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Old 04-30-2009, 05:50 AM
cdn454LS6 cdn454LS6 is offline
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Default 1st design off road cam #3927140 Vacuum Issue?

Hi Everyone
Rebuilding my stock 302 with all the original parts, pink rods, 1178 crank, 0 rockers, 11-1 stock pistons, single DZ carb etc etc.
Can I use the 1st design off road cam #3927140 in this stock engine for street use with 410 rear.
Can I still use pump gas 94 And is it possible to have a vacuum problem at all?
Thanks very much in advance for your help.
Ken
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  #2  
Old 04-30-2009, 06:27 AM
beater68427 beater68427 is offline
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Default Re: 1st design off road cam #3927140 Vacuum Issue?

My JL8 has that same cam seems to work fine I actually like the bleed with the overlap seems to be a bit of a ease with the comp ht. with pump gas, no ping brakes work great!!


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Old 05-01-2009, 08:50 AM
Bill Pritchard Bill Pritchard is offline
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Default Re: 1st design off road cam #3927140 Vacuum Issue?

In the mid 70's I built an LT1 with that cam and had it in a 69 Camaro with power disc brakes. Had no lack of vacuum for the brakes, so you should be fine.
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Old 05-01-2009, 09:00 AM
Andy Andy is offline
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Default Re: 1st design off road cam #3927140 Vacuum Issue?

A guy on camaros.net just put one in his car along with headers and he loves it. It really sounds strong in his video. I think he has a gardeners chambered exhaust too.

https://www.youtube.com/watch?v=WTgT0VCytGc

https://www.youtube.com/watch?v=iXK-lTkRXBY
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1967 Camaro 406 4 speed
1969 C/10 383 5 speed
1969 D300 318 4 speed
1969 Super Bee 383 4 speed
1972 K/5 350 Turbo 350
1972 Duster 340 727
1974 'Cuda 340 4 speed
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Old 05-01-2009, 02:46 PM
Salvatore Salvatore is offline
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Default Re: 1st design off road cam #3927140 Vacuum Issue?

4:10's may be a little tough to pull out with the car. Unless the trans was a M20 box. I would go to 4:56's with an M20 box and that car would be mean. Also I like pressed in wrist pins. A little safer and it doesn't have much, if anything to do with performance. 302's are all about proper gearing. We already know how much they rev!
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Old 05-01-2009, 06:54 PM
Steven J Steven J is offline
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Default Re: 1st design off road cam #3927140 Vacuum Issue?

My brother had a stock, except for the off road cam, 70 1/2 Z-28. 4 speed, 4.10 gear. It was fine with power brakes, had a great sounding idle, but 4.56 gears would have been better with that cam.
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