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recamming the 406
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dawg
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Joined: 10 Oct 2006
Posts: 448
Location: Colebrook Connecticut
15224.86 points



PostPosted: Tue Jul 27, 2010 9:31 pm    Post subject: Reply with quote

I would have to agree since i been down that road before lol.

this is why im looking for ideas and something that will work on the street and track.
I do have a 3000 stall converter but i have a 2500 TCI breakaway converter in there now.
also with that being said and the fact that i have a 406 SBC that pulls like a bear from standstill (but I know It can do more with a better cam choice)
and get some more upper end.
some say stay with the cam I got cuz it will work great with NOS.
And it has good manners on and off the track.
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Big Dave
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Joined: 04 Dec 2005
Posts: 2646
Location: Tampa Florida
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PostPosted: Wed Jul 28, 2010 12:18 pm    Post subject: Reply with quote

I would also argue that a hydraulic roller cam is going to be hard pressed to achieve max 7,000 RPM with any kind of valve control. A 6,400 RPM is a much more reasonable expectation for a heavy hydraulic lifter without a REV kit. I use 100 gram solid Lunati roller lifters in my 406 with a Lunati cam closer to your second listing and I have a 3400 RPM stall converter with 3.73 gears and it is very driveable. I much prefer the solid cam to the hydraulic roller cam I threw away after trying to reach the top of the RPM band a few times. (when I pulled the CompCams hydraulic roller conversion tappets out 8 of the 16 lifters had fallen apart they had lost their keeper hair pin into my engine with only my valve springs holding the lifters together. So far my magnetic oil pan drain plug has recovered only three of the missing parts with five unaccounted for.

Big Dave
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squeeezer
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Joined: 02 Mar 2007
Posts: 2427
Location: new richmond WI
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1991 Chevrolet Camaro

PostPosted: Wed Jul 28, 2010 12:38 pm    Post subject: Reply with quote

i had a similar grind in my 355 it was super streetable
i got lucky with 10hg of vacuum an still power assist at the brakes
1000 rpm idle bout 800 in gear i too would recomend at least a 3200-3500 rpm stall for the car since it is a bigger motor

im sure your peak tq will be in the 4700-5000 range Wink

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dawg
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Joined: 10 Oct 2006
Posts: 448
Location: Colebrook Connecticut
15224.86 points



PostPosted: Fri Nov 19, 2010 1:37 pm    Post subject: Reply with quote

finally got around to installing the cam lol.
(waited till end of the carshow season)
here is my numbers on the chassis dyno.
592hp@6,500rpm. - 556lb@4,900rpm no NO2
best of 4 pulls.
installed a new converter that flashes at 3200.
where the car used to pull down low it seems to pull now at mid range till top end.
ill add the nitrous next spring and hopefully see at lest 150hp increase.
im so happy with the car now lol.
even get some air under the front tires now.
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Skunkworkx
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Joined: 02 Sep 2007
Posts: 352
Location: Harford Co. Maryland
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1968 Chevrolet Camaro

PostPosted: Sun Nov 21, 2010 1:04 pm    Post subject: Reply with quote

What is the rest of the build again ???
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68 Camaro LSx
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squeeezer
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Joined: 02 Mar 2007
Posts: 2427
Location: new richmond WI
191524.76 points


1991 Chevrolet Camaro

PostPosted: Sun Nov 21, 2010 1:56 pm    Post subject: Reply with quote

[quote="dawg592hp@6,500rpm. - 556lb@4,900rpm no NO2




at the wheels????? idk???? Embarassed

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dawg
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Joined: 10 Oct 2006
Posts: 448
Location: Colebrook Connecticut
15224.86 points



PostPosted: Sun Nov 21, 2010 4:21 pm    Post subject: Reply with quote

yes atw
13:1 compression as i mentioned before.
2500 Stall. 9.5-10.5:1 compr. 3.90-4.11 axle ratio. Up to 780 CFM Carb. RPM-Range (3000-7000) Valve Lift (.530 .550) Valve Lash hot (.000 .000) ADV Duration (282 294) .050 Duration (234 246) LC 110
also using 1:6 rocker as per machine shop advice.
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