Ok To Settle The Svo Injector Ratings
Originally Posted by slow
XL3V-A5A
0 280 150 558
These are the part numbers on the green tops I have in front of me.
http://users.erols.com/srweiss/tableifc.htm
That is a site that shows lots of injector info.
Ryan
0 280 150 558
These are the part numbers on the green tops I have in front of me.
http://users.erols.com/srweiss/tableifc.htm
That is a site that shows lots of injector info.
Ryan
that link shows them at 40# @ 43.5psi , if im reading it right.
so is it 41.47 @ 40psi or something different?
Has eveybody been going with the 41.47 @ 40psi?
thanks
TECH Senior Member
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
Originally Posted by RedHardSupra
stop scaling injectors! just calculate them, it's actually easier. what do old injectors have in common with the new ones? nothing, they're different injectors!
Originally Posted by Black02SS
I actually agree with RedHardSupra. Just calculate them and be done. No need to scale them.
Originally Posted by WS6FirebirdTA00
no calculate them as in put a few number in the spread sheet and be done with it.
scaling using a constant multiplier is incorrect since flow rate is not linearly proportional to pressure (it goes as the square root);
it's correct (and easy enough) to calculate using the spreadsheet.
11 Second Club
Joined: Jul 2004
Posts: 123
Likes: 1
From: Sydney, Australia
Now what about SVO 30 offsets for voltage change???
This is a big factor in all of this.
I have found Chris Bs spreadsheet for SVO 30s on the the LS1 Edit Faq website
Its based on the Ford offsets
At the Voltages 6, 8, 10, 11, 12, 13 ,14, 15 ,16 and at O pressure
4.6475
2.1182
1.3965
1.1973
1.0313
0.9033
0.7861
0.7148
0.7148
How much can we trust these values??
I have a spreadsheet of numbers i can try.
e.g. at 13.0V it is
0.899079
0.99541
1.091739
1.12385
1.155959
1.18807
1.18807
1.18807
1.220179
1.220179
1.220179
1.25229
1.284398
1.284398
1.316509
1.316509
1.316509
This is a big factor in all of this.
I have found Chris Bs spreadsheet for SVO 30s on the the LS1 Edit Faq website
Its based on the Ford offsets
At the Voltages 6, 8, 10, 11, 12, 13 ,14, 15 ,16 and at O pressure
4.6475
2.1182
1.3965
1.1973
1.0313
0.9033
0.7861
0.7148
0.7148
How much can we trust these values??
I have a spreadsheet of numbers i can try.
e.g. at 13.0V it is
0.899079
0.99541
1.091739
1.12385
1.155959
1.18807
1.18807
1.18807
1.220179
1.220179
1.220179
1.25229
1.284398
1.284398
1.316509
1.316509
1.316509
Originally Posted by WS6FirebirdTA00
last time i asked this we could not go by the ford offsets, something about the drivers being different
does anybody know if there is a sure way to tune the Injector pulse widtch?
pulse width or offset?
there is a spread sheet from bosch with part numbers and all to find the real rating of all the injectors, the flow rate of them. as for the offset that is another story
there is a spread sheet from bosch with part numbers and all to find the real rating of all the injectors, the flow rate of them. as for the offset that is another story
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Originally Posted by WS6FirebirdTA00
pulse width or offset?
there is a spread sheet from bosch with part numbers and all to find the real rating of all the injectors, the flow rate of them. as for the offset that is another story
there is a spread sheet from bosch with part numbers and all to find the real rating of all the injectors, the flow rate of them. as for the offset that is another story
My real question is, what other tables need to be tuned besides IFR table after going to bigger injectors
11 Second Club
Joined: Jul 2004
Posts: 123
Likes: 1
From: Sydney, Australia
I have tidied up a set of values for Offset between 11.5V and 14.5V
This is going from the stock offset voltage and millisecond values
to ones for an SVO injector.
