Back from the strip w/vid
Thread Starter
Melting Slicks
Joined: Sep 2004
Posts: 3,226
Likes: 670
From: Northeast
Back from the strip w/vid
Last year I went to the dragstrip for the first time. Something I always wanted to do. The best was a 15.9 and 91mph and at the time happy I fullfilled my desire to be on a 1/4 mile run.
Returned yesterday for street nite at New England Dragway in New Hampshire. 120 mile one way trip.
I have a 78 L82, 4spd close ratio with 3:70 rearend. It has 99,400 miles on the matching numbers motor. There is a different cam, Edlebrock Performer rpm intake, original Quadrajet carb, K&N open element filter, March underdrive pulley system, and recently installed true dual exhaust, no cats, with Magnaflow mufflers. Original exhaust manifolds, no headers. And yes, plenty of "bling" under the hood right down to the wiper cover
.
Decided my shift points would be at 5500rpm and it worked. New best time of 14.9 @ 94.78 mph. 3rd gear pretty much got me close to the finish line but I did have to go into 4th. It was cool & traction was not very good. Everyone mentioned this problem, as I.
Racing my friend's 96 NSX. He has a redline of 8000
click on
Since 1 sec is alot faster I can only conclude that the higher shift points and true dual exhaust is the cause. Nothing else done. No matter it was fun.
Returned yesterday for street nite at New England Dragway in New Hampshire. 120 mile one way trip.
I have a 78 L82, 4spd close ratio with 3:70 rearend. It has 99,400 miles on the matching numbers motor. There is a different cam, Edlebrock Performer rpm intake, original Quadrajet carb, K&N open element filter, March underdrive pulley system, and recently installed true dual exhaust, no cats, with Magnaflow mufflers. Original exhaust manifolds, no headers. And yes, plenty of "bling" under the hood right down to the wiper cover
.Decided my shift points would be at 5500rpm and it worked. New best time of 14.9 @ 94.78 mph. 3rd gear pretty much got me close to the finish line but I did have to go into 4th. It was cool & traction was not very good. Everyone mentioned this problem, as I.
Racing my friend's 96 NSX. He has a redline of 8000
click on
Since 1 sec is alot faster I can only conclude that the higher shift points and true dual exhaust is the cause. Nothing else done. No matter it was fun.
Le Mans Master
Joined: May 2002
Posts: 5,086
Likes: 786
From: Lebanon Township New Jersey
With a better launch you should be able to knock 5 tenths off your ET since you're running close to 95 mph. If you can get to the track when they are running some bracket racing instead of time trials, test and tune etc. they might have the starting line prepped better which would help you, even on street tires. 14.4 would be nice.
Thread Starter
Melting Slicks
Joined: Sep 2004
Posts: 3,226
Likes: 670
From: Northeast
This is a street nite event so you really are not racing anyone but yourself in your track. :
What can you tell me about this slip? Dont know how much more out of this engine I can get without some major changes, except the recurve.
PS. Tasca Ford was there with the fastest Cobra Jet and they sprayed something on the track for him, as I heard it.
What can you tell me about this slip? Dont know how much more out of this engine I can get without some major changes, except the recurve.
PS. Tasca Ford was there with the fastest Cobra Jet and they sprayed something on the track for him, as I heard it.
Last edited by BKarol; Sep 22, 2011 at 02:10 PM.
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Well, I'm not a Corvette IRS drag guy...but your reaction time is good; 60' shows there's lots of room for improvement. Someone smarter and more experienced than I would have to offer suggestions on getting a C3 to hook without breaking things 
Until you can get it to hook - more power will not equal better ET/trap.
Remember: There is no such thing as too much horsepower; only too little tire
Until you can get it to hook - more power will not equal better ET/trap.
Remember: There is no such thing as too much horsepower; only too little tire
Le Mans Master
Joined: May 2002
Posts: 5,086
Likes: 786
From: Lebanon Township New Jersey
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Le Mans Master
Joined: Oct 2007
Posts: 7,454
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From: RI, Now Franklin/Nashville TN
Bill,
There are still some non believers that your pretty stock L-82 with almost 100,000 miles on the engine with the stock SMOG 882 heads produced about 250 RWHP with true magnaflow 2.5 inch duals, no headers, and the unknown cam with probably less than 9:1 compression.
Can you post the dyno sheet from last year (192 RWHP) with the stock 2-1-2 OEM exhaust with no cat and this year's dyno sheet with the 2.5 magnaflow mufflers true duals (248 RWHP) with the 882 smog heads and the OEM cast iron manifolds (no headers)?
Trying to make a point about the power potential of pretty stock L-82's and the amount of power they can make with minimal changes using the rather restrictive OEM 882 heads. As you and I spoke, a very good set of aluminum/cast iron heads with the right cam on a fresher engine (my L-82?) with some sort of header would probably make an additional 50 HP!
Jeff
There are still some non believers that your pretty stock L-82 with almost 100,000 miles on the engine with the stock SMOG 882 heads produced about 250 RWHP with true magnaflow 2.5 inch duals, no headers, and the unknown cam with probably less than 9:1 compression.
Can you post the dyno sheet from last year (192 RWHP) with the stock 2-1-2 OEM exhaust with no cat and this year's dyno sheet with the 2.5 magnaflow mufflers true duals (248 RWHP) with the 882 smog heads and the OEM cast iron manifolds (no headers)?
