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Dale
Fuel Injector Sizing
- Dale M.
- Posts: 1673
- Joined: Mon Oct 05, 2009 8:09 am
Re: Fuel Injector Sizing
"Fear The Government That Wants To Take Your Guns" - Thomas Jefferson
1970 "Kellison Sand Piper Roadster"
1970 "Kellison Sand Piper Roadster"
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- Joined: Thu Sep 04, 2003 4:00 am
Re: Fuel Injector Sizing
Hi all, thanks for the input. I've ordered a set of Siemens 630cc injectors as there seems to be some great reviews and the fact they are not massively oversized for my application. Hopefully I won't be needing to upgrade them again.
Now to finish the rest of the car and get it remapped
Now to finish the rest of the car and get it remapped
- supaninja
- Posts: 1658
- Joined: Tue Sep 14, 2010 12:48 pm
Re: Fuel Injector Sizing
Turbo_Rich wrote:Hi all, thanks for the input. I've ordered a set of Siemens 630cc injectors as there seems to be some great reviews and the fact they are not massively oversized for my application. Hopefully I won't be needing to upgrade them again.
Now to finish the rest of the car and get it remapped
I've eyeballing some 60# siemens pico injectors for my NA setup (I'm going to do e85, it's still a bit overkill ), they seem like awesome injectors and cost half what ID wants for theirs.
'65 notch w/ a squirted type 4
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'68 "Zombie Response Vehicle" Westy
viewtopic.php?f=14&t=140387
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Re: Fuel Injector Sizing
So to add a little to this thread, will These ID 1000's work on smaller engines like say a 1776t and still idle smoothly? and Does seimens make a pico injector smaller than #60 for my 1776t?
- supaninja
- Posts: 1658
- Joined: Tue Sep 14, 2010 12:48 pm
Re: Fuel Injector Sizing
That's a lot of injector for such a little engine, even if your boosting to 20psi. here is a bunch of siemen-deka injectors. http://www.bmotorsports.com/shop/index. ... miij5fvsb7 ID also has a 725cc injector.
'65 notch w/ a squirted type 4
http://supaninjanick.wordpress.com/
'68 "Zombie Response Vehicle" Westy
viewtopic.php?f=14&t=140387
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- Joined: Sat Aug 27, 2011 4:18 pm
Re: Fuel Injector Sizing
Great! I think I'm going with some 46lb DEKA's!! The price is definatley right too! Feel like sizing is about right for aroung 15psi on a 1776? yay or nay?
- supaninja
- Posts: 1658
- Joined: Tue Sep 14, 2010 12:48 pm
Re: Fuel Injector Sizing
Depends on your fuel pressure, fuel type (e85 requires about 20-25% more fuel, but turbo's love that stuff), and how high your redline is. You can try them, do a quick tune, then datalog a third gear pull to the rev limiter and see what your injector duty cycle gets too. start with low boost and work your way up to 15 lbs. Bank fire or sequential makes a difference on injector sizing too. My gut feeling is 46lbs should be perfect. The rule of thumb is IDC shouldn't exceed 85%, but there are a bunch of exceptions to the rule now, the modern Honda's use injectors that are designed to run reliably near 100% IDC.
'65 notch w/ a squirted type 4
http://supaninjanick.wordpress.com/
'68 "Zombie Response Vehicle" Westy
viewtopic.php?f=14&t=140387
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- Posts: 169
- Joined: Sat Aug 27, 2011 4:18 pm
Re: Fuel Injector Sizing
Deal, Deka's ordered along with cb end castings w/ rails!