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DRR Pro |
This is for information purposes only & my newbie experience with bracket racing a ProCharger! I've got 63 passes on this supercharger combo. With a good many round wins; I'm definitely not disappointed with choosing this set-up. Now, lets get on to the drive belts. Everyone, including ProCharger said I needed a cogged belt drive system. While I have no experience with a cog belt. I understand the supercharger head unit doesn't like drastic rpm changes, hard on the head unit. I like ripping the throttle playing the game on the back half. So, I decided on a 12-rib drive belt for some slippage while ripping. Now, I didn't have an issue with the Gates RPM belt I started with; one of the better grip belts out there. I was going to order another, but ProCharger didn't have one in stock. So, I went with their standard grip belt & broke it in as recommended. Anyway, I ran it this past weekend & the car ran the quickest/fastest it has been. But it didn't feel right between 6,000 & 7,100 rpm, it was flat or laying over. The 1st thing I started checking was the plugs, nothing alarming. I made 13 passes with no problems, other than it didn't feel right. It made the semifinals this weekend! Today, I found out what was going on after looking at 2 or 3 data logs. The boost is staying the same from 6,000-7,100 instead of climbing like the higher grip belt does. Regardless, it has exceeded my expectations for the local bracket slow tune I wanted. Plus, well on the way to the quicker tune I wanted for the Big $$$ races. I only have one more race weekend to finalize a tune I want to use for the Spring Fling Million. If all else fails, I'll switch back to the mid 5.90 winning tune I used in the fall of 2022. 2BKING needs to get another Gates RPM belt ordered for back-up! 1980 Camaro Taking the Best Working Small Tire Shyt Box & making it Greater Than Before! 3000 lbs. Pump Gas 436 | ||
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DRR Sportsman |
I have a cog system on my F1r blower and rip the gas all the time and put over 300 runs on it with no issues | |||
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DRR Sportsman |
Side Slinger F1R cog system and I rip away. Id bet its slipping with the 12 rib drive belt up in the higher rpm range. | |||
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DRR Pro |
This standard belt maintained 9 lbs. from 6,000 - 7,100 & the car was consistent. I'm putting the RPM belt back on for the next races, that has shown no signs of slippage at higher rpm. Regardless, I'm not trying to set the world on fire with this combination & it's very consistent with either belt. Here's a run from this past weekend during our local points series. I wanted a 9.20 - 9.40 tune for the local stuff & I got that with the standard belt. The other tune, I'm working on is an 8.70 - 8.90 tune for the bigger $$$ races. I will use the softer compound RPM belt for that tune. Thanks for the information, it's appreciated! 2BKING 1980 Camaro Taking the Best Working Small Tire Shyt Box & making it Greater Than Before! 3000 lbs. Pump Gas 436 | |||
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DRR Trophy |
I’d order a few and probably change as normal service after so many runs but congrats on sucsess with new package | |||
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DRR Pro |
Thanks Top! I have 2 standard belts, but I know they are limited to 9 lbs. of boost! The time slip posted above, I got out of the throttle past the 1000'. It has ran quicker/faster & has been 145 mph with the standard belt. The good belt, I've made 15 lbs. of boost & I only have one of them right now. Yes, the new combo is going rounds & collecting checks. The ProCharger is really being restricted, by my B...astardized tuning with the EFI. While I'm pretty happy with the tune, but there's so much more I have to learn. 2BKING 1980 Camaro Taking the Best Working Small Tire Shyt Box & making it Greater Than Before! 3000 lbs. Pump Gas 436 | |||
