Question about Bosch 1000cc Injectors
Fostytou, the Bosch are made for high pressures.
If the 1000s are to small, crank the base fuel pressure.
Toss in an 044 inline with the 255 along with a high pressure requlator and you'll have a fuel system that not only flows well enough to keep up with the 1500cc these can flow, but it will atomize better then stock injectors.
Honestly, I think it's a waste to run this injectors on a lower pressure system.
If the 1000s are to small, crank the base fuel pressure.
Toss in an 044 inline with the 255 along with a high pressure requlator and you'll have a fuel system that not only flows well enough to keep up with the 1500cc these can flow, but it will atomize better then stock injectors.
Honestly, I think it's a waste to run this injectors on a lower pressure system.
At around 50-55 base PSI I would be good (for now), but now we are talking regulator (or crush mod and rail with gauge) and double pumper kit or crazy external secondary series pump I have to try to install in someone else's garage.
I cannot give enough praise for my RC 1000 cc injectors. I have had zero start up problems with them since I adjusted the latency in the lower voltage area. One poster suggested that the voltage on start up hits 7-9v and you need to adjust latency there to get rid of the hard start. Since I did that minor adjustment, my RC 1000 start with the first crank everytime even when the car is warm, hot or cold.
The trims on my car are steady at 0 to +4 on the cruise (I do not remember the idle). I have had these injectors on the car since March of 08 with zero problems. I run an AEM intake and TBE with TP on my Evo on 91 octane. IDC is at 60%. I put them on for E85, but no E85 stations have openned up close to where I live
Here are my Lat and scaling numbers:
Scaling: 835
Latency
4.512
3.36
1.632
0.912
0.6
0.36
0.288
The trims on my car are steady at 0 to +4 on the cruise (I do not remember the idle). I have had these injectors on the car since March of 08 with zero problems. I run an AEM intake and TBE with TP on my Evo on 91 octane. IDC is at 60%. I put them on for E85, but no E85 stations have openned up close to where I live
Here are my Lat and scaling numbers:
Scaling: 835
Latency
4.512
3.36
1.632
0.912
0.6
0.36
0.288
I agree with all of that, unfortunately that adds some serious cost and complexity to the system.... both of which are working against me while I try to buy a house
At around 50-55 base PSI I would be good (for now), but now we are talking regulator (or crush mod and rail with gauge) and double pumper kit or crazy external secondary series pump I have to try to install in someone else's garage.
At around 50-55 base PSI I would be good (for now), but now we are talking regulator (or crush mod and rail with gauge) and double pumper kit or crazy external secondary series pump I have to try to install in someone else's garage.
RC 1200cc working amazingly on E85! (thanks to John Bradley for the base and Razorlab for the injector recommendation)
Scaling
622
Latency
3.6
2.304
1.728
1.32
0.864
0.72
0.48
Startup IPW
399.408
115.936
41.816
13.976
11.432
8.488
4.432
1.928
1.856
With that as a base I was -4% idle and .4% mid LTFT. Scaled the 25hz down to 139 and 50hz down to 151 (right around 4% less). I originally scaled the 19hz down, but set it back because it made startup worse and was not affecting idle.
Car runs amazing. Startup has been flawless and takes less than 1 crank down to 25*F (the temps have been between that and 70 here lately). My low speed bucking is also gone, for now at least... we'll see if that changes with the weather. I'm actually also getting slightly better gas milage than with the 780cc, and that has been with alot of reflashing and tuning different settings along with quite a few pulls. The last tank i ran was fully on this tune and it just keeps getting better.
Scaling
622
Latency
3.6
2.304
1.728
1.32
0.864
0.72
0.48
Startup IPW
399.408
115.936
41.816
13.976
11.432
8.488
4.432
1.928
1.856
With that as a base I was -4% idle and .4% mid LTFT. Scaled the 25hz down to 139 and 50hz down to 151 (right around 4% less). I originally scaled the 19hz down, but set it back because it made startup worse and was not affecting idle.
