Need some engine advice and suggestions...

[Hart_Rod]

Originally Posted by dave brode

Rob,

You will need a boost referenced pump. You need to have fuel pressure rise [from your base fp setting] 1 lb for each lb of boost.

The box and a carb hat function the same way. They both pressurize the carb. The hat also pressurized the bowls through the vent tubes. The box just makes fuel leakage from the throttle shafts a non-issue.


I do not believe that the black pump is capable of supplying enough fuel. If you run, say 8 psi boost, and a 7 psi, you'll need a pump that'll give you enough fuel flow at 15 psi fuel pressure. The pump will probably go 15 psi, but it will not flow well at that pressure.

Most experts will say that a high pressure pump setup with a return style regulator is the best setup.

Nice truck, btw.

Dave

Thanks for the info Dave. I agree on the return style regulator. I'm looking at some aeromotive stuff right now. I'll post links for some opinions later.

Originally Posted by Wild83C10

If you are getting blow bye you need a vacuum pump to pull pressure from the crank case. There are a few ways to go about this. You can spend $500+ on a belt driven vacuum pump/system or you can try an electric vacuum pump similar to what the mustang cobras run or you can see if a simple PCV system will work (closed valve cover breathers with a hose connected to a oil seperator then connect that to a port on the intake hose before the SC).

I hadn't thought of that. Way to think outside the box, .

I imagine vortec should have included a BOV (blow-off-valve) but it doesn't appear they do. I would recommend a 50mm X02 BOV, they are cheap and they work. This should keep you SC happy and your carb. When the throttle blades close the SC is still spinning and building boost, but the boost has no where to go so it will try and exit from somewhere by pushing passed your throttle blades or other parts of your carb, it will also build up back pressure on the SC.

Any suggestions on where to buy one of those BOV? Summit? Jegs?

As far as a boost reference fuel pump or regulator it doesn't matter if it's a mustang or a chevy pickup. For every pound of boost you need more fuel. I would imagine you need a boost referenced pump or reg. Call vortec back and tell them you have a 351 cleveland in a 89 mustang with this SC setup and you want to know what fuel pump they recommend. Then just buy one that has similiar specs. Do you have an AFR guage? I highly recommend one.

I don't have an AFR but will look into one.

Yes I would install some type of "cold air" setup. I'll see what I can come up with.

If the engine runs cool and no over heating issues then I wouldn't change anything. Adding the thermostat was a good move, 180 is probably the best temp.

I was suprised at how much difference the 180 made. I was having a problem with my plugs fouling really quickly before I put it in.

29" tall tire is a decent size tire and you may need 4.11, but I would drive the truck and run it at the track first before making any gear changes.

That makes a lot of sense.

Originally Posted by dave brode

From the Vortec site:

http://www.vortechsuperchargers.com/product.php?p=138

Read the "please note" section.

There's a lot of stuff in there, what exactly were you referring to?

Originally Posted by dave brode

You "could" run a this pump, or a similar mechanical dead-headed [non return style system]. They offer a boost reference fitting option. Imo, this would be marginal, as you would be at the edge of the pump's pressure capacity at 7 psi fp and 7 psi boost.

http://www.robbmcperformance.com/pro...chevy1100.html

Fwiw, I would buy more pump that you need, and do a return style system. A few seconds of detonation from running lean will destroy a supercharged engine quicker than it will a mild N/A'd deal.

Dave

Thanks again Dave. Since I already have an electric pump, I will probably stay with one.

Originally Posted by dave brode

Here is a good site for blow-through info, both turbocharged and centrifigul super-charged.

Beware: Study and search, and study more before asking questions. I would start with the newbie forum.

http://www.theturboforums.com/smf/index.php

Dave

Great Site! That's what I've been looking for, . I'm going to have a long night tonight......

[dave brode]

Originally Posted by Hart_Rod

Thanks again Dave. Since I already have an electric pump, I will probably stay with one.



[COLOR="blue"]Great Site! That's what I've been looking for, . I'm going to have a long night tonight......

glad to. There are site sponsers there that probably offer pumps. Mallory has two bypass regs that are popular. If the pump isn't too far an overkill, the smaller one works. By-pass side of system must flow enough to cover the pump's output at low fuel need times [idle, cruise etc]

Dave

[Hart_Rod]

Originally Posted by Wild83C10

Aeromotive makes some good stuff.

The x02 BOV can be purchased from VSracing.net

AFR: look at the Innovate LC1 w/digital gauge or the AEM model

If you want to learn more theturboforums is a good rescource also checkout yellowbullet.com/forum

http://www.vsracing.net/catalog/prod...43aaf05a7d8c53

This BOV installed where I have the arrow in the below picture? Do you know how much boost it can handle? I didn't see it listed. What are your thoughts on the location of the air filter?

Originally Posted by ProStreet71

Sorry for the bad info.

No worries. We're all here to learn, .

Originally Posted by dave brode

glad to. There are site sponserd there that probably offer pumps. Mallory has two bypass regs that are popular. If the pump isn't too far an overkill, the smaller one works. By-pass side of system must flow enough to cover the pump's output at low fuel need times [idle, cruise etc]

Dave

Thanks again for the info. I think I'm going to go with the Aero stuff. I've heard nothing but good about them.

[Wild83C10]

Originally Posted by Hart_Rod

This BOV installed where I have the arrow in the below picture? Do you know how much boost it can handle? I didn't see it listed. What are your thoughts on the location of the air filter?

Yes the BOV would be located in that section of the pipe, but you need the aluminum pipe, not the rubber.

The BOVs aren't rated for certain boost levels it all depends on how much air you are pushing. A 50 mm BOV should be sufficient. I'm not exactly sure how to calculate the size.

Like Alex1 suggested the A1000 is a good pump and will work well with your combo.

It's so easy spending someone else money. Although I just bought a few of these same items.

[Hart_Rod]

Originally Posted by Alex1

Sorry I forgot to mention.

Get a good fuel pump like an Aeromotive a1000 I think it is - Its good quality and will give you all the fuel this combo needs - you will need an adustible fuel pressure regulator and a return to the tank.

Also a like others have mentioned, a cold air set up would help too.

Also you need colder plugs with a blower - I'm not sure if thats what you're using or not

Is that flywheel HP or RWHP your making? I wasn't sure.

I'm using AR3933 plugs. Flywheel HP.

Originally Posted by Wild83C10

Yes the BOV would be located in that section of the pipe, but you need the aluminum pipe, not the rubber.

The BOVs aren't rated for certain boost levels it all depends on how much air you are pushing. A 50 mm BOV should be sufficient. I'm not exactly sure how to calculate the size.

Like Alex1 suggested the A1000 is a good pump and will work well with your combo.

It's so easy spending someone else money. Although I just bought a few of these same items.

Looks like I'll do the BOV first and then the regulator and pump. Can I cut out a section of the rubber and then add a piece of pipe in between with the BOV?