Hey guys,
I'm definetly going to buy a fuel pressure shut off/safety switch for my nitrous install. What I don't know is what pressure I need to buy. They're non-adjustable and increase from increments of 5psi-80psi or so. So basically, what's the minimum pressure I should be running a 125 shot at on a 305 w/ stock TBI unit?

Thanks in advance,
Alex

 

I use 42psi on a 100 shot no problems yet

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86 Irocz, 305 bored 40 over, 211/221 comp cam,paw rocker arms 1.5,10:1 comp., stock heads, 100 shot of nitrous,

soon to be airflow research 190 cc heads, 373 gears to replace 273, and induction work

 

is your IROC TBI???????

 

On a TBI car you are looking at around 10-12 PSI.

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Tracy /AKA IROCKZ4me
'86 IROC-Z Camaro
"Cogito ergo zoom"

• 355 cid
• AFR heads
• Arizona Speed & Marine hydraulic roller cam w/ AFR hydra-rev kit
• modified SLP runners
• TRW forged pistons/ceramic coated
• fully balanced
• Edelbrock headers/ceramic coated
• SLP cat-back
• Paxton supercharger
• Nitrous Express nitrous oxide

My IROC-Z
EFI Performance Club on Yahoo
Club IROC-Z