MSD Boost a Pump

[mntngts99]

I'm planning on adding the MSD Fuel Pump Voltage Booster. Any tips or tricks ?
Thanks

 

[Simms]

I mounted the relay right to the pcm cover using one of the bolts. Take the wires right up to the fuel pump. You can attach right to the plug there. To get to the fuel pump, remove the carpet on the bulck head and the access panel is right there. Use a coat hanger to fish the wires up to the harness. The access panel has rivets that need drilled out. They are pretty big, and I am sure expensive for rivets. I used those metal tabs with the nut already attached (not sure what they are called), and a set of screws. Works perfect and you don't have to drill out rivets again if you need to get back in there.

 

[1TONY1]

I prefer the Kenne-Bell boost-a-pump over the msd. They work a little different. Are you supercharged ? Are you sure the MSD will work on a n/a application ?

http://www.msdignition.com/

http://www.kennebell.net/accessories/boostapump/boostapump.htm

 

[mntngts99]

Simms Thank you
Tony Going with Roe S/C I'll look at the Kenne-Bell thanks

 

[Simms]

If you get the MSD from Sean, just follow his directions and you will be ok. Just remember DO NOT tap into the wires, make NEW connections.

The Kenne Bell unit that Tony is using is also very nice!

 

[mntngts99]

Simms what are you #'s you have what I'm after.
Brad

 

[1TONY1]

Am I correct in saying the MSD needs to be near the engine because the boost port is on the MSD box ?

If so, you take 12+/- volts near the engine and raise the voltage and then you have a long wire to the fuel pump. With the KB, you have the boost sensor mounted at the engine with a signal wire to the box....then the booster box is located near the pump (near the battery...good voltage)with a "short" wire to the pump.
Also, And I'm not "exactly" clear on this....how does the MSD raise voltage ? Based on boost reference 5 psi to 30 psi. What happens if you only have 8 psi ? How much is the voltage increase.
The KB can do it's max increase when you get to 3 psi. I haven't measured the voltage increase, maybe I should check it one day.
Just food for thought.

 

[mntngts99]

Tony you have good points and info, Thats way I'm asking. I talked with Todd today and he said he use to have the MSD before going to the h2o/****. Nice to have other options

 

[ANIL8-U]

I getting ready to install my MSD boost a pump, does anyone have pic's they can post?

 

[Simms]

Am I correct in saying the MSD needs to be near the engine because the boost port is on the MSD box ?

If so, you take 12+/- volts near the engine and raise the voltage and then you have a long wire to the fuel pump. With the KB, you have the boost sensor mounted at the engine with a signal wire to the box....then the booster box is located near the pump (near the battery...good voltage)with a "short" wire to the pump.
Also, And I'm not "exactly" clear on this....how does the MSD raise voltage ? Based on boost reference 5 psi to 30 psi. What happens if you only have 8 psi ? How much is the voltage increase.
The KB can do it's max increase when you get to 3 psi. I haven't measured the voltage increase, maybe I should check it one day.
Just food for thought.

You are correct on the location and hook up of the MSD box. It becomes your new fuel relay. I don't think the long wires to the pump are a bad thing, you just want to tap them in as close as possible.

I'm really not sure on how it raises voltage either. MSD says the voltage is increased to the fuel pump in proportion to manifold boost pressure. Max. is 22 volts with 30psi, and the min is 1.5 volts with 5psi. What happens in between...I have no idea. It does have an adjustable potentionmeter for voltage output. Its probably best to test fuel pressure at different settings to make sure everything is good.

 

[Simms]

Simms what are you #'s you have what I'm after.
Brad

My car is going to Larry Macedo. Once it returns I'll have some numbers to go by.

 

[ANIL8-U]

Will a MSD work on a N/A setup?

 

[mntngts99]

It would be the same as stock on a N/A car. The only time fuel and voltage is increased is under boost.

 

[Simms]

Will a MSD work on a N/A setup?

A few guys are running it on their N/A setups to squeeze out a little volume. I'm not sure on their results. Ask V10MOJO, I think he is using one on his N/A car.

 

[J DAWG]

Will a MSD work on a N/A setup?

it raised my fuel pressure by less than 1 psi on my N/A heads/cam car.

I would not have spent the money or time if I had known that prior.


