need help for cam info please!

[lazystang]

hi,I recently bought a used 302 that the previous owner had rebuilt,it was for a 84carburated mustang I was planning on dumping it in my 92 efi.long story short
the cam is the EDL-7122 hydrolic flat tappet,now on the edelbrock site they have it listed as NOT COMPUTER COMPATIBLE does this mean it will not fit my efi setup??? any help would be really appreciated,thanks

 

[jtfairlane]

That is the Performer RPM cam designed for early 289-302 that came from the factory with flat tappet (non-roller) cams.

That cam has a ton of adv. duration. Comparatively, the largest cam in Comp's Xtreme Energy hyd. roller series for computer controlled cars has less advertised duration than that.

That cam should really only be used in a non-computer controlled vehicle.

 

[lazystang]

but will it do any harm?or would I be better off changing it?the setup is:
-keith black pistons .40 over
-ported edelbrock performer heads 2.02 valves
-svo 1.6 roller rockers
-performer rpm II intake

 

[PUNISHER RACING]

That will not hurt anything at all and will prolly haul serious ass. The specs are only 224/[email protected] with .496/.520 lift. That duration is a little tall but nothing major as long as you have mass air it will be fine. I would suggest a 3.73 or 4.10 gear though. Have fun!!!

 

[lazystang]

Now that's the kind of news i wanted!I really wasn't sure when I checked the cam specs, was getting a little nervous,thanks a bunch for your reply.3.73's just got them this week!
what size maf meter and throttle body would I be better off with?

 

[vristang]

Check the firing order of the cam...

Other than that, I wouldn't try to guess at how it will run... to many variables....

 

[lazystang]

ok,since their's no way of fixing this properly, I've decided to switch to roller cam
could any of you give me a hand in telling me what i'll need to switch from flat tappet to roller?

 

[PUNISHER RACING]

I got dibs on the old camshaft!!!!!!!!!!!!!!!!!!!

 

[lazystang]

I got dibs on the old camshaft!!!!!!!!!!!!!!!!!!!

ha!ha!it's just I'm not sure the cam will work on efi because like i was told to check the firing order and it's not the same as HO firing order but i also read that the only way to fix it is to chip the computer

 

[PUNISHER RACING]

i don't know about all that I was always told as long as the dizzy matched the camshaft you were GTG!!! Get ahold of the Wizard he will clear this up!!!!!!
(do I still have dibs)

 

[vristang]

With efi the injectors are fired in order. If the injector firing order doesn't match the firing order of the cam, then problems can come up....
A chip *should* be able to fix this, but I've never tried it, and haven't heard from anyone who has...


If the block is a non roller block, then for a hyd roller cam to work, you will need the expensive 'link-bar' lifters...

If this is a temporary build, then you could just find a flat tappet cam with the right firing order... that may be the cheapest option to do it right...

 

[v8only]

a flat tappet 84 block?!

try again and start off with a roller block.

 

[lazystang]

a flat tappet 84 block?!

try again and start off with a roller block.

I didn't know there was a difference and starting over isn't really an option..I'm not a doctor or a lawyer..I just don't have that kind of money

 

[lazystang]

what if i install the retrofit kit with the spider and dogbones for the lifters with the right length pushrods and get a retro fit cam
looking around summit i found this one
CCA-35-427-8 xtreme energy retro-fit
rpm range 2,500-6500
adv. dur.294/300 lift 0.576/0.600
would this setup work??? any advice is still very much appreciated!

 

[v8only]

MASSIVE hp difference between the two styles. A stock 5.0 roller will put out 225 horse, vs a stock flat tappet, around 170.

it's cheap to find a roller block, $200-$400 all day.

you can retrofit your exisiting block, but it may wind up costing you the same as replacing it.

 

[vristang]

what if i install the retrofit kit with the spider and dogbones for the lifters with the right length pushrods and get a retro fit cam
looking around summit i found this one
CCA-35-427-8 xtreme energy retro-fit
rpm range 2,500-6500
adv. dur.294/300 lift 0.576/0.600
would this setup work??? any advice is still very much appreciated!

Most retrofit cams are ground on a reduced base circle...
There can be issues with the reduced base cams, especially in performance applications...

My suggestion...
Either run the expensive link bar hyd lifters (which allows use of a standard base circle cam), or use one of the following...
Hyd flat
solid flat
solid roller

all of those should fit without issue...



Here is a pic of a standard cam next to a reduced base cam....
(standard on the left, reduced on the right)

 

[lazystang]

were could i find hyd flat that has HO firing order
i looked around but just couldn't find any

 

[PUNISHER RACING]

a flat tappet 351 windsor camshaft has the 13726548 firing order just get a comp x treme energy for a 351 flat tappet