http://www.datsunracing.com/z/view_album.php?page=1

(Bottom right pics)



Last night Brian Kennedy was up in MN tuning a Mustang and my buds Supra. After he got theirs roughed in we decided to just do a couple quick runs with my car. Check out my wavy gravy AFR, looks like I have a little work to do. I had a little boost creep also. But all in all I'm pretty happy with what this junk yard engine can do.



Let me have it, + or - comments.

that must be a lot of fun to drive!

Wow, that car is insanly fast for only 295rwhp. What psi was that run made at?

I remember it at 17psi, it was pretty quick https://www.nopistons.com/forums/pub...IR#>/smile.png Cam have you weighed your car?

finally! yes please tell what psi you were at on this run. i remember you telling me you were worried about your engine's health a while back, have you noticed anything since? and why aren't you on aim anymore!?

Hey guys, been a while since I've been online. Been REAL busy at work lately.



If you look at the dyno sheets you can see what pressure I'm running. It was a max of 11psi. Also, this is a dyno dynamics dyno. They read a bit lower than the others. Brian said the others read anywhere from 12-17% higher. So that would put me at ~330hp on one of the other dynos. I was kicking myself that I didn't run more pressure (15-17) I know it's a **** pile faster running those levels but oh well.

[quote name='setzep' date='May 28 2005, 05:34 AM']Hey guys, been a while since I've been online. Been REAL busy at work lately.



If you look at the dyno sheets you can see what pressure I'm running. It was a max of 11psi. Also, this is a dyno dynamics dyno. They read a bit lower than the others. Brian said the others read anywhere from 12-17% higher. So that would put me at ~330hp on one of the other dynos. I was kicking myself that I didn't run more pressure (15-17) I know it's a **** pile faster running those levels but oh well.


[/quote]



2 things, it will run forever at 10psi. 2 tune the piss out of it @10psi, its safer/easier.

It may run forever at 10psi but you know how it goes... More pressure more fun.

[quote name='setzep' date='May 28 2005, 09:35 AM']It may run forever at 10psi but you know how it goes... More pressure more fun.


[/quote]



yeah, just dont do the "it was running great@15psi, but it didnt feel fast so i turned it up, and then the motor blew"

Great #s setzep, hopefully in the next month I can post up some numbers too https://www.nopistons.com/forums/pub...IR#>/smile.png.

Whoa. Those are awesome numbers at just 11psi. Wonder what it'd be at 15-17 range?

That thing must be a ******* monster, considering the weight

Look where the boost starts, damn near off idle https://www.nopistons.com/forums/pub...IR#>/smile.png We started the pull at ~1900rpm. I think this turbo is a pretty good size for a stock port 13b-re. Boost in the low revs and pulls to the top.



https://www.datsunracing.com/zalbums...yno2.sized.jpg

NICE numbers for only 12psi. What is your boost controller set at? Now take it to the track and put it on a scale. One day we will meet, at a track I hope. It must be nice to see your hard/nice work pay off.

chuck

Nice#'s, I hope to get mine tuned this weekend.

[quote name='88fc3sw/hx83' date='May 30 2005, 07:03 AM']Nice#'s, I hope to get mine tuned this weekend.


[/quote]



Very Nice curve Setzep!!

That turbo spools like a MOFO!!



I can't wait to see higher PSI Numbers.



EDIT: Okay, I noticed you were creeping to about 15 PSI.

I thought you had fixed the boost creep?



So you are making 295 at 14/15 PSI?

Still Damn good. Get some race gas and go for 20+!



I should be re-dynoing mine with the Haltech in a

month or so.

Thanks guys!



The boost hit a max of almost 12psi as seen in the TQ/PSI graph above. Peak power was exactly at 7k as you can see in the HP/AFR graph below. You can also see how the rich AFR's were hurting my power.



https://www.datsunracing.com/zalbums...dyno.sized.jpg



Now I'm really wishing I had put the higher pressure WG spring in for that night. I don't run a boost controller so I had no way of safely turning it up while I was at the dyno. I guess it's ok though, now I know what my car makes on low boost whether I'm picking up groceries or headed to work everyday.

