6.0 Monza lives
08-27-2011, 06:32 PM
#1
On The Tree
Thread Starter
6.0 Monza lives I got the wifes car back together. Longgg story. I built the motor like Car Craft's 550 hp with a 6.0. It's an LQ4 with LS3 heads. I upgraded to Katech rod bolts and Comp BeeHive springs. Using the GM single-plane intake and right now have a 750 with annular boosters. Hard to tell as the street tires are useless. The car was 2850lbs with the old 406 with aluminum heads, waterpump. Ran 11.06@120. Old combo made 387 rwhp. Hoping for 430-440 with the 6.0. If the car hooks it should be in the tens.
Aleck
Aleck
08-28-2011, 09:42 PM
#5
On The Tree
Thread Starter
Cam/converter Cam is a Comp XR281HR .571"/.573",228/230@0.050., 112 LSA.
Converter is a custom Nitrous Ready Neal Chance 8". This converter is really tight as it pulls the motor down when idling in gear. I know, it's hard to believe. Drives like a very low 1800-2200 stall until you nail it. Because of this converter I've been afraid to build an overdrive and and maybe lose the way the present converter works. After the dyno this week I'll need to play with the tranny governor to change the shift points in drive. The old 406 ran low 11's in drive, Kelly left the line @1,000rpm in drive, it shifted @6,000, went thru the eyes @6,000. Was great combo.Never broke a thing in 10 years and 20,000 miles except for the driveshaft once. Have a box of et slips dating back to 2001.
Aleck
Converter is a custom Nitrous Ready Neal Chance 8". This converter is really tight as it pulls the motor down when idling in gear. I know, it's hard to believe. Drives like a very low 1800-2200 stall until you nail it. Because of this converter I've been afraid to build an overdrive and and maybe lose the way the present converter works. After the dyno this week I'll need to play with the tranny governor to change the shift points in drive. The old 406 ran low 11's in drive, Kelly left the line @1,000rpm in drive, it shifted @6,000, went thru the eyes @6,000. Was great combo.Never broke a thing in 10 years and 20,000 miles except for the driveshaft once. Have a box of et slips dating back to 2001.
Aleck
08-29-2011, 06:46 PM
#6
On The Tree
Thread Starter
Annular booster vs. down-leg booster Ran the Monza on the dyno to-day. Made 400rwhp. This is with truck manifolds modified to fit the chassis. I'm thinking headers are being built this winter.
I also tried two different main bodies. Both are 750, one has down-leg boosters the other has annnular. I swapped just the main body, used the same base,metering blocks , jetting and fuel bowls. The down-leg main body needed 3 jet sizes more in the front to keep the A/F around 14.5 at 3,000rpm
cruise . This proves that the annular boosters pull fuel easier. I also added 3 jet sizes to the rear and the main airbleeds were reduced from .035 to .031. This kept the A/F the same almost everywhere. I made a total of 25 pulls. I tried 28*-36* total timing. The most power was made with 33*. They made with-in 1hp of each other. Also the motor made best power at 13.4 A/F with both carbs.
I now have proof that the annular carb made the same power. I need to try both main bodies at the track. The old motor prefered the annular boosters for throttle response and 60'. Keep in mind KC leaves the line at 1,000rpm.
So I hope to get to the track Sat to get a few runs to see if the car can get into the tens before I get kicked out as no rollbar.
Aleck
I also tried two different main bodies. Both are 750, one has down-leg boosters the other has annnular. I swapped just the main body, used the same base,metering blocks , jetting and fuel bowls. The down-leg main body needed 3 jet sizes more in the front to keep the A/F around 14.5 at 3,000rpm
cruise . This proves that the annular boosters pull fuel easier. I also added 3 jet sizes to the rear and the main airbleeds were reduced from .035 to .031. This kept the A/F the same almost everywhere. I made a total of 25 pulls. I tried 28*-36* total timing. The most power was made with 33*. They made with-in 1hp of each other. Also the motor made best power at 13.4 A/F with both carbs.
I now have proof that the annular carb made the same power. I need to try both main bodies at the track. The old motor prefered the annular boosters for throttle response and 60'. Keep in mind KC leaves the line at 1,000rpm.
So I hope to get to the track Sat to get a few runs to see if the car can get into the tens before I get kicked out as no rollbar.
Aleck
Trending Topics
08-31-2011, 09:50 PM
#11
On The Tree
Thread Starter
I'm not the best with computers. The dyno has it's own computer of course, but I'm not sure how to get the graph and bring it home to post on here. I need to get my wife to come to work with me. I could print it off then scan it.
Other problem is because the car has an 8" converter the power readings are not very accurate below the converters flash. I started the pulls @2,500 rpm, hit the throttle and the car jumps to 4,200 before it pulls hard against the rollers. I could try an "all gear pull" , this starts from a stop and wind it out thru the gears.
For you Tigger you need to know about power near 2,500 rpm and up. If it was a stick I could pull from 2,000rpm to see what the torque is like.
I have a full day on the dyno Thursday with Open wheel stock car. Friday I'm working 1/2 day then going racing. Hopefully next week back on the dyno with our car.
