Pro systems SV1 problems

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Pro systems SV1 problems

Post  Bosskk1786 on October 19th 2017, 4:47 pm

Hello all I have an SV1 on my 545 inch boss 429. Runs great on the top end but stumbles and misses between 3000-3500 rpm.... Running a kaase 4150 and the pro systems spacer. It's 110mm blade flow 1200cfm. When it gets to that rpm it's almost like the engine stalls.... This is only under wot. Any ideas?.... I've made 4 passes on it so far and it stumbled every time... Put my Holley 1000 with annular boosters on and it runs perfect and feels way stronger.... If I can figure out how to upload my passes from my GoPro you can watch the engine stumble.... Thanks for any help in advance.... Joe

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Re: Pro systems SV1 problems

Post  bruno on October 19th 2017, 7:03 pm

Have you talked to Patrick at pro-systems ?
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Re: Pro systems SV1 problems

Post  dfree383 on October 19th 2017, 7:26 pm

Whys the car leaving at such low rpm? Race car right?

Sounds like you need some bleed tuning or acceleratorpump/nozzle change.
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Re: Pro systems SV1 problems

Post  Bosskk1786 on October 19th 2017, 7:31 pm

No I have not. I looked on their website for some tech tips. Didn't really find anything that sounded like my problem. I put the spacer cause I was told the throttle blade has to be out of the intake plenum... It didn't change the issue at all so I shelved it and put my Holley on.... It's acted like this since the day I put it on.... Has 4 passes and about 5 miles on it... The first time it happened it was like the engine shut off I took my foot out of it then stepped on it again and it took off..... Next pass same thing

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Re: Pro systems SV1 problems

Post  Bosskk1786 on October 19th 2017, 7:33 pm

It's a street car. I launch soft cause I haven't gotten it to be able to bite yet and want to try to keep it straight

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Re: Pro systems SV1 problems

Post  DanH on October 19th 2017, 10:22 pm

You check the fuel pressure and the float level?  Let up on the throttle then back on. Could be it gives it time to fill the bowls.

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Re: Pro systems SV1 problems

Post  BOSS 429 on October 19th 2017, 10:43 pm

Bosskk1786 wrote:Hello all I have an SV1 on my 545 inch boss 429. Runs great on the top end but stumbles and misses between 3000-3500 rpm.... Running a kaase 4150 and the pro systems spacer. It's 110mm blade flow 1200cfm. When it gets to that rpm it's almost like the engine stalls.... This is only under wot. Any ideas?....  I've made 4 passes on it so far and it stumbled every time... Put my Holley 1000 with annular boosters on and it runs perfect and feels way stronger.... If I can figure out how to upload my passes from my GoPro you can watch the engine stumble.... Thanks for any help in advance.... Joe




Call me sometime, I work with those a lot,and im a dealer for pro systems
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Re: Pro systems SV1 problems

Post  Bosskk1786 on October 19th 2017, 10:57 pm

DanH wrote:You check the fuel pressure and the float level?  Let up on the throttle then back on. Could be it gives it time to fill the bowls.
fuel pressure is 7.5psi on the fuel log.. float level is just on the bottom of the sight glass

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Re: Pro systems SV1 problems

Post  Bosskk1786 on October 19th 2017, 11:01 pm

BOSS 429 wrote:
Bosskk1786 wrote:Hello all I have an SV1 on my 545 inch boss 429. Runs great on the top end but stumbles and misses between 3000-3500 rpm.... Running a kaase 4150 and the pro systems spacer. It's 110mm blade flow 1200cfm. When it gets to that rpm it's almost like the engine stalls.... This is only under wot. Any ideas?....  I've made 4 passes on it so far and it stumbled every time... Put my Holley 1000 with annular boosters on and it runs perfect and feels way stronger.... If I can figure out how to upload my passes from my GoPro you can watch the engine stumble.... Thanks for any help in advance.... Joe




Call me sometime, I work with those a lot,and im a dealer for pro systems
will do rich.. just got a set of comp solid rollers for it need your expertise on a cam and spring package also

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Re: Pro systems SV1 problems

Post  Curt on October 20th 2017, 9:23 am

My first question would be, why would you put an SV1 on a street car? They barely work on an all out performance car.
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Re: Pro systems SV1 problems

Post  dfree383 on October 20th 2017, 9:27 am

Curt wrote:My first question would be, why would you put an SV1 on a street car?  They barely work on an all out performance car.

That's my point they are more of a race car thing IMO. Kinda like trying to run a Rons toilet on a grocery getter.....
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Re: Pro systems SV1 problems

Post  BOSS 429 on October 20th 2017, 9:30 am

Curt wrote:My first question would be, why would you put an SV1 on a street car?  They barely work on an all out performance car.





we dont have a prob with them ON STREET CARS, unless the engine does not move enough air for one , as in HP.
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Re: Pro systems SV1 problems

Post  Bosskk1786 on October 20th 2017, 3:38 pm

dfree383 wrote:
Curt wrote:My first question would be, why would you put an SV1 on a street car?  They barely work on an all out performance car.

