vortec/cam question...again.

[92 Ty 1173]

Does anyone know a link to any threads that discuss the basics of doing the vortec swap. As in what I need, maybe a drill diagram for the new holes etc. Also how about some stock engine specs. Are these motors orginally roller cam and are the 422/412 cams roller cams? Can the stock vortec valvetrain be used, ie pushrods, rockers, studs? I know these have been adressed before but with the knowledge of everyone on here the answer comes so much easier this way. A search would probably take half the night, besides it gives us something to talk about. Thanks in advance for any help.

 

[TYTILIDIE]

Re: vortec/cam question...again.

Well, Ive never doen a Vortec swap but I can imagine you dont just drill the holes or what have you. Unless you know what you are doing that dept. ild hzve to advise you to take it to a mchine shop to get it done right. Some vendors on here sell the intakes ready to run. I think Mike at RPM does. I could be wrong. Our motors do come with roller cams. 422/412 are rollersw. Not sure about pushrods but am pretty sure the whole valve train is usable.

 

[dgoodhue]

Re: vortec/cam question...again.

Also how about some stock engine specs. Are these motors orginally roller cam and are the 422/412 cams roller cams? Can the stock vortec valvetrain be used, ie pushrods, rockers, studs?

88 up is roller cams, The 412/415/422 are roller cams, the stock vortec valvetrain can not be used use with the 412 cams. In general I have noticed most original SBC run of the mill valve springs are good to about .460 lift before the springs coil bind. I am pretty sure the stock 4.3 head (LB4) and the Vortec (L31) are very similiar.

 

[92 Ty 1173]

Re: vortec/cam question...again.

Ok thanks. I know with an extensive search I can probably find all my answers. Someday when I have a few hours I may tackle it, or just call RPM. Thanks again.

 

[AXXE]

Re: vortec/cam question...again.

Are you looking to put vortec heads on with the SyTy intake? If so, ask Mike Renz. He handled a GP a few years back for a machine shop that did the heads and intakes. They were located somewhere in PA. If you are looking to swap in a vortec motor, the compression is too high for a turbo motor. I don't think it would work well.

 

[93ty475]

Re: vortec/cam question...again.

Renz's site was a big help when I did mine....If you decide to get your own machine shop to drill the heads, buy some felpro 1203 intake gaskets to use as a template to guide them as to where to where the holes go.....

www.michaelrenz.com/typhoon/vortecs/

 

[MikeRenz]

Re: vortec/cam question...again.

i can still get intakes welded if anyone needs. I think turbotime may be doing it slightly cheaper than I can get it done though.

 

[#2875]

Re: vortec/cam question...again.

i can weld your intake and drill the heads. it will take me about a week though. i am about 3 hours south of you. i can probably give you a turn key set of heads (springs, valves, and such) if you don't already have them. just pm me if you are interested.

 

[92 Ty 1173]

Re: vortec/cam question...again.

Yeah I'm looking at the vortec heads. I checked race proven for his intake. Now I just have to weigh out my options. What is the main difference between the L-35's and the vortecs?

 

[MRKING]

Re: vortec/cam question...again.

combustion chamber design and they are less prone to knock/detonation . They also flow better in stock vs. stock form .