eng combo HP Tq est?
Thread Starter
Tech Contributor
Joined: Aug 1999
Posts: 15,160
Likes: 3,965
From: Connecticut, USA
eng combo HP Tq est?
Can someone guesstimate or desktop dyno this combo for me? Putting together info on current and potential mods.
Thanks Gary.
350CI
4bolt mains
cast pistons-9:1
WP SR Torquers 67 cc 202/160
Performer intake
750 Q-Jet
1 5/8" headers into 2.5" chambered
Comp 270H or 268XE cam
CC 1,5 roller tip rockers
Stock point dist, 40k volt coil
may go into the 69 M-20 373
Thanks Gary.
350CI
4bolt mains
cast pistons-9:1
WP SR Torquers 67 cc 202/160
Performer intake
750 Q-Jet
1 5/8" headers into 2.5" chambered
Comp 270H or 268XE cam
CC 1,5 roller tip rockers
Stock point dist, 40k volt coil
may go into the 69 M-20 373
Racer
Joined: Jul 2001
Posts: 281
Likes: 1
From: SA
Re: eng combo HP Tq est? (Flareside)
[img] http://www.users.bigpond.net.au/retrostyle/CV350.gif
[/img]
[img] http://www.users.bigpond.net.au/retr...cv350parts.gif
[/img]
Its all there. Parts and Dyno results with graph. Turns out similar to the one above. Slightly more power.
Cant work out how to post em as pics here.
[Modified by xrated, 8:40 AM 5/30/2002]
[Modified by xrated, 8:50 AM 5/30/2002]
[/img]
[img] http://www.users.bigpond.net.au/retr...cv350parts.gif
[/img]
Its all there. Parts and Dyno results with graph. Turns out similar to the one above. Slightly more power.
Cant work out how to post em as pics here.
[Modified by xrated, 8:40 AM 5/30/2002]
[Modified by xrated, 8:50 AM 5/30/2002]
Drifting
Joined: Jul 2000
Posts: 1,266
Likes: 0
From: Allen, TX, USA
Re: eng combo HP Tq est? (Flareside)
Flare;
You should run the compression estimator and show the assumptions on
head gasket thickness/piston crown/quench area.
I would think that you will get more than 9:1 compression. Thus your
graphs would go up about 10-20 HP.
BTW, you have the cam with no advance - Comp Cams are built with 4 degress
advance. Should this be put in there? That will increase high end
power...
Safety Car
Joined: Dec 1999
Posts: 4,148
Likes: 5
From: Roxbury NJ
Re: eng combo HP Tq est? (adam)
Flare;
You should run the compression estimator and show the assumptions on
head gasket thickness/piston crown/quench area.
I would think that you will get more than 9:1 compression. Thus your
graphs would go up about 10-20 HP.
BTW, you have the cam with no advance - Comp Cams are built with 4 degress
advance. Should this be put in there? That will increase high end
power...
You should run the compression estimator and show the assumptions on
head gasket thickness/piston crown/quench area.
I would think that you will get more than 9:1 compression. Thus your
graphs would go up about 10-20 HP.
BTW, you have the cam with no advance - Comp Cams are built with 4 degress
advance. Should this be put in there? That will increase high end
power...
Regardless of how you get there, 9:1 is 9:1. You may be right, he may be higher, but there's now way of knowing that without actually cc'ing everything.
If you would like to simulate a cam with a ground in advance, you would do it in the cam specs. For instance, a 110 LSA cam with 4 degrees ground in would have a 106 intake centerline. The "advance" window in the main screen is to simulate the installed position (as in, a timing set with advanced and retarded settings). Does that make sense? :D
Thread Starter
Tech Contributor
Joined: Aug 1999
Posts: 15,160
Likes: 3,965
From: Connecticut, USA
Re: eng combo HP Tq est? (Flareside)
Thanks Joe, I appreciate it.
Looks like a 350Hp-380ft combo not bad but how would I get to 400HP or over 400 ft/lbs? Again this in the designing stages.
