Mild sbc 383 cam recomendation.

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rfoll
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Mild sbc 383 cam recomendation.

Post by rfoll » Thu Apr 12, 2018 9:26 pm

This is a fresh build, most of the major parts are already on hand. Flattop KB pistons and a pair of old but nice Brodix street heads.The heads are probably on a par with stock Vortec flow cfm . Recent measurement and calculations say static compression will be right on 9.5:1. The car has a nice exhaust with Hooker headers. Pretty good chance this will never see the track. The car is a 68 Camaro RS with a 3.73 rear gear. He is going to use an automatic this time, we will buy a converter to suit the combo. He is going to want it to have a nasty sounding idle, I want to make sure it won't beat itself to death on pump premium. This Crane cam, https://www.summitracing.com/parts/crn- ... /chevrolet, 218/218/106 intrigues me, or I am thinking about seeing what my local grinder can cook up. Maybe something similar to a Comp 262 or 268 on a 108 lsa. Thanks Rick.
So much to do, so little time...

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Re: Mild sbc 383 cam recomendation.

Post by F-BIRD'88 » Thu Apr 12, 2018 10:11 pm

Isky Cams #201274 274 MEGA Cam

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Re: Mild sbc 383 cam recomendation.

Post by 427dart » Thu Apr 12, 2018 10:57 pm

I used the Comp XE 274 Hyd. roller in my 351W with 9.0 compression with good heads and a 3.89 gear in my '85 Mustang LX with C4 auto.
Torque convertor was an 11 inch 2500 stall and it ran very well! Very streetable and ran easy 11.50 at 120.
I believe the duration was 224/232 on a 110 LCA.

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Re: Mild sbc 383 cam recomendation.

Post by steve316 » Fri Apr 13, 2018 8:19 am

^x2

rfoll
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Re: Mild sbc 383 cam recomendation.

Post by rfoll » Fri Apr 13, 2018 10:34 am

The Brodix street head flow pretty much stalls out by .500" lift. ttp://speedtalk.com/forum/viewtopic.php?f=1&t=42385&p=535429#p535429. The spring pockets are stock diameter. This is not going to be a race motor, but a street driven tire smoker. I was hoping to get a response from someone with experience using the Crane 270 H06.
So much to do, so little time...

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Re: Mild sbc 383 cam recomendation.

Post by rfoll » Fri Apr 13, 2018 10:40 am

The Brodix street head flow pretty much stalls out by .500" lift. http://speedtalk.com/forum/viewtopic.ph ... 29#p535429 The spring pockets are stock diameter. We have a split set of 1.6/1.5 roller rockers going on the heads. This is not going to be a race motor, but a street driven tire smoker. I was hoping to get a response from someone with experience using the Crane 270 H06, it kind of stands out for the small duration and 106 LSA.
So much to do, so little time...

user-17438

Re: Mild sbc 383 cam recomendation.

Post by user-17438 » Fri Apr 13, 2018 11:18 am

my idea of a mild street engine, would be a cam in the mid 230s@.050 or higher, anything lower would be considered a stock to me. i think of it that way because of the rpm range. Radical street engine or street strip would be starting at 260@.050.

sorry for you older gentleman but a 220s cam belongs in a tow truck.

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Re: Mild sbc 383 cam recomendation.

Post by F-BIRD'88 » Fri Apr 13, 2018 11:23 am

Another, very similar to the Isky is Comp Cams cs268AH-8
#12-319-4 222-226 .464 .464 108

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Re: Mild sbc 383 cam recomendation.

Post by RevTheory » Fri Apr 13, 2018 11:26 am

Have you given any consideration to either the Comp Thumper or Lunati Bootlegger with 1.6 rockers on the intakes?

http://www.compcams.com/Company/CC/cam- ... d=107&sb=2

http://www.lunatipower.com/Product.aspx?id=2929&gid=401

He wants a nasty exhaust note and it sounds like you're after a shelf grind...

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Re: Mild sbc 383 cam recomendation.

Post by F-BIRD'88 » Fri Apr 13, 2018 11:32 am

A fun and very responsive short duration street solid

Comp Cams cs270B-6 #12-607-5
235-242 .495-.507 106 .020, .022
use Isky 235D stock dia springs
cool idle great street power and torque right where
you want it.

user-30257

Re: Mild sbc 383 cam recomendation.

Post by user-30257 » Fri Apr 13, 2018 12:36 pm

F-BIRD'88 wrote:
Fri Apr 13, 2018 11:32 am
A fun and very responsive short duration street solid

Comp Cams cs270B-6 #12-607-5
235-242 .495-.507 106 .020, .022
use Isky 235D stock dia springs
cool idle great street power and torque right where
you want it.
Will that cam work without 4 2bbl carbs?

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Re: Mild sbc 383 cam recomendation.

Post by nxtruck » Fri Apr 13, 2018 12:43 pm

I had thought about using the Crane 270 h06 cam in a 355 I recently built for my 65' C-10 daily driver, but was concerned about it not making enough vacuum for the brake booster. It is a nice sounding cam for a daily driver-type of build, though. I ended up using an Elgin 1065 grind, which is similar to the older Comp 268he grind. Makes plenty of vacuum and has a little chop to it at an idle.
I'd say if the car in question has manual brakes, then the Crane cam would make a good choice for what you're wanting to do.

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Re: Mild sbc 383 cam recomendation.

Post by statsystems » Fri Apr 13, 2018 1:02 pm

rfoll wrote:
Fri Apr 13, 2018 10:40 am
The Brodix street head flow pretty much stalls out by .500" lift. http://speedtalk.com/forum/viewtopic.ph ... 29#p535429 The spring pockets are stock diameter. We have a split set of 1.6/1.5 roller rockers going on the heads. This is not going to be a race motor, but a street driven tire smoker. I was hoping to get a response from someone with experience using the Crane 270 H06, it kind of stands out for the small duration and 106 LSA.

So true.

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Re: Mild sbc 383 cam recomendation.

Post by statsystems » Fri Apr 13, 2018 1:03 pm

Headguy wrote:
Fri Apr 13, 2018 12:36 pm
F-BIRD'88 wrote:
Fri Apr 13, 2018 11:32 am
A fun and very responsive short duration street solid

Comp Cams cs270B-6 #12-607-5
235-242 .495-.507 106 .020, .022
use Isky 235D stock dia springs
cool idle great street power and torque right where
you want it.
Will that cam work without 4 2bbl carbs?


I don't care who you are...that is damn funny right there^^^^^^^^^^^^^^^^^

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Re: Mild sbc 383 cam recomendation.

Post by cuisinartvette » Fri Apr 13, 2018 6:06 pm

Friend of mine ran that in his 72 Camino many yrs ago, he loved it. Worked brakes fine had a slight rump but made good torque. Used a simple performer intake, headers, Qjet the usualy 80s stuff. I believe it ran low 14s. For a heavy car with a 3.08 gear not bad.

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