![]() |
Register or Log In To remove these advertisements. |
|
|
![]() |
|
Thread Tools | Display Modes |
![]() |
#1 |
Registered User
Join Date: Jul 2007
Location: Salina, Kansas
Posts: 1,998
|
Engine Horsepower Question
im just wondering....my engine was rebuilt about 10,000 miles ago by a guy who builds race engines......its a 402 big block..edelbrock performance intake..k&n air filter..performance heads....idk what kind they are...bored .30 over...holly 4 barrel double pumper..i think its a 750?...distributor is has points....mechanical fuel pump..premium gas...400 turbo tranny with a shift kit.....im 16 years old and i was wondering how much horsepower im pushin out at the wheels
|
![]() |
![]() |
![]() |
#2 |
Dave's not here, man
Join Date: Jun 2004
Location: Winder, Georgia
Posts: 2,000
|
Re: Engine Horsepower Question
Not sure, but I'll bet it's quite a bit. You're pretty lucky to have a motor like that. There's lots of guys that would love to have a powerplant as nice as yours. Have you thought about taking it for a dyno run?
__________________
- 2014 VW Jetta - 2015 VW Jetta - 1966 Ford F-250 Last edited by dave2953; 11-20-2007 at 12:24 AM. |
![]() |
![]() |
![]() |
#3 | |
Registered User
Join Date: Oct 2006
Location: Cheney, KS
Posts: 669
|
Re: Engine Horsepower Question
Who in Kansas did you buy that from? Is it a black GMC?
If Im thinking right, that might be the old engine I had in my S-15. Edit: Nevermind...I looked at your profile thing and see that its a green Chevy. Your not the person Im thinking of.
__________________
Quote:
Last edited by Slammed70; 11-20-2007 at 12:46 AM. |
|
![]() |
![]() |
![]() |
#4 |
Account Suspended
Join Date: Sep 2005
Location: Monroe, WA
Posts: 3,815
|
Re: Engine Horsepower Question
Share the cam specs and I'll give a pretty good guess
![]() |
![]() |
![]() |
![]() |
#5 |
Registered User
Join Date: Jun 2005
Location: Midlothian, VA
Posts: 148
|
Re: Engine Horsepower Question
You could ask around to barrow a G-Tech Pro.
Nice engine. Please take care of it.
__________________
![]() 383 Stroker - Edlebrock Air Gap intake and 670 CFM Holley Street Avenger carb. Hooker Comp Headers w/ X-Pipe and 2.25 duals TKO-500 & 3.08:1 rear I Love HEMI's, they're soft & chewy! ![]() |
![]() |
![]() |
![]() |
#6 | |
Registered User
Join Date: Oct 2006
Location: Cheney, KS
Posts: 669
|
Re: Engine Horsepower Question
Oooo-ooo, do mine...
1973 SBC 350-.030 over Stock crank Speedpro "Powerforged" flat top pistons Total-seal TSS rings Lunati Voodoo .468/.489 lift 262/268 duration Pete Jackson "Noisy" gear drive Roades V-max hydraulic lifters 0.039 head gaskets Dart "Iron eagle" heads 180cc/64cc and 2.02/1.60 Pro comp 1.5 shaft-mount roller rockers Edelbrock Performer RPM intake 1.5 inch spacer Holley "Street Avenger" 770CFM Cheap chrome aircleaner with cheap paper 6" element MSD Pro-Billet with Autozone coil (Gimp, I know but shut up) MSD "Street fire" 8mm wires Neal Chance 1800ish stall converter TH350 with B&M "Steet" Transpak Hedman "Block hugger" headers 2.5 duals with Flowmaster 1 chamber "race only" mufflers Were guessing around 10:1 compresion and around 420+HP/400+TQ with an RPM range of 2000-6000. What do you think?
