT2600 in it) or a shot of man sauce to get it to roll out quicker.