That's my point they are more of a race car thing IMO. Kinda like trying to run a Rons toilet on a grocery getter.....
why not run an SV1?.... When I talked with Patrick I gave him all my specs and told him it would be a street/ strip car. I'm sure if he didn't think it was a good idea to run an SV1 he would have steered me in a different direction... let's no forget a boss 429 was a detuned race engine! Twisted Evil

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Re: Pro systems SV1 problems

Post  Bosskk1786 on October 20th 2017, 3:40 pm

BOSS 429 wrote:
Curt wrote:My first question would be, why would you put an SV1 on a street car?  They barely work on an all out performance car.
I sure hope it moves enough air! Lol.... If not we'll get it there!




we dont have a prob with them ON STREET CARS, unless the engine does not move enough air for one , as in HP.

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Re: Pro systems SV1 problems

Post  dfree383 on October 20th 2017, 4:23 pm

Bosskk1786 wrote:
dfree383 wrote:
Curt wrote:My first question would be, why would you put an SV1 on a street car?  They barely work on an all out performance car.

That's my point they are more of a race car thing IMO. Kinda like trying to run a Rons toilet on a grocery getter.....
why not run an SV1?.... When I talked with Patrick I gave him all my specs and told him it would be a street/ strip car. I'm sure if he didn't think it was a good idea to run an SV1 he would have steered me in a different direction... let's no forget a boss 429 was a detuned race engine! Twisted Evil

You missing the point, Real race cars a generally not operating like a street car or running as low as your having problems at.

I'm not saying anything bad about Patrick, i like the guy, but the SV1 carbs just don't work on everything from what I've seen over the years
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Re: Pro systems SV1 problems

Post  Bosskk1786 on October 20th 2017, 4:33 pm

dfree383 wrote:
Bosskk1786 wrote:
dfree383 wrote:
Curt wrote:My first question would be, why would you put an SV1 on a street car?  They barely work on an all out performance car.

That's my point they are more of a race car thing IMO. Kinda like trying to run a Rons toilet on a grocery getter.....
why not run an SV1?.... When I talked with Patrick I gave him all my specs and told him it would be a street/ strip car. I'm sure if he didn't think it was a good idea to run an SV1 he would have steered me in a different direction... let's no forget a boss 429 was a detuned race engine! Twisted Evil

You missing the point, Real race cars a generally not operating like a street car or running as low as your having problems at.

I'm not saying anything bad about Patrick, i like the guy, but the SV1 carbs just don't work on everything from what I've seen over the years
I understand.... I'm willing to buy a dominator be it another pro systems or quick fuel... I spent a lot of money on this carb was just hoping to make it work on my application is all. I did a lot of research on these before I bought it and all the stuff I read said how clean and crisp the throttle response was...

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Re: Pro systems SV1 problems

Post  68galaxie on October 20th 2017, 11:26 pm

You should chat with bbcoupe (the Aussie guy with a 545" Aussie Falcon 10.47@133 4000 lbs)
He runs a Prosystems SV1. His car seems to run very well on the street and track.

Perhaps pick his brain on the set-up for his SV1.
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Re: Pro systems SV1 problems

Post  dfree383 on October 21st 2017, 10:36 am

Bosskk1786 wrote:
dfree383 wrote:
Bosskk1786 wrote:
dfree383 wrote:
Curt wrote:My first question would be, why would you put an SV1 on a street car?  They barely work on an all out performance car.

That's my point they are more of a race car thing IMO. Kinda like trying to run a Rons toilet on a grocery getter.....
why not run an SV1?.... When I talked with Patrick I gave him all my specs and told him it would be a street/ strip car. I'm sure if he didn't think it was a good idea to run an SV1 he would have steered me in a different direction... let's no forget a boss 429 was a detuned race engine! Twisted Evil

You missing the point, Real race cars a generally not operating like a street car or running as low as your having problems at.

I'm not saying anything bad about Patrick, i like the guy, but the SV1 carbs just don't work on everything from what I've seen over the years
I understand.... I'm willing to buy a dominator be it another pro systems or quick fuel... I spent a lot of money on this carb was just hoping to make it work on my application is all. I did a lot of research on these before I bought it and all the stuff I read said how clean and crisp the throttle response was...

Call Patrick up he's always willing to help, like I said earlier probably just needs some tuning
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Re: Pro systems SV1 problems

Post  Bosskk1786 on October 21st 2017, 10:44 am

68galaxie wrote:You should chat with bbcoupe (the Aussie guy with a 545" Aussie Falcon 10.47@133 4000 lbs)
He runs a Prosystems SV1. His car seems to run very well on the street and track.

