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Most HP, Fastest ET with YSi?

Most HP, Fastest ET with YSi?

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02-26-2004, 12:31 PM
HazMat

Most HP, Fastest ET with YSi?

O.K guys. What is the most HP/TQ that has been made with a new YSi? What was the combination? What is the best ET/MPH? With what combo? :rolleyes:

I made 645hp/696tq on a 302 with 27 psi air-to-water IC (27/77 cog) (6800rpm engine)through a powerglide. The AF was 12.0 to 12.5 (lean)The peak tq was before or right at 4000rpm. Timing was only 17 and air charge temp was 65. I was still running a Mass Air Meter ( which was not cal for the big blower ) with a PMS and injectors that were toooooooooooo small. I am anticipating making more with the same combo but now with a FAST seq and 96's.

Then i am going to put in the new 345, new heads, new cam and try it again.

Let's hear them!
02-29-2004, 10:04 AM
Samfrus

8.89 @152.47 NMRA Ren. legal trim

Pat@swillracing.com
02-29-2004, 04:59 PM
HazMat

Yeah, That's what i'm talking about! Thanks for posting Pat. That is awsome.
Just imagine if that was not Ren. Trim, a short runner intake and air to water IC.
02-29-2004, 08:23 PM
Samfrus

We kick that kinda stuff around all the time. If our bugs ever get all worked out we may start to experiment with that kind of stuff.
03-01-2004, 05:00 PM
HazMat

I'll keep you updated on my progress. We might be able to help each other out. I know what you mean about those damn bugs!
03-14-2004, 09:47 AM
no name bandit

Bob Kurgan just went 8.70 @156 testing in bradeton thursday night
03-16-2004, 08:27 PM
HazMat

Hell yeah! Thats not bad for what is supposed to be a street blower. I hope i can get something close to that.
03-17-2004, 07:56 PM
flyin_hawaiin

and..

ive also gone 8.96 @ 159.8 in a camaro that i drive and tune.. It has a YSi on it and weighs 3420 with driver.. The car is owned by Chris Sikora..

thanks bob kurgan
03-21-2004, 01:52 PM
HazMat

Well from what i am hearing it sounds like the YSi is a good high 8 sec blower. With the right setup and tune of course.

Thanks for the replies.
05-10-2004, 12:10 PM
BLOWNBY

What type of torque curve with YSi

Those of you with the YSi now, what did you have before. I had an S- trim, before the YSi, and i had a lot more low end torque. 150-200 ftlbs at 3500 RPM and under. After 4500RPM the YSi is ahead. The YSI ended up with about 100 more ft lbs and 130 more rwhp at 6,000 rpm.

560rwtq/631rwhp -- YSI 460rwtq/501rwhp --S-trim

8"/3"pulleys 6200 RPM shift 6.87"/2.95"pulleys 6,000 RPM shift

So far my preliminary runs have showed no improvement in the 1/8 mile time,increase mph only, but the mph in the 1/4 went up 4 mph and et down a little more than a tenth so far. Also switched my 26X10 slick for Hoosier QTP 27x11.5. That may have a little to do with the lower increase et, but not much. No traction issue. Awesome tires.

But with all that extra power times should have gone down a little more
Looks like the lack of low end torque is hurting.

I will be switching my 3 inch sc pulley to a RR 2.7. the one day on the street it seemed to make a big difference.

I will retune and see what happens

Any input. Basically are you seeing loss of low end torque like me or what.
05-10-2004, 05:25 PM
HazMat

What are you launching at? If your car can handle it try to lauch at a higher rpm to take advantage of the shift in your torque curve.
I have had an s-trim, y and ysi. the ysi has made the most hp and torque but yes the torque does come in later than the s.
Also by going to a larger diameter tire you are now crossing the 1/4 mile at a lower rpm.
My peak torque was between 4000-4500rpm with my ysi.
05-10-2004, 09:41 PM
renegade352

I am going to be putting out some big numbers with my YSi here soon, hopefully. I'm crossing my fingers for 700 RWHP on pump gas, and some 145 MPH traps.
05-12-2004, 06:51 PM
HazMat

ren352..sounds like a nice combo. What are you using for tunning? FAST, PMS, etc? Are you going to use an air-to-water or air-to-air? How much boost are you going to run?
Our combo's are going to be close. I just pulled out my 302 and am putting in a 345 w/TEA ported Vic Jr.s and custom solid roller.
Good luck and keep us posted. I will do the same.

