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      08-17-2011, 02:52 PM   #177
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Quote:
Originally Posted by Roffle Waffle View Post
thanks for the tip about hitting redline. This is what happens when I hit my redline, I also feel the power being pulled in the last few hundred RPM.



I left everyone hanging because I couldn't believe the numbers, and had to make sure with a few more runs. I regularly hit 8 to 9 psi shifting at 8000
I don't believe it...in my boost test video, it was normal for the boost to spike a full 2PSI+ at the end of a redline pull. Can you get a passenger to take a video of the run itself rather than just using "Peak recall" which has been demonstrated to be inaccurate on these setups? My most recent dyno with an accurate boost plot also showed this uptick at the very end of the run.

Beedub, I think this probably applies to your peak recall too...the real test is knowing what boost the motor is running at with the throttles still fully open, just before the shift which causes immediate pressure fluctuations in the BPV.
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      08-17-2011, 02:55 PM   #178
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Like I said, normally, I get 8 to 9psi. This is from a small spike from revving slightly past 8000rpm. I will get video
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      08-17-2011, 03:01 PM   #179
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Quote:
Originally Posted by Beedub View Post
was thinking about running the tilet race seats :-) the ones you see in the little caterhams and lotus exiges, those badboys weigh like 6lbs!!!!!!

the next step is to drop some serious weight i agree.....

ive already done the lightweight battery :-)

so the big question.... which is faster?? this or the viper?? and more importantly, which do you prefur??
they don't look to comfy for a daily driver..
http://www.tillett.co.uk/car-racing-seat.asp

I can't tell if the 470hp viper is faster or not, because it had about 500lb feet of torque. Some time at the track will tell. Its much easier to hit all the shifts perfectly with the z4m, and you feel much more in control of the car. After 6000rpm, I'd say the z4m FEELS faster and probably moves faster too. The overall power delivery is just a perfect balance with this kit. Low rpms are great for putting around town quietly, or in the rain, mid range has nice torque to get things moving, and up top its just a snarling beast. Top of 3rd gear is pretty intimidating since you're accelerating very fast into tripple digits
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      08-17-2011, 03:22 PM   #180
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Quote:
Originally Posted by Roffle Waffle View Post
they don't look to comfy for a daily driver..
http://www.tillett.co.uk/car-racing-seat.asp

I can't tell if the 470hp viper is faster or not, because it had about 500lb feet of torque. Some time at the track will tell. Its much easier to hit all the shifts perfectly with the z4m, and you feel much more in control of the car. After 6000rpm, I'd say the z4m FEELS faster and probably moves faster too. The overall power delivery is just a perfect balance with this kit. Low rpms are great for putting around town quietly, or in the rain, mid range has nice torque to get things moving, and up top its just a snarling beast. Top of 3rd gear is pretty intimidating since you're accelerating very fast into tripple digits
honestly tom you simply would not believe how comfy those seats are!!! they do some with minimal padding and i swear they are alot more comfy than youd ever believe easily DD-able.....

now.... do you get what i meant when i said the kit is perfectly in keeping with the stock powerband and ///M mantra of high rev power??
the big centri basically keeps the stock curve and moves it higher, so much fun and i agree 3rd is jail just waiting to happen.

it feels like we swapped out the motor for a high rev V8........ infact this is my first s/c car after a long line of turbo cars and im utterly convinced by supercharging, the power delivery is perfection and sooo much more controllable,..... my rear tyes are taking a serious beating right now!! lol

honestly..... right now, i simply cant think of another car that i would rather own that wouldnt bankrupt me to buy... the kit has not only transformed my car but also my ownership experience.

so whats next for your car and any videos???
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      08-17-2011, 03:27 PM   #181
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...not to mention the throttle response is even better than stock.

