Street 383 build - Chevelle Tech
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post #1 of 27 (permalink) Old Oct 2nd, 19, 4:21 PM Thread Starter
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Matteo
 
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Street 383 build

I'm building my first engine, a 383.

I've been doing lots of reading, trying to educate myself on every aspect of engine building.

I'd really appreciate some input on my build. Nothing is permanent except for the fact that I will build the 383.


My aim is reliability, lots of low end torque, and pump gas.
At least 400 bhp would be nice.
It's going in a 68 El Camino with a m22z and 3.08 gears.
It'll be a weekend/daily driver.
Would like to keep power steering & brakes.
I plan on taking it on state wide trips.
All street, no strip.
It wont see much rpms over 4.5/5k.


With that said here is my basic part list.


1969 corvette block, 4 bolt main, .030 over

Eagle stroker Bottom End Kit, Fully balanced, 5.7 rods, hypereutectic pistons dished +12cc B13454E030
https://www.summitracing.com/oh/part...e030/overview/

Comp Cam kit SK12-432-8, 230/236 @ .50, .51 intake, .52 exhaust
https://www.compcams.com/xtreme-ener...all-block.html

Stamped Rocker Arms 1.6 Ratio, 11802c-16, https://www.summitracing.com/oh/part...c-16/overview/

Dart SHP 127122 Assembled Aluminum heads, 64cc,
https://www.summitracing.com/oh/part...7122/overview/

Fel-Pre 1142 Head Gaskets, 4.1 bore, .04 compressed thickness,
https://www.summitracing.com/oh/part...make/chevrolet

Edelbrock Performer RPM Dual Plane Intake Manifold
https://www.summitracing.com/int/par...make/chevrolet

1968 quadrajet 4mv

Factory GM HEI

ARP everything


Calculated Compression with assumed 9.025 deck height (don't know actual deck height): 9.7:1

Could I please have a review of this build?
Is this cam a good choice considering my target goals?
Opinions on whether or not I should run a higher (or lower) CR?

Keeping in mind my goals with this engine, what would you change? Add?

Thank you!!

Last edited by El_Bambino; Oct 2nd, 19 at 4:36 PM.
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post #2 of 27 (permalink) Old Oct 2nd, 19, 4:30 PM
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Tom
 
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Re: Street 383 build

Whatever heads you decide on I would buy from a builder that gets them bare and does their own valve job on. It may cost slightly more but at least you'll know the seats are concentric. Even high-end assembled heads have been found to have bad valve jobs. It may not affect power but it will increase longevity and reliability.

That's about all I'm qualified to add. I like keeping the Quadrajet but I personally would find a later one that has electric choke and the APT on the top.
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70 Camino...Roller

69 Malibu Stock 307, Reverse Manual TH350, 4,500 Stall Edge Converter, 4.56 Spool 35 Spline 12 Bolt

76 C20 VortecPro 496 628HP 655 lb/ft TH400 Edge Converter, 4.10 14 bolt
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post #3 of 27 (permalink) Old Oct 2nd, 19, 4:41 PM
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Rick
 
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Re: Street 383 build

First off, I do not like retail kits of any kind. You get what they want you to have.
I would go flat tappet cam. Others are having trouble with the HR and oil.
I would go with 6" rods, cam under .5.
Intake is ok, carb is ok if you can tune it, ignition is ok.
Best thing if you want to buy in kit form is to get with one of the pros here and let them set you up.
If you are not in a hurry call VortecPro and see if he will do one for you.
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post #4 of 27 (permalink) Old Oct 2nd, 19, 9:39 PM Thread Starter
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Matteo
 
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Re: Street 383 build

Thank you for your replies.

Tommy The Cat,

I appreciate your input about the heads. I'm heading to and engine builder Friday to have this block I have looked at. I'll ask him about some heads.
I thought about at least having the assemble heads looked over by a professional.
I love my quadrajet, it's been so good to me. Can't let it go!

