www.the351cforum.com

Running a hyd roller cam in my 4V CC stuffed port iron headed 408 10.7 CR
Cam is .624/.607 236/240 @ .050
110 CL ..I installed the Ford Motorsport (Crane) Link Bar hyd lifters .. finally have it somewhat figured out ....11.3 @ 118 this past weekend ....Im shifting at 5200 going thru the traps at 6K ....prepped C-4 4:30 locker ....Sooo the car is working very well and very consistent ...but only 6K RPM ?
https://youtu.be/yP1_hG1-xnw
Its in a gutted 67 Cougar that weighs 2800 lbs ......help ?

That's not a lot of duration for a 408 with factory heads. I wouldn't expect it to pull much higher at all. In addition, the duration split is not correct for a factory head, and depending on the advertised durations, the rest of the specs could be counterproductive as well.

_________________
Brent Lykins, Lykins Motorsports
www.lykinsmotorsports.com
brent@lykinsmotorsports.com

The cam was specd by a builder named Keith Craft for a 408 Iron Headed engine goibg into a street driven Cobta Kit Car with a 5 speed. The stroker was previously owned by Dustin Rinne a member here. I have the details on the flow numbers of the heads and the short block. Brent I left a meaasge on your business phone...I would like to order a cam. The car is currently more competitive than the Stock Stroke ported 2V heads with F260 and 4:86 gears and 7200 RPM's thru the traps with almost identical ET's. I agree the combo should be much quicker/faster. I currently have 1.53 60 ft times and was trying to decide change the cam....or try 4:11 gears and see if that helps use the strokers low end grunt

I don't think I have a message from you. You can shoot me an email or try my phone again. brent@lykinsmotorsports.com or 502.759.1431

_________________
Brent Lykins, Lykins Motorsports
www.lykinsmotorsports.com
brent@lykinsmotorsports.com

Mercinary

Hello my fellow Cat friend. Curious, did you actually degree your cam when you put it in or just trust the dot to dot? 4.11 gears might be beneficial depending where your engine makes its Tq. I have 4.11 gears and have 27x11.5 QTP tires. What stall converter do you have/stall? So far with my gutted 70 Cougar my best time is 11.56@117 with a 1.65 60ft. My 1/8 mile on this run was .12 and 1mph slower than previous 1/8 mile times or it should have gone 11.3-11.4 My problem is converter, its a 3000 and still need to put in my 5000. This is how my TQ curve looks from engine dyno. See, a 57 ftlb tq differance from where i launch now and at 5k. A 70lb difference from 3000 to 5600rpm. The way I understand it is your car will react to gearing depending on where your engine makes its peek power/tq/ the curve and weight of car. Did you engine dyno or wheel dyno yours? I will put it to you this way, me going from a 26x10.5 to a 27x11.5 tire my 60ft dropped .100 my 1/8 dropped .200/gained 2mph and quarter dropped over.100 and gained 2mph. My buddy that built my converter said usually if your ET drops when you put a taller tire on then usually you are over geared. Granted if all variables are equal and no tire spin from either tire set. I had no spin from either.
TQ Hp
3000-377 215
4000-385 293
4500-399 342
4600-408 357
5000-434 413
5200-443 439
5400-451 463
5600-453 483
5700-452 491
5800-450 497
5900-448 503
6100-441 512
6300-434 521

I see this all the time on Cleveland engines with hydro rollers.
What springs and retainers are you using?