vortech v9 boost question
vortech v9 boost question would anybody have any idea why I can only get about 7 pounds of boost ? thats with a 2.75 pulley. I,ve got dart heads and a fast intake. could that have anything to do with it? I,ve also got a small cam, not sure what size, it was in the car when I biught it. My guess is that it,s small. Thanks
dont forget headers and exhaust make a difference to, as you will lose some boost with a more free flowing set-up.
i see a solid 8pounds with a 2.75 pulley,
and all i have is the sc, and full exhaust.
i see a solid 8pounds with a 2.75 pulley,
and all i have is the sc, and full exhaust.
Teching In
Joined: Dec 2008
Posts: 27
Likes: 0
From: Warren, Ohio
With my G-trim I see 9.2 pounds of boost at 65k rpms with 2.95" pulley and a custom front mount intercooler. The only mods I really have besides my blower are long tubes, 3" true dual exhaust and a ported MAF/throttle body. I set my MAF up so it is blow through--after the intercooler right before the throttle body. I have 2001Verts old custom Intercooler piping to mate to my front mount. I'd bet if you pick up a 2.65" pulley and relocate your maf after the blower and before the the throttle body (blow through) you'll see a pound or two gain of boost. Hope this helps.
With my G-trim I see 9.2 pounds of boost at 65k rpms with 2.95" pulley and a custom front mount intercooler. The only mods I really have besides my blower are long tubes, 3" true dual exhaust and a ported MAF/throttle body. I set my MAF up so it is blow through--after the intercooler right before the throttle body. I have 2001Verts old custom Intercooler piping to mate to my front mount. I'd bet if you pick up a 2.65" pulley and relocate your maf after the blower and before the the throttle body (blow through) you'll see a pound or two gain of boost. Hope this helps.
Teching In
Joined: Dec 2008
Posts: 27
Likes: 0
From: Warren, Ohio
Thanks. I made 484 rwhp and 452rwtq on a mustang dyno. I'd guess it be around 500 on the dynojet, since the mustang tends to read a little more accurate IMO. I just recently finished my install. I still have to get some pictures up. It has been nice in Ohio lately so I have had my car out almost every day. I was really surprised I made 9.2 pounds with the 2.95". I was thinking I would need to go with the a 2.75 or even 2.65" to get there since there is a lot more routing for my plumbing to the front mounted air to air IC. Also, I upgraded a few other parts when I put together my kit, you could consider this too if you havent already upgraded:
60lb injectors
Walboro in tank Fuel Pump
HKS bypass valve-vented to the atomosphere
large air to air intercooelr 32x12x4-just an ebay universal
ported MAF and Throttle Body and you can relocate your MAF as I mentioned to make it a blow through set up. I think this really helps because it is not restricting your air as it is being forced by your supercharger rather than being an obstruction right after the airbox and before the blower. Also if you get a better bypass valve than the cheap bosch one supplied in the kit and vent it to the atomosphere, it will help keep a lot of the hot air from recirculating back to your blower, which in my opinion is far more efficent. less heat=more power and lower IATS.
60lb injectors
Walboro in tank Fuel Pump
HKS bypass valve-vented to the atomosphere
large air to air intercooelr 32x12x4-just an ebay universal
ported MAF and Throttle Body and you can relocate your MAF as I mentioned to make it a blow through set up. I think this really helps because it is not restricting your air as it is being forced by your supercharger rather than being an obstruction right after the airbox and before the blower. Also if you get a better bypass valve than the cheap bosch one supplied in the kit and vent it to the atomosphere, it will help keep a lot of the hot air from recirculating back to your blower, which in my opinion is far more efficent. less heat=more power and lower IATS.
Teching In
Joined: Dec 2008
Posts: 27
Likes: 0
From: Warren, Ohio
LSpeed1,
I forgot I had uploaded a picture of my custom IC tubing after I purchased it from 2001WS6Vert. Here is a link. He fabbed it all up when he was running his t-trim on his car, then he sold it to me when he upgraded to a Ysi and went with an upgraded air to water IC from rmcr.
Heres the link to the picture of my IC tubing:https://ls1tech.com/forums/picture.p...ictureid=42559
I forgot I had uploaded a picture of my custom IC tubing after I purchased it from 2001WS6Vert. Here is a link. He fabbed it all up when he was running his t-trim on his car, then he sold it to me when he upgraded to a Ysi and went with an upgraded air to water IC from rmcr.
