Slobalt - Page 3

Charles Stewart · 10-27-2023, 01:22 PM

Hi Mr.Buth,
Since there is no NHRA accepted products for your specific engine L61 134 cu.in.at this time (and just in case you didn’t know that website) go to ZZP Performance website. There may be a few interesting parts for your car/engine L61 set-up and some really good tech/ explanation related to those parts that may help you.

Ellis V Buth · 12-05-2023, 04:06 PM

Fall Classic in Indy marked the end of our 2023 season. Andrew Fidler was still waiting on parts for his stocker, so he continued to drive the Cobalt. Leading up to the Fall Classic Andrew worked on fabricating a new weight box which will let us move the weight towards the front of the car. That's the only change from St. Louis...and while we see no change in ET the car did stop spinning and the reaction out of the beams became much more raceable.

We end the season with a best run of 16.02 and 2 full weekends of consistent runs under the index. If we had the faster oil in the car at Fall Classic, I believe we would have seen a 15.9x timeslip from it! So in year 1, we saw a gain of 1 second and significant testing time and lessons learned. We were able to complete the season with all upgrades and maintenance for right at $2,000.

This winter, we plan on going thru the head and getting stronger valve springs, installing an electric water pump to get rid of the one driven by the engine, setting up the electric fan to be controlled by the driver, replacing the rocker panels that are the only real rusted spots on the car and getting the car painted.

After that, if the budget allows, we will see about getting a more favorable gear ratio for the stock setup as we believe we have one of the gear ratios that falls "in the middle" of the available options for the 2.2L setup from the factory. We are also going to start looking for a spare engine that we can work with and try to make some improvements or at least have a "fresh" engine that doesn't have 160,000 miles on it.

Now that we have a "proof of concept" season in the books, our goal is to make the car as quick as possible. Our hopes are to be able to run 1 second under in DF/S trim which would put us solidly under in CF/S trim as well.

Charles Stewart · 12-08-2023, 12:25 PM

Hi Mr. Buth,
If you take the time to read the GM sport compact performance build book part number 88958728, you will find there some very interesting details/suggestions for your L61 engine.
Since no race parts are accepted for your engine in the NHRA accepted products listing, you must read between the lines here.

https://docs.google.com/file/d/0BxzZ...UpUdZN92YfEmkQ

Ellis V Buth · 04-24-2024, 03:27 PM

After a long winter that saw multiple other projects taking longer than expected, the Slobalt sat outside and got no attention until early April.

Despite sitting all winter, she started right up! Andrew pulled her into the shop to remove the balance shafts from the engine and get the car ready for the season. While performing this task, he found a major issue where the tensioner for the timing chain had a bolt broken off and allowing some slop in the timing chain. Quick fix, but could have certainly led to major disaster!

The removal of the balance shafts and related components resulted in a little over 5lbs of rotating weight removed from the equation. In addition to that, we put an electric water pump on as well. We also installed gauges in the car so we can actually tell what RPM, temperature, and oil pressure we are running at! We also made the switch from C11 to Sunoco Purple.

Tested it out at a bracket race at Indy a couple weeks ago...and we finally saw the 15.90's pop up on the board! The air wasn't bad...but not great either. And we had a pesky wind that couldn't make up its mind which way it wanted to blow. The air was somewhere between .07 and .10 slower than the air we had in St. Louis last fall, so take our 15.99 compared to that 16.02 from last fall and the changes seem to have picked us up another 1/10 of a second!

Driver/builder Andrew was also able to pick up his first round win with this car in eliminations that day which felt like throwing the proverbial monkey off his back for sure.

If weather cooperates, we will have the car out testing/racing again this weekend at Indy to see if we can find some more performance.

Billy Nees · 04-24-2024, 03:47 PM

Ellis, don't disregard the wheel alignment! I aligned the Cav last fall (it was really bad!) and hadn't had it out 'til last Sunday and was quite surprised! I haven't figured out just what it was worth yet but it was significant! Much more than a RWD car would have been.

10-27-2023, 01:22 PM	#21
Charles Stewart Member Join Date: Jul 2016 Location: Rivière-du-Loup, (QC) Canada Posts: 277 Likes: 1,107 Liked 480 Times in 145 Posts	Re: Slobalt Hi Mr.Buth, Since there is no NHRA accepted products for your specific engine L61 134 cu.in.at this time (and just in case you didn’t know that website) go to ZZP Performance website. There may be a few interesting parts for your car/engine L61 set-up and some really good tech/ explanation related to those parts that may help you.

