L92 Cam

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Sep 22, 2010 | 12:06 PM

DWillTA

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From: Fairmont, WV

L92 Cam

Would a 228LSK/240XER 114+2 be a good cam choice for a 408. Would be out of the box L92 (milled for DCR,SCR), unported L76/LS3 intake, 1 7/8 headers w/ full 3" dual exhaust w/ tru-x, and 90mm throttle-body. SD tune mafless.

Depending on how the short block comes out, I will be running around 11.5 scr, 8.6 to 8.8 dcr.

Would this setup work with the picky L92 top end?

Thanks

Sep 22, 2010 | 01:19 PM

1lejohn

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From: Pasadena Texas

Thats a very similar set up to mine. Is that cam specfic for the 92 heads or not? My cam has a little more duration and its +3. The exhaust, intake and t-body are the same that I am running. I went with a 85mm MAF meter its alittle more forgiving on the street and for different weather conditions. Buy the best springs that you can afford. I went with the rebuilt stock 92 rocker arms. The car really pulls hard from 3500- 7000 rpm

Sep 22, 2010 | 02:07 PM

MikeZ06402

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I run a 224/236 .612/.612 117.5 and I really enjoy it; I believe the lobes are XER. My tune is SD as well. Has great manners and pulls all the way to redline with lots of area under the curve.

Sep 22, 2010 | 04:19 PM

mike c.

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From: mi

get with Pat G for a cam on the l92 heads. He did mine and it made a improvement over the other's i had.

Sep 22, 2010 | 04:43 PM

Wnts2Go10O

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From: Rockville, MD

i was thinking of doing a cam with a lazy intake opening, quick closing, to get velocity up and use an X-ER lobe on the exhaust

Sep 22, 2010 | 05:26 PM

DWillTA

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From: Fairmont, WV

The valve events & overlap favor the L92 heads. I was just curious if I am reinventing the wheel or actually had a decent idea.

Cam Specs:
0.006 0.050 0.200
Intake Duration - ID (first number) 277 228 153
Exhaust Duration - ED (second number) 289 240 161
Lobe Center Angle - LCA (also known as LSA) 114 114 114
Intake Centerline - ICL 112 112 112

Intake Valve opens - IVO 26.5 2 -35.5 BTDC (- indicates ATDC)
Intake Valve closes - IVC 70.5 46 8.5 ABDC
Exhaust Valve Opens - EVO 80.5 56 16.5 BBDC
Exhaust Valve Closes - EVC 28.5 4 -35.5 ATDC (- indicates BTDC)
Exhaust Centerline - ECL 116 116 116
Overlap 55 6 -71 degrees

Bore 4.03
ST = Stroke 4
RL = Rod Length 6.125
Number of cylinders 8
Deck Height (how much pistons come out of the hole) -0.013
Piston Dome or Dish (- for a dome + for a dish) 4
Compressed Head gasket thickness 0.051
Cylinder Head Chamber Volume 70

Static Compression Ratio 11.20 :1
Dynamic Compresion Ratio 8.56 :1
Rod to Stroke Ratio 1.53 :1
Bore to Stroke Ratio 1.01 :1

Sep 22, 2010 | 05:32 PM

DWillTA

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Launching!

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From: Fairmont, WV

I can sacrifice some torque down low. With the 4.30's and the cam only LS1 I have limited traction in 1st & 2nd. Still on the stock clutch (87,000 miles) so when that gets replaced at same time traction will be the limiting factor.

My goals are 500 rwhp(+/- 20hp) & 475 lb/ft torque. I would like to have 300+ lb/ft on tap from 2500 rpm up. Just trying to take advantage of my low gear and more cubes.

Dave