Well, here is the problem, I would like to tune my car. I understand the timing and cam degree's but just curious as to what exactly is overlap, what are the benefits/downfalls. How would I dial it in to see if it would work, and just a clear explanation of the term. This is on a B16A2 with skunk 2 cams/ gears. Thanks.

Nick.

 

overlap is when the intake and exhaust valves are opened at the same time

 

on a N/A motor overlap is good because you want to let the motor breathe as much as possible....with FI, all overlap does is dump you precious boost out the tailpipe

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by z6 &raquo;</TD></TR><TR><TD CLASS="quote">overlap is when the intake and exhaust valves are opened at the same time</TD></TR></TABLE>


Ok, I understand this, now how is this made possible? Are both the exhaust and intake cams set at the same degree? I am still fuzzy on how this is accomplished.

Nick.

Thanks for the quick answer.

 

Elgin Cams - Tech paper

Another Tech article

TPRs' tech article

 

u shouldnt be tuning your own car

 

Why should I not tune my own car? I understand the basics just need a little clarification on the idea of overlap. Anyone else?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Civichatch2k &raquo;</TD></TR><TR><TD CLASS="quote">Why should I not tune my own car?</TD></TR></TABLE>

Because in the same breath you say "I understand the timing and cam degree's" and then say "but just curious as to what exactly is overlap". Then you smack us with this "Are both the exhaust and intake cams set at the same degree?" and "I understand the basics"

What is it that you still need clarification on? Aside from the links I've provided and the casual explanation of "when both valves are open", whats not clear?

 

I understand what you are saying. dually noted.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EE_Chris &raquo;</TD></TR><TR><TD CLASS="quote">

Because in the same breath you say "I understand the timing and cam degree's" and then say "but just curious as to what exactly is overlap". Then you smack us with this "Are both the exhaust and intake cams set at the same degree?" and "I understand the basics"

What is it that you still need clarification on? Aside from the links I've provided and the casual explanation of "when both valves are open", whats not clear?</TD></TR></TABLE>

How else would you learn if you dont do it yourself? Or if you dont ask.
Give the guy a break and just tell him what he wants to know. DAMN.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Civichatch2k &raquo;</TD></TR><TR><TD CLASS="quote">... now how is this made possible? Are both the exhaust and intake cams set at the same degree? I am still fuzzy on how this is accomplished.</TD></TR></TABLE>The overlap can be designed into the shape of the cam lobes in the first place. For example if you're designing a camshaft from scratch, you can shape it so there's a little bit of overlap between the lobes.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mandopr77 &raquo;</TD></TR><TR><TD CLASS="quote">Give the guy a break and just tell him what he wants to know. DAMN.</TD></TR></TABLE>

And YOUR explanation is where? I've provided links and I've asked what more he would like to know.

Why don't YOU go ahead and answer the mans Q since you seem to know more of what he's looking for...I'm not a mind reader and his initial Q has been answered.

DAMN...right on back at ya'.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EE_Chris &raquo;</TD></TR><TR><TD CLASS="quote">

And YOUR explanation is where? I've provided links and I've asked what more he would like to know.

Why don't YOU go ahead and answer the mans Q since you seem to know more of what he's looking for...I'm not a mind reader and his initial Q has been answered.

DAMN...right on back at ya'.
</TD></TR></TABLE>

I never said I knew the answer to his questions. I was mearly implying that you were once i his shoes as well. You were not born with this knowledge it was learned some way or another. We are here to help one another not cop an attitude when someone doesnt immediately understand what you are telling them or what they are reading. Relax!

Mean people suck!

There is always an ******* in every forum.

 

I agree that EE_Chris's comments sound like they were rude but he and I have been talking and he has explained that is not what was meant and has thus clarified the situation.

He is a good guy and he explained the answer to my questions. Thanks Chris and thanks H-T!

 

Sounds good! I just get upset at some people on this forum that thinks that everyone is stupid and they are so smart.

I apoligize. I guess writing instead of speaking can be easily misunderstood.

I am glad he helped you. Thats what we are all here for!