Perhaps pick his brain on the set-up for his SV1.
thanks for the tip!.... My mustang is at about 3800lbs... Fastest trap speed so far on my GPS is 131 at the airport we drag at they don't have timing equipment yet. That's with the carb acting up. It's a no prep race so I gotta leave soft to keep from blowing the tires off it

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Re: Pro systems SV1 problems

Post  Bosskk1786 on October 21st 2017, 11:47 am

dfree383 wrote:
Bosskk1786 wrote:
dfree383 wrote:
Bosskk1786 wrote:
dfree383 wrote:
Curt wrote:My first question would be, why would you put an SV1 on a street car?  They barely work on an all out performance car.

That's my point they are more of a race car thing IMO. Kinda like trying to run a Rons toilet on a grocery getter.....
why not run an SV1?.... When I talked with Patrick I gave him all my specs and told him it would be a street/ strip car. I'm sure if he didn't think it was a good idea to run an SV1 he would have steered me in a different direction... let's no forget a boss 429 was a detuned race engine! Twisted Evil

You missing the point, Real race cars a generally not operating like a street car or running as low as your having problems at.

I'm not saying anything bad about Patrick, i like the guy, but the SV1 carbs just don't work on everything from what I've seen over the years
I understand.... I'm willing to buy a dominator be it another pro systems or quick fuel... I spent a lot of money on this carb was just hoping to make it work on my application is all. I did a lot of research on these before I bought it and all the stuff I read said how clean and crisp the throttle response was...

Call Patrick up he's always willing to help, like I said earlier probably just needs some tuning
I'll give him a call.... I was leaning towards an accelerator pump issue cause when I drive it without the hood and air cleaner off and watch the pump jets it looks like a garden hose spraying..... Thanks for your input!

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Re: Pro systems SV1 problems

Post  nickbay on October 22nd 2017, 3:24 pm

He has a website that he answers quite quickly.
http://prosystems.websitetoolbox.com/
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Re: Pro systems SV1 problems

Post  Bosskk1786 on October 22nd 2017, 5:26 pm

nickbay wrote:He has a website that he answers quite quickly.
http://prosystems.websitetoolbox.com/
thanks I forgot about that.. I'll have to find my build# and ask some questions

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Re: Pro systems SV1 problems

Post  nickbay on October 22nd 2017, 8:21 pm

Bosskk1786 wrote:
nickbay wrote:He has a website that he answers quite quickly.
http://prosystems.websitetoolbox.com/
thanks I forgot about that.. I'll have to find my build# and ask some questions

Yea, you had me wondering why you weren't contacting Patrick.
I have 3 of his conventional carbs and I'm happy.
He designed it, he will definitely know how to make it work.
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Re: Pro systems SV1 problems

Post  bbcoupe on October 25th 2017, 3:41 am

Bosskk1786 wrote:
68galaxie wrote:You should chat with bbcoupe (the Aussie guy with a 545" Aussie Falcon 10.47@133 4000 lbs)
He runs a Prosystems SV1. His car seems to run very well on the street and track.

Perhaps pick his brain on the set-up for his SV1.
thanks for the tip!.... My mustang is at about 3800lbs... Fastest trap speed so far on my GPS is 131 at the airport we drag at they don't have timing equipment yet. That's with the carb acting up. It's a no prep race so I gotta leave soft to keep from blowing the tires off it

Hi,
I've had an SV-1(95mm 1100cfm) on my 545ci street car for 7 years and it has done everything I asked for out of the box, have tried a few changes but end up back as Patrick built it. Patrick has always been happy to offer me assistance via direct contact or many forms of social media.
I only get to race a couple of days a year and average around 5000 miles a year cruising.
The only thing I've found is they are sensitive with fuel pressure and float settings, do you have a fuel pressure gauge in the car?

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Re: Pro systems SV1 problems

Post  Bosskk1786 on October 25th 2017, 8:45 am

bbcoupe wrote:
Bosskk1786 wrote:
68galaxie wrote:You should chat with bbcoupe (the Aussie guy with a 545" Aussie Falcon 10.47@133 4000 lbs)
He runs a Prosystems SV1. His car seems to run very well on the street and track.

Perhaps pick his brain on the set-up for his SV1.
thanks for the tip!.... My mustang is at about 3800lbs... Fastest trap speed so far on my GPS is 131 at the airport we drag at they don't have timing equipment yet. That's with the carb acting up. It's a no prep race so I gotta leave soft to keep from blowing the tires off it

Hi,
I've had an SV-1(95mm 1100cfm) on my 545ci street car for 7 years and it has done everything I asked for out of the box, have tried a few changes but end up back as Patrick built it. Patrick has always been happy to offer me assistance via direct contact or many forms of social media.
I only get to race a couple of days a year and average around 5000 miles a year cruising.
The only thing I've found is they are sensitive with fuel pressure and float settings, do you have a fuel pressure gauge in the car?
yes I do.. I have it adjusted to 7.5 psi .... It reads that at the back of the fuel log..... I did get ahold of Patrick he said to drill out port 5 in the main body as that is just plugged according to my build sheet. It's the intermediate fuel supply. I gotta open it to .040 and let him know what happens

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