-----

MrParticular,

I hear you on the retail kits. I still don't completely grasp how to pair parts. So I went with kits on this build.
I'll keep the flat tappet cam in mind.
From what I've read about 6" rods, the power gain is minute, and not worth the additional clearance issues & piston hunting. Thoughts?
Would vortecpro sell me a "kit"? I want to do the assembly myself.


-----

I'd really appreciate more input,

Thanks!!!
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post #5 of 27 (permalink) Old Oct 2nd, 19, 9:49 PM
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Jim
 
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Re: Street 383 build

If by bay area you mean San Fran, you have one of the best up the road about 160 miles.
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Jim

77 Monte
421 Profilers ported by Eric Weingartner, Straub HR 3200 conv. from Jake 200-4r w/ 3.73's
Machine work by Torvinen's machine
11.93 @ 112.7 & tuning
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post #6 of 27 (permalink) Old Oct 2nd, 19, 9:51 PM
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Re: Street 383 build

See if Chris Straub pipes in he can get you a cam that will hold up and do what you want.
Id cross that one off your list if youre doing cross country trips in it.


Do you have any heads yet
Have a new set that may work for you..maybe not. In ca

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post #7 of 27 (permalink) Old Oct 2nd, 19, 10:10 PM Thread Starter
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Matteo
 
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Re: Street 383 build

Quote:
Originally Posted by 77 cruiser View Post
If by bay area you mean San Fran, you have one of the best up the road about 160 miles.
Yeah, SF Bay...And who is that? 160 miles is a good trek.

Quote:
Originally Posted by cuisinartvette View Post
See if Chris Straub pipes in he can get you a cam that will hold up and do what you want.
Id cross that one off your list if youre doing cross country trips in it.


Do you have any heads yet
Have a new set that may work for you..maybe not. In ca
What are the specs?
Where in socal?
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post #8 of 27 (permalink) Old Oct 2nd, 19, 10:14 PM
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Tony
 
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Re: Street 383 build

Look at my sig and steal all of my good ideas. You'll enjoy it.

BTW: a modern 383 with any decent heads and a mid 220ish HR cam is 450/450 HP/TQ when tuned.

That said, I'm not a huge fan of that cam. I'd also take a Holley 3310 over that Q-Jet.

And don't listen to anyone that tells you that you need bigger heads. You DON"T.
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'69 Malibu 383/TCI TH350/8.2 3.36 Eaton Posi. Street Edge 10" 2800, E-Tec 170s, Custom Mike Jones HR Cam, RPM Air-Gap, StreetAvenger 770, Pertronix HEI, Hedman 1 5/8" Headers, Moser Axles, PMT 1320R Kit. [email protected] 111 MPH, 1.6865 60 ft, Nitto 555
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post #9 of 27 (permalink) Old Oct 2nd, 19, 10:22 PM Thread Starter
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Matteo
 
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Re: Street 383 build

Quote:
Originally Posted by blue_69_malibu View Post
Look at my sig and steal all of my good ideas. You'll enjoy it.

BTW: a modern 383 with any decent heads and a mid 220ish HR cam is 450/450 HP/TQ when tuned.

That said, I'm not a huge fan of that cam. I'd also take a Holley 3310 over that Q-Jet.

And don't listen to anyone that tells you that you need bigger heads. You DON"T.
If you have a good proven build, I'll copy it. I really don't mind, especially since this is my first build, and I don't quite get part pairing. As long as it doesn't break the bank either.
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post #10 of 27 (permalink) Old Oct 2nd, 19, 10:24 PM
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Tony
 
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Re: Street 383 build

The part pairing....or getting the combo right....is CRUCIAL. But 383s have been done and documented a ton over the past 15-20 years.

