Comp Thumpr Cams - Any good? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 05-17-2008, 04:25 PM
Member
 
Join Date: Jul 2004
Location: ny
Posts: 37
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Comp Thumpr Cams - Any good?

I am changing the cam on my engine. I was considering the thumpr cam. Heard a lot of mixed reviews. I will start by telling what I have and what I am considering. I have a zz4 shortblock, GM fast burn heads (62cc, 2.00/1.55), GM hot cam (218/228 dur 525/525 lift),1.6 rockers, 750 carb, 4.11 posi, th350, 2800 stall, 28" tire in 68 camaro. I looked at two cams - the thumpr and mutha thumper. The specs are -
thumpr - dur227/241 lift 513/498 w/1.5
dur227/241 lift 547/531 w/1.6
muthr
thumpr- dur235/249 lift 522/509 w/1.5
dur235/249 lift 556/549 w/1.6

I was thinking about the thumpr w 1.6 rockers. I am not to educated in this field, so please any help would be appreciated!! Thanks

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-17-2008, 10:36 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,979
Wiki Edits: 326

Thanks: 766
Thanked 1,023 Times in 855 Posts
Deleted by author. No comment. Well, maybe one....AAAARRRRGGGGHHHH.

Last edited by techinspector1; 05-18-2008 at 12:08 AM.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-18-2008, 09:43 AM
How fast is fast enough?
 
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 29
Posts: 9,112
Wiki Edits: 0

Thanks: 17
Thanked 335 Times in 315 Posts
Will it sound nice... Some would say that. would it perform better? No... It might shave a few tenths off you4 1/4 but on the street you'll have much less torque largely due to way too much exhaust duration. those cams are a lot more show than go.

Oh, and I really enjoy seeing techinspector get frustrated at these posts... I understand why he does but its funny to see him get so mad from all the stupid comments made on here.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 05-18-2008, 06:36 PM
Registered User
 
Last wiki edit: Wheelbase database Last photo:
Join Date: Jan 2007
Location: Virginia
Posts: 3,569
Wiki Edits: 1

Thanks: 6
Thanked 156 Times in 143 Posts
Sorry, but I almost put the Thumper cams in the same category as coffee can tail pipes. From the ads it appears that you get all of the obnoxious lumpy idle with none of the pesky extra horsepower that a real cam would give you. Might as well put a screaming chicken decal on the hood while you're at it...
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 05-18-2008, 06:41 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,979
Wiki Edits: 326

Thanks: 766
Thanked 1,023 Times in 855 Posts
Thanks joe, LMAO......pesky extra hp.... ........ AAAARRRRGGGGHHHH....
Reply With Quote Quick reply to this message
The Following User Says Thank You to techinspector1 For This Useful Post:
Chevrolet4x4s (09-02-2014)
  #6 (permalink)  
Old 05-19-2008, 08:06 AM
F-BIRD'88's Avatar
Yada Yada Yada
 
Last photo:
Join Date: Oct 2005
Location: Ontario, Canada
Posts: 9,153
Wiki Edits: 0

Thanks: 5
Thanked 380 Times in 374 Posts
Save yourself the money on a new BuNnY CaM . Just advance the hell out of the cam you have. About 8-10 more degrees should do it., Retard the ignition timing, get some old worn out spark plug wires that arc at idle and raise the idle speed. Same idle sound. Cool light show under the hood.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 08-28-2014, 02:14 PM
Registered User
 
Join Date: Aug 2014
Posts: 1
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Why would anyone want to be part of a forum if all you're going to get is smartalec comments from know-it-alls that are appaerently nothing more than full of themselves. People ask questions because they want to know, not to get ridiculed for asking. Sorry I joined.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 08-28-2014, 02:18 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,979
Wiki Edits: 326

Thanks: 766
Thanked 1,023 Times in 855 Posts
Quote:
Originally Posted by oldgearhead View Post
Why would anyone want to be part of a forum if all you're going to get is smartalec comments from know-it-alls that are appaerently nothing more than full of themselves. People ask questions because they want to know, not to get ridiculed for asking. Sorry I joined.
Not all that hard to un-join.
Good luck finding a forum where nobody has an opinion.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 08-28-2014, 03:40 PM
JeffB's Avatar
Registered User
 
Last photo:
Join Date: Jul 2006
Location: Phoenix,AZ
Age: 68
Posts: 1,702
Wiki Edits: 0

Thanks: 2
Thanked 89 Times in 82 Posts
Quote:
Originally Posted by techinspector1 View Post
Not all that hard to un-join.
Good luck finding a forum where nobody has an opinion.
We seem to be living in a new world where people are "offended" easily Maybe that "Change" folks wanted hasn't turned out so well So many people LIE these days and use the excuse that telling the truth will hurt someones feelings,time to get over it and man up. The truth is "poser cams" might have a sound but they won't make MAX horsepower and that's the bottom line!
Reply With Quote Quick reply to this message
The Following User Says Thank You to JeffB For This Useful Post:
Chevrolet4x4s (09-02-2014)
  #10 (permalink)  
Old 08-28-2014, 03:44 PM
Greg T's Avatar
www.krusinklassics.net
 
Last photo:
Join Date: Jul 2007
Location: Escanaba, MI.
Age: 60
Posts: 1,150
Wiki Edits: 0

Thanks: 20
Thanked 41 Times in 32 Posts
Quote:
Originally Posted by JeffB View Post
We seem to be living in a new world where people are "offended" easily Maybe that "Change" folks wanted hasn't turned out so well So many people LIE these days and use the excuse that telling the truth will hurt someones feelings,time to get over it and man up. The truth is "poser cams" might have a sound but they won't make MAX horsepower and that's the bottom line!

