Going FI question on 60lb and 80lb injectors
11-05-2010, 05:19 PM
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Going FI question on 60lb and 80lb injectors Hi all, I'm going with a single turbo setup this winter. It's going to be a turbonetics TC78 on a stock ls1 at 8lbs of boost. Hoping for 500whp+. My plan is to build up the engine a bit next winter to increase boost and go for 700ish whp. I'm trying to figure out the best fueling solution for my short and long term goal so that I don't hit a ceiling later. If i go with 80lb injectors now with the dual walbro setup will I have any drivability issues only pushing 500whp with this fueling setup? If there isn't going to be a consequence to getting the 80s over the 60's then I'm just going to get those so I know I won't have any issue later. Price difference is nothing. Thanks for the advice.
11-05-2010, 06:13 PM
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do the 80lb's and twin intanks now if your looking for 700+
i know a guy here on the forum putting down 760 and his 60's are MAXED!!! that is w/ a twin intank setup too.
i know a guy here on the forum putting down 760 and his 60's are MAXED!!! that is w/ a twin intank setup too.
11-05-2010, 06:46 PM
#3
80# injectors may pose an idle problem on a stock LS1 motor. 60's are marginal with idle tuning on a stock bottom end vehicle.
If building a complete fuel system, we may be able to alter your fuel pressure enough to work in a stock application.
Feel free to contact me about a dual pump kit or fuel sysem for this application.
If building a complete fuel system, we may be able to alter your fuel pressure enough to work in a stock application.
Feel free to contact me about a dual pump kit or fuel sysem for this application.
11-05-2010, 08:24 PM
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I run 80's with no idle problems at all. My motor however is a 408CI. I'm actually out of injector with more Turbo left at this point. Keep in mind that I'm at 906RWHP through a TH400. My fuel pressure is as high as I dare go. I have a boost referenced fuel pressure regulator also.
11-05-2010, 09:59 PM
#6
Your engine size has a lot to do with the idle flow requirements, plus I suspect you are not running a stock cam either....
The 18% larger engine makes the 80's equivalent to 67's in a stock 346.
Add in the larger cam, increased idle speed & air flow, & you can easily see why 80's will work so well in a built 408.
Your 906rwhp though an unlocked auto corresponds pretty well to the limits of the 80's.
A stick car may see an additional 100rwhp on the same injector.
The 18% larger engine makes the 80's equivalent to 67's in a stock 346.
Add in the larger cam, increased idle speed & air flow, & you can easily see why 80's will work so well in a built 408.
Your 906rwhp though an unlocked auto corresponds pretty well to the limits of the 80's.
A stick car may see an additional 100rwhp on the same injector.