Aleck
Other problem is because the car has an 8" converter the power readings are not very accurate below the converters flash. I started the pulls @2,500 rpm, hit the throttle and the car jumps to 4,200 before it pulls hard against the rollers. I could try an "all gear pull" , this starts from a stop and wind it out thru the gears.
For you Tigger you need to know about power near 2,500 rpm and up. If it was a stick I could pull from 2,000rpm to see what the torque is like.
I have a full day on the dyno Thursday with Open wheel stock car. Friday I'm working 1/2 day then going racing. Hopefully next week back on the dyno with our car.
Aleck
09-02-2011, 08:17 AM
#13
On The Tree
Thread Starter
I picked it because I just wanted to thro the engine together and I saw Car Craft made 550 hp with this cam and the L92 heads.
I know that I need 15* more duration on the exhaust because I'm using manifolds and the motor needs all the help in the exhaust area.
YES, I know it's wrong . I bought it for $250 new from a guy needing cash. It got me running for this year. I plan on building a more serious motor with flat top pistons and valve notches for a bigger cam.
All I wanted was to get the motor mounts and cooling system built this year. I'm also building headers this winter.
I'm looking at a custom grind somewhere around
230/246@ 0.050", .590/.620 and 108 lobe sep angle , installed with a 106 intake centerline.
Aleck
I know that I need 15* more duration on the exhaust because I'm using manifolds and the motor needs all the help in the exhaust area.
YES, I know it's wrong . I bought it for $250 new from a guy needing cash. It got me running for this year. I plan on building a more serious motor with flat top pistons and valve notches for a bigger cam.
All I wanted was to get the motor mounts and cooling system built this year. I'm also building headers this winter.
I'm looking at a custom grind somewhere around
230/246@ 0.050", .590/.620 and 108 lobe sep angle , installed with a 106 intake centerline.
Aleck
09-02-2011, 08:22 AM
#14
On The Tree
Thread Starter
Track to-night. I figure two passes before Kelly gets kicked out. No roll bar. If the car 60's like it has before @ 1.42 it should be low 11's high 10's.
It's supposed to be 90* with humidex around 100*.
If they spray the track we are good for low 60'.
The car has a 235x60 M/T ET Street drag radial.
Aleck
It's supposed to be 90* with humidex around 100*.
If they spray the track we are good for low 60'.
The car has a 235x60 M/T ET Street drag radial.
Aleck
09-03-2011, 04:59 PM
#17
10 Second Club
iTrader: (4)
Join Date: Jan 2004
Location: Martin Mi
Posts: 1,068
Likes: 0
Received 0 Likes
on
0 Posts
Im really interested in seeing what he ran. Im building a motor close to his with a custom cam in a car 100 lbs lighter. Your killing me here stinky, lol. Eric L
09-07-2011, 05:49 PM
#20
On The Tree
Thread Starter
Times are in Sorry for the delay guys, KC had us very busy for the holiday weekend.
Friday night was very hot here. The temp was 88* with humidex of 105*. Crazy. The track is at 600' but was reading 3200'.86% humidity.
Best run was 11.98@113 with a 60' of 1.75. I think 1/8 was 7.70@91.
This was a personal worst. KC was happy to be back racing, disapointed but glad to be back.
We left the car in drive and it was shifting just shy of 6,000. Max power on the dyno is 6,700.
I know more et can be found shifting higher, but I also know that the air was killing the car.
I went back to the dyno Sat morning to see where the power was. Still made 400 at the wheels. The air was still nasty. The dyno correction was 1.2. That's 20%. I've never seen that before.
I tried the spacer with no change in the power curve.
I'll try to post the dyno sheets. The motor really lays down in the upper rpm due to lack of headers and the cam choice.
Still 400 whp in 2850lb car should work better.
We are hoping to go racing this Friday and the weather looks like low 70's.
I have been crazy busy on the dyno with customers last week and this week. Friday is open, so I'm going to try more stuff before we go to the track.
Aleck
Friday night was very hot here. The temp was 88* with humidex of 105*. Crazy. The track is at 600' but was reading 3200'.86% humidity.
Best run was 11.98@113 with a 60' of 1.75. I think 1/8 was 7.70@91.
This was a personal worst. KC was happy to be back racing, disapointed but glad to be back.
We left the car in drive and it was shifting just shy of 6,000. Max power on the dyno is 6,700.
I know more et can be found shifting higher, but I also know that the air was killing the car.
I went back to the dyno Sat morning to see where the power was. Still made 400 at the wheels. The air was still nasty. The dyno correction was 1.2. That's 20%. I've never seen that before.
I tried the spacer with no change in the power curve.
I'll try to post the dyno sheets. The motor really lays down in the upper rpm due to lack of headers and the cam choice.
Still 400 whp in 2850lb car should work better.
We are hoping to go racing this Friday and the weather looks like low 70's.
I have been crazy busy on the dyno with customers last week and this week. Friday is open, so I'm going to try more stuff before we go to the track.
Aleck