So far this is what I'm getting for my new build:
Eagle rods
CP 12:5.1 standard bore (as long as my block is fine that I have)
Clevite bearings
Ferrea spring and retainer kit
stainless high comp valves ( might bump comp by .2 to .3 I think)

Gonna prob be around 12:8.1 comp Not sure if will be ok on pump gas? What do u think?

 

As long as you have it tuned well, you can run it on pump gas. But 12.8:1 is pretty extreme. You should look up dynamic compression ratio and see how high compression on small cams can hurt power and vice versa. When you go with higher compression, you also got go with bigger cams. It's a big mistake I see around here and ppl don't realize how it affects their power.

 

Bump. More oppinions please.

 

12.8:1, what cams?

 

pump gas with octane boost might get away with it

 

I sm running that compression but if your sticking with small cams it is a mistake because alot of compression does not mean big power in fact it will hurt power because you will have to tune timing out of the ecu and it better to have a motor that can run full timing on pump gas than have one that you have to retard the timing . If your going with bigger cams then it will be a better combo , because the cranking and low end cylinder pressure or like was said dynamic pressure is reduced and low speed and will be less prone to detonate and the compression will also give better throttle response . It all depends on your motor combo , but yes you can run that compression on pump gas , I have been for 28K miles now .

 

what cams u recommend?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FastAssEG &raquo;</TD></TR><TR><TD CLASS="quote">what cams u recommend?</TD></TR></TABLE>

Your asking TodaSi what cams he recommends? Toda C's or D's

If you run about 12.0:1 then Toda A's

 

i would never go over 11.5 on pump gas
but hey thats only me
you can run 12:1 13:1 or whatever you want

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Highrevs99 &raquo;</TD></TR><TR><TD CLASS="quote"> I sm running that compression but if your sticking with small cams it is a mistake because alot of compression does not mean big power in fact it will hurt power because you will have to tune timing out of the ecu and it better to have a motor that can run full timing on pump gas than have one that you have to retard the timing . If your going with bigger cams then it will be a better combo , because the cranking and low end cylinder pressure or like was said dynamic pressure is reduced and low speed and will be less prone to detonate and the compression will also give better throttle response . It all depends on your motor combo , but yes you can run that compression on pump gas , I have been for 28K miles now .</TD></TR></TABLE>

what cams u recommend?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FastAssEG &raquo;</TD></TR><TR><TD CLASS="quote">So far this is what I'm getting for my new build:
Eagle rods
CP 12:5.1 standard bore (as long as my block is fine that I have)
Clevite bearings
Ferrea spring and retainer kit
stainless high comp valves ( might bump comp by .2 to .3 I think)

Gonna prob be around 12:8.1 comp Not sure if will be ok on pump gas? What do u think?
</TD></TR></TABLE>

a friend of mine made 196whp on CTR Cams & pistons...... you need to get tuned. Yes it is possible. Its not all about the tuning, your style of driving needs to change as well. so no up hill in 5th gear for you...

 

I like Todas because they have aggressive non vtec lobes and with high compression they make good midrange power and idle fine , at least mine has about stock idle with 12.5 . You can run any cam you wish but a cam with bigger pri-sec will bleed a little of the compression off at low speed even though you can do that with CTR a little by giving them more overlap with cam gears . One thing about high compression is it can be a pain in the *** but you do have the option to run race gas and turn timing up and make more power , with low you dont have that option , with small cams the power will be small ( 5 whp or so ) but with a larger cams like Toda , Jun or even Skunk , the power can increase more like 10-15 whp . Oh and you will notice good light throttle , I can go up a hill in 5th but I dont give it more than 16% throttle .

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by salbaje &raquo;</TD></TR><TR><TD CLASS="quote">pump gas with octane boost might get away with it</TD></TR></TABLE>
my friend run his crv/vtec with 12:9:1 comp on 94 pump gas just fine.
been running for about 10 months now.
so your 93 with octane boost should be just fine

 

untuned or tuned?

 

no

 

i'm planning on running ib wiseco's 12.8:1 on 92+ pump gas on a stock bore. i won't have the cams i want yet but i am going to be getting the jun 3's. not enough compression for the new 4's.

 

you know with high lift cams, you cant run oversized valves right?

and if you dont plan on using high cams, then whats the point

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hybridvteceg &raquo;</TD></TR><TR><TD CLASS="quote">you know with high lift cams, you cant run oversized valves right?

and if you dont plan on using high cams, then whats the point</TD></TR></TABLE>

They are not oversized valves. If they were I would have said so. I plan on getting skunk2 stage 2 cams. I didn't think it mattered me mentioning that. That's the point.

 

12:8.1 = 1.5:1

not sure if you wrote that by accident... but you made the mistake a few times

 

oh flat valves?, ok