L92 Numbers Plus Plan B - pics included
02-20-2007, 02:03 PM
#1
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403 L92 Numbers Plus Plan B - pics included
Here are the numbers on my 402 L92. This my original configuration.
SDPC LS2 402 2cc pistons
L92 heads - 12:1 SCR 8.9 DCR (untouched)
L76 Intake
Comp 921's
Bret Bauer (Bauer Racing Engines) custom cam spec'd for my setup
RAM Dual disc clutch and Aluminum Flywheel
American Racing 1 7/8 headers
42 lb Green Top injectors
Revised Cadillac Racing lifters - Good for 8k RPM
Trend .110 Pushrods.
etc
etc
Assembly/Installation and SD tune by Phil Thomas aka PHIL97SVT
It's been too cold/icey/snowy/wet to drive the car so I decided to take it to the next level. Ed Hutchings of Automotive Technologies in Chesapeake Va is handling the next round and picked the car up on Saturday.
The car runs incredibly strong. I think that's probably due to 375 RWT at 2200 RPM. I just got the numbers about 30 minutes ago.
Maybe Ed Hutchings of Automotive Technologies can chime in here on the dyno methodology. I know there's been some issues lately.
The cam has A LOT of overlap and but idles perfectly and drives very well.
We're going to be doing Plan B this week. WCCH Stage 2 L92 CNC'd heads with a 234-240 XE-R 112 +0 cam. This is a cam that Richard and I agreed on for his CNC'd heads. Now that we have a base line with the current setup, Ed is going to install the cam and dyno with the untouched heads. Then he is going to install the WCCH heads and dyno again so we'll have good before and after head numbers.
Stay tuned.
SDPC LS2 402 2cc pistons
L92 heads - 12:1 SCR 8.9 DCR (untouched)
L76 Intake
Comp 921's
Bret Bauer (Bauer Racing Engines) custom cam spec'd for my setup
RAM Dual disc clutch and Aluminum Flywheel
American Racing 1 7/8 headers
42 lb Green Top injectors
Revised Cadillac Racing lifters - Good for 8k RPM
Trend .110 Pushrods.
etc
etc
Assembly/Installation and SD tune by Phil Thomas aka PHIL97SVT
It's been too cold/icey/snowy/wet to drive the car so I decided to take it to the next level. Ed Hutchings of Automotive Technologies in Chesapeake Va is handling the next round and picked the car up on Saturday.
The car runs incredibly strong. I think that's probably due to 375 RWT at 2200 RPM. I just got the numbers about 30 minutes ago.
Maybe Ed Hutchings of Automotive Technologies can chime in here on the dyno methodology. I know there's been some issues lately.
The cam has A LOT of overlap and but idles perfectly and drives very well.
We're going to be doing Plan B this week. WCCH Stage 2 L92 CNC'd heads with a 234-240 XE-R 112 +0 cam. This is a cam that Richard and I agreed on for his CNC'd heads. Now that we have a base line with the current setup, Ed is going to install the cam and dyno with the untouched heads. Then he is going to install the WCCH heads and dyno again so we'll have good before and after head numbers.
Stay tuned.
Last edited by WKMCD; 02-21-2007 at 07:34 AM.
02-20-2007, 02:13 PM
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I can't see the graphs from work, but 375 Ft/Lbs @ 2200 RPM sounds f-ing awesome. Can't wait to get home and check it out.
Can't wait for the after numbers
02-20-2007, 03:04 PM
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02-20-2007, 06:05 PM
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02-20-2007, 06:36 PM
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If Bret doesn't want the specs out, I understand, but I'm curious, what's the specs on the cam that's in there now?? I would have thought peak power to be a bit more than what's represented on the graph.
That thing has GOT to be insanely driveable though looking at that graph.
That thing has GOT to be insanely driveable though looking at that graph.
02-20-2007, 06:52 PM
#11
Melting Slicks
If Bret doesn't want the specs out, I understand, but I'm curious, what's the specs on the cam that's in there now?? I would have thought peak power to be a bit more than what's represented on the graph.
That thing has GOT to be insanely driveable though looking at that graph.
That thing has GOT to be insanely driveable though looking at that graph.
The reason for this little experiment is, as you stated, seems kinda low.
But remember, this is thru cats, with a belt driven water pump, both worth a few #s.
02-20-2007, 06:58 PM
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02-20-2007, 07:00 PM
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02-20-2007, 07:23 PM
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02-20-2007, 07:36 PM
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I can attest to the torque, it is flat out a beast to drive. It will spin them at will...
Looks good for Saturday...
Peace
Chip
Looks good for Saturday...
Peace
Chip
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02-20-2007, 07:37 PM
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Excellent numbers so far. Good luck with the tweaking and hope you see a nice gain.
02-21-2007, 06:44 AM
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This from a PM I got from Richard at West Coast Cylinder Heads last night.
"On a 4.03" test bore I saw a peak flow of 347@.650" lift. The exhaust ports peaked flow at .700" lift and flowed 244.7cfm without a test pipe. The intake runner is still relatively small in volume compared to the stock runner size. The Stage 2 intake runners are 268cc (stock is 257-260"
The amazing thing about these numbers is that the untouched exhaust runner only flows in the area a 190CFM. That's the weakness of the stock heads. This should fix that! I'll post up full flow numbers when I get them.
The heads are being overnighted to Automotive Technologies. Ed should have them this morning.
More is coming!
"On a 4.03" test bore I saw a peak flow of 347@.650" lift. The exhaust ports peaked flow at .700" lift and flowed 244.7cfm without a test pipe. The intake runner is still relatively small in volume compared to the stock runner size. The Stage 2 intake runners are 268cc (stock is 257-260"
The amazing thing about these numbers is that the untouched exhaust runner only flows in the area a 190CFM. That's the weakness of the stock heads. This should fix that! I'll post up full flow numbers when I get them.
The heads are being overnighted to Automotive Technologies. Ed should have them this morning.
More is coming!
