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Author Topic:   solid cam/hydraulic lifters tech
neil rucker
Dirt Forum Champ
Total posts: 799
posted June 13, 2005 08:13 PM  
anyone run a solid cam with hydraulic lifters? why?

racer17j
Dirt Forum Champ
Total posts: 5390
posted June 13, 2005 11:57 PM  
i was just talking to bullet cams about this the other day.3 reasons people do it.

1. it is cheaper than solids, and easier on valve train parts

2. at low rpms it pulls more vac

3.it lowers compression for those who have compression rules.

you can run a hyd lifter on a solid cam with no problems since a solid lift cam is not as an agresive grind. however you can not run solid lifters on a hyd cam because of the aggresive grind..


sc1 racing
Dirt Freak

Total posts: 419
posted June 14, 2005 03:56 AM  
also you will set them with zero valve lash just as if it was a hydro cam..

i will talk to him some more today. i am going to experiment with a new vacum cam this weekend for them

outlawstock17
Dirt Forum Champ
Total posts: 1363
posted June 14, 2005 08:36 AM  
quote:
Originally posted by sc1 racing:
i was just talking to bullet cams about this the other day.3 reasons people do it.

1. it is cheaper than solids, and easier on valve train parts

2. at low rpms it pulls more vac

3.it lowers compression for those who have compression rules.

you can run a hyd lifter on a solid cam with no problems since a solid lift cam is not as an agresive grind. however you can not run solid lifters on a hyd cam because of the aggresive grind..


i disagree with just about all of that...

#1 - generally, a solid lifter cam has a more agressive profile than a hydraulic.
#2 - a solid lifter cam will pull more vacuum than an identical duration hydraulic cam because the valves stay closed longer due to lash and ramp design.
#3 - isn't bullet the same cam company that doesn't recommend synthetic oil with flat tappet cams?


leapinlizard
Dirt Freak

Total posts: 402
posted June 14, 2005 01:17 PM  
Solid cams are ground with a easier ramp to take up space rather than let the lash smack closed. Putting one on the other is asking for trouble.

97dirt
Dirt Forum Racer

Total posts: 94
posted June 14, 2005 01:28 PM  
I'm with you Outlaw, the reason people do it is to make more power, they do it all the time at my track, most of them put about 10-16 thous. lash on 'em, the tech man is starting to catch on, so now he checks for large amounts of lash on hyd cams

sc1 racing
Dirt Freak

Total posts: 419
posted June 14, 2005 05:45 PM  
a hydro cam has alot more agresive cut to it..that is why it is hydraulic..

bullet makes 2 exact cams in every way, exept 1 is solid, and 1 is hydraulic. same engine with cam swaps and nothing else solid pulled 18 an 1000, and hydrao cam pulled 21..

i dont like synthetic oil either. if you notice oil presure will drop. and it holds heat longer..


neil rucker
Dirt Forum Champ
Total posts: 799
posted June 14, 2005 07:03 PM  
thinks. anyone else?

outlawstock17
Dirt Forum Champ
Total posts: 1363
posted June 14, 2005 07:22 PM  
i guess all the nextel cup engineers are wrong...

nine finger
Dirt Forum Racer

Total posts: 76
posted June 26, 2005 12:55 PM  
yea i run one with a ford. lash is .002 to .004 with the comp stuff. must be enginered to work together.

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