Dammm Cammm

[jwillburn119]

okay... going on 1.7 rockers... good springs... intake(manifold), throttle body, lifters, headers... already forged internals and 3.73 gears( T5), would i be safe running cam .544 .544 lift with 224int 230exh (ACTUAL)DUR, and 112 LSA? with stock injectors and stock program?



COMP PART NUMBER CL35-328-8

[coupe]

That's one of those things you'll have to check with clay/putty. It might be close, depending on the piston notches.

[QWKSNKE]

not sure what you are asking.

Are you asking is it safe to run 1.7's on that big of a cam or are you asking would it be safe on stock EEC and fuel system?

[jwillburn119]

yeah... not will it be safe so much as will it run on stock EEC program, and i know it will run on stock injectors now

[One_live95]

it should run decent with the stock computer tune..... no chip


I would definitely do what coupe suggested though, even if that wasn't what you were asking, i have a mid compression motor..(heads milled a good bit), and my b-cam with the 1.7's was just over the tolerances you want for PTV clearance...


jason

[QWKSNKE]

that is a good bit of cam to be used with 1.7 rockers. Depending on how deep your valve reliefs are in your pistons you could be asking for trouble.

Stock EEC will do ok but not as much as what a custom tune would do for you

[jwillburn119]

im gonna tune it, but i just dropped 2000 into it... so yeah... well i have stock mill heads, but my pistons are speed pro 11:1, but have a deeper valve relief than stock... i am 99 percent positive i will be okay... dont really want to pull the heads either. what do yall think?

[qkjuicedpony]

speed pro pistons.what size valves in your heads...if they are stock it will be very close.you cannot run 1.7 rockers with that cam or it will hit.that cam is advertised as a .544 lift WITH a 1.6 rocker.....with a 1.7 it will hit

[slvrbullit]

speed pro pistons.what size valves in your heads...if they are stock it will be very close.you cannot run 1.7 rockers with that cam or it will hit.that cam is advertised as a .544 lift WITH a 1.6 rocker.....with a 1.7 it will hit


That cam is made for 1.7's take the .32 and multiply it times 1.7 and it comes out to .544. For reference I am runnin a .564/.533 lift cam. I have DSS flat tops and my heads have been milled twice.

[qkjuicedpony]

That cam is made for 1.7's take the .32 and multiply it times 1.7 and it comes out to .544. For reference I am runnin a .564/.533 lift cam. I have DSS flat tops and my heads have been milled twice.


im willing to bet it will hit.

i had the same speed pro pistons once with an x303 cam(.542 lift)and with 1.6's and stock sized valves it was very close.....so close in fact that on a missed shift i broke a few valves and some pistons:D

[jwillburn119]

still running stock valves... this cam is made for 1.7s i called comp and they told me that... what they wouldnt tell me is whether it will clear... but the cam reads .544 with 1.7s

[1sicklx]

I would check the clearance for myself before running it just to be on the safe side.

[One_live95]

:yup: they wouldn't tell you it would clear, b/c they didn't want them to hit and you call them back up asking why they told you it would clear. liability

if they hit you will be pulling the heads , head gaskets machine work etc. plus getting some valves, However if you go ahead and pull them and clay the pistons its only head gaskets.... i think if you are looking at cost factor that i would still pull them and check or run a cam i know would work...



jason

[coupe]

or get 1.6 ?

[jwillburn119]

alright... im gonna pull a head... do a clearance check...

next question... what is minimum allowed clearance???? anybody, somebody?

the only thing i can find, or i know is... NOT TOUCHING

[qkjuicedpony]

please detail your whole combo.......i may have another cam recommendation.

[jwillburn119]

it is BBK's new intake, (against all recomendations) flowtech headers, FRPP 1.7:1 ratio pedistal rockers, FRPP lifters, comp rods, comp dual springs good to .565, at 1.275 bind, speedpro pistons at 11:1, I BEAM rods and crank from scat,S A GEAR true double roller chain, with stock block, stock heads, stock valves, stock T5, and 3.73 gears, and the cam?