I hate to Disagree, but look at your exact Dyno sheet.

I highlighted it so you could see it clearer.



Your PSI peaked at 15PSI at approximately 6500 RPM.

DirectFreak,



Your looking at his torque in Ft.Lbs line (230 Ft.Lbs -ish) left scale. The lower line is his boost pressure (11~12 psi) right scale. The other dyno graph is HP and A/F.



~Mike............

[quote name=''//icked' date='Jun 1 2005, 12:11 PM']DirectFreak,



Your looking at his torque in Ft.Lbs line (230 Ft.Lbs -ish) left scale. The lower line is his boost pressure (11~12 psi) right scale. The other dyno graph is HP and A/F.



~Mike............


[/quote]



Okay - thanks for clarifying it.

I am used to Dynojet dynosheets.

Just for comparison Set, I'm running the same turbo as you are, TD07-25G .. dynoed at the end of last summer .. 371rwhp@14psi...

This was on a 3mm motor with a very small streetport (might as well been stock).. 70psi compression numbers.. the motor wasn't the strongest..



the motor has just been rebuilt and now runs 2mm seals and a muhc larger port job.. we'll see what kind of power diffrence it makes once I get it broken in.. however, looking at your hp and torque curves, they are very similar to what I saw on my dynographs..



With a car as light as an FB, I'm sure you car is quite a bit quicker @ 293rwhp than my heavy boat @ 371...nice goin..

Chris Ng

How much does your car weight and what year? My FB was 2720lbs with me in the car. Just wondering, thanks.

chuck

Hey Chris, thanks for chiming in. Good to hear from another person that runs this turbo, not many of us around. Have a few questions for you.



What kind of dyno did you run your car on just for curiosity sake?

Do you notice a big difference between power levels with 11-12psi Vs 14-~17?

Have you ever had any boost creep with this turbo?



Thanks!



[quote name='Chris Ng' date='Jun 1 2005, 04:27 PM']Just for comparison Set, I'm running the same turbo as you are, TD07-25G .. dynoed at the end of last summer .. 371rwhp@14psi...

This was on a 3mm motor with a very small streetport (might as well been stock).. 70psi compression numbers.. the motor wasn't the strongest..



the motor has just been rebuilt and now runs 2mm seals and a muhc larger port job.. we'll see what kind of power diffrence it makes once I get it broken in.. however, looking at your hp and torque curves, they are very similar to what I saw on my dynographs..



With a car as light as an FB, I'm sure you car is quite a bit quicker @ 293rwhp than my heavy boat @ 371...nice goin..


[/quote]

Hey setzep, I think you'll find that turbo really wakes up at around 15psi ish. https://www.nopistons.com/forums/pub...IR#>/bigok.gif

[quote name='sleeper7' date='Jun 1 2005, 03:51 PM']Chris Ng

How much does your car weight and what year? My FB was 2720lbs with me in the car. Just wondering, thanks.

chuck


[/quote]



Chuck, I have an 88 FC.. last time I weighed it, it was aprox 3100lbs with me in it..

[quote name='setzep' date='Jun 1 2005, 05:39 PM']Hey Chris, thanks for chiming in. Good to hear from another person that runs this turbo, not many of us around. Have a few questions for you.



What kind of dyno did you run your car on just for curiosity sake?

Do you notice a big difference between power levels with 11-12psi Vs 14-~17?

Have you ever had any boost creep with this turbo?



Thanks!


[/quote]



The run was made on a dynojet, so all tihngs being equal, our numbers shouldn't be as far apart as they appear on the dynographs themselves..



