I am currently building a gsr all motor. I want to run Skunk2 Pro Series Stage 3 cams. But i was talking to someone and they said there too high i wont have enough vacum for the brakes. I dont quite understand if anyone could help it would be great.

 

whats your build going to consist of?

 

right now im just building the head. So far it port n polish 5 angle valve job. Skunk2 valves and retainers. Just need to know if i can run them cams or should i go smaller.

 

What are going to run for a bottom end?(bore size) What compression? Those are going to be the biggest factors on cam size. A ported head will help. Which you say you have.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itgsr98 &raquo;</TD></TR><TR><TD CLASS="quote">What are going to run for a bottom end?(bore size) What compression? Those are going to be the biggest factors on cam size. A ported head will help. Which you say you have.</TD></TR></TABLE>

a badly ported head will really help

 

judging by the limited information you have given us thus far im saying that pro 3s are not going to suit you.
a ported head does not equal running pro 3s.

 

I dont think many people realize how "big" of a cam the Pro3 is. I know there are exception to every rule- but my bro ran that in is 86mm, 15:1cr, rlz head - all motor setup. You cant just slap that cam on 1.8l block , throw a tiny bit of compression at it and expect to move it. At least that is just my opinion.

If you plan on building the block to a decent size with a nice compression number i say go for it.
If not - Pro 1 or 2s may be better suited for the build.

Now as far as the vaccuum question goes, i think there is a bigger question that needs to be asked- is this still a street car ?

as always this IS honda-tech and it IS just my personal opinion- so take it with a grain of salt

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2fastGSR &raquo;</TD></TR><TR><TD CLASS="quote">I dont think many people realize how "big" of a cam the Pro3 is. I know there are exception to every rule- but my bro ran that in is 86mm, 15:1cr, rlz head - all motor setup. You cant just slap that cam on 1.8l block , throw a tiny bit of compression at it and expect to move it. At least that is just my opinion.</TD></TR></TABLE>

this isnt your opinion its the consensus.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1 2 NV &raquo;</TD></TR><TR><TD CLASS="quote">

this isnt your opinion its the consensus. </TD></TR></TABLE>

touche' sir. . . . touche'

i put that in there because i know someone on this lovely site would chime in and say well a friend of a friend's brother in law's mother's friend ran them on his stock block on the street. Thats all

 

ill know how pro 3s are when i put them in my motor when it gets warmer. 13+CR RLZ head, victor X IM. should be good.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2fastGSR &raquo;</TD></TR><TR><TD CLASS="quote">

touche' sir. . . . touche'

i put that in there because i know someone on this lovely site would chime in and say well a friend of a friend's brother in law's mother's friend ran them on his stock block on the street. Thats all </TD></TR></TABLE>

i saw a 81X89 car with ctr pistons and pro3... lol

 

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

i saw a 81X89 car with ctr pistons and pro3... lol</TD></TR></TABLE>

you son of a . . . . .

 

it made mad powah fo sho

 

Just to clarify my post above, bore and compression are the two biggest factors when making your cam selection. At least it was for me. A GOOD ported head will only compliment the over all torque and horsepower of your setup. I'm running pro2's in my 84mm/11.5 comp. motor and that's the biggest i would run with this perticular setup. I put down 224whp/150tq. This was with an unported b16 head. So by me having the head ported i should see an increase in power and torque. At least that's the plan. Lol.

 

All that vacuum stuff is BS. It will shift where the car idles in your load VS RPM table, but with proper tuning it will warmup and idle like stock. Like mine.

I wouldn't recommend Pro3's for a 1.8-1.9L motor unless you were running crazy compression (14:1+).

Pro3's work wonderfully for my motor. 85x87.2 @ 12:1. Killed Pro2's and BC5's.

 

So the best thing to do would be bore the block to a 2.0 and what compression?

 

honestly if you have to ask, you dont need pro 3s period.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1 2 NV &raquo;</TD></TR><TR><TD CLASS="quote">honestly if you have to ask, you dont need pro 3s period.</TD></TR></TABLE>
X2, i have the pro2's and im scare of using it... too much clearence issue u have to triple look for in my build, 84.5mm/13+CR, so i just sold my 2.0 block, going turbo now...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B16ef91 &raquo;</TD></TR><TR><TD CLASS="quote"> </TD></TR></TABLE>

Seriously man, cut that **** out. You've lost 3% in the 3 days you've been on the site.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1 2 NV &raquo;</TD></TR><TR><TD CLASS="quote">honestly if you have to ask, you dont need pro 3s period.</TD></TR></TABLE>

so your telling me if you didnt know you are not willing to find out what it takes to run those cams, regardless if you need to or not most the things we do to our cars we dont need it but, we want it and i thought thats what HT was for questions not if you dont know dont do it...

 

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

so your telling me if you didnt know you are not willing to find out what it takes to run those cams, regardless if you need to or not most the things we do to our cars we dont need it but, we want it and i thought thats what HT was for questions not if you dont know dont do it... </TD></TR></TABLE>

let me put it this way, you will probably never have a motor that is going to be able to handle the pro 3's. Unless its strickly a drag car. The pro series are wayy different than the regular series. Id say stick with pro 1's and ull be fine. People have been know to actually loose power when the put the PRO 2's in becausr the cam is just to big for the motor.

 

ive said it 100Xs before. people are still used to this "stage 1, 2 and 3" BS. the pro 1 are fairly equal to what used to be the old "stage 2" sized cams and i dont think people realize this often times when they pick out a cam.
even with the pro 1s your talking about a pretty serious cam that will still make decent power in a smaller motor. pro 2s with a slightly built motor will make better. to step up to pro 3s you need a 2L minimum IMO.
when you make the jump to the pro 2s your talking about a serious cam. any big cam can have clearance issues. however, when you jump into the pro 2s and 3s you are running into serious V2V issues first and foremost. then you can run into P2V issues but with most aftermarket pistons you shouldnt have much of a problem.
since most people dont know how to properly check V2V they will have problems from just about the first time they start up their motor.
then to just reiterate what im rambling about you have some possibilities of R2VS issues. i know i run Pro 2s currently and have Pro 3s on my shelf. my retainers have been shaved 1 time already for the pro 2s and im suspecting ill have to shave them again from the bigger pro 3s.
if you just took the time to check V2V first it would take 10min tops to figure it out. then degree the cams in and you will pretty much be on your way. this brings me back to having aftermarket pistons. unless you have rediculously close P2DH and run a thin headgasket you should be ok.
just some food for thought for people that arent understanding.

 

good stuff, but its weird how in one thread they say should not be a DD and in the other they say with the right motor pro 2 should be fine for DD , but what you say makes sense so

 

i dont understand whats wrong with any of these VTEC cams being DD. for one you are riding on the primary and secondary lobes 99.9% of the time. two if you have a properly built motor to run these cams it just shows how dedicated you are to having a car that is capable of utilizing these cams.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Green98Integra &raquo;</TD></TR><TR><TD CLASS="quote">I am currently building a gsr all motor. I want to run Skunk2 Pro3 cams. .</TD></TR></TABLE>

I must of over looked it, or something. But is this going to be a daily driver? Are you trying to stay with a 1.8L? What pistons are you going to use.

And who is doing your head work. Just trying to get up to speed on whats going on here.
But from what i did read. Sounds like your a prime canadate for Pro1's really.