12-05-2023, 04:06 PM	#22
Ellis V Buth Junior Member Join Date: Sep 2015 Posts: 83 Likes: 44 Liked 290 Times in 56 Posts	Re: Slobalt Fall Classic in Indy marked the end of our 2023 season. Andrew Fidler was still waiting on parts for his stocker, so he continued to drive the Cobalt. Leading up to the Fall Classic Andrew worked on fabricating a new weight box which will let us move the weight towards the front of the car. That's the only change from St. Louis...and while we see no change in ET the car did stop spinning and the reaction out of the beams became much more raceable. We end the season with a best run of 16.02 and 2 full weekends of consistent runs under the index. If we had the faster oil in the car at Fall Classic, I believe we would have seen a 15.9x timeslip from it! So in year 1, we saw a gain of 1 second and significant testing time and lessons learned. We were able to complete the season with all upgrades and maintenance for right at $2,000. This winter, we plan on going thru the head and getting stronger valve springs, installing an electric water pump to get rid of the one driven by the engine, setting up the electric fan to be controlled by the driver, replacing the rocker panels that are the only real rusted spots on the car and getting the car painted. After that, if the budget allows, we will see about getting a more favorable gear ratio for the stock setup as we believe we have one of the gear ratios that falls "in the middle" of the available options for the 2.2L setup from the factory. We are also going to start looking for a spare engine that we can work with and try to make some improvements or at least have a "fresh" engine that doesn't have 160,000 miles on it. Now that we have a "proof of concept" season in the books, our goal is to make the car as quick as possible. Our hopes are to be able to run 1 second under in DF/S trim which would put us solidly under in CF/S trim as well. Attached Thumbnails

12-08-2023, 12:25 PM	#23
Charles Stewart Member Join Date: Jul 2016 Location: Rivière-du-Loup, (QC) Canada Posts: 277 Likes: 1,107 Liked 480 Times in 145 Posts	Re: Slobalt Hi Mr. Buth, If you take the time to read the GM sport compact performance build book part number 88958728, you will find there some very interesting details/suggestions for your L61 engine. Since no race parts are accepted for your engine in the NHRA accepted products listing, you must read between the lines here. https://docs.google.com/file/d/0BxzZ...UpUdZN92YfEmkQ Last edited by Charles Stewart; 12-08-2023 at 12:35 PM.

04-24-2024, 03:27 PM	#24
Ellis V Buth Junior Member Join Date: Sep 2015 Posts: 83 Likes: 44 Liked 290 Times in 56 Posts	Re: Slobalt After a long winter that saw multiple other projects taking longer than expected, the Slobalt sat outside and got no attention until early April. Despite sitting all winter, she started right up! Andrew pulled her into the shop to remove the balance shafts from the engine and get the car ready for the season. While performing this task, he found a major issue where the tensioner for the timing chain had a bolt broken off and allowing some slop in the timing chain. Quick fix, but could have certainly led to major disaster! The removal of the balance shafts and related components resulted in a little over 5lbs of rotating weight removed from the equation. In addition to that, we put an electric water pump on as well. We also installed gauges in the car so we can actually tell what RPM, temperature, and oil pressure we are running at! We also made the switch from C11 to Sunoco Purple. Tested it out at a bracket race at Indy a couple weeks ago...and we finally saw the 15.90's pop up on the board! The air wasn't bad...but not great either. And we had a pesky wind that couldn't make up its mind which way it wanted to blow. The air was somewhere between .07 and .10 slower than the air we had in St. Louis last fall, so take our 15.99 compared to that 16.02 from last fall and the changes seem to have picked us up another 1/10 of a second! Driver/builder Andrew was also able to pick up his first round win with this car in eliminations that day which felt like throwing the proverbial monkey off his back for sure. If weather cooperates, we will have the car out testing/racing again this weekend at Indy to see if we can find some more performance. Last edited by Ellis V Buth; 04-25-2024 at 10:42 AM. Reason: Accuracy of Information

04-24-2024, 03:47 PM	#25
Billy Nees VIP Member Join Date: Oct 2002 Location: On a hilltop in Pa. Posts: 4,223 Likes: 3,103 Liked 6,791 Times in 1,524 Posts	Re: Slobalt Ellis, don't disregard the wheel alignment! I aligned the Cav last fall (it was really bad!) and hadn't had it out 'til last Sunday and was quite surprised! I haven't figured out just what it was worth yet but it was significant! Much more than a RWD car would have been. __________________ Billy Nees 1188 STK, SS World's greatest Under-Achiever!