As for the turbo, I found that there was a night and day diffrence as soon as I ran above 13psi.... running anything below that, power came on very linear.. but didn't give quite the same rush as my old hybrid setup gave.. as soon as I cranked things up past 13psi, things really started to come alive, power was linear right till crossing the 13psi threshold, then you were pushed back in the seat...



I'm currently running a tial 40mm wastegate with a 9lb spring.. when I first installed the turbo, I ran open vented wastegate just off spring pressure, and didn't notice any creep whatsoever... however, I then plumbed the wastegate back into the exhaust.. after doing this, I noticed that I would creep 2 and sometimes 3 psi as soon as I passed 6500rpm.. part of this creep could have been due to the sharp turn I has on the dump tube when plumbing it back into the exhaust... I have since gone back to open venting the wastegate in hopes that I can get rid of the boost creep..I'd rather have the car be louder, then run the risk of overboosting... The only other change was the fact that I had installed a profec B for boost control.. I have heard conflicting stories by some people.. some noticed boost creep using the profec, while others had not.. either way, once the motor has a bit more mileage on it, and I start to bring the boost back up, I'll make sure to find out if the creep is due to the profec, the wastegate dump tube design, or jsut inherent in the turbo setup itself (I recall your postings on the other forum regarding your boost creep issues)



by the way, here's a link to my dynochart if you'd like to compare:

http://members.shaw.ca/sumps/sept2504dyno.jpg





Anyways, as IGY has mentioned.. at 12psi, the turbo really isn't stretching it's legs yet.. turn the boost up by a couple of pounds and I'm sure you will find a whole new world https://www.nopistons.com/forums/pub...IR#>/smile.png

Your dyno looks pretty bad once it hit 6200rpm, is that from misfires/detonation? I bet it could have made more power if that problem was taken care of.



http://members.shaw.ca/sumps/sept2504dyno.jpg



Sounds like I'll have to turn up the boost a bit (hmm... I think I have a 13psi spring in the garage) to get more bang for my buck.

I think my boost creep issues that have plagued me in the past and a little right now are due to my small main runners being 1.69"ID. This is the smallest I've herd someone running. Maybe the velocity is just too high? But anyways, I'll try running more boost and see if the creep goes away or gets worse.



Thanks guys!

creep should go away if you raise the boost, think of creep as the minimum boost your engine/turbo/wg/manifold setup can run, if you raise it over that you should be just fine

[quote name='j9fd3s' date='Jun 3 2005, 01:10 PM']creep should go away if you raise the boost, think of creep as the minimum boost your engine/turbo/wg/manifold setup can run, if you raise it over that you should be just fine


[/quote]



at 15psi, I end up creeping to 16-17psi at 6500rpm ... I don't really want to have to turn boost up to 17psi just to keep this from happening https://www.nopistons.com/forums/pub...DIR#>/wink.png



Setzep - All my dynos, including ones when I was running a hybrid, showed the same breakup as you see on my chart at the same point.. I used to think it was ignition related, however, this breakup occurs no matter what boost I'm running (I also do not "feel" the car runnign any diffrently at the point of the breakup) .. I'm leaning towards the problem being with how poorly my motor was built by the previous owner (not his fault, but the engine builders) ... once I put the car back on the rollers, we will see if it acts any diffrently (jsut rebuilt it.. has 30kms on it now)

Mike- The same thing would happen to me when I ran the 13psi spring in the wastegate, it would end up drifting a couple pounds higher by 7k.



Chris- How do you think an engine itself could cause strange ripples on a dyno graph? I thought ripples were always from the engines peripherals (whether it be ign or fuel related). Or maybe it's from wheel slippage/hop on the dyno? When I'm passing 6k in the boost to tell you the truth I could probably loose 30hp due to some kind of misfire and I woulden't be able to tell the difference cause it revs so fast up there. Are ignition related problems normally boost related or rpm related? Maybe a datalog would be able to tell if you have any "blips" of incorrect rpm if you haven't looked at that already.

congrats on the numbers, Setzep! i'm fairly sure you can eek some more out of that motor with some finer tuning.



what kind of wastegate and exhaust setups are you running?