Last Friday i went 9.9 @ 132 with the blower belt shreading apart a little after the 1/8 mile. 1/8 was 6.3 @ 111mph, 60' was a 1.4 Race weight is 3445 pounds. The FAST data-log showed the tune was a fat 10.0-10.5 to 1. This was only the fourth pass with this new setup. We are going to try a bigger blower pulley and possibly 50mm cog pulleys on the 345. Maybe this will solve the problem.
05-13-2004, 11:51 PM
Greg D
05-14-2004, 04:43 PM
hotford

to big for me

just looking in on you big boys,referance to the s-trim combo,my 82 gt with a preped bottom end and (yes) stock heads ported,e-cam,cobra intake,s-trim (17 psi) and a powercooler,made 565rwhp,587rwtq.hp was at 5300rpm and torque was at 4700 rpm,not bad for a stump puller,oh ya the car weights,3230 with driver,hooks 137 60fts and runs 1030;s @ 133mph ,with bad shifting trust me my mom can shift better than me ,looking to put a auto in hopefully the car picks up et.
05-15-2004, 07:09 AM
RdRunnr

Does anyone happen to have numbers for what they made power wise or ran et wise with the ys vs the ysi if nothing else changed?
05-16-2004, 11:44 AM
HazMat

I talked to Brian Anderson ( he used to run renegade ) when i first got my ysi and he said on the dyno, on his car, the ysi was making atleast 50+ hp throughout the power band than the ys. He did notgive me any ET.
05-19-2004, 07:49 PM
renegade352

Quote:

Originally Posted by HazMat

ren352..sounds like a nice combo. What are you using for tunning? FAST, PMS, etc? Are you going to use an air-to-water or air-to-air? How much boost are you going to run?
Our combo's are going to be close. I just pulled out my 302 and am putting in a 345 w/TEA ported Vic Jr.s and custom solid roller.
Good luck and keep us posted. I will do the same.

I am using an AEM EMS, dual intank walbros with a KB boostapump if I ever need it, and a giant air-to-air cooler. I am hoping to run around 20 pounds of boost on pump gas with my low compression (7.2:1) and then spin the YSi as hard as it will go and try to max it out on C16 :D My brackets came in on Monday, and I got it running late last night (I still have to plumb the cooler though) and it sounds great. I am running a passenger side straight discharge YSI, car still has A/C and P/S.
05-20-2004, 08:51 PM
HazMat

352...

That sure is a very low compression. I ran 8.6 on my 302 and am running 8.5 on my 345. I was spinning the ysi to about 66, 000-67,000 rpm which is just above advertised absolute max of 65,000. I was seeing 27psi after the air-to-water. I think you are pushing it with 20 psi on pump gas. Just my opinion but i think you would be happier with a little higher compression. Remember, it's going take a bit of HP to get that ysi going. Heck most of the turbo guys run atleast 8.0:1. Some of the guys running renegade are running 9 or 9.5:1. I am very interested to hear how it goes. Please keep us posted.
05-20-2004, 10:43 PM
itlkick

Quote:

Originally Posted by RdRunnr

Does anyone happen to have numbers for what they made power wise or ran et wise with the ys vs the ysi if nothing else changed?

Back to back from the YS to the YSi (same pullies) I dropped around 15 lb/ft of torque at 3,000 RPM and gained around 50 HP at 6,800 RPM. I have not spun my YSi at full speed yet but made the same power with a larger supercharger pulley.
05-21-2004, 02:39 PM
HazMat

Quote:

Originally Posted by itlkick

Back to back from the YS to the YSi (same pullies) I dropped around 15 lb/ft of torque at 3,000 RPM and gained around 50 HP at 6,800 RPM. I have not spun my YSi at full speed yet but made the same power with a larger supercharger pulley.

how did your tq #'s compare?
05-21-2004, 03:17 PM
itlkick

Quote:

Originally Posted by HazMat

how did your tq #'s compare?

horsepower = (torque * RPM ) / 5252 so at 6,800 RPM if my HP was up by 50 then torque would be up by:

Torque = ( horsepower * 5252 ) / RPM or
38.6 = ( 50 * 5252) / 6800

So torque was up by 38.6 lb/ft at 6,800 RPM.

Alternativly since my torque was down by 15 at 3000 RPM you can see that power was down (at 3,000 RPM) by 8.5 HP.

8.5 = (15 * 3000) / 5252.

So - the power comes in a little later with the same size pullies (but by a small margin) and then power climbs in a strong curve throughout the entire power range (over the YS).

Sorry about the math - I don't have my dyno sheet here so it was the only way to figure it out.....
05-21-2004, 09:55 PM
RdRunnr

Damn you guys have me thinking about the upgrade :)
05-21-2004, 10:50 PM
HazMat

Don't hesitate....it is worth it.

