E-mailed Lazer and asked what practical BMEP number to use with medium grade gas on a motor build and to apply that number to a dyno program. Lazer answered "programs only approxmate, Lazer work with mechanical compression since 99% of people understand mechanical not dynamic. 9.2 cr or less maximum for iron heads". Asked again, Lazer answered "Getting into numbers is beyond service offered free but $200/hr or $50/quarter hr". Asked the third time for a BMEP number, Lazer answered "It's time to switch to phone if this is going to continue". With this type of response to a single question without a answer after asking three times for a BMEP number, they are not worth your hard earned dollars. There must be other cam grinders willing to answer a simple question and work with you that want your business.
Bad experience with Lazer Cams.

Carl....=o&o>....

 

Thats crap! Theres technical service or assistance for a reason. If they don't want to help you then why help there pockets. Thanks for the post! I checked out their cams when looking for my cleveland but they sucked imo.

 

9.2? That's dumb. I'm running 10:1 in my 390 on 89 octane with iron heads and it works just fine.

Sounds like this is the company to avoid.

 

I am going to be above 12 to 1 on iron heads!! CAll deltacam they are really good help.

 

Rusty I agree 9.2 CR will make a (half dead) dog or a motor, Polcat thanks for another company (Delta Cam) to look into. On my old 410 (232,000 miles) with Dyno Sims ("dyno numbers are only approximate numbers Lazer stated") was 184 psi. Only after getting off the highway exit and jumping on it (high block and head temps) would i get a small trace amount of detonation. With the new "must have 482 motor" the cr will be 9.5 to 9.6 to one and the BMEP numbers with a cam i designed will have a max BMEP of 187.2 psi. After carbon builds up I would believe the cr would rise again by .25 point above the designed cr. I run them hard so carbon build up is not a problem or minimal. Is there a great difference in amount of detonation going from 184 to 187.2 psi BMEP?
Thanks again.

Carl....=o&o>....

 

Why not go with the often recommended Crane cams? They seem to make the most power in Desktop Dyno. I've got nothing against looking for a better cam, but in every single dyno simulation I've run, Crane cams have made more power than any other comparable cam from any other manufacturer.

 

Rusty:
I wanted to try different cam companies to get a base line maximum practical BMEP number for a medium grade gas engine. I wanted to compare numbers from different cam grinders. Yes I know Crane is the cam of choice and one I would use if I don't get a custom grind. The cam I came up with for a 482" (4.25 x 4.25) 9.50 cr, MR head motor is intake duration 266, exhaust duration 284, lift .530 both valves, IVO 26, IVC 60, EVO 76, EVC 28, ICA 107, ECA 114, lobe centerline angle 110.5, valve overlap 54. This with F427 or Sidewinder intake with 670 or 770 carb, headers to 2 1/2" X cross w/Spintechs. I started with a Crane specs and ran different numbers. What do you think? Your HP and Tq numbers? Thanks.

Carl....=o&o>....

 

Were we talking solid, hydraulic, or roller cam? The following assumes regular hydraulic, non-roller.

If you're looking for a stump puller motor, this would be it. 393hp @ 4500rpm, 527ft-lbs @ 2500rpm. With a Crane 941 cam you give up a little torque for horsepower. 397hp @ 4500rpm, 512ft-lbs @ 2500rpm. IMO the difference isn't worth spending the extra $$$ on a custom cam.

 

Sounds like a good company to stay away from.

 

Rusty:
That would be a hydraulic cam with a lifter acceleration rate of 3.10. I must be lost, stupid or both as the Dyno Sim program with MR heads 2.19 & 1.73 valves 9.50 cr the print out is 600# tq @ 2,000 , 425 hp @ 4,500, max BMEP of 187.6 @ 2,000. What the heck am I doing wrong? I do like the numbers I come up with. My numbers are 8% higher in hp and almost 14% higher in tq.
The wife always said I needed help.

Carl....=o&o>....

 

Did you put in actual flow numbers for those heads? It could be that we have different flow numbers. Also, the different programs calculate things differently. I am glad to hear that Desktop Dyno 2000's results aren't as overblown as everyone says they are.

 

Well that's great guys! I just got my cam, springs, retainers, and locks from Lazer yesterday. Maybe I will send them back but I guess you could say that my experience with them so far has been good. Maybe I will send the stuff back.

 

Annihilator, I just got my cam today from delta cams, as far as cost I paid $145 for cam and lifters. this is for a solid lifter cam. I plan on Drag racing my truck so i don't need much street, but I am building a 390 stoker (418). 390/428 crank 12.5 to 1 compression. On my DD2k I am getting 556hp@6500 and 522@5000. Mayhem Bob sent me to Delta cams cause he was running a custom grind delta cam in his previous engine which was a 422 and was in the low 12's with a Ford F100 Stepside, I am runnig the same style truck and different cam than him. this cam I am had ground has a few more hp and torque on my setup. Oh I got my cam with in a week too. If you need any help just e-mail me.

 

Well guys I think it all boils down too trying to get every last bit of HP and TQ out of your build, Is when you go to a custom cam ground just for your build..

And of course the more HP you start with the more HP a custom grind will give you...As for my Build..spending $300 just for the Custom Cam was worth 35 more HP..

Than the off the Shelf CompCams Street/Strip Roller.....

Just my .02 cents....

Russ

 

I found in my notes..the Lazer Cam that Ratsmoker wanted to run in his 390 build....

Grind # FF-R297A-305E-10 Solid Roller 266*-272* @.050 .711"/.702" Lift

Lobe Sep..-110 set-up 106* on intake...

Russ