Bolt on VVT swap dyno
#21
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Nice dyno numbers... Torque curve looks fairly flat without the typical mid-rpm dip that stock Miata's tend to have.
I am surprised to see 9 degrees of intake cam advance on the top end. Did you try lower values like 5 or 0 degrees? Most tgreads on this forum covering VVT tuning suggest reducing advance to 0-5 degrees above 5500rpm. Assuming that you did try less advance and the dyno showed less power, any idea why your setup likes the additional high RPM advance? (It does go against the theory of adjustable intake cams, not just forum posts...)
Thanks
I am surprised to see 9 degrees of intake cam advance on the top end. Did you try lower values like 5 or 0 degrees? Most tgreads on this forum covering VVT tuning suggest reducing advance to 0-5 degrees above 5500rpm. Assuming that you did try less advance and the dyno showed less power, any idea why your setup likes the additional high RPM advance? (It does go against the theory of adjustable intake cams, not just forum posts...)
Thanks
#22
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<p>You have 2 rows in your ignition table set at 100kpa load. Set your top ignition load row over 100kpa.</p><p> </p><p>I'm super jealous of your power. I think we need some drag times to substantiate. My very similar build makes <120whp on our dynapack. </p>
As far as the dyno is concerned, I agree.. Especially for a Mustang dyno I think it was pretty high. But who knows. Was yours sae weather corrected? My uncorrected number was 139whp (95 degrees F, 966ft altitude). Here is mine in comparison to my friend's 93 with a 99 engine, rb header and intake, light flywheel and straight exhaust taken on the same dyno a couple days later (crap quality sorry)
#25
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This was the state of my tune before the dyno. The VE table and VVT table are slightly different now, but same AFR targets
I didn't do a back-to-back on the dyno (wish I could have) but there was definitely a noticeable seat-of-the-pants improvement on the top end when I switched over from the stock '95 intake to yours!
I didn't do a back-to-back on the dyno (wish I could have) but there was definitely a noticeable seat-of-the-pants improvement on the top end when I switched over from the stock '95 intake to yours!
#26
BTW, i dont mean to insult your intelligence if you already knew this stuff and that was a rhetorical question solid numbers though, add me to the list of people jealous and wishing we had that power band.
#27
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Also, you should update your site - the guy you used in Charleston has moved to Europe, but I got mine printed at makexyz.com in one piece for $82.
#28
As far as I know it is the first time it has been tested with a vvt engine and a squaretop. Also, I do need to update my site, but this will also be going online soon:
http://www.durhamcomposite.com/
http://www.durhamcomposite.com/
#29
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As far as I know it is the first time it has been tested with a vvt engine and a squaretop. Also, I do need to update my site, but this will also be going online soon:
http://www.durhamcomposite.com/
http://www.durhamcomposite.com/
(see sig for web related things)
#31
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Didn't want to make a new thread, but I had some fun at AMP this last weekend. The car seems to accelerate pretty well as long as speeds are relatively low - above 100MPH it seems to hit an aero wall. I'm running the soft top, no front dam or lip and 225 width tires, so no surprises there. Definitely at least a second left on the table through driving improvements. I need less drag and better tires though - these 2 year old Rivals are downright awful when it's damp.
Some guy in an NC came up to me after one session and asked if I had a supercharger, because I kept pulling away on the straights First time that's ever happened. I'm sure corner exit speed helped.
Some guy in an NC came up to me after one session and asked if I had a supercharger, because I kept pulling away on the straights First time that's ever happened. I'm sure corner exit speed helped.
#32
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Sweet, thanks for the vid. I'm hella gonna use that new runoff area on 6.
Driving wasn't bad at all, but if you were looking for some tips:
-You can brake in a straight line T3-T4 and carry more speed through T4. You were early on T6, 11 and 12. Way off line through the carousel. You don't have to lift through the kink and use all of the track (and it scares me every time).
WTF was that guy doing on the left side of the main straight? Yikes.
Driving wasn't bad at all, but if you were looking for some tips:
-You can brake in a straight line T3-T4 and carry more speed through T4. You were early on T6, 11 and 12. Way off line through the carousel. You don't have to lift through the kink and use all of the track (and it scares me every time).
WTF was that guy doing on the left side of the main straight? Yikes.
#34
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Sweet, thanks for the vid. I'm hella gonna use that new runoff area on 6.
Driving wasn't bad at all, but if you were looking for some tips:
-You can brake in a straight line T3-T4 and carry more speed through T4. You were early on T6, 11 and 12. Way off line through the carousel. You don't have to lift through the kink and use all of the track (and it scares me every time).
WTF was that guy doing on the left side of the main straight? Yikes.
Driving wasn't bad at all, but if you were looking for some tips:
-You can brake in a straight line T3-T4 and carry more speed through T4. You were early on T6, 11 and 12. Way off line through the carousel. You don't have to lift through the kink and use all of the track (and it scares me every time).
WTF was that guy doing on the left side of the main straight? Yikes.
Hey, thanks for the feedback. Were you there this weekend? This was my 3rd time at AMP, the first two being chump races in an old integra. Still trying to get it figured out. Is the "carousel" turns 14/15 or turn 4? I messed with different lines through 15 all day but since I don't lift from 14 to turn 1 it didn't seem to matter much. In our chump car we just hugged the inside of 15 to make the distance as short as possible.
Turn 11 is hard in my car because the left front tire goes slamming into the tub, so I tried to take that corner in a somewhat civilized manner... not flat out and *** hanging out like our chump car. I need to get that figured out (bigger bump stops I suppose, or raise the car)
Guy on main straight had just stuffed it into the front straight wall and bounced across the track, coming to a stop where I passed him. That ended our session (see black/yellow flag at start/finish).
Last edited by Morello; 03-17-2016 at 01:03 PM.
#35
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Yes I have messed with it, but to what amount I've improved things I can't say. It idles well. Cold and hot starts are still questionable, though PID wouldn't affect that. I'm at 25/50/60 for PID, 1545 gain (though I guess this doesnt do anything in advanced mode?)
#36
Yes I have messed with it, but to what amount I've improved things I can't say. It idles well. Cold and hot starts are still questionable, though PID wouldn't affect that. I'm at 25/50/60 for PID, 1545 gain (though I guess this doesnt do anything in advanced mode?)
#38
I see that you still have the airbag in the car, have you put the car on a diet at all? Mine's pretty fat as-is but does touch the top of 4th @ 7200rpm with a dubious 140whp/120ft-lbs that was put down 3 years ago.
I'm running FCMs super low (4" pinch weld, rubs on everything), 15x9s with 225s, hardtop, and the R package front lip.
I'm running FCMs super low (4" pinch weld, rubs on everything), 15x9s with 225s, hardtop, and the R package front lip.
#39
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Hey, thanks for the feedback. Were you there this weekend? This was my 3rd time at AMP, the first two being chump races in an old integra. Still trying to get it figured out. Is the "carousel" turns 14/15 or turn 4? I messed with different lines through 15 all day but since I don't lift from 14 to turn 1 it didn't seem to matter much. In our chump car we just hugged the inside of 15 to make the distance as short as possible.
Try that in an Exocet sometime!!
I was at the past 2 Chump events at AMP with Hong Norrth Racing. P1 both times baby.
#40
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I've run amp a couple times in our white 1st gen integra, road Atlanta and vir with chump too. Never fast or coordinated enough to be competitive though. Pretty sure I saw you guys with jzilla out at road Atlanta last time I was there too, one of your mx3s was trying to chase me down.