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Username Post: Street Motor or not really??        (Topic#356016)
Willow 
Contributor
Posts: 172

Reg: 05-25-12
04-14-19 07:52 PM - Post#2764235    

Hi All:
Is the following sbc 383 to much for a”Streetable Engine?

Scat f43 light weight crank 6inch h beam rods dome probe pistons all 4340 internals 0010 block dart eagle iron 230cc heads with 7/16 scorpion rockers 1.6 with a comp xe294 cam 2500 7200 rpm power band with compression around 12.94.1
Pump gas or not?
Thanks in advanceđź‘Ť



 


japete92 
"5th Year" Silver Supporting Member
Posts: 1165
japete92
Loc: No. Virginia
Reg: 01-18-13
04-15-19 07:26 AM - Post#2764261    
    In response to Willow

  • Willow Said:
Hi All:
Is the following sbc 383 to much for a”Streetable Engine?

Scat f43 light weight crank 6inch h beam rods dome probe pistons all 4340 internals 0010 block dart eagle iron 230cc heads with 7/16 scorpion rockers 1.6 with a comp xe294 cam 2500 7200 rpm power band with compression around 12.94.1
Pump gas or not?
Thanks in advanceđź‘Ť




"Streetable"? Depends on you're definition of 'streetabe', how you intend to drive the car, and the drive train. It would be too much for me. But I don't run my car much past 4000 rpm. A power band in those rpms would benefit from a close ratio 4 speed and 4.11 rear. Long tube headers would be necessary to achieve full potential.

My 383 puts out 400 + lb-ft of torque from about 2k-4k rpm. Max is 440 at 3800. Just perfect for me with my wide ratio 4 speed and 3.36 rear. It is very typical of the generic BB from the '60s with a little over 360 hp, over 400 lb-ft torque, and a red line around 5k. No headers, no $$$$ racing parts, just a plain Jane production type engine built more for reliability than high performance.

Just my opinion. NOT being critical.

Pete



 
scrambldcj8 
Silver Supporting Member
Posts: 2434
scrambldcj8
Loc: Belchertown, MA
Reg: 04-06-03
04-15-19 07:52 AM - Post#2764264    
    In response to Willow

Pump gas? Most likely not.....



 
rumrumm 
"18th Year" Silver Supporting Member
Posts: 2082
rumrumm
Loc: Macomb, IL
Reg: 10-18-01
04-15-19 12:08 PM - Post#2764278    
    In response to Willow

My 383 dynoed at 450 hp and 468 ft lbs of torque, and it is very streetable. It idles at 775 rpm. AFR 190 heads, SRP forged flat top pistons (10.6:1 compression), Magnum 280 hydraulic flat tappet cam, Edelbrock RPM intake matched to heads. It was built back in 2003. Good breathing heads make the power. The trick is making everything match. If I was building this engine now, I would use a comparable hydraulic roller and AFR 195 heads due to updates but keep everything else the same. You don't necessarily have to go big to make power.

Lynn

"There's no 12-step program for stupid."


383 sbc, Eagle, AFR, SRP, CompCams, Edelbrock, FiTECH. Dyno #'s: 450 hp @ 5700, 468 lb. ft. of torque @ 4300.



 
sz0k30 
"10th Year" Gold Supporting Member
Posts: 406
sz0k30
Loc: Oakland Co., Michigan
Reg: 10-12-08
04-16-19 09:03 AM - Post#2764334    
    In response to Willow

With that RPM range & 13 to 1 compression ratio, I would say very unlikely.



 
rumrumm 
"18th Year" Silver Supporting Member
Posts: 2082
rumrumm
Loc: Macomb, IL
Reg: 10-18-01
04-16-19 10:55 AM - Post#2764342    
    In response to Willow

What is your intended use for this engine?

Lynn

"There's no 12-step program for stupid."


383 sbc, Eagle, AFR, SRP, CompCams, Edelbrock, FiTECH. Dyno #'s: 450 hp @ 5700, 468 lb. ft. of torque @ 4300.



 
Shepherd 
Frequent Contributor
Posts: 1699

Loc: Lake George, NY
Reg: 11-11-15
04-16-19 01:04 PM - Post#2764348    
    In response to sz0k30

Agreed, crazy compression for pump gas, even with a big cam. Loose convertor, and least 3.70s , then barely "streetable".



 
grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17284
grumpyvette
Age: 71
Loc: FLORIDA USA
Reg: 03-16-01
04-17-19 06:50 AM - Post#2764384    
    In response to Shepherd

http://garage.grumpysperformance.com/index.php?thr...

you might want to read through this thread and consider closely duplicating a know too work well on the street sbc combo designed to run on premium pump gas
keep in mind greatly increased durability and longevity at the cost of only a few peak hp in a street driven car engine is always a good trade off.

IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


 


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