Estimate hp/tq???
Thread Starter
Melting Slicks
Joined: Apr 2001
Posts: 3,399
Likes: 278
From: Olmsted Falls, Ohio
Estimate hp/tq???
I would appreciate it if someone could run estimated hp/tq numbers for me - Thanks in advance!
This is an L82 engine (stock bottom end) with all smog stuff removed
Transmission: M21 close-ratio 4-speed
Rearend: 3.55 positraction
Carb: Holley 670cfm Street Avenger
Intake manifold: Edelbrock 2101 Performer (heat crossover blocked and added lifter valley baffle to keep heat down)
Heads: S/R Torquer, 67cc chambers, 170cc intake runners, Manley 2.02I/1.60E valves, Comp Cams 1.52 roller tip rockers, Comp Cams valve springs, retainers & 7 deg locks
Pistons are the original aluminum, flat head, notched, slipper skirt (in very good condition)
Cam: Comp Cams XE262H, 0.462/0.469 lift, 218/224 deg duration, 110 deg LSA
Ignition: Rebuilt/Recurved HEI distributor with MSD 48kv coil in cap
Compresion ratio: I think should be 9.5-9.8:1 with steel shim head gaskets
Timing Chain: Cloyes double roller
Exhaust: 2-1/2 dual exhaust, no catalyic converter
Exhaust manifolds: Dynomax ceramic coated corvette headers 1-5/8" primaries
Fans: Dual electric (stock water pump driven fan removed)
This is an L82 engine (stock bottom end) with all smog stuff removed
Transmission: M21 close-ratio 4-speed
Rearend: 3.55 positraction
Carb: Holley 670cfm Street Avenger
Intake manifold: Edelbrock 2101 Performer (heat crossover blocked and added lifter valley baffle to keep heat down)
Heads: S/R Torquer, 67cc chambers, 170cc intake runners, Manley 2.02I/1.60E valves, Comp Cams 1.52 roller tip rockers, Comp Cams valve springs, retainers & 7 deg locks
Pistons are the original aluminum, flat head, notched, slipper skirt (in very good condition)
Cam: Comp Cams XE262H, 0.462/0.469 lift, 218/224 deg duration, 110 deg LSA
Ignition: Rebuilt/Recurved HEI distributor with MSD 48kv coil in cap
Compresion ratio: I think should be 9.5-9.8:1 with steel shim head gaskets
Timing Chain: Cloyes double roller
Exhaust: 2-1/2 dual exhaust, no catalyic converter
Exhaust manifolds: Dynomax ceramic coated corvette headers 1-5/8" primaries
Fans: Dual electric (stock water pump driven fan removed)
Melting Slicks
Joined: Dec 2000
Posts: 2,041
Likes: 0
From: Wichita, KS
Re: Estimate hp/tq??? (KenSny)
Ganey got a lucky guess! :jester
His numbers look exactly like my numbers from Desktop Dyno.
Your motor is very close to mine. I plan on putting my car on a dyno later this winter, I'll post the results.
His numbers look exactly like my numbers from Desktop Dyno.
Your motor is very close to mine. I plan on putting my car on a dyno later this winter, I'll post the results.
Thread Starter
Melting Slicks
Joined: Apr 2001
Posts: 3,399
Likes: 278
From: Olmsted Falls, Ohio
Re: Estimate hp/tq??? (1979toy)
Thanks Guys.... Now that all the parts are ready to go on, I'm having a hard time waiting until it's a few degrees warmer in the garage.
Thread Starter
Melting Slicks
Joined: Apr 2001
Posts: 3,399
Likes: 278
From: Olmsted Falls, Ohio
Re: Estimate hp/tq??? (69er)
I knew it wouldn't be anywhere near 375hp without a bigger cam and maybe smaller cc heads. But that's ok for me.
If I can get it up to 1hp/1ci at the flywheel the I'm satisfied for how I intend to drive the car.
I was debating not installing headers for awhile, but I think they are going to produce enough of a gain that it would be worth doing it now.
If I can get it up to 1hp/1ci at the flywheel the I'm satisfied for how I intend to drive the car.
I was debating not installing headers for awhile, but I think they are going to produce enough of a gain that it would be worth doing it now.
Thread Starter
Melting Slicks
Joined: Apr 2001
Posts: 3,399
Likes: 278
From: Olmsted Falls, Ohio
Re: Estimate hp/tq??? (KenSny)
One more question.
IF I did not install the headers now, how much of a loss by retaining the stock manifolds? 15-20hp? These are the rams-horn (straight down 2" dump).
IF I did not install the headers now, how much of a loss by retaining the stock manifolds? 15-20hp? These are the rams-horn (straight down 2" dump).
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Team Owner
Joined: Aug 1999
Posts: 28,709
Likes: 4
From: Fort Mill, SC via NJ
Re: Estimate hp/tq??? (KenSny)
Sorry Ken I can't answer your question but I also have one I'm hoping will be answered.
If I was at base 300 HP to begin with I would think I'd be at 375 HP or so with my mods.
Could I only have a 50HP increase over stock?
If I was at base 300 HP to begin with I would think I'd be at 375 HP or so with my mods.
Could I only have a 50HP increase over stock?
Melting Slicks
Joined: Dec 2000
Posts: 2,041
Likes: 0
From: Wichita, KS
Re: Estimate hp/tq??? (69er)
The numbers I had were 354 HP at 5000 RPM - 401 TQ at 3500 AND 4000 RPM using your first set up.
With stock exhaust manifolds the numbers are 318 HP at 5000 RPM and 377 TQ at 3500 RPM.
With stock exhaust manifolds the numbers are 318 HP at 5000 RPM and 377 TQ at 3500 RPM.
Thread Starter
Melting Slicks
Joined: Apr 2001
Posts: 3,399
Likes: 278
From: Olmsted Falls, Ohio
Re: Estimate hp/tq??? (1979toy)
Steve - Thanks. Just trying to think ahead to later in the year when I'll be dropping the gas tank to remove the bladder and I thought since I'll probably be dropping the rear exhaust anyway I'd get everything welded up for the change to headers at the same time. Guess I'll try to get those headers on as soon as I can for that kind of payback tho....
Team Owner
Joined: Sep 2001
Posts: 30,958
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From: Middletown Connecticut
Cruise-In IV Veteran
Re: Estimate hp/tq??? (KenSny)
i was wondering what i would make after i install new heads on my 327. is 400hp possible with this setup?
327 (+.030)
10:1 compression
280 duration .445"/.465" lift hyd cam
fuelie heads.. or reg 2.02/1.60 64cc heads (ported/polished)
1.5 roller rockers (or 1.6, havent decided yet)
weiand stealth dual plane intake
600 cfm holley carb (vac sec)
mallory unilite igniton
accel 8.8mm race wires
headers w dual heghaust
turbo timer, boost controler, bov that goes psshht! and a microwave timer that goes beep!
327 (+.030)
10:1 compression
280 duration .445"/.465" lift hyd cam
fuelie heads.. or reg 2.02/1.60 64cc heads (ported/polished)
1.5 roller rockers (or 1.6, havent decided yet)
weiand stealth dual plane intake
600 cfm holley carb (vac sec)
mallory unilite igniton
accel 8.8mm race wires
headers w dual heghaust
turbo timer, boost controler, bov that goes psshht! and a microwave timer that goes beep!