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DRR Trophy |
Poking my head in here for information. I'm running a 12-rib setup with an F1A. 7.65 lower , tested on a 4.00 and 3.75 upper on Saturday 7.65 & 4.00 is 191% over (61,900 RPM @ 6,000) 7.65 & 3.75 is 204% over (66,100 RPM @ 6,000) 4.00 pulley: --60: 1.765 -330: 4.989 -660: 7.696 @ 91.37 1000: 10.024 1320: 11.987 @ 115.07 3.75 pulley: --60: 1.664 -330: 4.783 -660: 7.428 @ 93.08 1000: 9.720 1320: 11.669 @ 115.59 What's weird is how much the pulley picked up down low, but the MPH hardly changed. We do know it's very fat at the top end (0.626 lambda with the 3.75 pulley) and might be laying over from that. I'm also running a 5" x 6" round K&N filter on the inlet, and an A2A Intercooler with 3" piping. But other than that, I'm wondering if I might be running into belt slip? I'm running a Gates FleetRunner K120786HD (3622MX). For reference, this is on a 408 SB Mopar weighing 4,450 pounds. Powerglide with a 1.98, 4.10's out back on a 28x10 M/T DOT Radial Pro tire. Time , erpm1 , erpm2 , erpmdiff , drpm1 , drpm2 , drpmdiff , kpa1 , kpa2 , kpadiff _0.1 , _2777 , _2945 , __168___ , ___19 , ___19 , ____0___ , _103 , _115 , __12 _0.5 , _3758 , _4071 , __313___ , __436 , __627 , __191___ , _120 , _128 , ___8 _1.1 , _4039 , _4377 , __338___ , _1062 , _1288 , __226___ , _123 , _132 , ___9 _1.8 , _4606 , _4954 , __348___ , _1708 , _1973 , __265___ , _128 , _140 , __12 _2.0 , _4778 , _5022 , __244___ , _1905 , _2252 , __347___ , _130 , _143 , __13 _3.1 , _4352 , _4605 , __253___ , _2619 , _2831 , __212___ , _127 , _136 , ___9 _4.1 , _4571 , _4803 , __232___ , _3089 , _3336 , __247___ , _129 , _139 , __10 _4.8 , _4762 , _4940 , __178___ , _3445 , _3696 , __251___ , _131 , _141 , ___9 _5.8 , _4961 , _5089 , __128___ , _3869 , _4101 , __232___ , _133 , _143 , __10 _6.8 , _5098 , _5238 , __140___ , _4261 , _4484 , __223___ , _136 , _145 , ___9 _7.5 , _5221 , _5347 , __126___ , _4499 , _4713 , __214___ , _137 , _147 , __10 _8.5 , _5341 , _5471 , __130___ , _4820 , _5026 , __206___ , _139 , _148 , ___9 _9.9 , _5584 , _5700 , __116___ , _5229 , _5398 , __169___ , _142 , _151 , ___9 10.5 , _5694 , _5813 , __119___ , _5375 , _5517 , __142___ , _143 , _153 , __10 11.7 , _5937 , _5986 , ___49___ , _5642 , _5745 , __103___ , _146 , _154 , ___8 12.0 , _5987 , _6019 , ___32___ , _5712 , _5798 , ___86___ , _147 , _155 , ___8 12.3 , _6040 , _6108 , ___68___ , _5786 , _5872 , ___86___ , _148 , _155 , ___7 | |||
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DRR Pro |
I'm a rookie at this ProCharger/EFI deal. I'll try & post some comments on your combination tomorrow, along with some more information on my combo also. 2BKING 1980 Camaro Taking the Best Working Small Tire Shyt Box & making it Greater Than Before! 3000 lbs. Pump Gas 436 | |||
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DRR Trophy |
This is what my combo looks like. Figure I have about 12" of belt contact on the crank and at least 7.5-8" on the blower pulley. The 4150 intake was hogged out on a friend's bridgeport to fit a 4500 throttle body; the piping between the A2A and hat progressively steps from 3" to 5". Thus, generally speaking the induction is very free-flowing and high-volume. As a result, I'm moving more CFM at less boost - so the numbers can also be considered skewed in that manner as well. It's just so odd that the MPH didn't pick up. https://photos.app.goo.gl/UaJtmmepWmp6edwG6 https://photos.app.goo.gl/czxtBq5EaGUdvcHw5 https://photos.app.goo.gl/LTMotnUoDyPLYNfy6 | |||
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DRR S/Pro |
The fact that MPH is calculated in the 66' between the mph cones and finish line shows that your combination isn't changing how long it takes to travel that last distance. In other words your HP level is just about the same at that point with the two different combinations. ____________________________ 2017 and 2018 Osage Casinos Tulsa Raceway Park No-Box Champion 2018 Div4 Goodguys Hammer award winner | |||
