hey my friend was telling me about some company that has a smog legal speed density cam, i know some of you will say that you can/cant; run heads/cams in a sd. And some will say it's all in the tune, but have any of you heard of this?
You probably won't see much gains with that cam with stock H/I. That cam is like .469 intake and .499 exhaust (stock is .444 on both). If you want to add lift get some 1.7RR's which will add about .30 lift. The RR's might help out becuase it's a litte smoother than the standard rockers and alot easier to change. The stock heads are the biggest block of air flow on a 5.0.
These Performance Level 2 cams from Crower are designed for individuals who require more power and an extended rpm range. They provide excellent low-end and mid-range power for spirited street and off-road driving and mild marine applications. These cams work well with stock or near-stock engines and drivetrains.
Vendor Crower
Product Line Crower Performance Level 2 Camshafts
Cam Style Hydraulic roller tappet
Basic Operating RPM Range 2,200-5,500 RPM
Intake Duration 050 inch Lift 218
Exhaust Duration 050 inch Lift 224
Advertised Intake Duration 278
Advertised Exhaust Duration 282
Intake Valve Lift with Factory Rocker Arm Ratio 0.468
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.486
Lobe Separation (degrees) 114
Intake Valve Lash (in) 0.000
Exhaust Valve Lash (in) 0.000
Grind Number 218HR224
CARB EO Number (Not Specified)
Quantity Sold individually.
Notes (Not Specified)
The Crower 15510 cam is a littel milder and also a good SD cam. There are others that are proven SD cams too, like the Crane 2030, 2031; Comp Cams XE270 (the one with 114* lobe centers),etc.
Just stay at less than 220* duration @ .050" lift and keep lobe centers at 112-114*.
i have the crower 15511 cam with speed density and the mods in my sig. i have bone stock heads and i put down 244 horse and 291 torque at the wheels and the car runs awsome i am also doin afr 165 cc heads and 24# injectors this winter, i think this cam is smog legal too.
Any idea on how much lift the stock 5.0 87GT motor can take with Windsor Jr heads? I called Crane cams and they said basically the only cam that they have which will work on SD is the Powermax 2020.
Part Number: 444211 Grind Number: POWERMAX 2020 (FORMERLY COMPUCAM 2020)
Engine Identification:
Start Yr. End Yr. Make Cyl Description
1985 Up FORD-MERCURY 8 GOOD LOW TO MID-RANGE TORQUE AND HP, WORKS W/AUTO OR 4/5 SPD. MANUAL AND STOCK REAR END GEARS (50 STATE LEGAL 85-93, C.A.R.B. E.O. D-225-46) BASIC RPM 1500-5000
Engine Size Configuration
302 C.I. V
Valve Setting: Intake .000 Exhaust .000 HOT
Lift: Intake cam 3313 @Valve 530 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 3313 @Valve 530
Rocker Arm Ratio 1.60
Cam Timing: ---- @----
Lift: Opens Closes ADV Duration
Intake ---- ---- 262 °
Exhaust ---- ---- 270 °
Spring Requirements: Triple Dual Outer Inner
Part Number 99841
Loads Closed 120 LBS @ 1.940 or 1 15/16
Open 347 LBS @ 1.440
The only thing that sucks is I just bought 1.7RR's and he said I would probably have to much lift for the piston to valve clearance. The Jr's have 1.94 intake valves and .600 lift springs so the heads have no issues. And I know you should always check the piston to valve clearance anyways but just was wondering if I need to look for new rockers before I start the swap.
Cam phasing (installed ICL), lift and valve train install/geometry play a BIG part in the clearance for a given head, and as you said - there is only one way to tell - MEASURE IT.
You may have issues due to the 1.94/1.60(?) valves. For a most informative read on cam phasing and valve train geometry, spend some time at and print out the pages at: