Slobalt

Ellis V Buth · 10-20-2023, 02:44 PM

Quote:

Originally Posted by David Lee

it seems that the 2005 and 2006 2,2 have locked ecm. is it possible to use a 2007 ecm?

Yes, or a Cavalier ECM. You'll find out later in the saga which route we choose to go.

David Lee · 10-20-2023, 03:29 PM

Quote:

Originally Posted by Ellis V Buth

Yes, or a Cavalier ECM. You'll find out later in the saga which route we choose to go.

Thanks

Ellis V Buth · 10-24-2023, 01:05 PM

This post will catch us up to before the Fall Classic.

After Columbus, we tested multiple things and tried many different theories. We procured a set of NOS 7x19.5 slicks that are a bit softer than the road race/circle track tires we had. We read Billy Nees build thread on the Cavalier and tried some of the tricks he tried (flopping the cams specifically) but our results for all of these tests yielded a series of runs between 16.53 and 16.51 in the morning air at each track (Indy, BG, testing at various bracket events and Wild Wednesday). A few of our tests (smaller injectors to try and help the 10:1 AFR with the stock tune while waiting on the new computer to arrive) resulted in significantly slower runs. We even tried tricking the car into thinking it was running at a different temperature to try and get the AFR back in line and resulted in significantly slower runs!

We were able to procure an 05 Cavalier computer and wiring harness which will allow us to tune the car. Getting away from the stock computer and moving to a tuneable ECM ended up being the proper solution. We found a company in Michigan that had all the equipment and it came pre-loaded with their "drag race tune" and we took it to the 1/8 mile track in Terre Haute. The AFR and timing curve are specifically what interests us initially...AFR being pegged at 10:1 and timing being locked out at 20 degrees has to be our biggest limiting factors. We are also interested in messing with the shift points and trying to lower the line pressures (another idea we got from Billy). The test and tune at Terre Haute yields our quickest 1/8 mile passes to date (10.40 compared to prior 10.60s) so we are now convinced that we are under the index on the 1/4 mile.

St. Louis double divisional is the official debut of the car with the tuneable ECM and it does not disappoint. Based on our 1/8 mile data and some tune changes we have queued up, we believe the car should be around a 15.99 if everything carries down track like we think it should. Our initial run with the baseline tune ends up with a 16.21 at 84 MPH. A full 3 tenth improvement from the prior 16.51 best! We are now under the index. We load up the tune changes that we believe will pick the car up another couple tenths and we wait for 2nd qualifier to try and get in the show. The weather, however, had other ideas and we ended up outside the show and with an untested tune for race 2.

Luckily, several cars left between races and we only have to out-qualify a couple of cars (which we didn't know when qualifying started). We leave the new tune in the car and we put the "class oil" (FL0) in the car to ensure that we should be far enough under to beat a few cars. The wind has changed to a head wind which slows the Ranger down 8 hundredths on this run, but the Cobalt goes out and runs 16.02!!! The changes in tune and the "class oil" combined picked us up almost another 2 tenths. We are now .475 under the index in the same weekend we made our first under the index pass at all.

The ECM was $900, tires were $300 plus shipping, other miscellaneous parts and pieces and tax from the rest of the year all add up to a total of $1,800 spent to get the car from completely street to around .5 under. Obviously, if we could have gotten the ECM sooner we could have saved some of the smaller tests and saved a little money along the way. I'd estimate the extra savings would have been in the $100-200 range but we wanted to get the car under the index however we could while we were waiting on the ECM.

There is still 1 more race on our schedule after St. Louis and plenty more to update on the build over the winter.

MR DERBY CITY · 10-24-2023, 02:29 PM

That’s a good lookin car. I have been following this build closely and even drove to Bowling Green,Ky to watch it run on a warm Saturday afternoon. Now that it runs 5 tenths under I think you guys should pony up and spend a few hundred on a custom fender cover ..

Larry Hill · 10-24-2023, 05:23 PM

Now that is almost a sales pitch you can’t ignore.

Ellis V Buth · 10-25-2023, 10:39 AM

Quote:

Originally Posted by MR DERBY CITY

That’s a good lookin car. I have been following this build closely and even drove to Bowling Green,Ky to watch it run on a warm Saturday afternoon. Now that it runs 5 tenths under I think you guys should pony up and spend a few hundred on a custom fender cover ..

She ain't too pretty just yet. It was a good looking single-color car before I backed into it a few years ago in the driveway with my F250. That's why the hood and bumper cover are different colored than the rest of the car.

