85IrocNOH

my car needs a new cam and lifters. i wanna go bigger but nothing too radical. i was thinking about getting a crane compucam 2030 kit. Specifications:
* Advertised duration: 264 intake/274 exhaust
* Duration at .050 in.: 204 intake/214 exhaust
* Gross Valve Lift: .423 in. intake/.446 in. exhaust
* Lobe separation: 110 degrees
* RPM range: 1,500 to 4,500

Would this be a good cam to put in my car? I did the 730 SD conversion but other than that everything is stock. Should i go bigger? the prom can be modified if necessary. what are the stock cam specs for the 85 305 tpi engines?

Vader

85 TPI cam specs can be found in the Tech Articles on this site.

jfreeman74

Good luck.. I have been trying to find the best cam for my '85 305TPI for a while now. Unfortunately I haven't had much luck on this site. That cam does seem really mild compared to some of the cams that have been recommended by CompCams. Whatever cam you decide on I don't think you will get a big gain in performance without changing the heads. I will be getting the Torquer 305 heads. I don't have the money for aluminum heads right now. Here are the cams that I have be looking at:

XE249-12 206/212 .434/.444 112 LSA Seems too mild to me.
XE256-14 212/218 .449/.456 112 LSA
XE262-14 218/224 .479/.480 114 LSA

I may be mistaking but isn't the 2030 a hydralic roller cam? The '85 305 is a hydralic flat tappet cam. All of the above cams are hydralic flat tappet cams.

85IrocNOH

i checked the tech articles and only saw one article that pertained to cam specs. it had nothing to do with 305's or 85 tpi vehicles. which article is it?

i am only replacing it because it is all ****ered up so i don't really want anything really radical. if this motor ever blows up it won't get rebuilt. will be a good excuse for a 350. how well will it idle with a 110 degre LSA? will it be lopey? should i go bigger? if so, what do u recommend? anybody with a 305 that they went with a bigger cam with pretty good results? I'm not set on any specific brand or anything like that. I figured i might as well just go aftermarket rather than order an OEM cam and lifters from GM.

jfreeman, as far as i can see on summit's site, it's not a roller cam. their site could be wrong tho but i know i cannot get a roller cam.

jfreeman74

I believe this is what Vader is referring to. https://www.thirdgen.org/newdesign/tech/techdb.shtml

Anyway, the specs for the cam in the 305TPI are:

202/206 .403/.415 114.5 LSA

So as you can see, there isn't that big of a difference between the 2 cams. The 110 LSA is a little too low for an automatic. I wouldn't go below 112 LSA, unless you like the lope. I personally do not.