John

 

[Simms]

Will a MSD work on a N/A setup?

it raised my fuel pressure by less than 1 psi on my N/A heads/cam car.

I would not have spent the money or time if I had known that prior.


John

I thought they only raise voltage, not pressure?

 

[Donzi]

Ok, I'll bite.....how in the world can a fuel pump raise voltage??
Do you meen volume?

 

[Simms]

Ok, I'll bite.....how in the world can a fuel pump raise voltage??
Do you meen volume?

MSD raises the voltage to the pump, in turn the pump puts out more volume.

 

[Donzi]

Ok, I'll bite.....how in the world can a fuel pump raise voltage??
Do you meen volume?

MSD raises the voltage to the pump, in turn the pump puts out more volume.

Very cool! So the stock fuel pump can handle the extra voltage with no ill efects?

 

[FE 065]

I think JackB said once the computer would overrule any volume increase a Boostapump would try and give.

 

[J DAWG]

Will a MSD work on a N/A setup?

it raised my fuel pressure by less than 1 psi on my N/A heads/cam car.

I would not have spent the money or time if I had known that prior.


John

I thought they only raise voltage, not pressure?

by raising the voltage to the pump and spinning it harder it is supposed to sustain the pressure if one is seeing a pressure drop. Above 5200rpms my fuel psi was fading a little (which most due I suppose), but since I was already at the limits of the pump and I wanted to support it in anyway I could. Adding the MSD keep the psi up 1 psi more at those higher rpms as indicated by my fuel pressure gauge. volume should also be increased in relationship to increasing presure, but I have no way to monitor that.

 

[mntngts99]

J DAWG
what are you using to trigger the MSD to initiate the voltage increase. My understanding is that without boost it operates at stock spec's.

 

[Simms]

Will a MSD work on a N/A setup?

it raised my fuel pressure by less than 1 psi on my N/A heads/cam car.

I would not have spent the money or time if I had known that prior.


John

I thought they only raise voltage, not pressure?

by raising the voltage to the pump and spinning it harder it is supposed to sustain the pressure if one is seeing a pressure drop. Above 5200rpms my fuel psi was fading a little (which most due I suppose), but since I was already at the limits of the pump and I wanted to support it in anyway I could. Adding the MSD keep the psi up 1 psi more at those higher rpms as indicated by my fuel pressure gauge. volume should also be increased in relationship to increasing presure, but I have no way to monitor that.

Ah, I see. Is this why Rich put one on too?

 

[Jack B]

The Kenne Bell boost-a-pump is adjustable from 13.5 volts thru 17.5. For every one volt increase beyond 13.5 the volume goes up by 7%. In other words the volume will increase approx 30% at 17.5 volts.

The barometer of trouble with the stock pump is very simple, there is a volume problem if the pressure drops below 50 psi at 5000-5500. The 50 psi number is an average, since the regulator makes the pressure curve appear similar to a saw tooth. This is very hard to see unless you are logging.

 

[J DAWG]

J DAWG
what are you using to trigger the MSD to initiate the voltage increase. My understanding is that without boost it operates at stock spec's.

I have a vec2 and Sean includes a t to tap into the vacuum coming off the drivers side intake and I just turn the thing all the way up. Can't remember if it was full CW or CCW.


I have heard the older GENII cars and GENI's respond better(as told by a viper tuner), but newer GENII's don't. Doesn't really make sense to me.


Again, it helped "sustain" 1 more psi at higher rpm's for me, but did not create any additional pressure above my peak pressure prior to install.


John

 

[Dimitrios]

is this required on a 5lb boost pulley on ROE SC???

 

[Simms]

is this required on a 5lb boost pulley on ROE SC???

No.

 

[Dimitrios]

is this required on a 5lb boost pulley on ROE SC???

No.

when would i need it then? say 8lbs or higher? what would happen if I DID install it?

 

[Simms]

is this required on a 5lb boost pulley on ROE SC???

No.

when would i need it then? say 8lbs or higher? what would happen if I DID install it?

I know it is required with an 8lb pulley, but I personally would do a new fuel system if I went to 10lb.

I'm not sure what would happen if you used it with a 5lb pulley. I don't think it would cause any harm, but I'd leave that answer to the experts like Sean, Macedo, 1Tony1, Tator, Weaver, etc.