Slow Spool on the 2.3

[andymoraitis]

Luke: I definitely need something bigger. The 35R sounds very attractive based on your spool numbers and the top end flow would be fantastic. I may look into one of those for the 2008 season. For now, I'd like to do the clutch and see what she's got on the current boost level and tune. Looking at the map, it's perfect for my setup.

Greg and Paul: I suppose the best thing to do would be to run it at the track and use their density altitude readings which would include baro and water grains for corrected altitude (like they do in NHRA competition). For now, these calculations seem to be pretty good.

Interestingly enough, when I got on it last night boost leveled off at 27 (PR of 2.89) instead of 28 so perhaps she'll stay there. I also had a chance to look at spool and she picked up around 100-150 RPM from the TB swap so there was a positive move in that direction. Attached is a new map for 27 psi with a projection at 50 lbs/min based on 800 ft. ASL. If she flows more than 50 it'll be worse but this turbo was marginal at best, especially in cold weather.

No worries. I have a strong feeling she'll easily meet my goals.

 

[CanadianTSi]

When are you gonna get that Bad boy to a Track Andy?

Also it would be interesting to get a Logger on it and see how much air you actually are flowing.

 

[fwdeclipse]

Does the track in your area stay open year round? I would also be intrested to see what you would run as opposed to your 16g. It sucks here in utah out track is closed until april.

 

[andymoraitis]

When are you gonna get that Bad boy to a Track Andy?

Also it would be interesting to get a Logger on it and see how much air you actually are flowing.

Ty,

Our tracks open in April so I'll hopefully have time to do the clutch beforehand. Also, it was logged at 25 psi in 55 degree air and she ran 46 lbs/min. I'm very confident that with the 1G TB and the boost increase to 27 that she'll pull around 50-51 lbs/min or maybe a bit more and there are still some little tricks I can do to enhance airflow without spending a dime. In the meantime, she's definitely haulin' the mail and with the TB change I'm really happy with the way it feels.

I should be able to pull another log this weekend and see what the actual flow is. I have a local friend I may get in touch with if my pals in Ft. Wayne are busy.

Cheers,

A.

 

[andymoraitis]

For everyone who was interested, I have new log results although since I used a friend's logger I don't have the physical logs. I really don't care that much about the log file anyway since all I wanted to see was peak airflow. The change from a 2G TB to a 1G TB with ported intake inlet and ported elbow were very good although I'm sure additional gains came from running in cooler air with 2 psi more boost. Here are the old numbers:

45.82 lbs/min at 7104 RPM: 55 degree air with 7 degrees of timing and 25 psi

And here are the new numbers:

51.20 lbs/min at 7244 RPM: 35 degree air with 8 degrees of timing and 27 psi

This is on an unmolested 2G MAF with a stock head and a stock intake manifold. What I find interesting is that although I'm off the compressor map, the turbo still made more power despite the fact that it certainly made more heat. The only thing remaining is a clutch change before race season although on these pulls the 2100 held the power just fine since the boost leveled off at 27.

Yipee!

Andy

 

[CanadianTSi]

Sick Amount of Airflow Andy.

This goes to show what I have always thought, people worry way to much about compressor maps. The fact that it holds boost shows that the turbo still has a little more left to give.

My car flows 46-47 lbs/min at 26psi even with the SMIM, so it goes to show that the Stroker moves some seriosu Air.

 

[andymoraitis]

I'm pretty happy with it considering that only the bottom end is built Ty, but yes I love the VE of the stroker and will be looking for a turbo with a bit more oomph in 2008. I do agree about maps but I also think that there's a point at which you can overspin the wheel and while that would likely be around 29-30 psi on this motor I don't want to chance any more boost especially since I'd gain minimal airflow.

Oh and the airflow has a typo in it. It should be 51.2 not 51.02. I'd love to see what a larger turbo and some port work would do.

Thanks for the feedback,

A.

 

[fourreGsixty3]

OH Snap Andy. Im not on here for a month or two, and your car is getting nastier...I finnaly know what the stroker's feel like...went for a ride in a 2.4, untuned, on a 60-1 @ 10psi, and that thing moved...launched it with the new spec stage 2 PP, with 4-puck, and , my eye's were in the back of my head...cant imagine what yours goes like. I want a ride hahaha. What clutch you going with buddy? ACT 2900? Or got a new idea?

 

[19BLACKGST98]

Sorry to bump such an old thread but this is the same problem my car has been having for 2 years now. I was wondering what ever came from this? Any tips on what to do?

http://www.dsmtuners.com/forums/hangout/335300-somthing-isnt-meshing-right-my-car.html

I wasn't sure what was causing it. My turbo spools at 4700 rpms and I know a guy local to me with almost the exact same set up and he hits full boost at 3700 rpms. When I shift and get back on the gas the boost will sit at 10lbs for about 1 1/2 sec before I hit strong boost again. Any help from anyone in this thread would be greatly appreciated.