Trying to make a point about the power potential of pretty stock L-82's and the amount of power they can make with minimal changes using the rather restrictive OEM 882 heads. As you and I spoke, a very good set of aluminum/cast iron heads with the right cam on a fresher engine (my L-82?) with some sort of header would probably make an additional 50 HP!
Jeff
Last edited by jb78L-82; Sep 22, 2011 at 04:11 PM.
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Thread Starter
Melting Slicks
Joined: Sep 2004
Posts: 3,226
Likes: 670
From: Northeast
Guess I didnt make myself clear. Didnt worry about the reaction time because you are not racing anyone. You are in your own lane doing your own thing, looking at your own numbers. Look at the 60' mark. I got to 60' mark quicker than the Honda could. Again reaction didnt mean anything.
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
That's exactly what my stock Turbo PT Cruiser runs. It would be a fun heads up race that came down to reaction time :cheers 15.066 @ 90 mph flat, don't despair it is relatively easy to get down to 14's and then 13's if you want to continue 
Last edited by MotorHead; Sep 22, 2011 at 08:08 PM.
Le Mans Master
Joined: Oct 2007
Posts: 7,454
Likes: 977
From: RI, Now Franklin/Nashville TN
Don't know much about drag racing (road racer) but I can tell you that the stock L-82 is NOT a bottom end engine (it has poor low end power) but it is a pretty good mid to high RPM engine (highest Torque @ 3,600 RPM, Highest HP @ 5,200 RPM). The L-82 is much better suited to the 4 speed tranny for this reason and actually faster in 78/79 than the automatic for a variety of reasons (3.70 gears, less drivetrain loss HP with the 4spd, etc). 4 Spd 0-60 MPH 6.5 secs, auto-6.6.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Guess I didnt make myself clear. Didnt worry about the reaction time because you are not racing anyone. You are in your own lane doing your own thing, looking at your own numbers. Look at the 60' mark. I got to 60' mark quicker than the Honda could. Again reaction didnt mean anything.
Scott
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Bill,
There are still some non believers that your pretty stock L-82 with almost 100,000 miles on the engine with the stock SMOG 882 heads produced about 250 RWHP with true magnaflow 2.5 inch duals, no headers, and the unknown cam with probably less than 9:1 compression.
Can you post the dyno sheet from last year (192 RWHP) with the stock 2-1-2 OEM exhaust with no cat and this year's dyno sheet with the 2.5 magnaflow mufflers true duals (248 RWHP) with the 882 smog heads and the OEM cast iron manifolds (no headers)?
Trying to make a point about the power potential of pretty stock L-82's and the amount of power they can make with minimal changes using the rather restrictive OEM 882 heads. As you and I spoke, a very good set of aluminum/cast iron heads with the right cam on a fresher engine (my L-82?) with some sort of header would probably make an additional 50 HP!
Jeff
There are still some non believers that your pretty stock L-82 with almost 100,000 miles on the engine with the stock SMOG 882 heads produced about 250 RWHP with true magnaflow 2.5 inch duals, no headers, and the unknown cam with probably less than 9:1 compression.
Can you post the dyno sheet from last year (192 RWHP) with the stock 2-1-2 OEM exhaust with no cat and this year's dyno sheet with the 2.5 magnaflow mufflers true duals (248 RWHP) with the 882 smog heads and the OEM cast iron manifolds (no headers)?
Trying to make a point about the power potential of pretty stock L-82's and the amount of power they can make with minimal changes using the rather restrictive OEM 882 heads. As you and I spoke, a very good set of aluminum/cast iron heads with the right cam on a fresher engine (my L-82?) with some sort of header would probably make an additional 50 HP!
Jeff
Hey, I'm just yankin' yer chain, man!! Actually what you say makes sense to me, isn't the L82 basically just the same thing as the old L46 350/350 engine, de-tuned with 9:1 CR instead of 11:1 CR?
Scott
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Don't know much about drag racing (road racer) but I can tell you that the stock L-82 is NOT a bottom end engine (it has poor low end power) but it is a pretty good mid to high RPM engine (highest Torque @ 3,600 RPM, Highest HP @ 5,200 RPM). The L-82 is much better suited to the 4 speed tranny for this reason and actually faster in 78/79 than the automatic for a variety of reasons (3.70 gears, less drivetrain loss HP with the 4spd, etc). 4 Spd 0-60 MPH 6.5 secs, auto-6.6.
Le Mans Master
Joined: Oct 2007
Posts: 7,454
Likes: 977
From: RI, Now Franklin/Nashville TN
Big bottom end power, faster 60 foot time, as long as you can put the power down. L-82 are not know for having grunt down low but come alive mid to high RPM. Does that help?
Last edited by jb78L-82; Sep 22, 2011 at 08:50 PM.
Race Director
Joined: Apr 2000
Posts: 17,676
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
The stock Turbo Pt puts out 215 HP and 245 Tq
I ran 121 MPH and didn't break 13 sec into the 12's now that embarrassing. can't find that one but did find another one the same night 117.8mph @ 13.113 et. 2 second 60 ft. then after I spun the tires second and third, wasn't until 3/4 track did the rear wheels hook up.
Last edited by MotorHead; Sep 22, 2011 at 09:07 PM.