cam info wanted

S

stroker87

Active Member
last Dyno not tuned 100% engine with currant cam made 285rwhp (before 3000 stall) cam in the engine now is a comp cam hydraulic roller spec’s duration @0.50 218 int./224 exh, valve lift 0.495 int./0.503 exh. lift, 112 LSA
when engine was built I had local EPA to worry about, the laws changed and my truck does not need to be tested any more I would like a cam that is streetable but at the same time make this stroker SCREAM, I do plan on installing a procharger and/or nitrous "if" by doing the cam swap i can get some major power I dont think I will do the blower

Engine:
350 over .030, 3.75 stroke, -16cc pistons, H beam rods & splayed caps 9.8 to 1 comp.

Heads:
Dart Aluminum Pro 1, 200cc int, 64cc chambers, 2.02 int/1.60exh valves, int 264cfm @ .500" lift/28", exh 180cfm @ .600 lift/ 28" (mild ported) will handle up to 550 lift

Intake:
Holley Stealth Ram fuel injection system/ 950c ecu, 36lb injectors 1000cfm

Trans:
built 700r4 w/3000 edge racing torque converter

Rear:
12 bolt with 3.73 gears auburn unit 28" tire

this is all stuffed in a 4200lb truck
 
read thru this
viewtopic.php?f=52&t=82&p=105&hilit=+fool#p105

http://crower.com/misc/cam_spec/cam_fin ... &x=68&y=11

given the info, on compression,valve spring clearance,truck weight , rear gears etc, youve posted ID go this route in that truck, and install it split overlap/strait up not advanced or retarded
and yes before you ask, you could go with a larger cam like this

http://crower.com/misc/cam_spec/cam_fin ... 0&x=25&y=5

but I don,t think youll find it as fun to drive on the street even though it will produce better PEAK hp, its your choice but ID suggest you talk to CROWERS TECH GUYS before you decide, if you do very few trips in slow traffic the wilder cam will be fine, if you do occasionally tow stuff or sit in traffic ID consider the milder cam carefully
 
the milder durration cam matches your stated combos rpm and useful power band , concentrating its torque mostly where youll use it on the street,in the lower and mid end of the probable rpm range the larger cam extends the rpm band only slightly, but adds useful power, in the upper band.
id say your looking at about 370 peak rear wheel hp with the smaller cam and 400 plus with the larger cam, at the cost of less off idle torque and a slight loss of responciveness at very low rpms.
now Im sure those numbers look low but they are not, youll run decent times and outrun most street cars with those numbers, keep in mind its a 4200 lb truck, not a race car, if you want fast, get a vega or 240 Z body that weights 1200-1500lbs less
and youll see amazing performance from the same engine, if your expecting blistering performance, the supercharger will help, but your NEVER going to be really fast with a 4200lb truck, drop 1500 lbs and you will get someplace, as always talk to the tech guys at crower.
 
the crower 00468 looks like a good compromise, the crower 00469 is very similar to the crane 119661 I currently have in my 383 and Id doubt it will be ideal in your truck for a daily driver althou it will produce good hp, like the 00470 its made for producing more peak hp than low rpm torque.
youve got to decide on your goal here, the CROWER 00470,

http://crower.com/misc/cam_spec/cam_fin ... 0&x=25&y=5
and 00469

http://www.crower.com/misc/cam_spec/cam ... &x=59&y=21
both will really wake up the power curve but they will also kill off a bit of low rpm street manors

IF its only a weekend toy go with one of the wilder cams, because they will make more hp, if its daily transportation go with one of the milder cams, because they will be far nicer to drive under all conditions
the
crower 00403
http://crower.com/misc/cam_spec/cam_fin ... &x=68&y=11

and the crower
00468
http://www.crower.com/misc/cam_spec/cam ... &x=59&y=21

seem like the better choices to me in that truck
keep in mind the wider LSA will play nicer with the EFI sensors than the 110 LSA, ALL of the cams will be a noticable boost over the current cam your running, if you don,t mind loosing some low rpm driveability go with the wilder longer duration cams selected, if you want to keep things more street freindly go with the milder cams listed, its not like MARRIAGE/DIVORCE, your cam selection unlike a wife can be swapped out at reasonably low cost in a weekend, if you go to wild you can drop back, if its not enought you can upgrade.
btw you do realize both the wilder cams are at or slightly exceed the .550 lift limit on your springs so clearances ar very tight and will need to be checked carefully
 
grumpyvette said:
keep in mind the wider LSA will play nicer with the EFI sensors than the 110 LSA,
Click to expand...

Dave at crower mentioned to me he could do a cutom grind of any of the cams making them have a 112 LSA does that change your mind any?

This is not my daily driver but If I wanted to drive it every day I'd like to have that option, when you say "if you don,t mind loosing some low rpm driveability" do you mean it would be less then what I have now?
 
If it was my truck and it was used as a daily driver my pick would be the crower 00403,
I have no idea why daves pushing the 00468 over the 00403, other than it should build torque just a bit faster N/A and not work as well on nitrous
lets look at the specs

crower 00403
http://crower.com/misc/cam_spec/cam_fin ... &x=68&y=11


INTAKE Opens: 3.0 BTDC
Closes: 43.0 ABDC
EXHAUST Opens: 56.0 BBDC
Closes: 0.0 ATDC

LOBE SEPERATION 114º


Duration at .050" Intake: 226
Exhaust: 236
LOBE LIFT Intake: .346
Exhaust: .360

and the crower
00468
http://www.crower.com/misc/cam_spec/cam ... &x=59&y=21


INTAKE Opens: 7.0 BTDC
Closes: 39.0 ABDC
EXHAUST Opens: 50.0 BBDC
Closes: 2.0 ATDC

LOBE SEPERATION 110º


Duration at .050" Intake: 225
Exhaust: 232
LOBE LIFT Intake: .357
Exhaust: .367


the 00403 should run smoother and work better on nitrous and with a supercharger, with its wider LSA and increased exhaust durration,but either cam will work in your current application
the only real difference is the 00468 should produce slightly better power off nitrous, slightly better torque in the mid rpms,honestly the difference between them is small enought youll probable be within 20hp either way, the 00468 better N/a the 00403 better ON NITROUS or SUPERCHARGED with the addvantage of a smoother idle N/A
your not going to screw it up, going either route
 
You must log in or register to reply here.
Back
Top