Go Back   The Supercar Registry > General Discussion > Technical & Restoration


Reply
 
Thread Tools Display Modes
  #1  
Old 04-20-2011, 05:30 AM
302moz 302moz is offline
Yenko Contributing Member
 
Join Date: Sep 2006
Location: Michigan
Posts: 1,289
Thanks: 13
Thanked 52 Times in 38 Posts
Default roller cam or flat tappet???

What cam to use in a l78 396 flat tappet solid or a solid roller?With all of the past cam problems a roller might be the answer. The car is going to be a show car that isnt driven alot. Lots of start and shut off.I never had a problem in the past with a flat tappet cam. Have heard other people with cam troubles in bb chevrolets. What are the members using in there show cars? thanks John p.s. I always use rotella oil and comp cam oil additive (zinc)
Reply With Quote
Click here to view all the pictures posted in this thread...
  #2  
Old 04-20-2011, 05:41 AM
Bill Rose Bill Rose is offline
Yenko Contributing Member
 
Join Date: Sep 2004
Location: New Jersey
Posts: 944
Thanks: 18
Thanked 24 Times in 13 Posts
Default Re: roller cam or flat tappet???

I put a mild solid roller in mine. With all the starts/stops, it just make sense to go the safe route. Also, no break in concerns, or dealing with oil additives. I'll never build another big block with a flat tappet cam.
__________________
69 El Camino
69 Nova
C7 Vette
Reply With Quote
  #3  
Old 04-20-2011, 06:39 AM
Salvatore Salvatore is offline
Yenko Contributing Member
 
Join Date: Nov 2002
Location: Pennsylvania
Posts: 9,908
Thanks: 3
Thanked 229 Times in 193 Posts
Default Re: roller cam or flat tappet???

Either or John. Usually a solid cam gives you some leeway becuase of the clearance. Never had a problem with a flat tappet. Need to lube it up real good for the initial start and after that I use Brad Penn. Rotella is great but they took alot of the zinc out. There was a bad run of cams a couple years back but nothing lately. What cam is in your green L78 car? How about your Z/28's? Are they all rollers?
Reply With Quote
  #4  
Old 05-03-2011, 07:28 PM
firstgenaddict's Avatar
firstgenaddict firstgenaddict is offline
Yenko Contributing Member
 
Join Date: Jul 2001
Location: Greenville, South Carolina
Posts: 5,596
Thanks: 161
Thanked 949 Times in 459 Posts
Default Re: roller cam or flat tappet???

We put a Crower Solid Roller in Williams Black RS/Z after the flat tappet bit the dust...
__________________
~JAG~
NCRS#65120
68 GTO HO 4 spd Alpine Blue /Parchment 2 owner car
#21783 71 Corvette LT1 45k miles Orig paint - Brandshatch Green - National Top Flight - last known 71 LT1 built.
71 Corvette LT1 42k miles Original paint - Black - black leather - only black LT1 known to exist.
NUMEROUS Lemans blue Camaros,
Monza Red and Daytona Yellow Corvettes
& a Chevelle or two...
Survivors, restored cars, & other photos
https://picasaweb.google.com/lh/myphotos
Reply With Quote
  #5  
Old 05-04-2011, 05:14 PM
Alss's Avatar
Alss Alss is offline
Yenko Contributing Member
 
Join Date: Feb 2002
Location: The tax State of New Jersey
Posts: 2,542
Thanks: 19
Thanked 54 Times in 19 Posts
Default Re: roller cam or flat tappet???

nothing but rollers
__________________
1969 9566AA COPO Chevelle M-22
1969 Malibu 489 ZL-1 T-56/4.56
1969 Beaumont 540 th400 3.70
1969 Chevelle 300 Deluxe 427 ZL-1 M 22W
1970 Olds 442 W 30 2 door post
1969 Ply. GTX 426 hemi auto. Blue.
1940 Dodge pick up Durango 4X4
1968 Camaro ragtop LSA ZL1
Reply With Quote
  #6  
Old 05-04-2011, 10:03 PM
firstgenaddict's Avatar
firstgenaddict firstgenaddict is offline
Yenko Contributing Member
 
Join Date: Jul 2001
Location: Greenville, South Carolina
Posts: 5,596
Thanks: 161
Thanked 949 Times in 459 Posts
Default Re: roller cam or flat tappet???