[quote name='Chris Ng' date='Jun 1 2005, 06:41 PM']Chuck, I have an 88 FC.. last time I weighed it, it was aprox 3100lbs with me in it..


[/quote]



Does anyone know what a FB weighs? Chris Ng is your car gutted out or is that weight with full interior? You got to love power to weight ratio with a rotary. That's why I have a Datsun 1200 with a rotary and I'm trying to keep it under 2000lbs with me in it. Setzep your car must be fun as hell to drive around the streets and probably surprises alot of people. I had a '73 RX3 with a stock turboII motor in it and that was pretty fast yours must scoot along just fine.

I know mine without the front bumper beam, just the drivers seat, a quarter tank of gas and me sitting in it was 2320.

2320lbs with you in the car... That's 400lb less then mine. Mine must have been a pig or maybe I should have removed the spare tire, spare parts and tools before I got on the track. I'm 190lbs.

chuck

diabolical1- I know it can do better with more boost and a little leaner in come areas. I like running the low boost because it's already too much for the tires and the car. Durring the past few years I managed to wear out the rubber bushings in the rear control arms so it will axle hop like mad when spinning the tires. I don't think more power is going to make that any better for the time being https://www.nopistons.com/forums/pub...DIR#>/wink.png

You can see what kind of exhaust/wastegate I'm running here: http://www.datsunracing.com/z/setzep



13BTNOS- It works out well, no one thinks I'm packing anything and I like it that way. I just wish it was a little quieter so it would be 100% sleeper. I remember a couple years ago I was doing some road tuning. I pulled away from the top sign from my neighborhood and got on it pretty good to log AFR and ~ a mile down the road this kid in a integra gets right on my ass like he's going to do something. Those are the times I wish I had the two stage rev limiter hooked up so I could melt the body kit off that car.

I imagine a Rx3 with a T2 engine would be just as fun, why did you sell?

13BTNOS- It works out well, no one thinks I'm packing anything and I like it that way. I just wish it was a little quieter so it would be 100% sleeper. I remember a couple years ago I was doing some road tuning. I pulled away from the top sign from my neighborhood and got on it pretty good to log AFR and ~ a mile down the road this kid in a integra gets right on my ass like he's going to do something. Those are the times I wish I had the two stage rev limiter hooked up so I could melt the body kit off that car.

I imagine a Rx3 with a T2 engine would be just as fun, why did you sell?


[/quote]



Sold it because I got bored with it and I wanted to build a race car and it was too clean of a car to rip apart and gut out. It had a decent body with perfect interior would be a shame to tear up a nice RX3 so I sold it to a close friend who still has it and I'm still working on it. LOL. And I didn't want to have anymore project cars besides my Datsun 1200 so I got rid of all my other cars except the one I have now. Too many projects you will never get them all done and now I have one which will be really fun.

I smell what you're stepping in.

[quote name='setzep' date='Jul 6 2005, 06:35 PM']I smell what you're stepping in.


[/quote]



Quick Question for you setzep.. .What kind of boost do you find you can make in 1st gear? from a hard launch?



Also, do you find that this particular turbo takes a bit longer time building the first initial 5psi boost, and once it passes the 5psi threshold, that's when boost starts to really build quickley?



A friend in town is also running the same turbo and we are just comparing similarities and characteristics of this setup...



Thanks,

It varies, 1st gear maybe only 5psi because I can't create enough load to make any more pressure. The time it takes to makes boost and spin the tires doesn't allow it to go much farther than 5psi in 1st.

If I'm cruising along down the freeway @ ~ 3500 and punch it it will jump to 3psi right away then it will climb pretty fast once it hits 4000rpm. I think it builds fast because the turbo is "spooling" while putting along down the road at 3500 so it's putting a few psi right at the throttle blades just waiting to jump in one I crack the throttle.