Heres the link to the picture of my IC tubing:https://ls1tech.com/forums/picture.p...ictureid=42559
Trending Topics
with what I have on the car my 7 pounds does,nt sound too far off.I am running speed density so there,s no restriction there. And a maxflow bypass.(Is there any way to make sure it,s working right) I found a place that has 2.50 pulleys but they,re $150 bucks.I,ll probably still get one
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo with what I have on the car my 7 pounds does,nt sound too far off.I am running speed density so there,s no restriction there. And a maxflow bypass.(Is there any way to make sure it,s working right) I found a place that has 2.50 pulleys but they,re $150 bucks.I,ll probably still get one
well there are alot of factors that need to be considered with how much boost your cars making like heads, cam, exhaust, altitude, and so on...
i bet your car still pulls hard though.....
Thanks. I made 484 rwhp and 452rwtq on a mustang dyno. I'd guess it be around 500 on the dynojet, since the mustang tends to read a little more accurate IMO. I just recently finished my install. I still have to get some pictures up. It has been nice in Ohio lately so I have had my car out almost every day. I was really surprised I made 9.2 pounds with the 2.95". I was thinking I would need to go with the a 2.75 or even 2.65" to get there since there is a lot more routing for my plumbing to the front mounted air to air IC. Also, I upgraded a few other parts when I put together my kit, you could consider this too if you havent already upgraded:
60lb injectors
Walboro in tank Fuel Pump
HKS bypass valve-vented to the atomosphere
large air to air intercooelr 32x12x4-just an ebay universal
ported MAF and Throttle Body and you can relocate your MAF as I mentioned to make it a blow through set up. I think this really helps because it is not restricting your air as it is being forced by your supercharger rather than being an obstruction right after the airbox and before the blower. Also if you get a better bypass valve than the cheap bosch one supplied in the kit and vent it to the atomosphere, it will help keep a lot of the hot air from recirculating back to your blower, which in my opinion is far more efficent. less heat=more power and lower IATS.
60lb injectors
Walboro in tank Fuel Pump
HKS bypass valve-vented to the atomosphere
large air to air intercooelr 32x12x4-just an ebay universal
ported MAF and Throttle Body and you can relocate your MAF as I mentioned to make it a blow through set up. I think this really helps because it is not restricting your air as it is being forced by your supercharger rather than being an obstruction right after the airbox and before the blower. Also if you get a better bypass valve than the cheap bosch one supplied in the kit and vent it to the atomosphere, it will help keep a lot of the hot air from recirculating back to your blower, which in my opinion is far more efficent. less heat=more power and lower IATS.
would anybody have any idea why I can only get about 7 pounds of boost ? thats with a 2.75 pulley.
Jim
Teching In
Joined: Dec 2008
Posts: 27
Likes: 0
From: Warren, Ohio
Im sure you will be very close if not at 500rwhp with your set-up after you get all the kinks worked out. I figured the 38lb injectors that came with the kit would basically be maxed out. The 60lb injectors are a great pick and they leave a lot of room to grow in the future. Let me know when you get some new numbers after you replace your pump to your aftercooler. Looking forward to hearing the results
Teching In
Joined: Dec 2008
Posts: 27
Likes: 0
From: Warren, Ohio
+1 to that Jim. I have heard a few guys mention they got belt slip when they went with the 2.5" pulley. I have heard guys that went with the 2.65" haven't had issues. Phatasp, there are also a lot of places around that i'm sure you could get a better deal on one of these pulleys than $150. I'll do a search and see if I come up with anything. Personally, I'd probably go to a 2.65" if I had your set-up, i'd be a little leary going any smaller. Just my 2 cents.
what kind of numbers are you putting down phatasp?
well there are alot of factors that need to be considered with how much boost your cars making like heads, cam, exhaust, altitude, and so on...
i bet your car still pulls hard though.....
My best so far has been 11.03@ 125 so of course I want a 10.anything
Any rubber dust behind the pulley or on the engine? I often suspect belt slip with numbers like yours. Going to a 2.5" is a stretch - belt slip is much easier on those tiny pullies, you might end up worse than you are now.
