#60 injector question
#26
Senior Member
Join Date: 02-17-06
Location: Louisville, KY
Posts: 1,517
Likes: 0
Received 0 Likes
on
0 Posts
To me, a small pulley is in th 2.5-2.7 range and I agree, 60's are needed. For a daily driver that rarely see's anything over 4000 rpm, you SHOULD, and i mean SHOULD, be able to run 42's on a ring as low as 2.8 and not have any issues. Obviously if you beat on it all the time, it will break regardless of what combo you are running with. 2 of the 3 of my "idiot" friends were running 60's, both dyno tuned and data logged for a few weeks.
What size pulley?
What size pulley?
Last edited by NVMYCOBALTSS; 01-18-2009 at 12:24 AM. Reason: Automerged Doublepost
#27
Is it possible to use 42lbers and a 2.8inch pulley? Yes.
Is it smart? No.
Should anyone recommend it? No.
How about on a daily driver? No!
It's just stupid to run your injectors static. Even on a daily driver, it's still stupid. Why would you want to do it? Why, its illogical to want to push you injectors to the breaking point.
Granted if you NEVER push you motor to higher rpm's it doesnt matter if you use 42lbers with a 2.5inch pulley. But if you are going to see higher rpm's you should do so knowing that your car can handle it.
Your friends must have either again had a bad tuner, or didn't have cooling mods. Cobalts that are tuned properly and have cooling mods will last. You call your friends the idiot, but yet you are doing the same thing to your car?
Why do you think your friends cars broke?
Is it smart? No.
Should anyone recommend it? No.
How about on a daily driver? No!
It's just stupid to run your injectors static. Even on a daily driver, it's still stupid. Why would you want to do it? Why, its illogical to want to push you injectors to the breaking point.
Granted if you NEVER push you motor to higher rpm's it doesnt matter if you use 42lbers with a 2.5inch pulley. But if you are going to see higher rpm's you should do so knowing that your car can handle it.
Your friends must have either again had a bad tuner, or didn't have cooling mods. Cobalts that are tuned properly and have cooling mods will last. You call your friends the idiot, but yet you are doing the same thing to your car?
Why do you think your friends cars broke?
Last edited by Zach06CobaltSC; 01-18-2009 at 12:30 AM. Reason: Automerged Doublepost
#30
Senior Member
Join Date: 02-17-06
Location: Louisville, KY
Posts: 1,517
Likes: 0
Received 0 Likes
on
0 Posts
Your friends must have either again had a bad tuner, or didn't have cooling mods. Cobalts that are tuned properly and have cooling mods will last. You call your friends the idiot, but yet you are doing the same thing to your car?
Why do you think your friends cars broke?
Originally Posted by Zach06CobaltSC
Redefined1 - Don't listen to NVMYCOBALTSS as he obviously doesn't know what he is talking about. It's very possible that his friends blew up there cars as they are idiots, but I can tell you that it was not solely the pulleys fault.
Originally Posted by Zach06CobaltSC
You call your friends the idiot, but yet you are doing the same thing to your car?
Originally Posted by NVMYCOBALTSS
Obviously if you beat on it all the time, it will break regardless of what combo you are running with. 2 of the 3 of my "idiot" friends were running 60's, both dyno tuned and data logged for a few weeks.
#32
Senior Member
Join Date: 02-17-06
Location: Louisville, KY
Posts: 1,517
Likes: 0
Received 0 Likes
on
0 Posts
Street racing on the weekends was the sole purpose of the two that blew up. Spend the week in the garage, come out on the weekend and hammered all weekend.
All the way to redline in most cases...
All the way to redline in most cases...
Last edited by NVMYCOBALTSS; 01-18-2009 at 12:49 AM. Reason: Automerged Doublepost
#33
Sucks for them. I know of a lot of cobalts that take massive amounts of abuse though and handle it quite well. If you build your car correctly and tune it right, take care and maintain it, it will last. Cars can handle the occasional abuse if built correctly. I consider occasional as once or twice a week, such as a "weekend warrior".
Redline is defined by the tuner so that doesn't tell us much. If they were taking it over 7500 rpm's often without a built valve train that would explain a lot.
Redline is defined by the tuner so that doesn't tell us much. If they were taking it over 7500 rpm's often without a built valve train that would explain a lot.
#34
Senior Member
Join Date: 02-17-06
Location: Louisville, KY
Posts: 1,517
Likes: 0
Received 0 Likes
on
0 Posts
They were both set at 7200, Of the people with 60's and 2.6, one had piston issues, the other is believed to have been a head gasket.
I searched on HPT forums and found this nifty little line... Take it for what it is worth.
SO, back to my original statement, you can run 42's if you want to. I will revise my earlier statement to running them with the ring that you and your tuner are comfortable with.
I would still like to see the IDC logs when you get them up....
I searched on HPT forums and found this nifty little line... Take it for what it is worth.
Originally Posted by hpt forums
for a street car running 100% IDC will not break anything, a street car runs about 99% of the time in part throttle
I would still like to see the IDC logs when you get them up....
#39
Senior Member
iTrader: (1)
Join Date: 01-23-06
Location: on here
Posts: 10,731
Likes: 0
Received 0 Likes
on
0 Posts
Yes the car starts to lean out if the injectors can not keep up. It also starts to break up up top as it can not sustain the amount of advance anymore either. Hence the 6* of knock you see at at the top of the gear.
#43
Senior Member
Join Date: 12-09-07
Location: San Antonio, TX
Posts: 8,966
Likes: 0
Received 0 Likes
on
0 Posts
ah i cant wait to get my 2.8 with 60s stage 2 belt and probably the ott ecu tuned with my mods . included to that my h.e installed then later on the dual pass and meth
#44
Senior Member
Join Date: 02-17-06
Location: Louisville, KY
Posts: 1,517
Likes: 0
Received 0 Likes
on
0 Posts
So, question LSJ, Just to make sure that I am reading that right, the MAX RPM was 6984. MAX IDC was 115% on a stage 2 flash with the stage 2 hardware?
I am just trying to understand the mechanics behind the graph and the details associated with it.
Thanks for posting up the graph.
I am just trying to understand the mechanics behind the graph and the details associated with it.
Thanks for posting up the graph.
#45
Senior Member
iTrader: (1)
Join Date: 01-23-06
Location: on here
Posts: 10,731
Likes: 0
Received 0 Likes
on
0 Posts
Yes 6894 rpms all stage 2, i believe this user had an intake as well. If you look at the log though you will see that by 6k rpms its already pver 100% duty cycle. After 80% you are along for the the ride.
Thread
Thread Starter
Forum
Replies
Last Post