Gains from going from 224/224 cam to 228/236 cam?
01-09-2004, 02:50 PM
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Gains from going from 224/224 cam to 228/236 cam? I'm thinking about going from a 224/224 .581/.581 112 LSA +4 cam to a 228/236 .585/.575 114 LSA cam. How much power am I looking to gain if any at all?
01-09-2004, 05:14 PM
#5
You will be loosing overlap with the 114, but gaining 4 degrees of intake duration. Then again, the added exaust duration will add overlap, so you might break even on the overlap. All in all, if the only thing you gain is 4 degrees of intake duration, I'd say about 8 rwhp and a slightly better idle.
Calculations: (224+224)-(112x2)=0 degrees of overlap
(228+236)-(114x2)=4 degrees of overlap
If this is right, you will gain overlap also, so maybe 10-12rwhp.
Calculations: (224+224)-(112x2)=0 degrees of overlap
(228+236)-(114x2)=4 degrees of overlap
If this is right, you will gain overlap also, so maybe 10-12rwhp.
Last edited by Beast96Z; 01-09-2004 at 05:22 PM.
01-09-2004, 09:45 PM
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I had contemplated this swap myself....but am very pleased w/ the TR224. Not worth retuning and all for small SOTP gain. It is kinda nice to be "done". Well except for the 125 jets, 17" ET's and lift I am putting in....daughter has to park somewhere 
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01-09-2004, 10:33 PM
#8
Originally Posted by jRaskell
I don't believe this is correct. The LSA is the angle between the Intake and Exhaust centerlines. with a 224 duration, your port opens and closes 112* before and after the centerline. So the Intake port closes 112* after it's centerline. The exhaust port opens 112* before it's center. The exhaust starts to open at the ICL and the intake closes at the ECL and the two centerlines are 112* apart, so there is 112* of overlap.
The 228/236 114. Intake closes 114* after it's centerline. the Exhaust port opens 118* before it's centerline. They are seperated by 114*. The Exhaust opens 4* before the ICL, and the intake closes at the ECL (114* after the ICL). 118* of total overlap.
So you have gained 6* of overlap from the 224 to the 228/236.
To the best of my knowledge. If I am mistaken, please correct me.
The 228/236 114. Intake closes 114* after it's centerline. the Exhaust port opens 118* before it's centerline. They are seperated by 114*. The Exhaust opens 4* before the ICL, and the intake closes at the ECL (114* after the ICL). 118* of total overlap.
So you have gained 6* of overlap from the 224 to the 228/236.
To the best of my knowledge. If I am mistaken, please correct me.
Last edited by Beast96Z; 01-09-2004 at 10:43 PM.