Grind Number FW XE276HR-12
Description




Gross Valve Lift 0.544 0.544
Duration At 0.006 Tappet Lift 276 282



Valve Timing At 0.006 OPEN/ CLOSE

Intake 30 /66
Exhaust 77 /25


Installed At 108 Intake CL INT / EXH

Duration At 0.05 224 / 230
Lobe Lift 0.32 0.32
Lobe Separation 112

the key here is .32

formula for GROSS valve lift is lobe lift times lifter ratio right?

1.7x.32=?????
hint??? .544... so this was made for 1.7 lifters... makes power between 1800 and 6500(same as INTAKE)

what is your suggestion

[qkjuicedpony]

i personally think that cam is TOO big for the combo you have...granted you have several good parts but you are still trying to flow through stock heads and stock valves....at .544 lift that cam wouold hurt you more than it would help you.since you are using stock heads if you are on a budget and want to save some cash until you can buy a better set of heads i would recommend a b303 cam with some 1.7 rockers.some people do not care for these motorsport cams but i have made well over 300rwhp with this cam and a stock bottom end.

other cam choices could be
E303
F303
Trick flow stage 1


these are just my suggestions.you could use them with the 1.7 rockers and be fine without checking clearance and still make plenty of power

[jwillburn119]

okay... i am looking at a 108 and a 107 degree LSA on both of those cams... that seems hardly streetable... either the B or the F... why is it that this cam would hurt me so bad i didnt think the head flow... or valve flow was that bad? i only have until 1000 pm to change the cam then they ship it

[qkjuicedpony]

the heads unported with stock valves do not flow all that great.like i said you could put that cam in there but i still believe it is too big for your combo.these are just suggestions as stated.but here is an example


my fathers car has the exact same pistons as you with stock crank and rods,stock heads with a three angle valve job and .550 springs.the heads are unported and the valves are stock.it has a typhoon intake(unported),24#inj,70mmtb,76mm mass air,underdrives,equal length shorties,off road h pipe

has an e303 cam and still has a/c,power steering full options and leather.....makes good power and runs 8.30's in the 1/8th on radials


like i said i am just suggesting a smaller cam.

ive seen 335rwhp with an f303 N/A

also a lunati 51014 would work good

[jwillburn119]

i want the suggestions... im all but stuck with the cam though...

i guess what i want to know is if it will run with the cam... i will think about going with the f cam... i just dont understand why comp would tell me to run this one if its so far off...

[QWKSNKE]

What qkjuiced is saying...

Your current cam will not be optimized for your current combo. You would make better power with the smaller cam such as the b or e cam.

With that being said, the other item that is being discussed is that unless your current cam is designed for 1.7 rockers (i.e. the .544 lift is with 1.7's instead of 1.6's) you may have valve to piston contact because the lift is changed a good bit on that cam with a 1.7 ratio rocker if it the lift is combination with cam and 1.6 rocker arm.

[jwillburn119]

What qkjuiced is saying...

Your current cam will not be optimized for your current combo. You would make better power with the smaller cam such as the b or e cam.

With that being said, the other item that is being discussed is that unless your current cam is designed for 1.7 rockers (i.e. the .544 lift is with 1.7's instead of 1.6's) you may have valve to piston contact because the lift is changed a good bit on that cam with a 1.7 ratio rocker if it the lift is combination with cam and 1.6 rocker arm.


i understand the valve contact problem... if you look the specs i have below... it is .544 with a 1.7 lifter... not a 1.6... by the math... not heresay... thats what i want to know... will .544 valve lift contact the pistons under WOT?
and if the heads are the only thing that is holding me back... thats what i want... that way all i have to do is buy the heads later

[qkjuicedpony]

go ahead and put the cam in.clay the pistons and see what the clearance is

if its under.100 then it may hit if you ever miss a shift and go the limiter....and if you go to bigger heads with that cam you will need to have the pistons cut bigger since the speed pro pistons are only cut for stock valve sizes

[QWKSNKE]

Without telling you for sure that it will work.....

My cobra with stock pistons worked with a .544 lift cam without any problems. Duration was 218 intake, 228 exhaust (actual)

[jwillburn119]

yeah i knew that i would have to change pistons... thanks for the help... if it doesnt work i will stand stupid... and you are probably right... should have asked before i bought the cam... but im already locked in...

keep an eye out i might be trading for an F cam soon!!!