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DRR Top Comp |
Sounds to me like you answered your own question. If it will slip when ripping throttle it will slip under power and any slippage will cause power loss and inconsistency. https://postimg.cc/gallery/np3zpruo/ "Dunning-Kruger Effect" -a type of Cognitive bias where people with little expertise or ability assume they have superior expertise or ability. This overestimation occurs as a result of the fact that they do not have enough knowledge to know they don't have enough knowledge. Before you argue with someone ask yourself, "Is this person mentally mature enough to grasp the concept of a different perspective?" If not there is no point to argue. 4X NE2 CHAMPION. 2020 TDRA NE2 Champion | |||
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DRR Pro |
I just have a couple observations/comments on a couple of areas. Belt: I've never ran the fleetrunner/green belt, but from my research that belt has the most grip of the 3 or 4 belts ProCharger recommends. The downside is it has the most stretch. You might be running outside of tensioner range when it stretches & with that long belt; I would be looking there. A camera mounted on your radiator support would give you some data on what the tensioner is doing. Another option is to try using a Gates RPM belt, good grip minimal stretch. Pulleys: I've never heard of the stock ProCharger crank pulley causing belt slip. Now, when you get around the 4" & under pulley dia. on the supercharger pulley it starts becoming an issue. Belt tension & pulley wrap becomes a big player. What was your Lambda reading up top with the 4" pulley? 2BKING 1980 Camaro Taking the Best Working Small Tire Shyt Box & making it Greater Than Before! 3000 lbs. Pump Gas 436 | |||
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DRR Pro |
I'm sure you've watched this vid from ProCharger, but just in case you haven't; it's the basics! https://www.procharger.com/vid...d-tension-your-belt/ 1980 Camaro Taking the Best Working Small Tire Shyt Box & making it Greater Than Before! 3000 lbs. Pump Gas 436 | |||
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DRR Trophy |
I was running a Dayco 78.8 belt and actually shredded it when ripping the throttle - the tensioner took up the slack until the belt rubbed the base of the tensioner. The green belt has no marks, so it hasn't made contact yet. In static position I have the tensioner at almost full rotation with the 4" pulley - about 1/4" left. Just enough to be able to loosen it to pull the belt off. So just a little more with the 3.75 . The 78.6 (78.625") green belt is actually about 1/2" shorter than the Dayco 78.8 belt I had (79.125). | |||
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DRR Pro |
So, what's your plan going forward? Here's our mockup with the spare motor, not that it's going to help with your situation. If we don't run the idler pulley closest to the crank pulley. The belt will rub on the base of the tensioner & comes really close to the water pump motor. I think this was taken with our 4.75" pulley & we have our 4.25" pulley on now. 1980 Camaro Taking the Best Working Small Tire Shyt Box & making it Greater Than Before! 3000 lbs. Pump Gas 436 | |||
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DRR Trophy |
I don't have the room for the ProCharger style tensioner - with it being 1/2" thick, I'd have to build a whole new crank hub to space everything out 1/2". I don't like how they mill the plate down to fit the tensioner in. Right now I have about 1/4" between the belt and the 1/2" aluminum plate. Given the information available, I don't think the belt is slipping then, even with the 50% wrap on the crankshaft. I checked my backlog emails, the tensioner is a Dayco 89453 for a 2003-2004 Freightliner. No spec on the spring rate. | |||
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