Jim
I checked did,nt really see anything, thats kind of why I thinking the bypass valve. the pulley I was looking at is supposed to be no slip, thats one reason
i was considering it.
this is the setup
well there are alot of factors that need to be considered with how much boost your cars making like heads, cam, exhaust, altitude, and so on...
i bet your car still pulls hard though.....
My best so far has been 11.03@ 125 so of course I want a 10.anything
Any rubber dust behind the pulley or on the engine? I often suspect belt slip with numbers like yours. Going to a 2.5" is a stretch - belt slip is much easier on those tiny pullies, you might end up worse than you are now.
Jim
I checked did,nt really see anything, thats kind of why I thinking the bypass valve. the pulley I was looking at is supposed to be no slip, thats one reason
i was considering it.
this is the setup
+1 to that Jim. I have heard a few guys mention they got belt slip when they went with the 2.5" pulley. I have heard guys that went with the 2.65" haven't had issues. Phatasp, there are also a lot of places around that i'm sure you could get a better deal on one of these pulleys than $150. I'll do a search and see if I come up with anything. Personally, I'd probably go to a 2.65" if I had your set-up, i'd be a little leary going any smaller. Just my 2 cents.
Staging Lane
Joined: May 2010
Posts: 86
Likes: 0
From: Harrisburg, PA
What happens to the computer if you relocate the MAF from the intake side to the charge side? Would it need re-tuned? Would it just be better to remove it and go with a SD tune?
Last edited by rjparth; Jun 8, 2010 at 06:27 PM.
Teching In
Joined: Dec 2008
Posts: 27
Likes: 0
From: Warren, Ohio
From what I've heard, it is alright to run your MAF for anything under 500rwhp, anything above go speed density. So it depends on what your set up is making. Also, I rely on my local speed shop to take care of all of my tuning (its a little over my head) I'd assume you'd want to re-tune just be on the safe side if you went either way. I intially set up my MAF blow through style then had my speed shop take care of all my tuning issues. If you are located anywhere in Ohio I could give you the name of my speed shop, they specialize in our LS series engines.
[QUOTE=transam151;13436618]Thanks. I made 484 rwhp and 452rwtq on a mustang dyno. I'd guess it be around 500 on the dynojet, since the mustang tends to read a little more accurate IMO. I just recently finished my install. I still have to get some pictures up. It has been nice in Ohio lately so I have had my car out almost every day. I was really surprised I made 9.2 pounds with the 2.95". I was thinking I would need to go with the a 2.75 or even 2.65" to get there since there is a lot more routing for my plumbing to the front mounted air to air IC. Also, I upgraded a few other parts when I put together my kit, you could consider this too if you havent already upgraded:
60lb injectors
Walboro in tank Fuel Pump
HKS bypass valve-vented to the atomosphere
large air to air intercooelr 32x12x4-just an ebay universal
ported MAF and Throttle Body and you can relocate your MAF as I mentioned to make it a blow through set up. I think this really helps because it is not restricting your air as it is being forced by your supercharger rather than being an obstruction right after the airbox and before the blower. Also if you get a better bypass valve than the cheap bosch one supplied in the kit and vent it to the atomosphere, it will help keep a lot of the hot air from recirculating back to your blower, which in my opinion is far more efficent. less heat=more power and lower IATS.[/Q
I know this is going to sound dumb, but you can ven,t the bypass to the atmosphere? then just cap the intake where it connects now?
60lb injectors
Walboro in tank Fuel Pump
HKS bypass valve-vented to the atomosphere
large air to air intercooelr 32x12x4-just an ebay universal
ported MAF and Throttle Body and you can relocate your MAF as I mentioned to make it a blow through set up. I think this really helps because it is not restricting your air as it is being forced by your supercharger rather than being an obstruction right after the airbox and before the blower. Also if you get a better bypass valve than the cheap bosch one supplied in the kit and vent it to the atomosphere, it will help keep a lot of the hot air from recirculating back to your blower, which in my opinion is far more efficent. less heat=more power and lower IATS.[/Q
I know this is going to sound dumb, but you can ven,t the bypass to the atmosphere? then just cap the intake where it connects now?
Teching In
Joined: Dec 2008
Posts: 27
Likes: 0
From: Warren, Ohio
[QUOTE=LSpeed1;13445302]yes, it is that easy to vent to the atomosphere. Good picture of your set up LSpeed1 for example. I have an HKS as well, works pretty good. Im going to have to get some pics up soon to show you guys my front mount IC set-up