Car runs amazing. Startup has been flawless and takes less than 1 crank down to 25*F (the temps have been between that and 70 here lately). My low speed bucking is also gone, for now at least... we'll see if that changes with the weather. I'm actually also getting slightly better gas milage than with the 780cc, and that has been with alot of reflashing and tuning different settings along with quite a few pulls. The last tank i ran was fully on this tune and it just keeps getting better.
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From: Lafayette, IN
Tuning is done. 25psi on 93 Octane with no issues. The injectors have zero hot start issues or cold start problems. I upped scaling to 812 as the fuel trims where moving to about -5%.
Dan
Dan
I compared Rawkus' Latency numbers to what I have calculated for my ID1000 injectors. My calculated data lays right over the top of his for the most part.
Seems like you should be able to use the data on the sheet provided with the injectors to get realistic Latency values with just a simple curve fit in excel.
I thought somebody mentioned these injector when flowed with gasoline actually flow closer to 840cc injectors? Interestingly, if you use 31050 in the injector scaling inplace of 29241 (this was mentioned in another thread) they calculate out to 840cc based on Rawkus' 790 number.
Seems like you should be able to use the data on the sheet provided with the injectors to get realistic Latency values with just a simple curve fit in excel.
I thought somebody mentioned these injector when flowed with gasoline actually flow closer to 840cc injectors? Interestingly, if you use 31050 in the injector scaling inplace of 29241 (this was mentioned in another thread) they calculate out to 840cc based on Rawkus' 790 number.
Last edited by 03whitegsr; Aug 30, 2009 at 11:54 AM.
I was having weird startup issues with these injectors only on warm starts. I thought it was the injectors but recently I have switched to SD and the problem is gone! Car starts perfect all the time, which leads me to believe it was a MAF issue. Others were having the exact same issue with these injectors. I guess they are so good they cause the other problems to show their ugly heads.
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From: Lafayette, IN
I compared Rawkus' Latency numbers to what I have calculated for my ID1000 injectors. My calculated data lays right over the top of his for the most part.
Seems like you should be able to use the data on the sheet provided with the injectors to get realistic Latency values with just a simple curve fit in excel.
I thought somebody mentioned these injector when flowed with gasoline actually flow closer to 840cc injectors? Interestingly, if you use 31050 in the injector scaling inplace of 29241 (this was mentioned in another thread) they calculate out to 840cc based on Rawkus' 790 number.
Seems like you should be able to use the data on the sheet provided with the injectors to get realistic Latency values with just a simple curve fit in excel.
I thought somebody mentioned these injector when flowed with gasoline actually flow closer to 840cc injectors? Interestingly, if you use 31050 in the injector scaling inplace of 29241 (this was mentioned in another thread) they calculate out to 840cc based on Rawkus' 790 number.
For an update I am now scaled at 812. Everything is still running fine.
Dan
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From: Lafayette, IN
Thread Starter
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From: Lafayette, IN
BTW, I have run two track events recently, (Gingerman in Michigan and Englishtown in New Jersey) and the car performed flawlessly for both days with zero fueling issues.
Dan
Dan
I don't know how you can start the car on stock IPW settings. I think something is weird between the IPW table and the MAF Hz switch-over upon starting. Something little on the MAF airflow (like a disturbance) may cause the issue upon startup for some cars, for others it may be times just right. The SD would of course get rid of it because you get rid of the maf you get rid of the disturbance.
Somebody having trouble upon startup log engine speed, battery, and MAF Hz and post a "bad start". I'll compare it to one of my good starts to see if we are onto something.
Also I'm going to swap MAF sensors with my friends car to see if the problem follows the MAF.
Somebody having trouble upon startup log engine speed, battery, and MAF Hz and post a "bad start". I'll compare it to one of my good starts to see if we are onto something.
Also I'm going to swap MAF sensors with my friends car to see if the problem follows the MAF.
I was having weird startup issues with these injectors only on warm starts. I thought it was the injectors but recently I have switched to SD and the problem is gone! Car starts perfect all the time, which leads me to believe it was a MAF issue. Others were having the exact same issue with these injectors. I guess they are so good they cause the other problems to show their ugly heads.