[Chris/75]

Thought i would post and ask all the engine guys hear your opinion on the horsepower and torque numbers on my 383 Stroker In my 1970 Chevelle.
Thought i would put it on the Team Chevelle Dyno! LOL!

383 Stroker kit
4 Bolt Main 350 block bored 30 over, and decked.
11 to 1 comp.
Forged Pistons
Eagle Forged Steel Crank
Eagle Forged Steel Rods.
All ARP Bolts and studs.
Windage Trey
Comp Cams 294S Cam (248 Duration @ .050, .525 Lift, 110 Lobe Sep.)
Comp Cams Matching Valve springs
Comp Cams Magnum Pushrods
Comp cams 1.52 Magnum Roller Rockers
Comp Cams Screw in Studs,& Guideplates
Dart Iron Eagle 200 CC Heads With 2.08 Intake & 1.625 Exhaust Valves with a Max Flow Competition Valve Job and are Fully Ported (Flow Bench #s below)
Edelbrock RPM Air-Gap Intake port matched to heads.
Holley 750 Double-Pumper
Hypertech HEI Igniton, Moroso Ultra 40 Race Wires.
Hooker 1" 3/4 Super Comp Ceramic Coated Headers
Flowmaster American Thunder Exhaust W/ H-Pipe & Delta Flow Mufflers

Flow Bench Numbers on Heads...

Lift Intake Exhaust
.300 .205 .165
.400 .248 .195
.500 .278 .225
.600 .286 .241
.700 .285 .255

I built this Engine with the help of a Engine Builder here in Richmond VA, who is a good freind of my Fathers. Moter runs strong.Just wanted to see what you guys thought as far as the Horsepower and Torque Numbers would be.
Thanks so much! And Happy New Year!!!

 

[bracketchev1221]

ok I'll guess 480hp 450 torque.

 

[onovakind67]

With a production water pump and stock fan:

RPM···········2500····3000····3500····4000····4500····5000····5500····6000····6500····7000
Brake_Tq······337·····384·····413·····426·····436·····430·····413·····387·····348·····308
Brake_HP······160·····220·····275·····325·····374·····409·····432·····442·····431·····410
Exh_Pres······.3······.5······.7······1.0·····1.3·····1.6·····1.9·····2.2·····2.4·····2.6
Int_Vacuum····.1······.2······.3······.4······.6······.8······.9······1.1·····1.2·····1.3
Vol_Eff_%·····74.0····81.0····85.8····89.7····93.3····94.5····94.0····92.4····90.5····88.5
Actual_CFM····220·····290·····358·····427·····500·····563·····616·····661·····701·····739
Fuel_Flow·····80.6····106·····131·····156·····183·····206·····225·····241·····256·····270
A/F_Mix_Qal···98.3····100.0···100.0···100.0···100.0···100.0···100.0···100.0···100.0···100.0
BSFC··········.503····.482····.475····.481····.489····.503····.521····.546····.594····.658
BSAC··········6.309···6.048···5.963···6.038···6.134···6.310···6.537···6.853···7.455···8.256
Friction_HP···28······38······50······64······82······102·····125·····152·····196·····248
Mach_#········.186····.223····.260····.297····.334····.371····.409····.446····.483····.520
Piston_Spd····1563····1875····2188····2500····2813····3125····3438····3750····4063····4375
Piston_Gs·····442·····637·····867·····1133····1433····1770····2141····2548····2991····3468
Overlap_%VE···-3.7····-1.5····-1.5····-1.6····-.9·····-1.0····-1.3····-1.8····-1.9····-1.8
Int_AvgVel····140·····168·····195·····223·····251·····279·····307·····335·····363·····391
In_InertiaPrs·.6······1.2·····1.8·····2.3·····2.6·····2.8·····2.7·····2.6·····2.3·····2.0
In_ResTunPrs··0.0·····0.0·····0.0·····0.0·····0.0·····0.0·····0.0·····0.0·····0.0·····0.0
Ex_AvgVel·····155·····186·····217·····249·····280·····311·····342·····373·····404·····435
ExTun_Prs·····.6······-.3·····-.6·····-.8·····-1.4····-1.7····-1.7····-1.3····-1.2····-1.3
Valve_Toss····None····None····None····None····None····None····None····None····None····None
Spark_Adv·····27······28······30······32······33······34······34······35······35······36

 

[BillsCamino]

Looks like a nice combo... :thumbsup:

 

[Chris/75]

Thanks for the reply.Keep em coming!
This engine is in a 1970 Chevelle.It has a TCI Streetfighter Tranny with a TCI 10" Streetfighter 3000 converter and a B&M ratchet shifter. I have 3.73 rear with 255/60/15s.What do you think it will run in the quater mile? I hope to run it in the spring and just wondering what i can expect.Im hoping for 12s.Might add some slicks later on for trips to the track, but will start out with street tires as i plan on mostly driving to our local cruise-ins on saturdays and will probally only run it a few times a year
to clean the carbon out. LOL! Thanks.

