Welcome, Guest. Please login or register.
February 22, 2018, 05:32:46 am

Login with username, password and session length
434852 Posts in 37223 Topics by 9534 Members
Latest Member: 88_GT
Search: Advanced search
Advertiser Inquiries
+ SBFTECH.com Experienced Small Block Ford Tech
|-+ Grass Roots Tech
| |-+ Grass Roots Camshafts
| | |-+ Trickflow Stage 3 Camshaft Degreeing Results
0 Members and 1 Guest are viewing this topic. « previous next »
Pages: [1] Go Down Print
Author Topic: Trickflow Stage 3 Camshaft Degreeing Results  (Read 3710 times)
Joel5.0
El Hombre
Administrator
Big Block
*****
Offline Offline

Posts: 22510


Location: Puerto Rico
Miracles?.... by appointment only!


« on: March 20, 2016, 09:22:56 pm »

Just wanted to share the results of a camshaft degreeing verification procedure I did in a 289 .040" over. Since finding true TDC is the most key event in such a procedure, it doesn't make sense to not take the little added time and not do some camshaft lobes profile checking.

I found out that the the exhaust lobe in this case was changed for a longer duration with less lift profile over the advertised specs and the results did show that the lobe masters of that grind are from Crane. An old chevy base-circle for the intake and a LS base circle for the exhaust.

The advertised Stage 3 cam specs @.050" are:

236/248 .359"/.372" lobe lift (.574"/.595" w/1.6 rockers) 110 LSA +4 ICL @106 ATDC

In this case I found:
235/244 .359"/.346" (.574"/.554" w/1.6 rockers) 110.75 LSA + 2.25 ICL @108.5 ATDC

I took the valve open/close events @.050" and the ones for the .100", .150", .200", .300" in order to make a little exercise. From those results, the Crane lobe masters I was able to ID and the results are shown in the pic below:


I also tried to picture the lobe open/close rates using those results calculating the "lift/degree" based on those results. First one would be the increments of the readings taken per lift point and the "_T" version is the one we usually do using the @.050" opening - ICL/ECL - @.050" closing rates. Obviously, with no "smoothing" of the curves. The intake/Exhaust are shown below for comparison:


When we close into the resulting overlap triangle @.050" of +18°, the lobes lift show how different it is.


I did "reproduce" the lobes with cam analyzer focusing on the 0.050" and 0.200 duration results, and these were the @.050" lift bells:


 What I meant to say was... you do not know how your engine is setup unless you perform a cam degree and figure it out + understand it. Just like gapping the rings per cylinder/piston or checking main and rod clearances.  Asking
Logged

ACRONYMS:
LUK  LMK  JIC  BTSTDTRT  YCYDYP  NFI-YTM  SPOBI, and the classic... DILLIGAS

'86 Mustang GT, X-303 cam, Holley DP 700, RG Tran., 289 Heads   Ford Smilie 2


Quote from: Joel5.0
The right to be stupid is inalienable for sure however, there is no such thing as a right to impose stupidity onto others
Great Thoughts will Overwhelm a Feeble Mind
There is never money to do it right, but there's always money to do it over.
Knowledge based on external evidence is unreliable.
He, who doesn't ask, does not deserve an answer.
A mind is like a parachute it only works when it is open.  (oldmanjoe)
If you can't explain it simply, you don't understand it well enough. (Albert Einstein)
Tuning on a Dyno for the track, is like swim practice in a bathtub.
I can explain it for you, but I can't understand it for you. (90lxcoupe)
The proof of understanding is the ability to explain it. (H. Torruella)
Ignorance is bliss, but stupidity is orgasmic.
Fraud and falsehood only dread examination. Truth invites it. (Samuel Johnson)
The chaotic resistance of the opponents leads to the conclusion that they are not prepared to meet the challenge. The problem is already much more psychological then technological. [Bojidar Djordjev]
Individuals are rational and humane... Crowds are reactionary and barbaric. (Jason)
The person who says it cannot be done should not interrupt the person doing it. –Chinese Proverb
Nothing sways the stupid more than arguments they can't understand - Cardinal de Retz
boofhead
4 Banger
*
Offline Offline

Posts: 16

Location:

« Reply #1 on: June 14, 2016, 09:10:53 pm »

Good analysis. Thanks for posting. Did the part number change?

So does this imply that the exhaust lobes for the other profiles (such as TS 2) would also have revised exhaust lobes?  In any case, interesting data. Thanks.
Logged
Pages: [1] Go Up Print 
« previous next »
Jump to:  



Powered by MySQL Powered by PHP Valid XHTML 1.0! Valid CSS!
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines



408 Stroker