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ECM for 60lb. injectors???

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Old 03-19-2008, 08:39 PM
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Default ECM for 60lb. injectors???

I wsa planning on running the gt67r turbo with my sts but my mechanic tells me I need a different ECM to run 60lb. injectors. My car being a 1998 have anything to do with it?
Old 03-19-2008, 08:41 PM
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Tuning wise He might not like the 98 pcm but as far as being compatable the high impedance 60# will work with the stock computer
Old 03-19-2008, 09:18 PM
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60's will work fine. Your 98 PCM just dosn't have all the parameter's as the newer model's do. It maybe a little harder for the tuner,depending on his abilitie's.
Old 03-19-2008, 10:31 PM
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Stock ECM/PCM's go up to 79lbs I do believe.
Old 03-19-2008, 11:05 PM
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Originally Posted by TransAmcoupe98
I wsa planning on running the gt67r turbo with my sts but my mechanic tells me I need a different ECM to run 60lb. injectors. My car being a 1998 have anything to do with it?
your mechanic is wrong. the ls1 pcms can handle plenty of power and injectors. its all about what interface the injectors are using and whether they are high or low impedence for our cars you want HIGH IMPEDANCE injectors

check out my sts build. I still have the 60mm (60-1)

YOU WILL NOT NEED 60# injectors, they are too much for what you are wanting.

grab you some 42# or some 50# injectors....

I'm running 5psi, making 423HP 431TQ (NO INTERCOOLER) and only running my injectors at 67% duty cycle..and they can go to 85% easily even 90%

if you want all the injector calculator stuff let me know, I have an excel sheet that shows you it all
Old 03-20-2008, 08:28 AM
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Yep, 60's will work fine....that's what I'm running. As far as tuning, the VE tables are easier to manipulate on the 01-02 cars. You can rewrite the 01-02 operating system on the 98 PCM. Did that with a 00 car I tuned for a friend using HP Tuners. Worked great
Old 03-20-2008, 09:38 AM
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Originally Posted by Schantin
Yep, 60's will work fine....that's what I'm running. As far as tuning, the VE tables are easier to manipulate on the 01-02 cars. You can rewrite the 01-02 operating system on the 98 PCM. Did that with a 00 car I tuned for a friend using HP Tuners. Worked great
No you CANNOT flash a 01-02 OS into a 1998 PCM or you WILL KILL IT and it requires unsoldering the flash chip to try to recover it. You can flash a 01-02 into a 99-00 car like you did.

Only a 98 non segmented flash file, can be written to a 98 pcm.

Ryan
Old 03-20-2008, 01:12 PM
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Originally Posted by slow
No you CANNOT flash a 01-02 OS into a 1998 PCM or you WILL KILL IT and it requires unsoldering the flash chip to try to recover it. You can flash a 01-02 into a 99-00 car like you did.

Only a 98 non segmented flash file, can be written to a 98 pcm.

Ryan
Thanks for clearing that up. I didn't realize the 98 used a different PCM than the other year LS1's. My bad.....
Old 03-20-2008, 05:39 PM
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i got 60's on my 98 with no issues.

Chris
Old 03-20-2008, 06:03 PM
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Originally Posted by slow
No you CANNOT flash a 01-02 OS into a 1998 PCM or you WILL KILL IT and it requires unsoldering the flash chip to try to recover it. You can flash a 01-02 into a 99-00 car like you did.

Only a 98 non segmented flash file, can be written to a 98 pcm.

Ryan
You are absolutely right, 98's are the stepchild.......
Old 03-20-2008, 06:13 PM
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We use 60's in all the years without any problems. Bob
Old 03-21-2008, 11:02 AM
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I'm going to run 60# injectors on my '98 PCM and I know I'm not going to have any issues there
Old 03-21-2008, 05:05 PM
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60's can be a pain to tune in a 98 car but it can be done.I prefer to just do a generic OLSD tune on them,runs alot better.
Old 03-21-2008, 05:20 PM
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Yeah, mine will be a 2-bar SD tune.
Old 03-21-2008, 08:51 PM
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I run 60's in my 98. No problems at all.
Old 06-25-2008, 12:10 AM
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You guys that are running larger injectors with no issues...what have you done to achieve this? Did you just throw the injectors in and go without tweaking the ECU? I'm installing an STS kit with T67 at 5 psi and was either going to go with 42 or 60 lb injectors. Current fuel pump is a Walbro GSS342. Will the car idle fine and run fine when not in boost if either injectors are simply installed without tuning? I have EFILive V1 which I'm still learning to use and an LC-1 wideband which isn't hooked up. I've read some stuff over on the EFILive board and on this board about injector scaling. It seems that some people have installed larger injectors and done nothing else and their cars idle/run fine. Then there's others who have all sorts of issues with rich idling and such and end up having to play with IFR tables. Should I just install the 42 or 60 lb injectors along with everything else and see how they run without scaling the injectors? Or should I immediately scale the injectors using the injector flow rate calculator spreadsheet? I want my car to have a safe a/f ratio in boost but I also don't want my car to run like butt out of boost getting crappy mileage.
Old 06-25-2008, 12:25 AM
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Originally Posted by waveoff
You guys that are running larger injectors with no issues...what have you done to achieve this? Did you just throw the injectors in and go without tweaking the ECU? I'm installing an STS kit with T67 at 5 psi and was either going to go with 42 or 60 lb injectors. Current fuel pump is a Walbro GSS342. Will the car idle fine and run fine when not in boost if either injectors are simply installed without tuning? I have EFILive V1 which I'm still learning to use and an LC-1 wideband which isn't hooked up. I've read some stuff over on the EFILive board and on this board about injector scaling. It seems that some people have installed larger injectors and done nothing else and their cars idle/run fine. Then there's others who have all sorts of issues with rich idling and such and end up having to play with IFR tables. Should I just install the 42 or 60 lb injectors along with everything else and see how they run without scaling the injectors? Or should I immediately scale the injectors using the injector flow rate calculator spreadsheet? I want my car to have a safe a/f ratio in boost but I also don't want my car to run like butt out of boost getting crappy mileage.
You need to tune the size and pulse data for the new injectors. Do a search for threads by member RedHotSupra. He has a website w/ boatloads of tuning info, to include fuel injector spreadsheets for both HPTuners and EFI Live. You'll find the data you need there.
Old 06-30-2008, 07:02 AM
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Thanks...I've been reading his posts and stuff. Great info!



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