Home | Register | Login | Contact Us

 
Auto Math
Classifieds
Forum
Gallery
Games
Garage
Tech Articles
Utilites
 
FAQFAQ    SearchSearch    RegisterRegister    Log inLog in    Log in to check your private messagesLog in to check your private messages    Forum Subscriptions1/4 Mile Table 

I need some help with my small block rebuild please!!!

 
Post new topic   Reply to topic    SMOKEmUP.com Forum Index -> Chevy - Small Block Gen 1
View previous topic :: View next topic  
Author Message
jake
Newbie


Joined: 28 Sep 2010
Posts: 3

210.34 points



PostPosted: Tue Sep 28, 2010 4:38 am    Post subject: I need some help with my small block rebuild please!!! Reply with quote

I started this project as a simple rebuild for my 89 chevy 4x4 and it has since went haywire. I've rebuilt several engines back to stock specs but this went from stock to mis matched parts, I started with an 1989 2bolt 350 with standard heads but now I have an 86-94 4bolt 350 block bored 40 over and a set of 906 vortec roller heads (that I bought for $50 ready to bolt on) since my old stock heads were both cracked in the exhaust ports. My problem is that I want to build it for towing and still be able to run my stock TBI or at least close to stock. My pistons are not performance pistons just 40 over badger replacements that I had left over from a previous build. I am wanting to run a roller cam to match the heads but can't seem to find one in the rpm range for my application at a reasonable price, any suggestions for where to go from here?
Back to top
View user's profile Send private message
clay
Moderator


Joined: 24 Nov 2002
Posts: 3209
Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Tue Sep 28, 2010 10:52 am    Post subject: Reply with quote

One option is to run the stock cam from a Vortec engine. I have done a stock Vortec with headers and a Performer intake with a 600 Edelbrock carb and it was a pretty torquey package. You could add 1.6 rockers as a cheap item that would help. You are limited on lift with the Vortec heads so a lot of the hydraulic rollers with any sort of duration will exceed the lift limit of the heads (about 0.475"). Elgin makes a hydraulic roller that would work. They have 2 actually. 1st has 202* - 212* at 0.050 with 0.437 / 0.462 lift on a 112* seperation - rpm range idle to 4600. Part # is E1040 from Competition Products. Price is $199. Other choice is 210* - 215* at 0.050 with 0.462 / 0.470 lift on a 110 seperation - rpm range is 1500 - 5200. Part # is E1136. Price is $182. If you run either of these you would have to stick with the factory rocker ratio to not get into too much lift. You could actually check your particular heads to see exactly how much lift they could handle - the 0.475" is just the generally accepted rule. Clay
_________________
I have done so much with so little for so long, I can now do anything with nothing.
Back to top
View user's profile Send private message
jake
Newbie


Joined: 28 Sep 2010
Posts: 3

210.34 points



PostPosted: Tue Sep 28, 2010 12:58 pm    Post subject: Reply with quote

Thanks for the suggestions, I'll have my guy at the machine shop check the lift of my heads and I'll let you know what I find out. The only thing I know about the heads are they came off of a goodwrench performance motor and are drilled for the vortec intake and for carb intakes, I'm going to have to do some work to my TBI intake so I can bolt it on. I don't know what the rocker ratio is for the rockers that came with the heads I just know they are self aligning. They also have the single angle valves with hardened vale seats.
Back to top
View user's profile Send private message
Agoetz2005
Newbie


Joined: 21 Aug 2010
Posts: 9
Location: Spring Hill, TN
302.94 points



PostPosted: Wed Oct 13, 2010 3:11 pm    Post subject: Reply with quote

I have heard going with 787 retainers, and LS6 Valve Springs can get you up in the .500 lift range with the vortecs without any work.
Back to top
View user's profile Send private message
jake
Newbie


Joined: 28 Sep 2010
Posts: 3

210.34 points



PostPosted: Wed Oct 13, 2010 3:51 pm    Post subject: Reply with quote

I'm still not sure exactly what springs I have but my guy at the machine shop said that they will handle up to a .600 lift before binding, they are deffinetly not stock springs.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    SMOKEmUP.com Forum Index -> Chevy - Small Block Gen 1 All times are GMT - 5 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
Home | Contact Us | Automath | Cam Files | Dyno Search | Forum | Garage | Picture Gallery | Reaction Timer

Copyright 1997-2016 SMOKEmUP.com All rights reserved.
Advertising Info     Disclaimer     Privacy Policy