mostafa3k

I'm planning on doing the AFPR project to my 305 TBI. How can i take best advantage of the upped fuel pressure?

I was thinking of doing MSD wires and coil, coupled with forced air induction.

I saw a dyno-chart on thew FAQ which showed the effects of "upped" fuel pressure on a stock 350 TPI. It showed increases of 20-50hp and 50-80 lbs. of toque. I hope to acheive increases like these on my TBI if i do it right.

Would a new ignition module (msd-6a) make a significant difference on higher fuel pressures? Or would the coil, wires, and air induction be enough?

Yarnboy

AHAHAHHAHAHHHAHAHH...God no! TPiS (The Part is $hit) Also says remving the MAF screens gives you 10 HP..and changing your stat gives you 10 and the TB bypass gives you 10 and using P4 plugs gives you 5 and the MAT relocation gives you like 7..The only thing they are good for is The Mini Ram and the ZZ9. You will NEVER IN YOUR LIFE get 50 hp from raising your fuel pressure. You may get a tenth or 2 if you are lucky. Me, I went slower till I set it back to stock. The bottom line is those claims are outragous.

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• Red '88 IROC 5 Speed 305 TPI w/3.08
• Dual Friction Stage III Centerforce Clutch
• Accel 300+ Racing Ignition
• Accel 300+ Pro Sleeve Plug Wires
• Accel U-Groove Plugs
• Flowmaster Force II 3 Chamber Cat Back Exhaust
• Hypertech Chip
• Hypertech Airfoil
• Removed, Then Re-installed (out of fear) MAF Screens
• Gutted Air Box
• Best E/T 14.686, 60' 2.205, 1/8th mile 9.461, 1/4 MPH 93.91
• Best 60' 2.17
• TPiS AFPR set to 44psi using Accel Fuel pressure gauge (Installed after run)
• Aluminum Driveshaft (Installed after run)

The ODB

ooops, I see you have TBI now,
nevermind.

[This message has been edited by The ODB (edited March 19, 2001).]

mostafa3k

Okay... sO now we know that the FAQ is fulla crap.

Now back to my question. How may i better take advantage of upped fuel pressure?

branz28

better airflow, etc would help. and as you've probably seen in other posts, going to a dyno or to the track and raising it or lowering it till your ET or dyno numbers drop is the correct way, then go back to the PSI before it started to drop (sorry if i confused you, i'm not good at explaining). Unless i'm pictureing TBI differently..heh..

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89 IROC-Z 350 TPI

-Flowmaster Catback
-Performance Resource Chip
-700R4 (Rebuilt) Too much done to actually list
-K&N Airfilters
-Ported Plenum
-2.77 Gears (not much to brag about but eh, its there)
-MSD 8.5 mm plug wires
-Gutted cat
-!AIR