[QUOTE=djl;16494265][QUOTE=HardLuck71;16492317]I really appreciate your feedback. I used the .003 cause that's what it says on the piston spec sheet, and the thing is, I have the pistons that come with the 98" kit ( 10cc ) I just thought they were 3cc as that's what it said on their site which was an error on their site ( example below ). The 543's I have are chain drive and I was also looking at the 4* gear too. Along with that, I already have TC3 Cam plate & Oil pump, Hydraulic tensioners, Quickee pushrods and hydraulic lifters ( all S&S )Like I said before, I'm pretty new to all this. So I know that it will move the Intake closing from 43 to 47 and I take it that it also moves the Exhaust? What kind of a difference does this make with performance, does it move the torque to the right, so maybe instead of the cam starting at 2200, it starts at 2500-2600? Thanks

 

[QUOTE=HardLuck71;16495739]A moot point. You already recognize that 9.8 corrected CR/204psi CCP (first BB calculation) is not desirable for a "street" build; some might run it but I would not. I would have no issues running 9.6 corrected CR/197psi CCP (second BB calculation) but you seem to have some concern with that configuration. So, I am simply suggesting a way to drop corrected CR and CCP by retarding timing 4* and saving machine work or a cam replacement and minimizing down time. The curve will be what it will be but at 9.4/194psi and a good tune, I would guess that the curve will be just fine and provide plenty of bottom end. Not being familiar with the Reaper cams, I can't tell you when the TQ will cross the 100 line but most of these motors setup at 9.4/190+psi have plenty of torque early.

That's all I got guy, I believe all the options are on the table and you just have to decide how much compression you can live with and figure out how to get there.

 

[QUOTE=djl;16494265][QUOTE=HardLuck71;16492317]I really appreciate your feedback. I used the .003 cause that's what it says on the piston spec sheet, and the thing is, I have the pistons that come with the 98" kit ( 10cc ) I just thought they were 3cc as that's what it said on their site which was an error on their site ( example below ). The 543's I have are chain drive and I was also looking at the 4* gear too. Along with that, I already have TC3 Cam plate & Oil pump, Hydraulic tensioners, Quickee pushrods and hydraulic lifters ( all S&S )[QUOTE]

[QUOTE]=djl; A moot point. You already recognize that 9.8 corrected CR/204psi CCP (first BB calculation) is not desirable for a "street" build; some might run it but I would not. I would have no issues running 9.6 corrected CR/197psi CCP (second BB calculation) but you seem to have some concern with that configuration. So, I am simply suggesting a way to drop corrected CR and CCP by retarding timing 4* and saving machine work or a cam replacement and minimizing down time. The curve will be what it will be but at 9.4/194psi and a good tune, I would guess that the curve will be just fine and provide plenty of bottom end. Not being familiar with the Reaper cams, I can't tell you when the TQ will cross the 100 line but most of these motors setup at 9.4/190+psi have plenty of torque early.


I understand and I thank you for all your help! It's not that I won't run it at 9.6, I'm just a worry wart and over think things sometimes. I just wanna go it right the first time. So, I called Feuling to speak to a tech guy ( Evan ) and find out the best comp for the 543's and then told him about my situation. To my surprise, he said that he's sorry to hear about what happened and that I could send him my 543's and he would send me the 574's ( even tho I purchased mine through a 3rd party ) and he would also eat the shipping charges. I couldn't believe that he ( Feuling ) would go out of the way to help me out, now that's what I call customer service! All I know is from now on, Feuling has a customer and I can't thank them enough for trying to help me out. I know there's only a 2* difference, but it helps me out some.

 

That's not going to resolve your problem and will move the numbers to the right.... 2* is only -2.4 psi.... still the wrong cam.....

 

I would stick with the 543 cams and set the motor up at a corrected CR of 9.4-9.6; you figure out how to get there. You still have compression issues with the 574s that will have to be addressed.

 

I'm done trying to figure it out, with the 574'3 I got to 10.68 Static, 9.58 Corrected with 197 ccp, so I'm just gonna run with that

 

Well, at least you made a decision. Looking at the upside, you have some room to "grow". The stock heads will not take advantage of the benefits of the "longer" 574 cams so head work and more throttle body are possible future upgrades that will increase performance with little effort.

 

I'm sending my heads out and looking at 55mm throttle body. Honestly, I'll have to research to find out which size would be best.

 

JMHO but I think the SE50mm would be up to the task; have the intake port matched to the heads.

 

Thanks, I'll take a look at that one too