Apex high boost fuel pressure

[peteracing]

Hi guys!. On a high boost kit (25+ psi) did you change the fuel pressure
regulator and, at what psi did you set it?.
Thanks!

 

[Ted Jannetty]

Hi guys!. On a high boost kit (25+ psi) did you change the fuel pressure
regulator and, at what psi did you set it?.
Thanks!

Fuel pressure should remain stock off boost and should raise 1:1

So, 25 psi above stock pressure for 25 psi boost.

Your stock regulator may or may not give you a 1:1 pressure raise, monitor fuel pressure to see and then you can make a decission on if you need to change regulator to a 1:1 ratio regulator.

Ted

 

[snowy1]

I believe you are asking if anyone changes the fuel pressure befor boost comes on, I do not I run about 3lbs from 8 to 25lbs. as Ted said your regulator will increase the fuel pressure 1:1 to maintain your stock setting regardless of how much boost you run, everybody sets the stock setting alittle different, In the mountains we set it alittle less to help with the throttle chop, you just have to tune your initial jetting to the fuel pressure you are running. I would check readings at higher boost as you may need to make jetting changes.

 

[peteracing]

Guys! please read my post! i am asking about Fuel injected Apex...
What's the stock Apex injection fuel pressure?.
On high boost, you need even more pressure to run stock injectors!.
Thanks

 

[snowy1]

sorry about that just read the post and didn,t pay attebtion to the heading,

 

[peteracing]

No offence Snowy ! .

 

[HAMMER]

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http://www.ty4stroke.com/viewtopic.php?t=27289

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[Srxspec]

Stock PSI per my dyno session at Dynotech a week or so ago is 42 psi at a pretty constant pressure throughout the HP curve stock.

 

[Anonymous]

I got a new FPR with my boondocker gt28 kit if that can help you

 

[peteracing]

Hey Mulot! did you finally received it? :ORC

 

[Anonymous]

Yesss... I did, but big injectors in the kit, so I'm a bit fucked up....

 

[peteracing]

How many cc/min?. Didn't they send you a boost sensing reg.?

 

[Anonymous]

Yes they did, but in order to run real hi boost (20+ psi) I need larger fuel injectors...

They did not tell me what CC they were...

Anyway, if its not included, I will need to purchase a set.

What would you recommend me then?

 

[powderlites]

High boost Apex

We have run apex with our kit up to 25 PSI at high alitude with stock injectors and no change in regulator.
We do have rising regulator and adaptor kit for big boost guys.
What kit do you have Peter?
Also working on EFI box for MC guys and Have Boondock new box that works great.

http://www.powderlites.com

 

[Anonymous]

So you tell me stock inj are good for 25#?

Really?

I do have a new fpr that came with kit.