Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Sponsored by:
Sponsored by: CARiD

will this cam be to big for my 305

Thread Tools
 
Search this Thread
 
Old Apr 24, 2004 | 09:56 AM
  #1  
white91formula's Avatar
Thread Starter
Senior Member
iTrader: (4)
 
Joined: Sep 2003
Posts: 908
Likes: 0
From: w. boylston mass
Car: 91 formula
Engine: 305
Transmission: t5
will this cam be to big for my 305

Originally posted by BADASS355CIZ28
hey guys i have a brand new solid roller cam for a sbc

260/258 duration .546 int .539 exh lift 109 lobe center

i will let this brand new cam go for $100.00 pm me or let me know if your interested. mongo
its $279 new, looked like a good deal, waht else am i going to need for my 305 to put this cam in ? lifters ?
Reply
Old Apr 24, 2004 | 10:20 AM
  #2  
Stekman's Avatar
TGO Supporter
 
Joined: Jul 2003
Posts: 4,803
Likes: 2
From: Grand Rapids, MI
Car: Z28
Engine: Sb2.2 406
Transmission: Jerico 4 speed
Axle/Gears: Ford 9" 3.60
It may or may not be. Is that duration seat to seat or at .050" of tappet lift? Makes a big difference. But since its a solid roller i would not be suprised if its at .050" tappet. in which cse, yes thats WAY too big for your 305. ANd in the case that that is duration at .050", it will be stalling at at LEAST 3200-3500, if not more.

Either way, if you DO run it, which if what i said above is true, and it will be going against all that is logical, you will need new lifters. ones that look like these:

Those are solid roller lifters made by Isky.

The other big thing is you will need new springs and reatainers to fit them. Such as these:
Those are the Isky 9915 springs with matching Super 7 degree retainers. And no, you cannot be cheap and re use your old springs. The ramp rates of the solid roller are designed to be the most aggressive of any camshaft type. That aggressiveness will simply over-tax any spring that isnt up to par.

I would then recommend some high strength pushrods to withstand the force as well as all the other goodies. A solid roller valve train is probably the most expensive setup that you could run. For example, i ran a hydraulic roller for a while, then made the change to a solid roller. Despite all the parts that i had for the hydra roller, i still ended up getting a whole new valve train consisting of:
  • Isky Camshaft
  • Isky Lifters
  • Hatfield Racing pushrods
  • Isky rev kit
  • Comp pro magnum rocker arms
  • Isky 9915 springs
  • Isky Retainers and locks to match the springs
  • Cloyes billet timing set
  • Comp polymer distributor gear
  • and a bunch of little odds and ends
So pretty much this:


It wasnt a cheap setup. It costed more than a hydraulic roller setup. So, i guess, the moral of my story is this: Is the duration you listed at seat to seat? Or .050" of tappet lift? But since im assuming it is .050", it will be way to big for youre 305. Well it isnt way to big, it just wont have any streetability whatsoever considering as how its a top end cam designed to most LIKELY operate under circle track conditions

Last edited by Stekman; Apr 24, 2004 at 10:22 AM.
Reply
Old Apr 24, 2004 | 10:47 AM
  #3  
white91formula's Avatar
Thread Starter
Senior Member
iTrader: (4)
 
Joined: Sep 2003
Posts: 908
Likes: 0
From: w. boylston mass
Car: 91 formula
Engine: 305
Transmission: t5
ok then, guess i wont be getting that cam...
Reply
Old Apr 24, 2004 | 08:37 PM
  #4  
ME Leigh's Avatar
Supreme Member
20 Year Member
 
Joined: Jan 2002
Posts: 3,852
Likes: 1
From: Valley of the Sun
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
Thats a huge cam, that would be close to un-drivable on the street.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Jake_92RS
Tech / General Engine
8
Jan 28, 2020 10:37 PM
Orr89RocZ
Power Adders
206
Apr 25, 2016 08:28 AM
beastin91rs
Tech / General Engine
18
Oct 9, 2015 07:38 AM
st.evel07
Engine Swap
5
Aug 13, 2015 06:15 PM




All times are GMT -5. The time now is 07:49 AM.