SV-1

Has anyone actually used one of these on the street. On their site they claim to work great in part throttle. I am curious as to how they are in the cold with no choke.

to this post as I am thinking about trying one too, but would like some back to back info from other than the manufacturer.

i heard they dont work so well

richter69 wrote:i heard they dont work so well

If you look over on YB it seems hit or miss. A real love it or hate kind of deal.

I was gonna say that very thing......

I've heard that the majority of people that moved up from a 4150 thought it was the cats meow, but the people who already ran real carbs lost performance. I can't imagine trying to run it on the street.

The info I got w/mine says they work great. I have driven mine down the road a few miles and back,and it's really smooth at any part of the throttle. Idles better than any big carb I have ever seen,and the responce is like injection.

I've bought one and so far really like it.It needs a little tweaking at part throttle as its slightly lean at that spot, but its a race car and has not been worth worrying about. The one thing that I really like is that it jumps on the brake INSTANTLY. I think I have been getting better lights just because I got more time to be focused on the tree. Cold weather cranking is very nice. I really thought hard before I spent the money, but so far has been worth it. Mine is a race car though, not a street car. FWIW, I had it on my chassis dyno one day and threw a 1050 domi on it and it lost about 28 RWHP, but the domi is not as big, so its not a valid test, but man the domi was sure a slow revver compared to the sv1. My 2 cents.

coupe perf wrote:I've bought one and so far really like it.It needs a little tweaking at part throttle as its slightly lean at that spot, but its a race car and has not been worth worrying about. The one thing that I really like is that it jumps on the brake INSTANTLY. I think I have been getting better lights just because I got more time to be focused on the tree. Cold weather cranking is very nice. I really thought hard before I spent the money, but so far has been worth it. Mine is a race car though, not a street car. FWIW, I had it on my chassis dyno one day and threw a 1050 domi on it and it lost about 28 RWHP, but the domi is not as big, so its not a valid test, but man the domi was sure a slow revver compared to the sv1. My 2 cents.

Could you explain more please? Engine hp? cfm size of sv1? spacers?etc?

Our test showed it made more horsepower but didn't et with the old 4150 prosystems. This was on an 800hp small block though. It did drive and respond great though at part throttle.

28RWHP seems like alot. Unless it was a big difference in the two carbs.

70FB wrote:28RWHP seems like alot. Unless it was a big difference in the two carbs.

Probably Patrick himself making the post! LOL

70FB wrote:

coupe perf wrote:I've bought one and so far really like it.It needs a little tweaking at part throttle as its slightly lean at that spot, but its a race car and has not been worth worrying about. The one thing that I really like is that it jumps on the brake INSTANTLY. I think I have been getting better lights just because I got more time to be focused on the tree. Cold weather cranking is very nice. I really thought hard before I spent the money, but so far has been worth it. Mine is a race car though, not a street car. FWIW, I had it on my chassis dyno one day and threw a 1050 domi on it and it lost about 28 RWHP, but the domi is not as big, so its not a valid test, but man the domi was sure a slow revver compared to the sv1. My 2 cents.

Could you explain more please? Engine hp? cfm size of sv1? spacers?etc?

598 BBF, 750 RWHP on motor, 1200+ cfm SV1, no spacer other than nitrous plate, and my a460 intake was shortened 1 inch for hood clearance. Cam is nitrous-oriented.

[quote="Curt"]

70FB wrote:28RWHP seems like alot. Unless it was a big difference in the two carbs.

Probably Patrick himself making the post! LOL[/quote

No sir, just my own observations. Patrick was extremly helpful though, maybe it was because I spent the money...but even so, he was helpful even after the sale.

Now, to be fair, I do believe the SV1 faired so well because the motor liked the larger carb. Even if the SV1 made no more HP I would still purchase another if for no other reason but it jumps on the transbrake so fast and clean.

Thanks. I'm just trying to nail down some things for a future A-head engine. (SCJ now) Want to get it right the first time. The one I have now took so long to get going it was and is outdated.

Patrick was also very helpful to me.

I've had my SV-1 for 2 years now and do around 2000miles a year of part throttle cruising and racing a couple of weekends a year. Idles smooth on cold starts and very responsive in any gear from idle to WOT. I run 4 jet sizes diference between cruising and the track when the pipes are off.


545ci
Comp cams XR292R roller cam
Blue thunder aluminium heads (chev exhaust)
Edelbrock Victor manifold
Pro Systems 1100cfm SV-1
MSD 6al2 and Crank trigger
Try-Y headers (2in primary and 2-1/4 secondary into 3in collector)

Car weighs about 3900lbs
10.82 @130mph 1/4 mile

https://www.429-460.com/t10503-1091-1305-mph-3900lb-falcon

bbcoupe wrote:I've had my SV-1 for 2 years now and do around 2000miles a year of part throttle cruising and racing a couple of weekends a year. Idles smooth on cold starts and very responsive in any gear from idle to WOT. I run 4 jet sizes diference between cruising and the track when the pipes are off.


545ci
Comp cams XR292R roller cam
Blue thunder aluminium heads (chev exhaust)
Edelbrock Victor manifold
Pro Systems 1100cfm SV-1
MSD 6al2 and Crank trigger
Try-Y headers (2in primary and 2-1/4 secondary into 3in collector)

Car weighs about 3900lbs
10.82 @130mph 1/4 mile

https://www.429-460.com/t10503-1091-1305-mph-3900lb-falcon

Damn, that's nice !!