__________________
Quote:
Last edited by Slammed70; 11-20-2007 at 02:43 AM. Reason: Forgot I had exhaust |
|
![]() |
![]() |
![]() |
#7 | |
Senior Member
Join Date: Apr 2005
Location: Joppa, Maryland
Posts: 4,408
|
Re: Engine Horsepower Question
Quote:
__________________
1997 GMC Sierra Ext 1965 Mustang |
|
![]() |
![]() |
![]() |
#8 | |
Registered User
Join Date: Oct 2006
Location: Cheney, KS
Posts: 669
|
Re: Engine Horsepower Question
Wow, we were close....or as close as Desktop Dyno will guess apparently.
__________________
Quote:
|
|
![]() |
![]() |
![]() |
#9 |
Registered User
Join Date: Jun 2007
Location: peaster,tx
Posts: 59
|
Re: Engine Horsepower Question
70gmcer what information do u need for input in that chart
|
![]() |
![]() |
![]() |
#10 |
Senior Member
Join Date: Apr 2005
Location: Joppa, Maryland
Posts: 4,408
|
Re: Engine Horsepower Question
Compression, cam specs, carb specs, cylinder head type and size of valves, type of intake manifold and if you are using headers.
__________________
1997 GMC Sierra Ext 1965 Mustang |
![]() |
![]() |
![]() |
#11 |
Registered User
Join Date: Feb 2007
Location: (Cloverdale) Surrey BC Canada
Posts: 1,566
|
Re: Engine Horsepower Question
what program are you using for the dyno?
__________________
Travis
travis_moffatt@hotmail.com ![]() 1969 Chevrolet C-10 LWB, 350c.i., TH350, In Pieces. 1991 GMC Sonoma, IROCS s10 grill 1963 Ford Galaxie 351/C4 |
![]() |
![]() |
![]() |
#12 |
Account Suspended
Join Date: Sep 2005
Location: Monroe, WA
Posts: 3,815
|
Re: Engine Horsepower Question
|
![]() |
![]() |
![]() |
#13 | |
Registered User
Join Date: May 2007
Location: Moore, Oklahoma
Posts: 2,396
|
Re: Engine Horsepower Question
Quote:
But i am making my guess under the assumption that the heads are basically stock and it has an RV type cam |
|
![]() |
![]() |
![]() |
#14 |
Senior Member
Join Date: Aug 2002
Location: Valley Center KS
Posts: 3,525
|
Re: Engine Horsepower Question
yeah, the cam selection is going to be the variable that determines the power the most. I mean, if you take the exact same engine and put in a stock type low duration, low lift cam you'd be looking at low to mid 200 HP. Put in a high lift long duration cam and you could easily see over 400.
The heads, intake, and exhaust also all factor into this, but the cam is the main factor. |
![]() |
![]() |
![]() |
#15 |
Registered User
Join Date: Dec 2006
Location: Idaho
Posts: 210
|
Re: Engine Horsepower Question
Is that an AC compressor on the left side in that picture? What mounting bracket are you using for that?
__________________
72 C2500 LWB 402 Sierra Grande 05 Odyssey 08 Tundra |
![]() |
![]() |
![]() |
#16 | |
Senior Member
Join Date: Apr 2005
Location: Joppa, Maryland
Posts: 4,408
|
Re: Engine Horsepower Question
Quote:
__________________
1997 GMC Sierra Ext 1965 Mustang |
|
![]() |
![]() |
![]() |
#17 |
I'm a poor spectator
Join Date: Aug 2006
Location: San Antonio, Tx
Posts: 2,287
|
Re: Engine Horsepower Question
I was wondering the same thing.
