obviously the first step is replacing the head gasket ,
checking the head for damage etc. and doing an oil change
as the most critical first step in the repair process ,DONE CORRECTLY!
well before any cam /valve train upgrades!
and do your homework,
don,t just take parts out of the box and install them,
get the valve train geometry and clearances correct,
or your looking at a huge waste of money and doing further repairs.
failure to verify the
valve train geometry and clearances and just install parts,
is almost sure to cause potential problems you might consider a more efficient radiator also,
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advertized duration is a crap shoot and rarely reflects reality!
while lift figures tend to be far more accurate, listed ADVERTIZED duration, tends to vary a bit from reality,
Try hard too deal in lift and duration as listed at .050 duration if comparing cams!
its also a good idea to consult several cam companys techs and ask detailed questions
\
read the links and sub links carefully
(and any related info, as it will help you make informed choices)
yeah I know 90% of the people reading the thread, will skip over the linked info as fast as they can,
in the long term this is sure to reduce the knowledge they require to make better choices.
As in all areas...the more you know the smarter the choices youll make
is a roller cam worth the extra cost vs a flat tappet design
heres some info from COMP CAMS " Flat Tappet vs. Roller Tappet Lifters theres far more than just the cam and lifters required to swap types of cams, if your engines currently equipped with a flat tappet cam your almost sure to need a new timing chain set cam button new push rods obviously a new...
garage.grumpysperformance.com
semi fool proof cam sellection
you can start with this, the SIX cam manufacturers POSTED OR LINKED BELOW that have proven to be dependable, the soft ware below might prove useful, so use it to get a base line INFO YOU NEED IF YOUR selecting the correct cam for YOUR combo FIRST!!>>>>>>ANY AND ALL CAM MANUFACTURERS WILL need...
garage.grumpysperformance.com
dynamic vs static compression
its obvious some of the guys on this site need to understand the difference between static and dynamic compression ratios, and that's understandable as its a difficult concept to grasp at first. your engines tendency to get into detonation is the result of higher effective compression that the...
garage.grumpysperformance.com
how your cam LSA effects your compression ,torque , DCR
TIGHTER 104-110 LSA tend to increase scavenging efficincy but at the cost of less smooth idle LSA lobe separation angle is locked into the cam when its ground and can not change, if its ground at 110,degrees or 114 degrees it will stay that figure and LCA lobe center angle, can be...
garage.grumpysperformance.com
is it peak hp numbers or a good street combo your after?
OK you've decided you can,t live without a killer 383 sbc, you need to select the parts and you want to build an engine you can be proud of, the first question is whats your budget look like, quickly followed by what will you be using the engine for, and do you have the drive train to match...
garage.grumpysperformance.com
sellecting valve springs, and setting up the valve train
How do you determine the spring pressure needed to keep the valves under control for a given lift, duration, and max rpm. It might take you several hours to read thru all the links and sub links but its time very well spent as it could save your engine from destruction and save you thousands of...
garage.grumpysperformance.com
cam wear,articles you need to read
before, you start reading through the thread and links below, Ill point out that I've done the forensics on quite a few failed cams over the years, that guys have brought to my shop and Id say about 60% of the failed cam lobe & lifter problems were traced to a failure to check clearances or...
garage.grumpysperformance.com
provide potential greater effective duration and lift, with less friction losses.
(assuming you do your homework and select a well matched cam and components matching the engines requirements, compression, gearing etc.)
but you can't use the same valve springs,on the heads,valve train geometry differes signficantly, push rods are shorter, . as the roller lifter's are taller and heavier, the combo of components required to swap from flat tappet to full roller can become rather expensive, $1000-$1500 easily once you get the valve springs push rods roller lifters, billet cam core and ideally roller rockers.
for that, cost, the added roller valve train and roller rockers, etc. youll generally gain an additional 25-35 added horse power over a similar duration flat tappet version due to more effective volumetric efficierncy and reduced friction.
considering the average
thus its common to get 25-30 hp from a flat tapet performance cam upgrade and maybe 45-65 hp from a roller cam valve train upgrade
semi fool proof cam sellection
you can start with this, the SIX cam manufacturers POSTED OR LINKED BELOW that have proven to be dependable, the soft ware below might prove useful, so use it to get a base line INFO YOU NEED IF YOUR selecting the correct cam for YOUR combo FIRST!!>>>>>>ANY AND ALL CAM MANUFACTURERS WILL need...
garage.grumpysperformance.com
is a roller cam worth the extra cost vs a flat tappet design
heres some info from COMP CAMS " Flat Tappet vs. Roller Tappet Lifters theres far more than just the cam and lifters required to swap types of cams, if your engines currently equipped with a flat tappet cam your almost sure to need a new timing chain set cam button new push rods obviously a new...
garage.grumpysperformance.com
cast roller cams and high spring pressures don't generally work well
running a cast core roller cam on the street with significantly more than MINIMAL spring pressures for the intended application, IS JUST asking for valve train problems, but a balance must be maintained, if the valve spring is too weak and allows the cam lobe to throw or loft the lifter at...
garage.grumpysperformance.com
sellecting valve springs, and setting up the valve train
How do you determine the spring pressure needed to keep the valves under control for a given lift, duration, and max rpm. It might take you several hours to read thru all the links and sub links but its time very well spent as it could save your engine from destruction and save you thousands of...
garage.grumpysperformance.com
cam wear,articles you need to read
before, you start reading through the thread and links below, Ill point out that I've done the forensics on quite a few failed cams over the years, that guys have brought to my shop and Id say about 60% of the failed cam lobe & lifter problems were traced to a failure to check clearances or...
garage.grumpysperformance.com
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