[Rbace123]

Hi everyone,

Looking to build a 383 to replace the 355 I have now that is using oil like crazy. Found the below combination that is supposedly dyno tested and proven. Looks like it can be built for a reasonable price.

Displacement: 383 cu. in.
Carburetor: Holley 750 double pumper
Heads: Air Flow Research 190cc Street
Intake: Air Flow Research FloPower RPM
Camshaft: Comp Cams hydraulic roller, with 236/242° of duration @ 0.050 in. lift, and 0.520/0.540 in. lift
Headers: 1 3/4 in.
Distributor: MSD
Timing: 34°
Comp. Ratio: 9.5:1

MAX HP: 503 @ 5500
MAX Torque: 517 @ 4500


I want a street car that will be taken to the track sometimes. I am running a super T-10 trans now but eventually will go with the tremec TKO. How much difference would the above numbers be with a weiand X-celerator intake and a Holley 650 double pumper card. I already have those on the engine I have.

Thanks for all the help !!

 

[levisnteeshirt]

you can

do waaaaay better than the weiand xcelerator 7546 intake. If your gonna spend that kind of money , i'd go all the way and get an intake to match the quality of parts the rest of that package.

I just saw a 388 that went close to 500 hp with a Super Victor and a 750 dp , about the same set up, similar cam

 

[Rbace123]

Good information. I don't have a problem changing carb and intake if it's worth the difference. Just drawing on everyones knowledge here before moving forward.

Thanks !!!!

 

[Paul Wright]

You can read up on Artie's 383 build with Iron head Sportsman II's in Best of Archive above. Ran mid to low 11's at over 115 in a 3400 lb street Camaro. 500hp/500ft/lb with 1.6 intake rockers but track rules limiting it to 11.50 ET hindered further development.

AFR's have better potential with less work so you are on the right track.

 

[72Orange]

I have a 383, Vortec Heads, Air Gap intake, XE274 that made 463 TQ and 462 HP. The torque curve was nice and flat. It was broke in and dynoed with a Holley 750 DP.

Just some real world experience for you in case you were wondering.

 

[Rbace123]

383 Doug Herbert Short Block

Anyone used the doug herbert 383 short block ? They say it's balanced and clearanced already. Does that include cam clearancing also.

Thanks for the help

 

[The Big Al]

Anyone used the doug herbert 383 short block ? They say it's balanced and clearanced already. Does that include cam clearancing also.

Thanks for the help

You use a small base circle cam.

 

[bowtie0069]

I've been using small base circle cams for several years, but on my current 383, as well as my 410, I went back to standard size cams with no issues.

 

[veno]

the newer Scalloped I beam CAP SCREW rods have built in clearance for the cam now...

 

[Rbace123]

Veno how do I know if the kit from Doug Herbert uses those. It says the rods are " 6 inch scat forged I beam "

Thanks for the help !!!

 

[veno]

ASK?????....

call.. if they are the newer style capscrew rods.. they "should clear".. if the through bolt type.. then clearancing on the bolt head needs to be done....

If its a balance kit..... you really need to call.. and be sure...

then CHECK when you assemble for peace of mind

 

[Tom Griffin]

You suggested buildup is almost identical to my current build. I run the eagle I beam rods with no clearance issues and I am not running a small base cam.
My build has 10.7:1 compression and I run a efi setup instead of the carb.

It is a great street setup and would do ok at the track. I am considering freshening things up over the winter and switching from my old AFR 190's to the AFR 195 Eliminator heads.

Do they even make AFR 190's anymore?
Tg

 

[bowtie0069]

My 383 has 6" H-beams; the 410 has 5.85" H-beams..both clear.