Safe boost level

3703 Views 12 Replies 6 Participants Last post by SoloBusa, Jan 17, 2013

anjunabeats91

Discussion Starter · Jan 15, 2013

So I ordered a 3.85 size pulley from procharger and will make 10 psi. Im a little concerned if that will be not safe or pushing the stock internals too much. Anyone know if that fine to do on the stock engine? Anyone making 10 psi or more?

Also Im at 393 RWHP and 316 torque, how much gains am I expecting with 2 more pounds of boost?

Thanks

Save

1 - 13 of 13 Posts

SoloBusa

· #2 · Jan 15, 2013

I only made 9.5 psi with the 3.85" pulley and full exhaust. I made 430/350 at the wheels I think. I cant remember exactly now, it was a long time ago. lol You could hit 10 psi if you still have the stock exhaust manifolds and cats. You should be around 420rwhp. That would be my max if I were you for long term dependability. If you build a street tune with 93 octane and then build a race tune with 110, C16 or E85 you could push more timing and get to 450rwhp. You could safely run that level with those fuels. You'll enjoy that level of power.

What is your limiter set at? Stock 6800? You can run up too 7400rpm safely just to let it pull harder in the thrird and fourth gears.

Remember my engine popped at 550rwhp/430rwtq. That is the deadnuts limits of this engine for race abuse in my opinion.

See less See more

Save

2Manystangs

· #3 · Jan 15, 2013

a good tune, good fuel, and common sense are the main things to have with boost...if that thing EVER knocks or misses get out of it immediately...get an onboard a/f meter as well so you can know if something is wrong, more power is probably not what you need, suspension and hook will be your limiting factor

See less See more

Save

SoloBusa

· #4 · Jan 15, 2013

I would hope that you already have the gauges. A/F, Exhaust Temp and Boost Pressure are the minimum you need. With E85 you truly cant get pre-detonation. If you stay on 93 then you really need to watch the A/F guage when your into it. If it starts knocking the computer will adjust the timing to compensate. Just dont let your tuner turn off your knock sensors or even adjust them in the tune.

See less See more

Save

Nibis

· #5 · Jan 15, 2013

Do any guages come with the Procharger kit?

Save

randeez11

· #6 · Jan 16, 2013

gauges do not come with the Procharger kit. On my 5.0 I went from the 4.00 stock pulley to a 3.85 . It picked up about 1.5 pounds and only 10 rwhp. Maybe on a smaller motor you may get more boost.

Save

anjunabeats91

Discussion Starter · #7 · Jan 16, 2013

SoloBusa said:
I only made 9.5 psi with the 3.85" pulley and full exhaust. I made 430/350 at the wheels I think. I cant remember exactly now, it was a long time ago. lol You could hit 10 psi if you still have the stock exhaust manifolds and cats. You should be around 420rwhp. That would be my max if I were you for long term dependability. If you build a street tune with 93 octane and then build a race tune with 110, C16 or E85 you could push more timing and get to 450rwhp. You could safely run that level with those fuels. You'll enjoy that level of power.

What is your limiter set at? Stock 6800? You can run up too 7400rpm safely just to let it pull harder in the thrird and fourth gears.

Remember my engine popped at 550rwhp/430rwtq. That is the deadnuts limits of this engine for race abuse in my opinion.

Yeah I was thinking around 420rwhp as well, and id be happy with that on 93 octane. My limiter I believe is set at 6800.

Wow what got you to those numbers?? thats close to gt supercharged territory!

See less See more

Save

anjunabeats91

Discussion Starter · #8 · Jan 16, 2013

I have an air fuel analog gauge, and my tuner is pretty safe so I dont think he'll turn off the knock sensors.

And Ive been asking around and getting different opinions on fuel injectors; im not that familiar with the fuel systems, but does anyone know if I need to upgrade to 80 lbs/hr fuel injectors? or can I keep my 50 lbs/hr ones that came with the kit if I use the 3.85 pulley?

See less See more

Save

anjunabeats91

Discussion Starter · #9 · Jan 16, 2013

randeez11 said:
gauges do not come with the Procharger kit. On my 5.0 I went from the 4.00 stock pulley to a 3.85 . It picked up about 1.5 pounds and only 10 rwhp. Maybe on a smaller motor you may get more boost.

You get bigger injectors too? or did you keep the ones from the kit?

Save

randeez11

· #10 · Jan 16, 2013

anjunabeats91 said:
You get bigger injectors too? or did you keep the ones from the kit?

Stayed with the ones that came with the stage 2 kit.

Save

SoloBusa

· #11 · Jan 16, 2013

50lb will be fine for what your looking at. I have 92.5 lb but that is for the E85 tune.

Save

bluebyu12

· #12 · Jan 17, 2013

hmmm id like to do this eventually.. i think my tune is so safe now, so much fuel and low timing I could proably get away with just swapping the pulley, doing a data log and it should all look good. I think a dyno tune would be a waste for 2lbs more of boost. A few days ago when i drove my car I acaully was getting like 8.5psi at 6900rpms. It was like 40 degrees out though.. and too much fun haha

See less See more

Save

SoloBusa

· #13 · Jan 17, 2013

No a dyno tune is not a waste for a 2psi increase. You could be rich now and add in 2psi and you could be running in the high 13 A/F at WOT. That makes cool little holes in the tops of those cast pistons. Dont skimp on tuning or you'll be spending 20x more replacing your engine.

Save

1 - 13 of 13 Posts

This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.

Top Contributors this Month