Vortec Roller Block 383 Build? - Page 2 - Chevelle Tech
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post #16 of 33 (permalink) Old Mar 17th, 16, 9:56 PM
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Re: Vortec Roller Block 383 Build?

I have not run any of the over the counter or Mex. heads in any of my builds, just used what came on the motor after magging the heads for cracks. Lots of the guys want to go to after market heads big roller cams and a lot of other things that cost a lot of money. If you have it spend it. If you want a cheap build that works then the eagle kit has the after market rods for the floating pins. My choice of cams would be the comp XR270HR works great in my 81 olds. 12.50 et at 109mph. on good air. 342 gear with a 26in DR. If you have questions then PM me.
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post #17 of 33 (permalink) Old Mar 18th, 16, 1:35 AM
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Re: Vortec Roller Block 383 Build?

new updates on a 4year old thread
good to see others working on the same engine combos...

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post #18 of 33 (permalink) Old Mar 18th, 16, 9:44 PM
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Re: Vortec Roller Block 383 Build?

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Originally Posted by VinceS427bb View Post
new updates on a 4year old thread
good to see others working on the same engine combos...

Wow! I didn't notice that until I read your post.
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post #19 of 33 (permalink) Old Nov 3rd, 16, 2:19 PM
 
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Hey guys I have a 880 castings 350 block bored 30 over, I want to go forged internals, with a dished piston that is about -24cc because I wanted to put a blower on it. Not really trying to go over the top on HP I believe I would be happy with about 550hp.
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post #20 of 33 (permalink) Old Nov 3rd, 16, 2:22 PM
 
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I guess my question is what brand of internals are great and where could I purchase for a good deal?
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post #21 of 33 (permalink) Old Nov 3rd, 16, 3:32 PM
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Re: Vortec Roller Block 383 Build?

Scat is a reputable aftermarket manufacturer of rotating assembly components.

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post #22 of 33 (permalink) Old Nov 3rd, 16, 4:37 PM
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Re: Vortec Roller Block 383 Build?

I'm in the early stages of putting together a similar build. I was planning on starting off with the ATK 383 short block and utilizing an existing set of iron Vortecs I have on my 350. The Vortecs have had the valve guides machined to allow up to a .530 lift and the rocker studs pinned.

I've read a lot on the cam choices but still not clear on what's best for my build, but want to take advantage of the OEM roller setup this block supports. Currently have a TH350 with a 2.73 posi which I plan to keep for now. So looking for a cam that will give me good overall performance but with good low-end torque to overcome current 2.73 gearing. This is strictly a street cruiser - don't plan to race at the track. Also considering an RPM air gap and carb in the 625-650 CFM range (currently have an Eddy 1406 - 600 CFM).

Suggestions? Am I on the right track with what I've described so far?

Thanks -

jim
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post #23 of 33 (permalink) Old Nov 3rd, 16, 5:19 PM
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Jake
 
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Re: Vortec Roller Block 383 Build?

Quote:
Originally Posted by Jim's69Ragtop View Post
I'm in the early stages of putting together a similar build. I was planning on starting off with the ATK 383 short block and utilizing an existing set of iron Vortecs I have on my 350. The Vortecs have had the valve guides machined to allow up to a .530 lift and the rocker studs pinned.

I've read a lot on the cam choices but still not clear on what's best for my build, but want to take advantage of the OEM roller setup this block supports. Currently have a TH350 with a 2.73 posi which I plan to keep for now. So looking for a cam that will give me good overall performance but with good low-end torque to overcome current 2.73 gearing. This is strictly a street cruiser - don't plan to race at the track. Also considering an RPM air gap and carb in the 625-650 CFM range (currently have an Eddy 1406 - 600 CFM).

Suggestions? Am I on the right track with what I've described so far?

Thanks -

jim
The Performer RPM is all you'll need. Very marginal difference between the RPM and a RPM airgap in this type of buildup. Stay small with your cam selection. First roller cams think they're bigger than they are when compared to an old school flat tappet cam. Second, shorter duration will help keep the power coming in at lower engine speeds. What type of fuel are you planning to run through this thing?
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post #24 of 33 (permalink) Old Nov 3rd, 16, 6:43 PM
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Re: Vortec Roller Block 383 Build?

Hi Jake -

Thanks for the response. Per ATK's site, with 64cc chambers, I would be at 9.8/1. I'm hoping this won't be too much for running premium which in our area is 91 octane.

jim
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post #25 of 33 (permalink) Old Nov 3rd, 16, 9:39 PM
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Re: Vortec Roller Block 383 Build?

9.8 will work, I run 91 oct. at that, but I have alum. heads.

Jim

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post #26 of 33 (permalink) Old Nov 4th, 16, 1:01 PM
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Jim
 
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Re: Vortec Roller Block 383 Build?

How much of a difference between the old Performer 2116 (Vortec version of the 2101) and the RPM. I'm currently running the 2116 - will it be a noticeable improvement to go with the RPM for my 383 build?

Thanks -

jim
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post #27 of 33 (permalink) Old Nov 4th, 16, 1:52 PM
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Jake
 
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Re: Vortec Roller Block 383 Build?

Yes, I think so. I had a 2101 on my 350 and noticed a big difference swapping to the RPM, so I'd say there will be a more noticeable difference on a bigger engine.

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post #28 of 33 (permalink) Old Nov 4th, 16, 4:22 PM
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Re: Vortec Roller Block 383 Build?

Quote:
Originally Posted by VORTECPRO View Post
"If those are the mexican casting good luck trying to make power"


Those things have a lot of problems, I wouldn't consider using those either.
What kind of problems? My out-of-the-box Mexican 062s looked OK (227 cfm @ 0.450" if I recall). Seems in-line with the often quoted figures for "US" 062/906 heads.

EDIT: Vortecpro - you talking about the Darts?
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post #29 of 33 (permalink) Old Nov 4th, 16, 4:27 PM
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Re: Vortec Roller Block 383 Build?

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Originally Posted by novadude View Post
What kind of problems? My out-of-the-box Mexican 062s looked OK (227 cfm @ 0.050) if I recall.
The Mexican castings are not a 170 runner like GM advertises. I really doubt those heads are flowing 227 CFM at .050 lift ( 50 thousands lift ) Not even at .500 lift they will not flow that much.

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post #30 of 33 (permalink) Old Nov 4th, 16, 4:28 PM
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Re: Vortec Roller Block 383 Build?

Quote:
Originally Posted by Jim's69Ragtop View Post
I'm in the early stages of putting together a similar build. I was planning on starting off with the ATK 383 short block and utilizing an existing set of iron Vortecs I have on my 350. The Vortecs have had the valve guides machined to allow up to a .530 lift and the rocker studs pinned.

I've read a lot on the cam choices but still not clear on what's best for my build, but want to take advantage of the OEM roller setup this block supports. Currently have a TH350 with a 2.73 posi which I plan to keep for now. So looking for a cam that will give me good overall performance but with good low-end torque to overcome current 2.73 gearing. This is strictly a street cruiser - don't plan to race at the track. Also considering an RPM air gap and carb in the 625-650 CFM range (currently have an Eddy 1406 - 600 CFM).

Suggestions? Am I on the right track with what I've described so far?

Thanks -

jim
Howards 270/278, 217/225, .495/.500, 108 LSA roller would be a good choice. I have this cam in a Vortec head 355, and it has good low-end performance. Should have even better low-end performance in the longer stroke engine. Probably be all done at 52-5500 rpm, but you don't need more than that wit a tall 2.73 gear anyway.
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