Here they are
11.5-12.0-12.5-13.0-13.5-14.0-14.5
0.926358 0.861813 0.802884 0.749232 0.700744 0.65773 0.621406
0.94778 0.881742 0.821451 0.766558 0.716949 0.67294 0.635776
0.969202 0.901672 0.840017 0.783884 0.733153 0.68815 0.650146
0.990624 0.921601 0.858584 0.80121 0.749358 0.70336 0.664516
1.012046 0.941531 0.877151 0.818536 0.765563 0.71857 0.678886
1.033468 0.96146 0.895717 0.835862 0.781767 0.73378 0.693256
1.05489 0.98139 0.914284 0.853188 0.797972 0.74899 0.707626
1.076312 1.001319 0.932851 0.870514 0.814177 0.7642 0.721996
1.097734 1.021249 0.951418 0.88784 0.830382 0.77941 0.736366
1.119156 1.041178 0.969984 0.905166 0.846586 0.79462 0.750736
1.140578 1.061107 0.988551 0.922492 0.862791 0.80983 0.765106
1.162 1.081037 1.007118 0.939818 0.878996 0.82504 0.779476
1.183422 1.100966 1.025684 0.957144 0.8952 0.84025 0.793846
1.204844 1.120896 1.044251 0.97447 0.911405 0.85546 0.808216
1.226266 1.140825 1.062818 0.991796 0.92761 0.87067 0.822586
1.247688 1.160755 1.081384 1.009122 0.943814 0.88588 0.836956
1.26911 1.180684 1.099951 1.026448 0.960019 0.90109 0.851326
Others have used similar numbers.
Does anyone know what the risk is in trying them - if they arent suitable what will it do to try and see???
This is going from the stock offset voltage and millisecond values
to ones for an SVO injector.
Here they are
11.5-12.0-12.5-13.0-13.5-14.0-14.5
0.926358 0.861813 0.802884 0.749232 0.700744 0.65773 0.621406
0.94778 0.881742 0.821451 0.766558 0.716949 0.67294 0.635776
0.969202 0.901672 0.840017 0.783884 0.733153 0.68815 0.650146
0.990624 0.921601 0.858584 0.80121 0.749358 0.70336 0.664516
1.012046 0.941531 0.877151 0.818536 0.765563 0.71857 0.678886
1.033468 0.96146 0.895717 0.835862 0.781767 0.73378 0.693256
1.05489 0.98139 0.914284 0.853188 0.797972 0.74899 0.707626
1.076312 1.001319 0.932851 0.870514 0.814177 0.7642 0.721996
1.097734 1.021249 0.951418 0.88784 0.830382 0.77941 0.736366
1.119156 1.041178 0.969984 0.905166 0.846586 0.79462 0.750736
1.140578 1.061107 0.988551 0.922492 0.862791 0.80983 0.765106
1.162 1.081037 1.007118 0.939818 0.878996 0.82504 0.779476
1.183422 1.100966 1.025684 0.957144 0.8952 0.84025 0.793846
1.204844 1.120896 1.044251 0.97447 0.911405 0.85546 0.808216
1.226266 1.140825 1.062818 0.991796 0.92761 0.87067 0.822586
1.247688 1.160755 1.081384 1.009122 0.943814 0.88588 0.836956
1.26911 1.180684 1.099951 1.026448 0.960019 0.90109 0.851326
Others have used similar numbers.
Does anyone know what the risk is in trying them - if they arent suitable what will it do to try and see???
Let me ask this. If the numbers I used last year are good ( from the spreadsheet ) and the tuner was very able to tune it, is there any need to change the voltages if it's running well?
Or is this just for folks who are starting out and would then know they have the right values from the start to start tuning with.
Think I answered my own question but curious on thoughts....
Or is this just for folks who are starting out and would then know they have the right values from the start to start tuning with.
