I just had Specialty Z install my 2.85" supercharger pulley. My old numbers with the 9lb pulley were 541whp 440 torque @ 10 psi. My new numbers with the 2.85
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06-18-2018, 09:57 PM | #2401 (permalink) |
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I just had Specialty Z install my 2.85" supercharger pulley. My old numbers with the 9lb pulley were 541whp 440 torque @ 10 psi. My new numbers with the 2.85 pulley addition are 586whp 486 torque @ 12.86 psi.
https://www.instagram.com/p/BkMC8SyF...=1v0kruqzp88uj
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06-20-2018, 08:44 AM | #2402 (permalink) | |
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06-20-2018, 09:36 AM | #2403 (permalink) | |
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2 years ago if someone told you they made that power out of a centri blower on the 370z you would have been laughed at and ridiculed as being a liar. Winning! That car must be an animal
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ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM Last edited by TopgunZ; 06-20-2018 at 09:48 AM. |
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06-20-2018, 10:03 AM | #2404 (permalink) |
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Jackshaft is stock. If I was strictly running e85 I would have had the 3.47 jackshaft installed but I'm on flex fuel (91 octane). Seb had to dial back the timing on 91 as it is on 12.86 boost.
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06-20-2018, 10:31 AM | #2405 (permalink) | |
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If you look at the dyno sheet, the power drops completely off at about 6900rpm. I asked Seb about that and he said the throttle is staying open to redline but boost is dropping off. He thinks the air filter is restricting the air flow to the sc. Beyond installing the turbo guard screen is there anything that can be done to get more air flow? I'm assuming the stock stillen boot and filter more restrictive than the filter that's on it?
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06-20-2018, 10:42 AM | #2406 (permalink) |
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I would spray some CRC dressing on the serp belt and data log the boost for a few street pulls. Then spray the SC belt and data log. That way you can determine where the slip comes into affect. I dont think its the filter as there is no reason it would just choke out and stop breathing completely like in the chart. It would be gradual and hold more of a straight line than a plunge.
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06-20-2018, 11:17 AM | #2407 (permalink) | |
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06-20-2018, 01:48 PM | #2408 (permalink) | |
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I don't say that to knock anybody or anything, but to give you a data point if your street data looks different from your dyno data. I haven't been able to get on a dyno yet to see pressure there since I went to the 9lb pulley. The thing I have yet to do is use a thermal imager on the pulleys to see if any of them are heating up more than the others because of the frictional heat from belt slip (if that is the issue). If you have any questions with what I've done to ensure that the issue is not with the engine, I'll be happy to talk to you about it. I can also trade logs with you if you'd like just for comparison to see if we're seeing proportional and similar performance. Out of curiosity, if you don't mind, do you have the 928 bearings? |
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06-20-2018, 02:29 PM | #2409 (permalink) | |
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I checked and I have a lot of belt dust below/around the jackshaft pulley in the sc side so I'm definitely getting belt slippage. There is no belt dust around the sc pulley but the 2.85 I bought is a high traction. No belt dust anywhere on the serpentine side. I went ahead and ordered the high traction jackshaft pulley. Wondering if I should go ahead and change the sc belt also? I don't have the 928 bearings and I know the bearings could be living on borrowed time. Also, all of my logs were done on the dyno in SZ shop. I haven't done any data logging on the street. I made a little over 10psi with Si sc and 9lb pulley on the dyno.
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Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo 700+whp Last edited by redondoaveb; 06-20-2018 at 02:39 PM. Reason: Additional info |
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06-20-2018, 09:15 PM | #2410 (permalink) |
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This is all good info. Is anyone here running more than 1 breather filter on their PCV/crankcase vent hose? We ran into issues after tuning closed loop then going to open loop so I had to take it apart and look. Found that my 5/8 hose leading to crankcase vent was kinked trying to make the bend, so I put in a 3/4” brass elbow. Also cleaned and calibrated my wideband O2 (not yet wired to ecu) and downstreamo2 but don’t think that’s causing the issue.
Seb sent me this “Since you have breather filters on the larger 5\8 VC ports I suggest you put the PCVs on breather filters as well. One thing that occurs is since you have breather filters on the larger ports you've essentially created a vac leak with the intake manifold going to the PCVs.“ Any idea where he’s thinking? The only place i can think is putting another T and a filter right at the PCV valve.
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06-20-2018, 10:10 PM | #2411 (permalink) |
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Here's how Seb did mine. Pic is drivers side. Passenger side has hose running from pcv to rear of engine compartment and filter installed on end of hose. Couldn't get pic of that.
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06-20-2018, 10:39 PM | #2412 (permalink) | |
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Thanks for the help a big reason i wanted to do this was to learn my engine bay, and imma learn today!
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06-20-2018, 10:48 PM | #2413 (permalink) | |
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And when I was looking at mine I noticed the passenger side has a kink in it right after it exits the pcv valve.
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Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo 700+whp Last edited by redondoaveb; 06-20-2018 at 10:55 PM. |
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06-21-2018, 01:20 PM | #2414 (permalink) |
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So with the a2a kit, I understand that the PCV is removed. This means the combustion vapor (water/fuel) other stuff will stay in the engine and cause more sludge/deposits.
The PCV system ventilates the crankcase. Could this be a possible negative effect in the long run for the engine, or am I understanding something wrong? Anyone can shed some light on this? |
06-21-2018, 01:51 PM | #2415 (permalink) |
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No, its vented to atmosphere
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