I can't give Crower (Dave Crower) a better or more glowing recommendation... he was extremely helpful and explained everything thoroughly.
I did not question his lift specs...even though other people did/have and after driving the little 302 William couldn't be happier either.

I gave Dave the following information:
1. car make model
2. weight
3. Gear ratio - Diff
4. gear ratios - trans
5. tire height
6. CUI - and Compression ratio - rod length etc.
7. RPM max
8. Flow numbers on the heads from .100 - .700
9. Intended use

I told him I did not care about a PEAK number I wanted something that would have a torque curve that was fat where the engine would spend most of it's time... he delivered... on the street it is extremely easy to drive without your foot in it... with your foot in it the whole attitude changes forget about nailing the throttle... the forward movement is overcome by tire smoke.

When you ROLL into the throttle it blisters the bias plys in any gear. It is incredibly fun now, with the centerforce clutch it's near as easy to drive as a Honda.

Afterwards he asked if I would like some conservative desk top numbers. BTW These numbers would be header w collectors only.
HP- 500+ 7500 self imposed red.
Torque - 475+ ft# @ 5500 (350 ft# @ 3500 rpm)

__________________
~JAG~
NCRS#65120
68 GTO HO 4 spd Alpine Blue /Parchment 2 owner car
#21783 71 Corvette LT1 45k miles Orig paint - Brandshatch Green - National Top Flight - last known 71 LT1 built.
71 Corvette LT1 42k miles Original paint - Black - black leather - only black LT1 known to exist.
NUMEROUS Lemans blue Camaros,
Monza Red and Daytona Yellow Corvettes
& a Chevelle or two...
Survivors, restored cars, & other photos
https://picasaweb.google.com/lh/myphotos
Reply With Quote
  #7  
Old 05-05-2011, 12:14 AM
bbbenny bbbenny is offline
Yenko Contributing Member
 
Join Date: Feb 2002
Location: lehighton,pa. usa
Posts: 1,283
Thanks: 5
Thanked 424 Times in 158 Posts
Default Re: roller cam or flat tappet???

Jim, If you want no issues persay. Go with a roller cam, start the motor up. Check the motor for any leaks and issues. And let it rip. I did that last week end. Benny
__________________
Thanks Benny
Enjoy; orginal cars,with orginal drivetrains and docs. bblocks are my favorite.
Reply With Quote
  #8  
Old 05-05-2011, 12:18 AM
mockingbird812's Avatar
mockingbird812 mockingbird812 is offline
Yenko Contributing Member
 
Join Date: Jun 2004
Location: Dayton
Posts: 14,403
Thanks: 908
Thanked 801 Times in 484 Posts
Default Re: roller cam or flat tappet???

Now THAT is a pretty good endorsement from a fellow that had outstanding results last weekend!!
__________________
Sam...

Reply With Quote
  #9  
Old 05-05-2011, 04:54 AM
Nova Jed Nova Jed is offline
Senior Member
 
Join Date: Oct 2007
Location: Gibraltar
Posts: 2,095
Thanks: 0
Thanked 1 Time in 1 Post
Default Re: roller cam or flat tappet???

BBbenny let it rip for sure with a roller! I even asked if he was gonna take it easy on the first pass. He said, nope, gonna let it rip.
__________________

Jed 69,70,71 Nova's 1955 Bel Air and a 69 Camaro.
Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 06:43 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.

O Garage vBulletin Plugins by Drive Thru Online, Inc.