Something I read, Is it true?

Old 06-12-2008, 06:35 PM
  #1  
gullion454
Member
MASTER JOURNEYMAN
Thread Starter
 
Join Date: May 2003
Posts: 35
Default Something I read, Is it true?

I was reading a magazine, a few months ago, in which they have a performace Q & A section and I came across something that I wasn't too sure about. A reader wrote in looking for advice on picking a camshaft and gave some specs on his motor. Here they are:

388ci small block chevy with a 3.75" stroke, 6" H-beam rods,and forged 10:1 Keith Black pistons, topped off with heads wtih 200 cc runners and 0.570" max lift, a shaft rocker system with 1.6:1 intake and 1.5:1 exhaust rockers and a Edelbrock RPM Air Gap intake.

The editor replied with suggesting a Crane Powermax cam (F-280-2), duration: 252/260 degrees at 0.050" lift, 0.536/0.554 inch max lift. He also suggested to switch to a single plane intake. Now here is the part that I am not sure I believe. He said, "Your 388 should easily make 580-plus horsepower..."

Now I don't know much but from all the stuff I have seen 580 hp seem a bit high. Please let me know what you guys think.
gullion454 is offline  
Old 06-12-2008, 10:04 PM
  #2  
OneBadGMC
Senior Member
RACING JUNKIE
 
Join Date: Sep 2007
Location: Belleville, IL
Posts: 658
Default

Sounds awfully overly optimistic considering the cam, heads, and compression.

Maybe a typo? Could he have meant 480 HP?

Even 480 HP seems a bit high to me...
OneBadGMC is offline  
Old 06-13-2008, 05:05 AM
  #3  
SST4530
Senior Member
DYNO TECH
 
Join Date: Feb 2004
Location: Leonard, Texas
Posts: 414
Default

I think somewhere around the 500 mark is realistic with that combo. 580 might be stretching it a bit.
SST4530 is offline  
Old 06-13-2008, 06:08 AM
  #4  
john858
Senior Member
EXPERT BUILDER
 
Join Date: Jan 2007
Location: atwood,Ky
Posts: 302
Default

500 would be tops with that combo, i had a 388 with a 670 roller alot big & better head,intake,13.5to1 on allky and made about 650hp so ya i would say typo.
john858 is offline  
Old 06-13-2008, 04:04 PM
  #5  
suicidebomb
Senior Member
RACING JUNKIE
 
Join Date: Jul 2007
Location: Independence, Missouri
Posts: 1,181
Default

I agree with you guys, I've got a 406, about 13-1 on alchy, single pattern flat tappet cam .525 lift, 250 dur. at .050 lift. I doubt that its making 450 hp. at the flywheel. And yeah, I know that aint enough cam.
suicidebomb is offline  
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -