Ysi pulley combination and boost level
Thread Starter
Racer
Joined: Jun 2016
Posts: 273
Likes: 11
Ysi pulley combination and boost level
Built short block, stock lt1 heads. Lt4 injectors, hpfp and cpr low side. As of now on 3.4 upper pulley and 8.25 lower I am seeing 10.5 pounds and 12.5 pounds with no filter. My goal is to get into mid to high 900s with this setup on 93 and meth. I was suggested to go with 3.0 crossed slotted pulley from A&A since I am still on 8 rib setup for now. My question is will 3.0 upper will be good enough to achieve my goals? Eventually I will go with 10 rib setup.
Thread Starter
Racer
Joined: Jun 2016
Posts: 273
Likes: 11
belt slip is the issue I am trying to stay 3.0 and up. I went to griptechs website and looks like they only sell 2.95 for vortech or 3.8. Can they make one for us if we order ahead of time?
Le Mans Master
Joined: Mar 2010
Posts: 7,052
Likes: 945
From: DFW TX
I ran the 2.93 upper and see around 20-21 psi. I do run the 10 rib though. I am running the 2200X though...Although it is the YSI-B not sure if ECS develops different size pulleys for it. I got the 2.93 and the 3.25 and the 2.75 when I bought the blower from them. All in 10 rib, but that shouldn't matter when it comes to the pulley size options,
All you need is the 3.25 probably to achieve your 900 wheel goal. You should see 16-18 with the 3.25 upper. You should be fine with 8 rib and that upper.
All you need is the 3.25 probably to achieve your 900 wheel goal. You should see 16-18 with the 3.25 upper. You should be fine with 8 rib and that upper.
Last edited by C7&7; Jul 31, 2018 at 11:58 AM.
Thread Starter
Racer
Joined: Jun 2016
Posts: 273
Likes: 11
I ran the 2.93 upper and see around 20-21 psi. I do run the 10 rib though. I am running the 2200X though...Although it is the YSI-B not sure if ECS develops different size pulleys for it. I got the 2.93 and the 3.25 and the 2.75 when I bought the blower from them. All in 10 rib, but that shouldn't matter when it comes to the pulley size options,
All you need is the 3.25 probably to achieve your 900 wheel goal. You should see 16-18 with the 3.25 upper. You should be fine with 8 rib and that upper.
All you need is the 3.25 probably to achieve your 900 wheel goal. You should see 16-18 with the 3.25 upper. You should be fine with 8 rib and that upper.
Team Owner
Joined: Jan 2007
Posts: 29,065
Likes: 1,839
From: cookeville tennessee
I ran the 2.93 upper and see around 20-21 psi. I do run the 10 rib though. I am running the 2200X though...Although it is the YSI-B not sure if ECS develops different size pulleys for it. I got the 2.93 and the 3.25 and the 2.75 when I bought the blower from them. All in 10 rib, but that shouldn't matter when it comes to the pulley size options,
All you need is the 3.25 probably to achieve your 900 wheel goal. You should see 16-18 with the 3.25 upper. You should be fine with 8 rib and that upper.
All you need is the 3.25 probably to achieve your 900 wheel goal. You should see 16-18 with the 3.25 upper. You should be fine with 8 rib and that upper.
Drifting
Joined: Aug 2008
Posts: 1,399
Likes: 30
With a 3" / 8.25" pulley you'll be pushing 64,515 rpm on the blower near 6800 rpms. That's ~97% of the max rpm rated by Vortech (it can go higher though). That should be enough to make 900rwhp
Last edited by ysb02; Jul 31, 2018 at 04:55 PM.
Thread Starter
Racer
Joined: Jun 2016
Posts: 273
Likes: 11
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Le Mans Master
Joined: Mar 2010
Posts: 7,052
Likes: 945
From: DFW TX
Thread Starter
Racer
Joined: Jun 2016
Posts: 273
Likes: 11
nice numbers and thanks for the input fellas. I am just waiting for this texas 100+ degree weather to cool down to make a move and pulley this sucker down.
Last edited by 3honkz; Jul 31, 2018 at 05:58 PM.
Burning Brakes
Joined: Nov 2015
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From: Kuwait
Racer
Joined: May 2017
Posts: 495
Likes: 51
From: Woodlands Texas
Hope nobody minds if i jump in but i was getting ready to ask about my setup.
I have a V7 YSi coming with a stock diameter crank and a 3.6 upper. I am trying to keep it between 700-800 crank HP (old school) for now. My bottom end is billet forged but my clutch, tube and axles are still stock. I have a pretty radical cam already with longtubes and am going to try to mod my araid if i can, no meth yet.
Question is, should i be worried about slippage on an 8 rib and will i be close to those numbers. I was told by a questionable source that it might actually be difficult to get below 750 with that setup.
I have a V7 YSi coming with a stock diameter crank and a 3.6 upper. I am trying to keep it between 700-800 crank HP (old school) for now. My bottom end is billet forged but my clutch, tube and axles are still stock. I have a pretty radical cam already with longtubes and am going to try to mod my araid if i can, no meth yet.
Question is, should i be worried about slippage on an 8 rib and will i be close to those numbers. I was told by a questionable source that it might actually be difficult to get below 750 with that setup.
Le Mans Master
Joined: Mar 2010
Posts: 7,052
Likes: 945
From: DFW TX
Hope nobody minds if i jump in but i was getting ready to ask about my setup.
I have a V7 YSi coming with a stock diameter crank and a 3.6 upper. I am trying to keep it between 700-800 crank HP (old school) for now. My bottom end is billet forged but my clutch, tube and axles are still stock. I have a pretty radical cam already with longtubes and am going to try to mod my araid if i can, no meth yet.
Question is, should i be worried about slippage on an 8 rib and will i be close to those numbers. I was told by a questionable source that it might actually be difficult to get below 750 with that setup.
I have a V7 YSi coming with a stock diameter crank and a 3.6 upper. I am trying to keep it between 700-800 crank HP (old school) for now. My bottom end is billet forged but my clutch, tube and axles are still stock. I have a pretty radical cam already with longtubes and am going to try to mod my araid if i can, no meth yet.
Question is, should i be worried about slippage on an 8 rib and will i be close to those numbers. I was told by a questionable source that it might actually be difficult to get below 750 with that setup.
Drifting
Joined: Aug 2008
Posts: 1,399
Likes: 30
With a 4" pulley, 10% OD crank pulley I got slightly over 600rwhp on a ls6 w/ long tubes. A 3.6" with a LT1/4 should be ~750. A 3.8" would be ~700-725 probably.
I don't have exp with the c7 drive but 3.6 upper / stock crank shouldn't be in the danger zone for slip at all. Once you get closer to 3" upper you probably should start to worry about it.
I don't have exp with the c7 drive but 3.6 upper / stock crank shouldn't be in the danger zone for slip at all. Once you get closer to 3" upper you probably should start to worry about it.
Racer
Joined: May 2017
Posts: 495
Likes: 51
From: Woodlands Texas
I'm just worried about breakage until i get better driveline parts. Probably end up going conservative with the timing and torque settings to pull spark for the time being if i start getting near 800..