Cam - Compression - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
ยป Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Cleveland Tech
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto Escrow

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 09-23-2004, 02:25   #1 (permalink)
Registered User
 
xbgs351's Avatar
 
Join Date: Oct 2003
Posts: 1,067
Cam - Compression

The machining on my short block is all done, and I will have 10.5:1 compression instead of my planned 10.25:1. The deckheight from the factory was allover the place.

I have ordered a COME CLS138 from COME but it has gone missing in the post.

I am now concerned that the cam is too small for 10.5:1 compression and I will get detonation. The cam specs are:
237/248 @50 thou
0.318/0.335 lift.
112 LCA

Should I step up to the CSBS 688?
243/249 @ 50 thou
0.344/0.350 lift
108 LCA
xbgs351 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 09-23-2004, 03:14   #2 (permalink)
ignorance is bliss
 
Join Date: Apr 2004
Location: warrnambool
Posts: 281
Re: Cam - Compression

Have got a 378 with 10.4 to 1 fitted with CLS108, it used to be ok on the old super with initial at 13 to 15 degrees. Probably depends on your end use of the car I`d say. Mine was an XC with small stall and 3.0 rear end. No probs on the street or strip with pinging. Ran avgas on the strip though so shouldnt be a problem anyway. If you ask Sam or Izzy they would be able to match the cam with what you need anyway.
clevokid is offline   Reply With Quote
Old 09-23-2004, 03:39   #3 (permalink)
Veteran Ford Member
 
Join Date: Jul 2001
Location: In a Dark Cave
Posts: 5,316
Re: Cam - Compression

I have 10.5 ish with a CLS108 and once I tuned it right and fixed a vacuum leak it didn't ping much at all. Whilst it is not a big cam it is big enough.
Would the rest of your combo be suited to the bigger cam if you went that way ?
I have the advantage of being about 2 Kms away from COME so I pick my stuff up.
xacoupe is offline   Reply With Quote
Old 09-23-2004, 03:49   #4 (permalink)
74 XB Fairmont
 
brenx's Avatar
 
Join Date: Sep 2001
Location: Cranbourne, Vic
Posts: 5,113
Re: Cam - Compression

I you were going a solid cam @ 10.5:1 Jeff's (xacoupe) cam is a nice cam. That should run on 98 octane fuel with no detonation what so ever.

What heads are you running? If they are alloy? The comp can be higher again. I've been running around on 91 octane with 11.2:1 comp.

Brenden
__________________
XB Fairmont (street car) 11.07@123.02mph.
brenx is offline   Reply With Quote
Old 09-23-2004, 03:50   #5 (permalink)
Turbo 351TC "Coming soon"
 
TD302's Avatar
 
Join Date: Mar 2004
Location: Alex Hills Qld
Age: 38
Posts: 259
Re: Cam - Compression

A cam with approx 240 @.050 can run up to 10.5:1 on PULP. I'll let you know soon i'm trying 10.6 with a 240@.050 cam in my 302. At the most a booster will be needed which isn't that bad for the gain of hp by upping the compression from 9.33 to 10.6. The Crane h296 needs around 10:1 to make the most of it anyhow. With alloys you can run approx 1 point higher compression with out any problems
Cheers Brett
__________________
California Speed Supplies
HOGG Performance (07)33764333
"Blocks and women are the same, if you got a good one it won't need a girdle"
TD302 is offline   Reply With Quote
Old 09-23-2004, 03:54   #6 (permalink)
EFI 351c TD CORTINA
 
qwikcorty's Avatar
 
Join Date: Oct 2002
Location: VIC, Narre Warren
Age: 31
Posts: 1,344
Re: Cam - Compression

Im currently getting my 351 tuned, its running a similar sized cam, 238 246 @050 and 560 570 lift. And 10.8:1 compression. . . .
But ive also got multipoint fuel injection, so hopefully ill get away with premium .
__________________
1976 351c td cortina
qwikcorty is offline   Reply With Quote
Old 09-23-2004, 04:01   #7 (permalink)
Turbo 351TC "Coming soon"
 
TD302's Avatar
 
Join Date: Mar 2004
Location: Alex Hills Qld
Age: 38
Posts: 259
Re: Cam - Compression

If not just use the race formula booster made by nos i've been told this works best for the money. I was going to use BP100 but told this mix ws better. That and ultimate is working on a 12.5:1 Chev with no probs at all.
QUIKCORTY hows the beast going. Is it off the dyno yet???
__________________
California Speed Supplies
HOGG Performance (07)33764333
"Blocks and women are the same, if you got a good one it won't need a girdle"
TD302 is offline   Reply With Quote
Old 09-23-2004, 04:17   #8 (permalink)
Registered User
 
xbgs351's Avatar
 
Join Date: Oct 2003
Posts: 1,067
Re: Cam - Compression

Quote:
Originally Posted by brenx
I you were going a solid cam @ 10.5:1 Jeff's (xacoupe) cam is a nice cam. That should run on 98 octane fuel with no detonation what so ever.

What heads are you running? If they are alloy? The comp can be higher again. I've been running around on 91 octane with 11.2:1 comp.

Brenden
The cam in question is the same as Jeff's but with a 112 LCA.
I will be running 98 octane.
Heads are 65cc 302's
Block is zero deck
Manifold is Funnelweb
Carb is a Holley HP 750DP

I will speak to COME again tomorrow
xbgs351 is offline   Reply With Quote
Old 09-23-2004, 05:36   #9 (permalink)
Veteran Ford Member
 
Join Date: Jul 2001
Location: In a Dark Cave
Posts: 5,316
Re: Cam - Compression

A very similar setup to mine with the exception of the Funnelweb.. I will be interested to see what you think of it as I am considering ditching the performer ...
xacoupe is offline   Reply With Quote
Old 09-23-2004, 06:05   #10 (permalink)
74 XB Fairmont
 
brenx's Avatar
 
Join Date: Sep 2001
Location: Cranbourne, Vic
Posts: 5,113
Re: Cam - Compression

Yours is screaming out for a single plane Jeff

Brenden
__________________
XB Fairmont (street car) 11.07@123.02mph.
brenx is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Cleveland Tech



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

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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
cam timing advice needed Rollin Inline 6 Tech 33 07-31-2004 19:24
Cam, Cam, Cam. Ross79xd Cleveland Tech 5 07-27-2004 19:41
*Please read!* WANTED JMM and Crow cam owners in brissy or coast!! Rollin Inline 6 Tech 60 05-31-2004 02:37
Tips for EL XR8 camshaft change (long) EL1XR8 Windsor Tech 19 03-25-2004 01:28
well, my car is offically GHEY Rollin Australian Falcons 83 01-25-2004 08:18

Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 11:26.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.