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Username Post: Chevy 350 Cam Advice        (Topic#356589)
75velle 
Poster
Posts: 1

Reg: 05-21-19
05-29-19 05:21 PM - Post#2767293    

Hey all. I have a 75 Chevelle with a stock GM 350 crate truck motor in with about 1k miles on it. I want to install a new cam in the motor but not sure what size to go with . Its primarly a street car so I dont want to go too big. Id like to go with the stock converter and springs if possible. My friend recommended a 410 ext lift but that seems too small. Whats the max I can go before I have to start changing springs and converter. Thanks!



Edited by 75velle on 05-29-19 05:31 PM. Reason for edit: No reason given.

 


scrambldcj8 
Silver Supporting Member
Posts: 2478
scrambldcj8
Loc: Belchertown, MA
Reg: 04-06-03
05-30-19 04:38 AM - Post#2767309    
    In response to 75velle

  • 75velle Said:
stock GM 350 crate truck motor




Specs on said motor? Gm makes a lot of GM 350 crate truck motors...…

Part# link to said crate truck motor you're using?

Otherwise, any suggestion will be a crap shoot....



 
grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17348
grumpyvette
Age: 71
Loc: FLORIDA USA
Reg: 03-16-01
05-30-19 05:51 PM - Post#2767366    
    In response to scrambldcj8

https://www.summitracing.com/parts/crn-114132

as a rather well document boost in performance
usually at least 20 hp,
on most rather stock basic sbc engines, even stock automatic transmissions and stock converter stall speeds,
and one that works with power brakes and rarely causes any issues,
this crane cam is one Ive used frequently in many basically stock engines.
now obviously you need to install it correctly and carefully check clearances in the valve train, piston to valve clearance, etc.

why not call crane tech dept, and ask their advice? ask questions.

I would NOT consider anything much larger, in lift or duration.
crane (386)310-4875


IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


Edited by grumpyvette on 05-30-19 06:06 PM. Reason for edit: No reason given.

 
scrambldcj8 
Silver Supporting Member
Posts: 2478
scrambldcj8
Loc: Belchertown, MA
Reg: 04-06-03
05-31-19 04:42 AM - Post#2767397    
    In response to grumpyvette

^^^

Unless the OP has a GM 350 crate truck engine with a roller cam...….



 
grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17348
grumpyvette
Age: 71
Loc: FLORIDA USA
Reg: 03-16-01
05-31-19 05:12 AM - Post#2767399    
    In response to scrambldcj8

yes very true,
but you would normally assume he would have specified he has a roller cam presently, in the initial request for info.

quote
"I have a 75 Chevelle with a stock GM 350 crate truck motor in with about 1k miles on it"

IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


Edited by grumpyvette on 05-31-19 05:40 AM. Reason for edit: No reason given.

 
scrambldcj8 
Silver Supporting Member
Posts: 2478
scrambldcj8
Loc: Belchertown, MA
Reg: 04-06-03
05-31-19 08:03 AM - Post#2767407    
    In response to grumpyvette

Agreed! LOL

Assumptions can be slippery slopes.....GM offers about a 1/2 dozen "crate truck" combos in various stages (flat tappet...roller...Vortec….TBI/Swirlport heads..etc). It would be most helpful to know what the OP is actually working with.

….waiting patiently for the OP's return...LOL

I agree with you...most likely a standard flat tap cam.





 


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