mild engine build
#1
I have a 72 mach1 with a 351 cleveland h code. I have a edelbrock 4 barrel intake and 600 carb for it. I also picked up a comps cam thumper series camshaft. Using stock exhaust manifolds but switching to dual exhaust from single. I know its not the best cam i can pick but im just makin a cruiser out of it not lookin for high horse power. But was wondering if anyone may know about how much horse power gains i can expect outta this setup. Any help would be appriciated. Thanks.
Reply
#2
Okay, so I went to Comp Cams on their on-line chat and spoke with an agent.

At first all I got was that they cannot give out estimates of horsepower and torque but Comp Cams is #1 .... He finally did state that in a SBC the Thumper Series cam produced about 10% increase in horsepower over the stock GM performance cam.

So other than their promotion of the "sound" of the Thumper Series cam an increase should be seen. Of course couple that with the new intake, a 600 CFM carb, and dual exhaust - the increase should be noticeable in the seat of the pants department test and should sound good. I don't think you would be looking at 350 HP but an increase of the stock under 200 HP to the higher 200's is a possibility.

Let's hope that someone else will jump in that has personal experience with real numbers.


Attached Files Image(s)
   
Reply
#3
Go to the comp cams website and download there CamQuest helper. Put in your specs, it will have everything from carb, intake, heads, exhaust, etc. After you add all the info it will give you a very close estimate of what kind of power you can expect. Great tool I've played with it on real engines and ones I'm gonna build, it's great. JTS 71 Mach1
Reply
#4
(04-18-2012, 04:35 AM)JTS71 Mach1 Wrote: Go to the comp cams website and download there CamQuest helper. Put in your specs, it will have everything from carb, intake, heads, exhaust, etc. After you add all the info it will give you a very close estimate of what kind of power you can expect. Great tool I've played with it on real engines and ones I'm gonna build, it's great. JTS 71 Mach1

Wow, didnt know about that. According to camquest i should be around 275 hp and 305 ft lb of torque. I can live with that out of a basically stock motor. Thats more than i figured.

Reply
#5
Yeah if you change things such as your carb size, say to a 750 with the other specs staying the same it will make a noticeable difference. Gives you lots of variables to play with. JTS71 Mach1
Reply
#6
It is very important that you check for push rod length when you put an aftermarket cam in. Most all will have a different base circle which can effect the valve train geometry amoung other things, making the rocker not sweep the valve tip in the center. I can pretty much guarantee you the lifter preload will not be right as well. You want to keep the preload in the .020-.040 range IMO. Some people just throw them in and "get away with it" but it's not right and they don't even know it. Even if it runs ok you will most likely be leaving power on the table. I highly recommend degreeing it in to be sure you are getting the most power you can get. If thats out of the ? then at least get a good quality chain & gears and set it in the zero slot. It is also important to get the springs the mfgr recommends and put them in at the right height and check for coil bind, rocker to fulcrum bind, retainer to guide clearance, stem seal clearance, piston to valve clearance, etc then you will get the most from your new cam.
Reply


Possibly Related Threads…
Thread Author Replies Views Last Post
  All-Aluminum 351 Cleveland Engine Build Mach 1 Club 1 9,142 10-13-2017, 08:26 AM
Last Post: Steven Harris
  351 Cleveland Engine Mustangs, Shelby and Cobra Data Mach 1 Club 2 14,141 01-16-2014, 01:11 AM
Last Post: Steven Harris
  How To Balance An Engine - Engine-Balancing Basics Mach 1 Club 0 7,883 01-06-2014, 05:06 AM
Last Post: Mach 1 Club
  351 Cleveland Engine Mach 1 Club 4 20,457 07-22-2013, 01:01 PM
Last Post: JTS71 Mach1
  Which engine is this? stang98kjg 5 15,713 06-09-2012, 08:15 AM
Last Post: gxr02190
  408 Clevor Build Mach 1 Club 0 7,027 10-08-2011, 10:38 PM
Last Post: Mach 1 Club
  429 P.I Engine Grabber Lime 5 18,247 09-07-2011, 08:37 AM
Last Post: Grabber Lime
  Building the Cobra Jet Engine Mach 1 Club 3 12,824 08-28-2011, 02:45 AM
Last Post: Mach 1 Club
  "Clevor" Engine Build? Klutch 2 13,569 08-10-2011, 11:39 AM
Last Post: 70427w
  Engine mounts Oztrailer 25 66,536 07-25-2011, 01:32 PM
Last Post: Steven Harris

Forum Jump:


Users browsing this thread: 1 Guest(s)
[-]
Latest Threads
What's One More Iron In The Fire!
Last Post: fram lee666
03-18-2024 06:21 PM
» Replies: 125
» Views: 238145
"Jacobra"
Last Post: JTS71 Mach1
06-30-2023 11:13 PM
» Replies: 86
» Views: 150927
My old Queensland Ambulance
Last Post: JTS71 Mach1
06-30-2023 11:08 PM
» Replies: 5
» Views: 1706
New member from San Jose, CA
Last Post: JTS71 Mach1
05-09-2023 08:39 AM
» Replies: 12
» Views: 3965
Saving Seatbelts
Last Post: Jim
02-19-2023 10:23 PM
» Replies: 2
» Views: 9114
Sourcing new wheels
Last Post: JTS71 Mach1
01-25-2023 02:34 PM
» Replies: 1
» Views: 2003
Shaker Air Filter
Last Post: JTS71 Mach1
01-08-2023 02:24 AM
» Replies: 3
» Views: 1467
1971 Mach 1 parting out interior parts -...
Last Post: ylwhrse
12-22-2022 01:38 PM
» Replies: 0
» Views: 640
Painting
Last Post: Rare Pony
12-14-2022 06:24 PM
» Replies: 2
» Views: 1971
WELCOME ALL NEW MEMBERS INTRODUCE YOURSE...
Last Post: JTS71 Mach1
08-31-2022 01:36 PM
» Replies: 82
» Views: 157076
1970 mach 1 matching numbers
Last Post: Kstweeter
08-31-2022 10:31 AM
» Replies: 1
» Views: 1087
Brake booster/servo hose length
Last Post: JTS71 Mach1
08-23-2022 09:40 AM
» Replies: 7
» Views: 3006
New Member
Last Post: JTS71 Mach1
08-20-2022 11:18 AM
» Replies: 2
» Views: 1501
smooth window operation on 70 Mach
Last Post: CUSTOMMISER
08-15-2022 12:10 PM
» Replies: 2
» Views: 1482
Blinkers on solid
Last Post: busted21
08-09-2022 03:58 AM
» Replies: 14
» Views: 8729
Blinkers on solid when lights on.
Last Post: JTS71 Mach1
08-08-2022 12:06 PM
» Replies: 1
» Views: 1720
351 cj running hot
Last Post: busted21
08-08-2022 12:13 AM
» Replies: 5
» Views: 3411
Major Winter projects
Last Post: JTS71 Mach1
07-09-2022 05:12 AM
» Replies: 49
» Views: 21300
Happy Fathers Day!!!
Last Post: JTS71 Mach1
06-20-2022 02:34 AM
» Replies: 0
» Views: 1686
1969 Raven Black 390 Looking For
Last Post: mason1958
06-11-2022 09:48 AM
» Replies: 10
» Views: 15088

>