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bpu699 bpu699 is offline
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Join Date: Apr 2007
Location: wisconsin
Posts: 2,539
Originally Posted by Uncle View Post
So I've maxed out the adjustable WUR and have cranked up the fuel pressure as far as I dare (10.2@1,000rpm) but still need more fuel at 5500+ rpm. AFR gauge is telling me 12.5 at 5,500 and 13+ to 6.500rpm.
The right balance for the CSV seems to be 4200rpm with full boost coming on at bang on 3000rpm.
Everything else is just fine but I just can't get enough fuel a higher RPM.

Am I missing something or is the answer a modded fuel head? I'm good with EFI but CIS is still new to me.

Specs are,
87 3.3ltr
Fabspeed headers with Zork tube.
Andial Cooler.
1 bar spring.
K&N Filter on the metering plate.
100RON fuel.
Are there other modifications? Is it the one bar spring that makes it lean?

I have a pretty similar set up...
88 3.3, k27, andial inter cooler, pretty open exhaust, and had a 1 bar spring but went back to stock...

Mine runs rich...

Hmmm. I am starting to wonder if the po modified the crap out of it... He had an adjustable boost valve on there and a bunch of other crap...

But in your set up, why wouldn't stock flow be adequate???

What afr are you shooting for at full boost? I see some folks shooting for 12.5 or so, yet when folks post videos I see the afr briefly dip below 10....

Old 11-17-2014, 05:15 PM
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