427 Dart LSn / Twin76s / OGG / 1300rwhp Build!
11-09-2015, 07:55 AM
#442
Managed to to pull off a new best this last weekend despite all the setbacks!
Car was really lazy, we had a lazy tuneup in the boost controller, and only 14 degrees of timing. The car left really slow, but seemed to do ok on the backhalf.
Car was really lazy, we had a lazy tuneup in the boost controller, and only 14 degrees of timing. The car left really slow, but seemed to do ok on the backhalf.
11-18-2015, 05:39 AM
#446
Just read this start to finish, great read, great documentation and pictures. What was the decision to go with the lsnext block over an LSx GM block? In college I did an ANSYS finite element analysis of the LSx block at 4.25" bore and 4.5" stroke 511 ci (whatever the max was, it's been a while) and kept turning up the boost and couldn't get more wall deformation than a Darton sleeved LS that ERL did a finite element analysis on that was acceptable. The LSx block used 15% stronger iron than typical iron GM blocks, but this was 7 years ago and I know the game has changed a lot. Below is a link to ERL's analysis, I never got mine back from my professor, no idea why, but it boosted my grade from a B- to a B+ final so I don't know if I did mine right or not, and all my virus ridden **** trashed my laptop, and I haven't looked through my external hard drive if I have another copy.
http://www.erlperformance.com/wp-con...ECK-SLEEVE.pdf
If anyone reading this is in college looking for a final project, it would be cool to see a comparison of the stresses of a splayed 4 bolt lsnext vs a 6 bolt main LSx and find who fails first. Mine only analyzed the walls since at the time there was a debate of the LSx could really go to 4.25" bore with the siamesed walls.
http://www.erlperformance.com/wp-con...ECK-SLEEVE.pdf
If anyone reading this is in college looking for a final project, it would be cool to see a comparison of the stresses of a splayed 4 bolt lsnext vs a 6 bolt main LSx and find who fails first. Mine only analyzed the walls since at the time there was a debate of the LSx could really go to 4.25" bore with the siamesed walls.
Last edited by bufmatmuslepants; 11-18-2015 at 06:00 AM.
02-22-2016, 08:01 AM
#448
2016 Updates Well I haven't update this thread in awhile but some minor upgrades coming for 2016.
First and foremost decided to pull the block out and do a tear down just to see how things were looking. rotary1307cc influenced me on this and I am glad he did. As you can see from the picture #6 rod bearing was pretty much ready to give up and lost its crush. Glad the motor got pulled in time before a catastrophic failure occurred.
The motor is getting a new set of bearings, main studs, ring pack on #7, and the heads are getting inspected at BTR. Plan is to have the heads softened and new seals.
Really wanting to go to aftermarket computer this year but just can't yet swing the extra coin I decided to pick up a Davis Bump box used for a smoking deal. Hopefully I can learn how to race the car and do some events now without having to worry about making boost on a .400 pro tree.
I got sick and tired of dealing with the polished intake and charge pipe so I decided to have them coated. After talking with Race Coatings in Forrest Lake,Mn we decided on a black ceramic. I really like the way it turned out, and should look really good under the hood!
Other small items for winter include, back pressure sensor, pre-iat sensor, and pre-boost map sensor. I am going to stick with the factory ecu this year and try to make a run at a 7.99 et. Its a lofty goal, but a lofty goal is better than no goal!
First and foremost decided to pull the block out and do a tear down just to see how things were looking. rotary1307cc influenced me on this and I am glad he did. As you can see from the picture #6 rod bearing was pretty much ready to give up and lost its crush. Glad the motor got pulled in time before a catastrophic failure occurred.
The motor is getting a new set of bearings, main studs, ring pack on #7, and the heads are getting inspected at BTR. Plan is to have the heads softened and new seals.
Really wanting to go to aftermarket computer this year but just can't yet swing the extra coin I decided to pick up a Davis Bump box used for a smoking deal. Hopefully I can learn how to race the car and do some events now without having to worry about making boost on a .400 pro tree.
I got sick and tired of dealing with the polished intake and charge pipe so I decided to have them coated. After talking with Race Coatings in Forrest Lake,Mn we decided on a black ceramic. I really like the way it turned out, and should look really good under the hood!
Other small items for winter include, back pressure sensor, pre-iat sensor, and pre-boost map sensor. I am going to stick with the factory ecu this year and try to make a run at a 7.99 et. Its a lofty goal, but a lofty goal is better than no goal!
02-22-2016, 09:36 PM
#449
TECH Fanatic
On that note-what is the fastest anyone has gone on a factory ECU?
02-27-2016, 07:31 PM
#451
Staging Lane
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Looking through your build, amazing BTW! Just curious your fuel system to support this kind of horsepower. What fuel pump/pumps are you running? I'm reaserching and there are mixed opinions to support 1500 hp and your definitly doing it. Care to share please?
03-29-2017, 11:12 AM
#454
Haven't bumped this in a very long time! 2016 summer was another year of broken transmissions and disappointment. Broke the k-member, fought an issue with the car breaking up all summer, 2.10 TSI gear set exploded in the 80e. Didn't go any faster than the previous year.
So for 2017 I decided i was done with the 80e and bought a BTE shorty glide that will be paired with a GV unit.
I got talked into a switching out the ecu , and will be running ms3pro with some extra goodies as well.
Pulled the motor down again this winter as well as it was smoking pretty good towards end of fall. Found slightly lifted ringland on #7 again. #4 main bearing showed the same wear as the previous year tear down. At that point it was decided to do custom crank , pistons, and pairing those with a set of callies ulta i-beams.
Also pulled a part the comp trunions and found those are worn out. Will be switching the CHE kit with ARP rocker studs
Getting closer to getting all the parts gathered up. Hopefully like to have it ready late summer early fall.
So for 2017 I decided i was done with the 80e and bought a BTE shorty glide that will be paired with a GV unit.
I got talked into a switching out the ecu , and will be running ms3pro with some extra goodies as well.
Pulled the motor down again this winter as well as it was smoking pretty good towards end of fall. Found slightly lifted ringland on #7 again. #4 main bearing showed the same wear as the previous year tear down. At that point it was decided to do custom crank , pistons, and pairing those with a set of callies ulta i-beams.
Also pulled a part the comp trunions and found those are worn out. Will be switching the CHE kit with ARP rocker studs
Getting closer to getting all the parts gathered up. Hopefully like to have it ready late summer early fall.