 

[Chris/75]

Bump

 

[onebadd66]

I have a simular set up to yours. I'm running the hyd. version of your cam.,and alittle smaller head(AFR 195)Car may be alittle lighter too.Last year the car ran 11:70'[email protected] consistant.This year wiil be a different story

 

[Chris/75]

I have a simular set up to yours. I'm running the hyd. version of your cam.,and alittle smaller head(AFR 195)Car may be alittle lighter too.Last year the car ran 11:70'[email protected] consistant.This year wiil be a different story

Hey Steev! Wow you do have one Bad 66!!! Nice car! What do you expect from it this year? Making changes? Thanks.

 

[383Vette]

That cam in a 383 with AFR195 heads made 540HP in a magazine write up. With good tuning, and your heads..i say 490ish hp.

 

[greg_moreira]

you sure bout those exhaust numbers? Those are big numbers there. Not that Im flat out doubting them....they are just surprising thats all. Right around mid lift, your approaching an 80% IE ratio....and it climbs from there up to about 90%. Just thought Id ask.

 

[greg_moreira]

Oh, by the way....like the combo. If its an all out bracketer, it would probably benefit with a bit more carb and with proper gearing and the right converter, it may like a single plane as well. But still, the parts youve got now are plenty capable of feeding it well and should be plenty fine for a fast motor that sees some street time too.

 

[Chris/75]

you sure bout those exhaust numbers? Those are big numbers there. Not that Im flat out doubting them....they are just surprising thats all. Right around mid lift, your approaching an 80% IE ratio....and it climbs from there up to about 90%. Just thought Id ask.

Hey Greg. Surprising enough thats the numbers the flowbench gave us.The guy who did the heads had lots of experiance with these heads, and is pretty good with this stuff building race moters everyday.He built the heads for a 400 Small Block of his own but desided to do a big block Instead so he gave me a great deal on the heads. I had planned on the AFR 195 heads but after looking at these heads, and the deal he was giving me, i went with these. After seeing these heads on the flow bench,i was pretty excited about them. I have to say im pleased with em, the engine runs very strong!
Thanks.

 

[NOS327]

I'm with Greg, those appear to be maybe before and after intake flow numbers. 89.5 E/I ratio is unheard of. Most people make engines run VERY well with peak numbers like 285intake 210 exhaust which is just over 73% (approximatly what the competition package AFR195s flow).


475hp/480tq

 

[Chris/75]

I'm with Greg, those appear to be maybe before and after intake flow numbers. 89.5 E/I ratio is unheard of. Most people make engines run VERY well with peak numbers like 285intake 210 exhaust which is just over 73% (approximatly what the competition package AFR195s flow).


475hp/480tq

They arent before and after flow numbers,they are indeed intake and exhaust numbers, I saw them with my own eyes! I was surprised and very pleased to say the least. I had planned on going with the AFR195S but i got a deal on these heads from a freind of mine who builds engines and race cars.But One day ill build my 454 i have sitting in the corner of my garage....

 

[Wolfplace]

They arent before and after flow numbers,they are indeed intake and exhaust numbers, I saw them with my own eyes! I was surprised and very pleased to say the least. I had planned on going with the AFR195S but i got a deal on these heads from a freind of mine who builds engines and race cars.But One day ill build my 454 i have sitting in the corner of my garage....

Flow Bench Numbers on Heads...

Lift Intake Exhaust
.300 .205 .165
.400 .248 .195
.500 .278 .225
.600 .286 .241
.700 .285 .255

=
Not tryin to just be argumentative here but the guys are right.
There is just no way any conventional 23 degree type Chevy SB head is going to flow those numbers on the exhaust side.
There was something wrong with the test if those are the numbers you saw.
My first guess it the head was not properly bolted down to the adapter or the adapter was not bolted to the bench or the bench had an internal leak in the exhaust mode.
Again, not saying you didn't see the numbers just telling you something was wrong with the test.