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Post Info TOPIC: 383 Stroker...where to start?


A Poncho Legend!

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RE: 383 Stroker...where to start?


Pritch wrote:

Just another possibility . . . ever consider purchasing a DART 350, 4 bolt main with DART heads? Add a Voodoo cam kit and a 396 Stroker kit and numerous other goodies and you will be pushing 500 h.p. Definitely works for me in my '64 Custom Sport, M20.   Believe me; this is no dog!  PM me if you are interested in the details.  smile


         Whats the cost of it complete   he already has a new 4000.00 engine in it and a car weighing  800 lbs more than yours   



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Poncho Master!

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BIG, HEAVY CARS NEED TORQUE.

BIG BLOCKS HAVE TORQUE!



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   MIKE



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Complete, running engine almost $9000.00 as it appears in some of my earlier threads.

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--Pritch--

'76 Cougar XR7 (original owner); '52 Mercury Monterey 2 dr HT (Future Project)

2013 Mustang

2010 Ford Ranger

'93 MX5

'64 Custom Sport Ragtop (Factory M20)



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Background, skip if youre not interested

I have a 1968 Parisienne 2+2 which came new from the factory originally equipped with a 275hp 327 cid 4 bbl,  3 speed turbo 400 trans, 2.73 10 bolt differential. In the 1980s (before I owned the car) the original engine had some unspecified issues and went away. It was replaced with a mid-70s, 350 cid truck engine, about 195 hp. When I got the car it had no performance at all. I never drove it hard but it could barely break the tires loose. The engine ran fine, but I wanted an engine project to entertain myself. I acquired a 1968 vintage 275 hp 327 cid donor engine to work with.

 

The stroker engine specs.

                I rebuilt the 1968 327 cid engine into a stroker with about 385 cid, 9 to 1 compression. I replace everything that rotated or reciprocated in the engine with new premium parts, forged crank, rods, and pistons. I went with a moderate Lunati flat tappet cam, double roller chain. I topped it off with a re-cored radiator. Total investment was about 6000$, mostly machine shop charges.  I left a lot of horse power and torque on the table by using the original cast iron heads and manifolds by I like the look of originality. I also did not touch the original differential with the anemic 2.73 ratio.

 

My opinion.

                Bottom line is I like the end result. The Parisienne is no performance muscle car but it can at least get out of its own way. If you step on it the tires will break loose and it is a lot more fun to drive. The positive side of this combo is the effortless highway cruising, 70 mph all day long. Would a big block 454 be better, yes I am sure it would be, but big block 396 would be about the same as what I ended up with. Cost wise if you want the fun and education of building your own engine it will cost more than a crate engine, but the result is worth it. I think a small block stroker would be a bit cheaper to build than a big block engine.



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Canadian Poncho Superstar!

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 Thanks for the comments Guys,

 

Here's kind of what I've come up with so far. 

Relatively low compression, a nice sound at idle, and a nice smooth torque curve.

 

Summit Pre machined and clearanced roller block. 4.030 bore. 1Pc main.

   

Scat rotating kit. Balanced. Scat 9000 (cast iron) Crank

    

5.7" I Beam 2340 Rods. Hypereutectic pistons, 18cc Dished "D".

    

AFR 195CC heads. 65cc CNC'd chamber. Full CNC ported. PN 1040.

   

Fel Pro Head gasket (Thickness TBD)

      

Comp Cam XR270HR Roller cam.218/224@.50, .95/.502 lift. 110 LSA.

   

Comp Hyd roller lifters. Comp Pushrods. And springs if req.

    

Harland Sharp 1.5 ratio roller rockers

      

Cloyes Tru Roller timing set

       

Edelbrock RPM Air gap intake

       

Edelbrock Performer 750cfm

       

Pertronix Ignitor II billet dist. Pertronix coil.

     

Standard Flow oil pump

       

7qt oil pan

        

Somebodies 1 3/4" primary ceramic coated headers

     
          

Combo makes 9.57:1 compression. Assuming a deck clearance of .020, .020 gasket, 64cc head and dished 18cc piston.

          

On Comp Cams "CamQuest" free software this combo could make.Taken with a grain of salt of course.

.493 FT/lbs @ 4000. 484 HP @ 6000. On the 1 5/8 primary header.

   

Shows 504/511 on 1 3/4" Primaries.

      
          
          

Basically, I chose the lower cost Scat rotator, but spent the extra on what are said to be one of the best "Out of the box" heads.

A forged crank and pistons will add about 1K to the mix.

The above combo will be about 5K

    
          

Any thoughts (besides BB prodding!) on this combo?

     
          

Cheers. Mark

        
          


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65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 
tc


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Have you given any thought on a 406 cu.in. small block? (400cu.in. small block 30 over) I have two of these engines. One is an inexpensive engine ($3,500.00) with 9.75 to 1 compression and old school angle plug heads(cast iron) inexpensive roller valve train, small 700cfm carb and makes an honest 415hp. and 364 lbs. of torque. The other one is pretty much a race engine (Brodix heads, 14 to 1 compression etc.) but makes 583 hp. and 476 lbs. of torque. You can squeeze a lot of reliable power out of a small block engine.

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A Poncho Legend!

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OK  no more big block info    I must be a cheap bastard    but  5000.00  for a new small block to replace the new HO 350 small block ?    

wow   I'd leave it alone

and/or built a  small body car for what you are dropping on the beautifull BIG car



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Canadian Poncho Superstar!

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A 406 would certainly be an option if I could find a good 400 block. But what makes a 383 so intriguing to me, is the fact that so much is now available for that displacement. Not to mention the great breadth of information about it on the net. Without question, besides an LS, the 383 is the current hot SB power build. And its proven to easily make very good numbers. Another thing steering me this way is I can use a lot of stuff already in place with the HO350. Proven Cooling, accessory drives, charging, dist, fuel pump, headers, Trans, Converter, instrumentation, etc. And I even know a little about the SB as well.

