Big power stock intake manifold users; How fast have you gone?
Mar 30, 2013, 10:05 PM
#47
Here's the comparison of the f1i vs curt brown manifold on 33 PSI. Both pulls are the same with no tuning, the only difference is the f1i was in 15* colder temperature (same laptop, same road, etc)
Tom and I did a few pulls because we did not believe it really picked up 50hp. We did a couple logs and all were right near 660 on the stocker.. Nothing changed with the logging... no changes at all. I am positive the power level is accurate on the stocker because it was making similar power last year when it was trapping 146MPH and it feels the same (I have tons of seat time in my car, I can tell the power changes easily).
I really won't be able to get any more data from the F1i as its sold. I'm not sure why its power is down at 33psi with it. It does feel faster with the stock intake manifold, but that is mostly due to the TQ i'm sure... Either way, i'm very happy with this manifold
***Like I said above, this may not be accurate so take it lightly.. *HOWEVER* based on my butt dyno, the car does feel a lot faster but this could be the TQ that i've never felt before...
Tom and I did a few pulls because we did not believe it really picked up 50hp. We did a couple logs and all were right near 660 on the stocker.. Nothing changed with the logging... no changes at all. I am positive the power level is accurate on the stocker because it was making similar power last year when it was trapping 146MPH and it feels the same (I have tons of seat time in my car, I can tell the power changes easily).
I really won't be able to get any more data from the F1i as its sold. I'm not sure why its power is down at 33psi with it. It does feel faster with the stock intake manifold, but that is mostly due to the TQ i'm sure... Either way, i'm very happy with this manifold
***Like I said above, this may not be accurate so take it lightly.. *HOWEVER* based on my butt dyno, the car does feel a lot faster but this could be the TQ that i've never felt before...
Last edited by badev0; Mar 30, 2013 at 10:13 PM.
Mar 31, 2013, 12:52 AM
#49
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It is quite surprising but I would like to see them both tuned on kill. That will clearly show.... there's a bunch of "ifs" but in this test the stocker wins. Wish we had more... thanks for sharing though Scott and Tom
Apr 1, 2013, 09:53 AM
#52
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I ve trapped 134-134.5 on the stock unported manifold, stock TB, stock unported head except cams and valvetrain on a built bottom end and a BR FS635 at 30-31 psi boost on straight pump...
Apr 1, 2013, 10:28 AM
#54
Alright guys, I got the Curt brown manifold on the car. I did a pull so we we could overlay the results vs the f1i however it misfired after 6k and had a freeze plug pop out.. it'll be a few days before I get a new log, so here's the results comparing low & mid range. Pretty good huh? I don't think its going to loose much up top at all.
No tuning was done. 43 psi.
No tuning was done. 43 psi.
Look at that dip, looks like something in the road. Doubt you would have got that on a actual dyno.
Weird results on the later road test, seems odd that stocker would outperform the AMS by that much. Same TB used on each one?
Nice work either way.
Last edited by project_skyline; Apr 1, 2013 at 10:32 AM.
Apr 2, 2013, 06:23 AM
#58
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Curt Brown has done extensive testing for this setup and i'm not surprised of the gains. Going to see him this week as me and couple of other guys are going with Curt Brown's Intake with FB 70mm TB setup.
Apr 2, 2013, 07:10 AM
#60
The curt brown manifold is different from your average stocker because of increased plenum volume which I know helps.