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Unfortunately that will be finding out your engines Displacement, engine CC demand per RPM
Volumetric Efficency of engine per rpm and Supercharger Impeller efficency. Lots of math.
I did this a while back, easy for me my info is on his page about the efficency rate of the YSi. Estimated 23psi at 7k RPM (58k impeller speed which is 87/100 from max rate of the V7). Most CFM i will see with my pulley setup is calculated at 1394 at 7k.
For you with the V3 SCi + 928 Billet impeller, i would add 10-15 percent value per rpm since thats what They claim on their site as gains from the stock SCi impeller.
It does not take into account intercooler efficiency and restrictive piping/exhaust. This is why its an estimate. Hope the article helps.
Well i tried to do his math and i must of dcked something up. Uncorrected it said i should be making 32psi at 7400 spinning the blower at 59.7K. Thats with the extra 10% more air for the new impeller.
Well i tried to do his math and i must of dcked something up. Uncorrected it said i should be making 32psi at 7400 spinning the blower at 59.7K. Thats with the extra 10% more air for the new impeller.
Yea you did it wrong but too drunk to do math right now, i saw 15psi on that blower revving to 7100, 13.8psi at 6600rpm with the 3.12/34T/28T and fluidampr.
The impeller efficency wil be different from this article since you have a V3 SCi, find the compressor map for this trim and use the values from it in your equation.
Last edited by BluestreamDE; Dec 24, 2018 at 08:18 PM.
Did some preventive maintenance last night on the Z car, oil change, new Fleetrunner serpentine belt, cleaned the pulleys with a wire brush and some brake cleaner to remove caked up belt material. New NGK spark plugs gapped to .35. Checked my fuel pump and filter and saw no issues, filter still looks pretty good.
Decided to send off my 1600cc Injectors last week for cleaning and will be bringing them just incase the tuner wants to use em instead of my 2200's.
Pretty excited on the tune day next week. Not sure how much power i will make, but overall im stoked to see what she can do without headwork.
Last edited by BluestreamDE; Dec 29, 2018 at 03:03 AM.
Sounds like you have done plenty of preliminary work over the past few weeks and yeah, that would be exciting to have it heading for the tune process! Keep your fingers crossed and can't wait for the good news next week! *Try to get some sleep the night before hehe!
Arrived at National Speed a few hrs ago. Very cool facility here with well-knowledgable employees. Vlad is starting with his own base map with the PMAS maf sensor instead of the GT Maf just in case we run out of resolution. Main concern is spark blowout and fueling, if there is blowout, ive given them the ok to regap the plugs and continue. Hoping for the best.
How much boost do you anticipate? .035 isn’t too bad ... I dropped down to .025 - .027 and I was ok.
in for results!!
Not sure. I calculated 23psi according to the site formula i posted above. I am trying not to keep my hopes up or i may let myself down with unmet expectations. Ill be sure to post up the results, if any lol.
(250 base horsepower) + (20hp per psi x 23 psi) = 710whp …
patiently waiting...
Might be a but different for a supercharger with parasitic loss.
Well bad news, While Vlad was taking care of the fuel trims my cog belt snapped in half, and i failed to bring an extra with me. I paid for the time i spent here but will need to return to finish the tune on the 31st, good news is that i wont be needing to wait long, i will be pullying down to the 2.87 pulley as well, Vlad said i am not spinning the blower hard enough.
I will type up a thorough responce later, getting rdy for the 3 hr drive back home. All is not lost, i am staying on course!
Last edited by BluestreamDE; Jan 3, 2019 at 02:26 PM.
Yea i know Aboodi was fighting with belts with his Z as well. The YSi is a hard, harsh blower to spin. V8 guys all use 8 rib or even 10 rib pulleys for max durability and grip. And since im still on 6 rib for now, i will be fighting this alot more.
So to summerize, there was 8 total pulls. All with low timing, and All the runs were short, only revving up to 4-4800rpm. Light and partial load was finished beforehand.
i was almost at 400whp just before 5k rpm on run 6 of 8. Mind you this is with Vlad still making fuel adjustments only and low low timing, and with 2100 more rpm to spare! So i am happy about that. Once timing is advanced, more power will be made especially with e85 helping.
Glad i went with no expectations. Now its just a matter of fixing my weak areas on this car and head back for round 2! 👍
I went ahead and gapped all my NGK plugs to .025 and swapped my serpentine pulley. After a quick measure though, i realised that the outer diameter is 2.87 but in fact the inner diameter is actually around 2.6. This pulley came with the Used YSi kit and i didnt think anything of it at first. Not the standard pulley you usually see with Vortech, it may be a 2.62 or 2.64 from what i could measure with my ruler. Either way more powa.
Definitly an difference with the loudness of the Tial Q on startup. Waay more bypassed air at idle. And running a 78 inch generic Gates belt until i pick up a Fleetrunner belt with the same length.
Might be a but different for a supercharger with parasitic loss.
Well bad news, While Vlad was taking care of the fuel trims my cog belt snapped in half, and i failed to bring an extra with me. I paid for the time i spent here but will need to return to finish the tune on the 31st, good news is that i wont be needing to wait long, i will be pullying down to the 2.87 pulley as well, Vlad said i am not spinning the blower hard enough.
I will type up a thorough responce later, getting rdy for the 3 hr drive back home. All is not lost, i am staying on course!