MJ, I'll probably be reaching out sometime over the winter to take you up on this.

MR DERBY CITY · 10-25-2023, 12:13 PM

Quote:

Originally Posted by Ellis V Buth

MJ, I'll probably be reaching out sometime over the winter to take you up on this.

There you go Larry

502-693-173five.

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.

10-24-2023, 01:05 PM	#3
Ellis V Buth Junior Member Join Date: Sep 2015 Posts: 83 Likes: 44 Liked 291 Times in 56 Posts	Re: Slobalt This post will catch us up to before the Fall Classic. After Columbus, we tested multiple things and tried many different theories. We procured a set of NOS 7x19.5 slicks that are a bit softer than the road race/circle track tires we had. We read Billy Nees build thread on the Cavalier and tried some of the tricks he tried (flopping the cams specifically) but our results for all of these tests yielded a series of runs between 16.53 and 16.51 in the morning air at each track (Indy, BG, testing at various bracket events and Wild Wednesday). A few of our tests (smaller injectors to try and help the 10:1 AFR with the stock tune while waiting on the new computer to arrive) resulted in significantly slower runs. We even tried tricking the car into thinking it was running at a different temperature to try and get the AFR back in line and resulted in significantly slower runs! We were able to procure an 05 Cavalier computer and wiring harness which will allow us to tune the car. Getting away from the stock computer and moving to a tuneable ECM ended up being the proper solution. We found a company in Michigan that had all the equipment and it came pre-loaded with their "drag race tune" and we took it to the 1/8 mile track in Terre Haute. The AFR and timing curve are specifically what interests us initially...AFR being pegged at 10:1 and timing being locked out at 20 degrees has to be our biggest limiting factors. We are also interested in messing with the shift points and trying to lower the line pressures (another idea we got from Billy). The test and tune at Terre Haute yields our quickest 1/8 mile passes to date (10.40 compared to prior 10.60s) so we are now convinced that we are under the index on the 1/4 mile. St. Louis double divisional is the official debut of the car with the tuneable ECM and it does not disappoint. Based on our 1/8 mile data and some tune changes we have queued up, we believe the car should be around a 15.99 if everything carries down track like we think it should. Our initial run with the baseline tune ends up with a 16.21 at 84 MPH. A full 3 tenth improvement from the prior 16.51 best! We are now under the index. We load up the tune changes that we believe will pick the car up another couple tenths and we wait for 2nd qualifier to try and get in the show. The weather, however, had other ideas and we ended up outside the show and with an untested tune for race 2. Luckily, several cars left between races and we only have to out-qualify a couple of cars (which we didn't know when qualifying started). We leave the new tune in the car and we put the "class oil" (FL0) in the car to ensure that we should be far enough under to beat a few cars. The wind has changed to a head wind which slows the Ranger down 8 hundredths on this run, but the Cobalt goes out and runs 16.02!!! The changes in tune and the "class oil" combined picked us up almost another 2 tenths. We are now .475 under the index in the same weekend we made our first under the index pass at all. The ECM was $900, tires were $300 plus shipping, other miscellaneous parts and pieces and tax from the rest of the year all add up to a total of $1,800 spent to get the car from completely street to around .5 under. Obviously, if we could have gotten the ECM sooner we could have saved some of the smaller tests and saved a little money along the way. I'd estimate the extra savings would have been in the $100-200 range but we wanted to get the car under the index however we could while we were waiting on the ECM. There is still 1 more race on our schedule after St. Louis and plenty more to update on the build over the winter.

10-24-2023, 02:29 PM	#4
MR DERBY CITY VIP Member Join Date: Feb 2014 Location: Derby City, USA Posts: 3,344 Likes: 876 Liked 6,702 Times in 1,300 Posts	Re: Slobalt That’s a good lookin car. I have been following this build closely and even drove to Bowling Green,Ky to watch it run on a warm Saturday afternoon. Now that it runs 5 tenths under I think you guys should pony up and spend a few hundred on a custom fender cover ..

10-24-2023, 05:23 PM	#5
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,303 Likes: 1,659 Liked 9,534 Times in 1,977 Posts	Re: Slobalt Now that is almost a sales pitch you can’t ignore. __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

10-27-2023, 01:22 PM	#8
Charles Stewart Member Join Date: Jul 2016 Location: Rivière-du-Loup, (QC) Canada Posts: 286 Likes: 1,190 Liked 508 Times in 151 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.