I want to do this build myself, carefully, with my own hands, and the fact I can buy a nearly ready to build .030 over roller block for just over 700 USD seems pretty good. How much would it cost to have a 350 block done? 

I know 5K seems a lot, and it is, but understand, the HO350, although running nice, is not a new engine, and I have very little in it. But it still holds value towards the new motor, if I sell it off whole or as parts. There are ways to bring the build cost down. One would be to just rebuild and use the Vortec heads I have, and save at least $1400...but then I wouldn't have those shiny AFRs to admire.

Bottom line is the beautiful big car (thanks Carl!) is feeling pretty agile these days, and could really use at least 100 more of each...to start. And unfortunately, the smaller bodies just don't appeal to me.

Hopefully this makes some sense.

 

Cheers, Mark

 

 



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65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 


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I do not think you will be disappointed with a 383. They have plenty of torque. There is a 67 impala hardtop that shows up at our track now and then and its a high 11 low 12 second car all day.

 

Ian



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Poncho Master!

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Stroke a 454 BB to 496 and it'll scare you.It's a torque monster!!! But then again I'm kinda partial to BB's........

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I'm running a vortec block/heads with an eagle crank/rods/speed pro pistons. Screw in studs, beehive springs, mild port/polish on the heads. Comp xr276, similar spec'd to the one you listed. Rpm air gap intake, 770 street avenger Holley.

Desktop dyno told us its around the 400hp/450tq range. It's a solid little motor, in a 3600lb car. Averages about 15-20mpg. I'm quite happy with it, although a guy would always want something bigger/more power.

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A Poncho Legend!

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I changed my mind    

go with the best small block you can afford    

Install it and try it    

if you only need 100 HP  you may be OK ......       



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Canadian Poncho Superstar!

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427carl wrote:

I changed my mind    

go with the best small block you can afford    

Install it and try it    

if you only need 100 HP  you may be OK ......       


 Yeah, Yeah  100 horse.  The little small block I have sitting in my garage right now in the Chevelle is putting out 640 horse and I think it will give your big block a little competition.  You won't beat me by more than a couple of lengths.  I have really become a fan of these LS7engines.



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Jerel


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Neighbour got a GM crate 383. It is very strong. He's got it in a long box S15 but truck is pretty much a side show with that engine in there. It can take the 440 Roadrunner another neighbour has but it can't get away from the 454 LeMans, must be my gears.  I'd say a 383 is on par with a stock 454 in torque. Torque is what you are lacking  not HP. 383 Should be able to work well in the big Grande. 

The other thing I point out is there are only a handful of engines that draw a crowd at a cruise-in, a HEMI is #1 but for shear wow power a Chevrolet Big Block is right there. Just saying. 



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Ray White, Toronto ON

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jmont64 wrote:
427carl wrote:

I changed my mind    

go with the best small block you can afford    

Install it and try it    

if you only need 100 HP  you may be OK ......       


 Yeah, Yeah  100 horse.  The little small block I have sitting in my garage right now in the Chevelle is putting out 640 horse and I think it will give your big block a little competition.  You won't beat me by more than a couple of lengths.  I have really become a fan of these LS7engines.


           Your right Buddy    the LS series of engines are the bomb now      but as Ray says  the old school big block looks so cool 



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DEJ


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Well Mark
I am sure your heard the old saying, no replacement for displacement. Well that used to be the case, and for the most part it's still true. However, in todays world of engines, the buyer must decide how much torque he wants and at what rpm he wants to have it.
I am in the process of changing out a 350/290 hp that I purchased in 2009, mainly because of low torque at low rpm, bad curves for my application. I was going to use a rebuilt Mark IV 454 out of a 1974 Motor coach which according to my information would produce 185 hp and around 285 ft pds of torque. In todays market GM makes a small block 383 HT, which will out perform the old Mark IV 454 hands down. I just purchased one of these 383 HT's and it is rated at 435 ft pds of torque at 4000 rpm, however 400 ft pds of torque is reached at 3,000 rpm, hp is rated @ 345 hp at 4,500 rpm. I agree with the suggestion of getting a GM performance catalog and search through the choices, there are many. Good Luck

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Canadian Poncho Superstar!

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The plan changed some time ago. 

I'm building a 496 stroker. Figure you only live once, so why not go for the gusto!



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65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 


A Poncho Legend!

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And gas prices dropped too!

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1966 Strato Chief 2 door, 427 4 speed, 44,000 original miles "FAKE_66"



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jmont64 wrote:
427carl wrote:

I changed my mind    

go with the best small block you can afford    

Install it and try it    

if you only need 100 HP  you may be OK ......       


 Yeah, Yeah  100 horse.  The little small block I have sitting in my garage right now in the Chevelle is putting out 640 horse and I think it will give your big block a little competition.  You won't beat me by more than a couple of lengths.  I have really become a fan of these LS7engines.


 I'm sold on the new(ish) LS engines. If they weren't so "ugly" I'd run one in my '57. Hell a 525 hp LS-3 crate with electronics is damn reasonable...Davis GM here in Alberta has em for $8700

 

http://www.davisgmctrucks.ca/PartsAcc/Accessories/PerformanceEngines/LSSeries/tabid/38516/Default.aspx

 

Just scroll down. With the 6 bolt mains they take a crap load of boost without complaint too...



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cdnpont wrote:

The plan changed some time ago. 

I'm building a 496 stroker. Figure you only live once, so why not go for the gusto!


 DAMN RIGHT !!!

 

 

 



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