We don't keep score and everyone gets a trophy!
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 08-28-2014, 04:10 PM
HotRodDinosaur's Avatar
Registered User
 
Join Date: Aug 2014
Posts: 59
Wiki Edits: 0

Thanks: 2
Thanked 2 Times in 2 Posts
I ran the thumper cam years ago, mistake.. It sounded good but it wiped two lobes out after break in.. And you would of never known it without adjusting valves from the radical idle.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 08-28-2014, 04:47 PM
jokerZ71's Avatar
Wrench Turner
 
Last photo:
Join Date: Jun 2013
Location: Stanton,Tn.
Age: 52
Posts: 2,071
Wiki Edits: 0

Thanks: 142
Thanked 350 Times in 313 Posts
I doubt you'll see any improvement over the Hot cam in your engine now.If you build an engine to compliment the specs of the Thumper,then,yes,it would.There's no way I would put 1 in an engine.Not on purpose anyway.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 08-28-2014, 08:11 PM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 8,115
Wiki Edits: 0

Thanks: 323
Thanked 785 Times in 751 Posts
thumpr/extreme energy/voodoo are all just names for marketing. Are they good? In the right combination,yes. Your job id to pick the correct camshaft for your job,then name it what ever you want.
I think I will name my cam, The tickler,,,
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 08-28-2014, 09:17 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,979
Wiki Edits: 326

Thanks: 766
Thanked 1,023 Times in 855 Posts
Quote:
Originally Posted by vinniekq2 View Post
I think I will name my cam, The tickler,,,
Funny, that's what I named my girlfriend. She uses a feather.
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 08-29-2014, 09:41 AM
1971BB427's Avatar
Registered User
 

Last journal entry: Latest changes
Last photo:
Join Date: Dec 2010
Location: Portland
Posts: 1,747
Wiki Edits: 0

Thanks: 14
Thanked 285 Times in 248 Posts
I'm curious as to how many of the folks who talk down the Thumpr cams, have actual experience with them? Have any of you guys ever been around one, or ridden in a car that has one in the engine? I think I already know the answer, as if you had you might change your mind about them.
I know of a couple guys going mid 6's in the 1/8 mile with a Thumpr cam, and I've personally installed 4 of them in engines myself. All but one are very happy, and the only one who isn't is a guy who wouldn't listen, and wanted a larger Thumpr cam in his fairly stock 350. I tried to talk him into the entry level Thumpr, and afterwards he agreed it lost some bottom end, and he's going to go back and build the engine further to match up with the cam better.
I have the mid level hydraulic flat tappet Thumpr in the .040" over 454 in my '63 Falcon, and I love it. It's got tons of power, will lift the front wheels on launch, and all on a completely stock bottom end, with just a pair of Edelbrock heads, an intake and carbs. Yes, it also sounds great, and still idles under 900 rpms, while sounding good.
If you're looking at getting the utmost performance from a cam, I agree there are tons of grinds that will deliver more power, or better power curves. But to just write off the Thumpr cams as being posers, that don't make low end power is giving a careless reply to a legitimate question asked here. Especially since you are doing so without having ever run one, or had any exposure beyond looking at the specs.

Oh, and here's a picture of Littleman's truck running low 9's in the 1/4 with a (heaven forbid!) Thumpr cam!


---------- Post added at 08:41 AM ---------- Previous post was at 08:40 AM ----------

Quote:
Originally Posted by HotRodDinosaur View Post
I ran the thumper cam years ago, mistake.. It sounded good but it wiped two lobes out after break in.. And you would of never known it without adjusting valves from the radical idle.
Wiped two lobes out, and didn't know it? How could you not hear two rockers clicking, and feel the loss of power from one or two cylinders not working?

Last edited by 1971BB427; 08-29-2014 at 09:38 AM.
Reply With Quote Quick reply to this message
The Following User Says Thank You to 1971BB427 For This Useful Post:
37fordinaford (09-01-2014)

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
comp cams thumpr seanross Engine 13 11-28-2011 04:38 PM
comp cams Big mutha thumpr, bee hive springs jppcrowe Engine 9 06-08-2009 09:56 AM
Comp Cams Thumpr Cam Geradmg Hotrodders' Lounge 5 03-28-2008 05:12 AM
thumpr cams backyard71nova Engine 9 07-28-2007 02:11 PM


All times are GMT -6. The time now is 04:58 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.