Another badazz L92 GTO
If you were to overlay the two graphs, you'd see that the smaller motor peaked at 65/6600, and the bigger motor peaked at about 6000. The limiting factor in the big motor, is the intake. The smaller motors aren't nearly as limited as the bigger ones, intake wise. So, don't let the comparison of peak HP numbers fool you. 540 with L92s and a L76 intake is pretty damn good. Besides, the difference in torque is huge. 60 ft pounds or better. At 3500, the difference is 100 ft pounds.
The cam in both are very similar, which would make it more radical in the smaller motor, than the larger. It is what would be considered middle of the road size wise.
The cam in both are very similar, which would make it more radical in the smaller motor, than the larger. It is what would be considered middle of the road size wise.
If you were to overlay the two graphs, you'd see that the smaller motor peaked at 65/6600, and the bigger motor peaked at about 6000. The limiting factor in the big motor, is the intake. The smaller motors aren't nearly as limited as the bigger ones, intake wise. So, don't let the comparison of peak HP numbers fool you. 540 with L92s and a L76 intake is pretty damn good. Besides, the difference in torque is huge. 60 ft pounds or better. At 3500, the difference is 100 ft pounds.
The cam in both are very similar, which would make it more radical in the smaller motor, than the larger. It is what would be considered middle of the road size wise.
The cam in both are very similar, which would make it more radical in the smaller motor, than the larger. It is what would be considered middle of the road size wise.
1 7/8s would make a little more up top, but not much. Single digits.
500 through an auto would be possible, yes. No real need for a bigger cam. These heads don't like much bigger.
Thread Starter
FormerVendor
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Joined: Jun 2007
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From: Virginia Beach,Virginia
With a good intake and tb,1 7/8 headers with no cats and bigger exhaust-this car would easily make 560-570 rwhp
ONLY 540HP whats wrong with you people? I thought it would of made some power.lol Nice job,sure would like to know more about that cam and how much homework you guys did fo figure it out.
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Damnit! I just sent my L92's off to be CNC ported! Any figures on the "secret cam specs" that make all this power, Ed/Shawn, of Virginia Speed? Just curious to know what the "ideal" cam is to make 540+ rwhp, with 408 CID, L92 heads, and 11:1 compression and a 4-bbl intake and a 6-speed gear box. I would like to do this right the first time and be content with it!
Damnit! I just sent my L92's off to be CNC ported! Any figures on the "secret cam specs" that make all this power, Ed/Shawn, of Virginia Speed? Just curious to know what the "ideal" cam is to make 540+ rwhp, with 408 CID, L92 heads, and 11:1 compression and a 4-bbl intake and a 6-speed gear box. I would like to do this right the first time and be content with it!
Thread Starter
FormerVendor
iTrader: (3)
Joined: Jun 2007
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From: Virginia Beach,Virginia
You can start a pull at 2000, as in hit the button, and nail it, but the way the dyno samples, it will start the graph line at the flash of the converter. I've tried countless times to have them start early, and regardless when you hit the button, and then the throttle, they always seem to start the graph at the converter flash.
So even if you start at 2000, if the converter flashes to 3000, that's where the run will start on the graph.
Later model converters that you can lock, you can start them low, just like a clutch.
So even if you start at 2000, if the converter flashes to 3000, that's where the run will start on the graph.
Later model converters that you can lock, you can start them low, just like a clutch.
i actually didn't think about the non-lockup converters of yesteryear though.
234/240, 236/242 or 232/238 both around .610" lift and 112 or 113ls thats the most polpular cams I have tested for someone out there. Comp sends them with certain requests, these wheresent eith the notes of L92 heads 400 or less cubes ? they all made over 625FWHP wich should be about 540rwhp on a six speed car ? we tried a off the shelf xer287 with 238/242 112ls and that made within 5hp of these specific cams ? My best luck has been in my 05 408ci GTO with a 232/242 113ls Its an auto buts runs 10.90's all day on pump gas.
234/240, 236/242 or 232/238 both around .610" lift and 112 or 113ls thats the most polpular cams I have tested for someone out there. Comp sends them with certain requests, these wheresent eith the notes of L92 heads 400 or less cubes ? they all made over 625FWHP wich should be about 540rwhp on a six speed car ? we tried a off the shelf xer287 with 238/242 112ls and that made within 5hp of these specific cams ? My best luck has been in my 05 408ci GTO with a 232/242 113ls Its an auto buts runs 10.90's all day on pump gas.