__________________
2006 Jeep Unlimited IMPACT ORANGE 1993 Chevy 2500 4x4 ExCab LWB 454/NV4500 Tow rig ![]() 1977 Ford F100 2x4 LWB 1st truck I owned, still have it!!! ![]() 1979 Ford F150 4x4 SWB Built Ford Tough!!! ![]() 1971 Chevy Blazer 350 / SM465 / NP205 UNDER CONSTRUCTION Soon to have a LQ4 6.0!!! |
![]() |
![]() |
![]() |
#18 |
Registered User
Join Date: Jul 2007
Location: Salina, Kansas
Posts: 1,998
|
Re: Engine Horsepower Question
yeah its the ac thing...i dont know how its like that....some dude whho builds race engines built my engine....the heads are performance heads all i know and its bored over .030 or something like that.....all i know is that....it can do a second gear tire squeel and its an automatic
|
![]() |
![]() |
![]() |
#19 |
Registered User
Join Date: Mar 2005
Location: 10-Uh-See
Posts: 5,609
|
Re: Engine Horsepower Question
I would definetly change that points distributor to an HEI for more reliable spark.
__________________
|
![]() |
![]() |
![]() |
#20 |
Registered User
Join Date: Jul 2007
Location: Salina, Kansas
Posts: 1,998
|
Re: Engine Horsepower Question
im going to eventually when its warmer outside..to cold for me to work on it right now in this season
|
![]() |
![]() |
![]() |
#21 |
Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
|
Re: Engine Horsepower Question
So Tim; Where in Kansas are you residing?
Can you get more info on the engine build? You have some of the basics, but there are some serious power builder tems we need to know. |
![]() |
![]() |
![]() |
#22 |
Java Mechanic
Join Date: Jun 2005
Location: Martinsburg, WV
Posts: 6,764
|
Re: Engine Horsepower Question
I'm gonna throw some 'sketi at the wall and guess somewhere between about 260 and 300hp at the rear wheels.
__________________
Keith 11 Lincoln MKT -- Momma's wagon ![]() 13 G37xS -- middle age crazy car 68 C20 Fleetside -- RIP Decorating the whole town up at a cost of $27 .... |
![]() |
![]() |
![]() |
#23 |
Senior Member
![]() Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,365
|
Re: Engine Horsepower Question
Wasn't the factory 402BB rated at 310hp.
![]() ![]()
__________________
A husband can be right...or...A husband can be happy. ![]() 67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk. ![]() 1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc ![]() ![]() JOHN 17:3...The better side of "LIFE" Remember: Everyday is a good day...Some are just gooder! |
![]() |
![]() |
![]() |
#24 |
Java Mechanic
Join Date: Jun 2005
Location: Martinsburg, WV
Posts: 6,764
|
Re: Engine Horsepower Question
That would be gross HP at the flywheel though, not SAE net.
__________________
Keith 11 Lincoln MKT -- Momma's wagon ![]() 13 G37xS -- middle age crazy car 68 C20 Fleetside -- RIP Decorating the whole town up at a cost of $27 .... |
![]() |
![]() |
![]() |
#25 |
Registered User
Join Date: Dec 2006
Location: Rhode Island
Posts: 602
|
Re: Engine Horsepower Question
Assuming it's 400 HP at the flywheel (a little high for a 402 unless it's got a pretty steep cam to go with the parts listed), my guess is about 300 RWHP. You'll loose 25% or more getting to the road because of the drivetrain friction/heat loss. Alternator, power steering and water pump probably weren't figured in into that 400 rating either, so there goes another 25-40 rear wheel horses. A rear wheel dyno pull or two for about $75 should tell all.
BTW, I envy you having a truck like this at 16 years old. All I could afford at your age was mom and dad's "hand-me-down" 61 Buick Invicta. It took me 35 years to get what you have now, a BBC Classic Chevy truck. Take care of it. Resist the temptation to drive carelessly. That's quite a jewel. If the temptation gets too great, let me know and I'll come buy it from you! ![]()
__________________
69 C-10 SWB Fleetside 454/TH400 (For Sale) http://67-72chevytrucks.com/vboard/c...ct=1299&cat=12 70 El Camino 454 TH700 29 Model A 4-DR Sedan Deluxe |
![]() |
![]() |
![]() |
Bookmarks |
|
|