Good luck!!
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'69 Malibu 383/TCI TH350/8.2 3.36 Eaton Posi. Street Edge 10" 2800, E-Tec 170s, Custom Mike Jones HR Cam, RPM Air-Gap, StreetAvenger 770, Pertronix HEI, Hedman 1 5/8" Headers, Moser Axles, PMT 1320R Kit. [email protected] 111 MPH, 1.6865 60 ft, Nitto 555
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post #11 of 27 (permalink) Old Oct 2nd, 19, 10:58 PM
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Re: Street 383 build

Quote:
Originally Posted by El_Bambino View Post
Yeah, SF Bay...And who is that? 160 miles is a good trek.
https://www.lewisracingengines.com/

He's a member here, goes by Wolfplace. Pm him.

Jim

77 Monte
421 Profilers ported by Eric Weingartner, Straub HR 3200 conv. from Jake 200-4r w/ 3.73's
Machine work by Torvinen's machine
11.93 @ 112.7 & tuning
67 Imp.SS for the wife 275 hp 327-TH350
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post #12 of 27 (permalink) Old Oct 2nd, 19, 11:12 PM
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Tony
 
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Re: Street 383 build

Quote:
Originally Posted by 77 cruiser View Post
https://www.lewisracingengines.com/

He's a member here, goes by Wolfplace. Pm him.
Mike does excellent, top notch work...and has some really cool dogs!!
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'69 Malibu 383/TCI TH350/8.2 3.36 Eaton Posi. Street Edge 10" 2800, E-Tec 170s, Custom Mike Jones HR Cam, RPM Air-Gap, StreetAvenger 770, Pertronix HEI, Hedman 1 5/8" Headers, Moser Axles, PMT 1320R Kit. [email protected] 111 MPH, 1.6865 60 ft, Nitto 555
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post #13 of 27 (permalink) Old Oct 2nd, 19, 11:23 PM
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Brian
 
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Re: Street 383 build

I basically have your build in my 377 - except all forged bottom end. I am using that cam (the factory roller block version), with 1.6 stainless roller rockers, Dart SHP 127322 heads (200 CC), and an air gap dual plane intake. With the original crappy Pro Comp heads that were on there, the builder said that I should be at 450 HP, and 460-470 on torque. With the Dart heads, I don't know if those numbers improved or not.

My lower end is all forged - 4340 crank, 4340 H-beam rods, and Probe SRS forged pistons - 12 CC dish. Make sure that your valve springs are good for the extra lift - the 1.6 rockers will make that cam .544 intake, .555 exhaust - up from .510, .520. It runs fine, but be aware that you may only produce around 6" of vacuum at idle. It runs well and I take it to 6,000 RPM regularly. Mine likes a lot of pump shot from the carburetor - I was running the blue pump cam on my Speed Demon 750. With the Edelbrock Thunder AVS 2 800, I have the pump set to the strongest position (it is still a little finicky on this one). But, it pulls hard all way.

1971 Malibu, factory buckets/full gauges/console, 377 roller cammed small block, Turbo 400, 3.42 10 bolt posi (Buick), - All your base are belong to us.
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post #14 of 27 (permalink) Old Oct 2nd, 19, 11:46 PM
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Re: Street 383 build

Good luck with your build, there are more than a few competent machine shops in the Bay Area, if you are happy with yours you should be fine. Talk to them and see what combination they recommend, Iím sure they have built more than a few 383ís, if they havenít, then Iíd consider looking for someone else. Have you run your parts list by them? What did they have to say and why?

Steve R
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post #15 of 27 (permalink) Old Oct 2nd, 19, 11:59 PM
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Jeff
 
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Re: Street 383 build

383's are well sorted combos. I believe you will get what you want but I would go down to 220 range on the came for better street and daily driver you don't need a ton of cam and lift for a street bruiser. You should make your 400hp goal easy. It will be in the heads and intake as much as the cam. Good advice being given so far so not much else to say.

78 Malibu, 402, eddy heads, 174 B&M blower, th350, holley sniper EFI, 9" 3:70, 26X8.50-15 slicks.
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