Gary :cheers:
Looks like a 350Hp-380ft combo not bad but how would I get to 400HP or over 400 ft/lbs? Again this in the designing stages.
Gary :cheers:
Drifting
Joined: Jul 2000
Posts: 1,266
Likes: 0
From: Allen, TX, USA
Re: eng combo HP Tq est? (Flareside)
Flare;
I was thinking that 9:1 may be understating the compression. As you mention
CC's is necessary and correct math. The calculator may be more accurate
and will give a good estimate to work towards.
As to getting 400 tq/hp, 10:1 or better compression helps,
ported heads (torquer is a good start) A Crane 274 gives a little
higher hp (at higher rpms) at a small exchange for tq.
Thread Starter
Tech Contributor
Joined: Aug 1999
Posts: 15,160
Likes: 3,965
From: Connecticut, USA
Re: eng combo HP Tq est? (adam)
Thanks Adam,
I don't want to push the CR beyond 9-9.5 and a cam more then the 270 or 268XE might not be what I like in a driver.
Gary
I don't want to push the CR beyond 9-9.5 and a cam more then the 270 or 268XE might not be what I like in a driver.
Gary
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: eng combo HP Tq est? (Flareside)
Flareside,
if you have time - would be great if you could desktop dyno my new engine: A mule engine with the same setup was dynoed at 465 HP.
I wonder what the Dyno2000 would calculate for this engine:
Here are the components:
383 ci
9.8:1 compression (Hyperutectic Pistons)
steel crank
Custom Ground solid cam 248/238 degrees @.050 and .545/.525 lift
Dart Iron Eagle Heads with 64cc chambers and 215cc intake runners - ported and 2.05/1.60 valves
Performer RPM Intake
LUNATI Roller Rockers 1.5 Ratio
Holley 750 carb
:cheers:
Olivier
[Modified by GrandSportC3, 11:40 PM 5/30/2002]
if you have time - would be great if you could desktop dyno my new engine: A mule engine with the same setup was dynoed at 465 HP.
I wonder what the Dyno2000 would calculate for this engine:
Here are the components:
383 ci
9.8:1 compression (Hyperutectic Pistons)
steel crank
Custom Ground solid cam 248/238 degrees @.050 and .545/.525 lift
Dart Iron Eagle Heads with 64cc chambers and 215cc intake runners - ported and 2.05/1.60 valves
Performer RPM Intake
LUNATI Roller Rockers 1.5 Ratio
Holley 750 carb
:cheers:
Olivier
[Modified by GrandSportC3, 11:40 PM 5/30/2002]
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: eng combo HP Tq est? (shoptek)
Oliver,
When is the new motor due???
Sounds like a nice combo.
Are you going to the Tower Shops tomorrow nite?
When is the new motor due???
Sounds like a nice combo.
Are you going to the Tower Shops tomorrow nite?
:cheers:
Olivier
P.S. I will be at the Tower Shops tomorrow if the weather will be ok!
However - I won't stay too long because I will drive my Duntov to Clearwater for the weekend. I will also take the Duntov tomorrow to the Tower Shops!!!
[Modified by GrandSportC3, 11:38 PM 5/30/2002]
Safety Car
Joined: Dec 1999
Posts: 4,148
Likes: 5
From: Roxbury NJ
Re: eng combo HP Tq est? (GrandSportC3)
Olivier, to simulate an engine with ported heads, you would need the actual flow numbers for those heads after the porting work. At that point, they are basically "one of a kind".
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: eng combo HP Tq est? (Flareside)
Olivier, to simulate an engine with ported heads, you would need the actual flow numbers for those heads after the porting work. At that point, they are basically "one of a kind".
[Modified by GrandSportC3, 9:44 AM 5/31/2002]
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: eng combo HP Tq est? (Flareside)
Sorry Olivier, but I don't have a file for those heads. Maybe one of the small block guys will have what you need.
:cheers:
Olivier