But, i am getting rid of mine and am going to a 91mm turbo....tired of playing around!
05-22-2004, 11:17 AM
YSiGonzo

As far as peak numbers I am making 851 rwhp and 675 ft lbs. The hp peak is at 6800 and torque peaked at about 6400. This is with a 73 tooth crank and 28 tooth blower cog pulleys. I did the upgrade. I made 655 on pump gas with the YS and 743 rwhp (YSi) with the same tune. There was also a meter upgrade in there so I dont know exactly where the power increase is broken down. I then upgraded from the PMS to FAST and bigger injectors and made the 851. The tune up has me at 22 degrees timing from about 6200 up and air fuel at 10.8:1 with C-16. It is a safe tune up as this is a street car. My best e.t. so far is 9.64 and best mph is only 144. This is a heavy street car and I'm still dialing in the suspension. I'm sure those numbers will go way down with some seat time. I am hoping to bust an 8.99 or better by the end of this year. The upgrade is worth it in my opinion. Or you could just sell the YS head unit and buy the new YSi. Either way Good luck and you wont be disappointed with the YSi.
05-22-2004, 08:19 PM
renegade352

Quote:

Originally Posted by YSiGonzo

As far as peak numbers I am making 851 rwhp and 675 ft lbs. The hp peak is at 6800 and torque peaked at about 6400. This is with a 73 tooth crank and 28 tooth blower cog pulleys. I did the upgrade. I made 655 on pump gas with the YS and 743 rwhp (YSi) with the same tune. There was also a meter upgrade in there so I dont know exactly where the power increase is broken down. I then upgraded from the PMS to FAST and bigger injectors and made the 851. The tune up has me at 22 degrees timing from about 6200 up and air fuel at 10.8:1 with C-16. It is a safe tune up as this is a street car. My best e.t. so far is 9.64 and best mph is only 144. This is a heavy street car and I'm still dialing in the suspension. I'm sure those numbers will go way down with some seat time. I am hoping to bust an 8.99 or better by the end of this year. The upgrade is worth it in my opinion. Or you could just sell the YS head unit and buy the new YSi. Either way Good luck and you wont be disappointed with the YSi.

Gonzo, i'd like to know more about your setup. Wheny ou say you made 655 on pump gas with the YS and 743 with the YSi on the same tune, did you do 743 with the YSi on pump gas? What is the CID of your motor, static compression, what kind of pump gas do you get, and is it intercooled? Thanks a lot.
05-22-2004, 08:45 PM
YSiGonzo

Quote:

Originally Posted by renegade352

Gonzo, i'd like to know more about your setup. Wheny ou say you made 655 on pump gas with the YS and 743 with the YSi on the same tune, did you do 743 with the YSi on pump gas? What is the CID of your motor, static compression, what kind of pump gas do you get, and is it intercooled? Thanks a lot.

Everything was the same. I had a custom chip and was just interested if the upgrade was worth it. Like I said I put a bigger meter (went from Pro-M 80 to a 92) and ran it just like that. I did add 10 lbs of fuel pressure to keep it from going lean. It made 2 more pounds of boost on my Autometer guage. That was with Sunoco 94 premium nothing else. It's an R based 331 static compression is 8.4:1. That was non intercooled and it still is with my current setup and numbers but with C-16 now. I'm spinning the blower now right around 64,000 rpm's or close to max. Keep in mind I run a huge solid roller cam so it's nowhere near NMRA renegade spec. Also I am running a Victor 5.0 intake which I believe would not be legal. Good luck!!!

Here is my latest dyno pull.

http://www.superchargerhelp.com/phot...dynoresize.jpg
05-22-2004, 10:07 PM
itlkick

I found my dyno sheet from earlier when I was running the 73 / 30 tooth combination. It is interesting to see the differences between our two dyno graphs considering the same supercharger. We also have similar cog setups (yours is a little more aggressive). I bet the difference is in the cam...

http://www.superstang.com/dyno/pumpgasdyno640.jpg
05-22-2004, 10:18 PM
YSiGonzo

That is weird. The intake might have something to do as well. I dont know your combo. Man you were LEAN on that first pull. Even the second one was kinda up there. Mine is at 10.8:1 from about 6000 up and 11.3 or fatter below that. Good luck!!!
05-22-2004, 10:36 PM
itlkick

Quote:

Originally Posted by YSiGonzo

That is weird. The intake might have something to do as well. I dont know your combo. Man you were LEAN on that first pull. Even the second one was kinda up there. Mine is at 10.8:1 from about 6000 up and 11.3 or fatter below that. Good luck!!!

Yes, it was lean - that is why I left it on the chart when I had it printed. The run that was fatter was actually on 92 octane for the Pump Gas Drags (Hot Rod Magazine). Normally I run a little leaner (but not as lean as the lean run on the chart). I normally select my fuel grade and keep adding fuel (on the dyno) until power drops, as long as it is below 12.5:1 (on good gas) I leave it there. I don't agree with all the talk about needing to be at 10.x:!. I just pulled my engine to go through it after around 10,000 miles and over 200 dyno pulls and it looked perfect inside - no signs of bearing wear or detonation (reading the rod bearings). Just my opinion...

I should also point out that I did blow a headgasket at the Pump Gas Drags (on 92 octane). I don't think it was because the car was too lean but hey - I could be wrong!
05-22-2004, 10:47 PM
tokes

So Gonzo, how much boost were you seeing when you made 743 on pump gas? Thanks!
06-01-2004, 07:22 PM
YSiGonzo

Around 17 pounds. 15 pounds got me 655 rwhp. 22 is getting me 851. All hot air too. Good luck!!!

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