Think I answered my own question but curious on thoughts....
u can tune it on the stock table, but if your voltage drops (say from adding pulleys) or something along those lines, being in a different voltage on the table may cause the fueling to be off. im not really worried about mine just curious about a good way to make the table.
11 Second Club
Joined: Jul 2004
Posts: 123
Likes: 1
From: Sydney, Australia
I have tried the above numbers and it didnt help - so its now back at close to the stock set of offset numbers.
BUT i did confirm something valuable for everyone.
On the dyno the other day had the dynologs computer hooked to my injectors and the duty cycle values matched precisely the ones i was logging in efilive. The afrs also matched my wideband values etc. I am using the injector flow rates that are set for them being 30 at 40psi - so i think this confirms they are right?
BUT i did confirm something valuable for everyone.
On the dyno the other day had the dynologs computer hooked to my injectors and the duty cycle values matched precisely the ones i was logging in efilive. The afrs also matched my wideband values etc. I am using the injector flow rates that are set for them being 30 at 40psi - so i think this confirms they are right?
how can you log duty cycle on the dyno, if it is just 2 wires measuring the on time of the injector, it will always match the data in the computer, since time is the constant that is being referenced. Right?.
Ryan
Ryan
11 Second Club
Joined: Jul 2004
Posts: 123
Likes: 1
From: Sydney, Australia
I am not sure about the validity either??
But the dynolog computer was able to pick up duty cycle and rpm from wires on the injector.
We later also had an inline fuel meter which logged fuel in Litres/minute
Here is some data
At 6092rpm 253rwkw unlocked
Road speed 189kph
2.14 Litres/min at 50.8Hz InjF and IPW 15.1ms
AFR 12.30
Fuel Pressure PSI 58.9
Duty cycle was 76.9%
Interestingly 4.1mpg
>>>
My flow rates at WOT are 4.554688 g/s
and 4.578125 g/s at 0 and 5 Kpa manifold pressure
so that is 273g/min which is 363.5ml/min x 8 = 2.908 litres/min at 100% DC
at 76.9% DC this comes to 2.236 L/min
This figure actually supports the idea that the injectors are 34.5Lb so rated at 43.5psi.
So within one message i show a contradiction.
Can someone else confirm my figures???
But the dynolog computer was able to pick up duty cycle and rpm from wires on the injector.
We later also had an inline fuel meter which logged fuel in Litres/minute
Here is some data
At 6092rpm 253rwkw unlocked
Road speed 189kph
2.14 Litres/min at 50.8Hz InjF and IPW 15.1ms
AFR 12.30
Fuel Pressure PSI 58.9
Duty cycle was 76.9%
Interestingly 4.1mpg
>>>
My flow rates at WOT are 4.554688 g/s
and 4.578125 g/s at 0 and 5 Kpa manifold pressure
so that is 273g/min which is 363.5ml/min x 8 = 2.908 litres/min at 100% DC
at 76.9% DC this comes to 2.236 L/min
This figure actually supports the idea that the injectors are 34.5Lb so rated at 43.5psi.
So within one message i show a contradiction.
Can someone else confirm my figures???
11 Second Club
Joined: Jul 2004
Posts: 123
Likes: 1
From: Sydney, Australia
So the tune says it should be getting 2.236L/min of fuel out of the injectors when given the IFR values suited to the injectors being rated at 40psi
BUT my car is only getting 2.14L/min of fuel.
BUT my car is only getting 2.14L/min of fuel.
oztrack,
what was your dynamic airflow or MAF reading at that rpm point?
i think the variation is small enough to chaulk it up to measuring errors.
read http://redhardsupra.blogspot.com/200...ctors-are.html
and you'll find out how small differences quickly accumulate
what was your dynamic airflow or MAF reading at that rpm point?
i think the variation is small enough to chaulk it up to measuring errors.
read http://redhardsupra.blogspot.com/200...ctors-are.html
and you'll find out how small differences quickly accumulate