Next is fixing my idle (biggest mystery), adjusting the airbox so its not angled up so high, and probably fresh header gaskets. Then we'll see what my budget allows, but definitely nothing big. I'd love to install the meth kit thats in my garage, but from what I read I'll lose power up top without tuning, which I'm not ready for
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      08-17-2011, 03:33 PM   #182
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Quote:
Originally Posted by iPhoneEngineer View Post
I don't believe it...in my boost test video, it was normal for the boost to spike a full 2PSI+ at the end of a redline pull. Can you get a passenger to take a video of the run itself rather than just using "Peak recall" which has been demonstrated to be inaccurate on these setups? My most recent dyno with an accurate boost plot also showed this uptick at the very end of the run.

Beedub, I think this probably applies to your peak recall too...the real test is knowing what boost the motor is running at with the throttles still fully open, just before the shift which causes immediate pressure fluctuations in the BPV.
i did alittle test to confirm accuracy..... firstly i "cleared" my peak and changed up at 7400 rpm and say precisely 7.4ish psi, i did the same numerus times with proper 7900 pulls WITHOUT popping the limiter and say 8.0psi+ on the peak..... if i bump the limiter i see the peak showing @ over 10.5psi...... i can gaurantee you im hitting 8psi+ @ 7900, me and my shop were at one point worried about it infact so i cantacted ess who said it happens......

i dont see any spikes on boost when driving, just a clean clear sweep of the gauge, when i bang the limiter, thats when i see the spike offs like you talk about....... which is one thing is ALWAYS noted (look back and see;-)) its veryeasy to see when it does that as it swings wildly as you pop the limiter, im talking about a clean NON redline run.... and every single time is see 8psi on those runs....... tom will see even more due to the raised rev limit

either way im hitting 7psi WELL before redline.........
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      08-17-2011, 04:25 PM   #183
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Can you post more about how you are going to mount your gauges? Doesn't beedub's setup require removing the cig/power port?

How many miles did you have on the car when the plugs were changed? I wonder if my car would benefit too.
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      08-17-2011, 04:36 PM   #184
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I placed an order on the 3d Design Gauge Pod, same as Byron's. I'll have to move the cig port, which I'm not looking forward to. Right now I temporarily took out the coin/ash tray, and fit my boost gauge there. No point in mounting it anywhere else temporarily, I didn't want to do the wiring twice

Car has 39k miles. Keep in mind I had 2 or 3 weeks of oxygen sensor issues. Old plugs had white stained tips, which means I was running lean, which doesn't make too much sense but thats usually the diagnosis. You have nothing to lose by replacing your spark plugs, they're $80 shipped on ebay. You're not going to get more boost, but why leave any potential power on the table?
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      08-17-2011, 07:07 PM   #185
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without getting to redline

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      08-17-2011, 11:21 PM   #186
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Quote:
Originally Posted by Beedub View Post
i dont see any spikes on boost when driving, just a clean clear sweep of the gauge, when i bang the limiter, thats when i see the spike offs like you talk about....... which is one thing is ALWAYS noted (look back and see;-)) its veryeasy to see when it does that as it swings wildly as you pop the limiter, im talking about a clean NON redline run.... and every single time is see 8psi on those runs....... tom will see even more due to the raised rev limit
In my video I never hit the actual rev limiter though I was definitely going to 7900RPM on most runs. Nonetheless you can still see brief 2PSI spikes at the shift... I'm not over-revving the engine on the shift or anything crazy, either. Hopefully it's not just my setup
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      08-17-2011, 11:22 PM   #187
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Quote:
Originally Posted by Roffle Waffle View Post
I placed an order on the 3d Design Gauge Pod, same as Byron's. I'll have to move the cig port, which I'm not looking forward to. Right now I temporarily took out the coin/ash tray, and fit my boost gauge there. No point in mounting it anywhere else temporarily, I didn't want to do the wiring twice

Car has 39k miles. Keep in mind I had 2 or 3 weeks of oxygen sensor issues. Old plugs had white stained tips, which means I was running lean, which doesn't make too much sense but thats usually the diagnosis. You have nothing to lose by replacing your spark plugs, they're $80 shipped on ebay. You're not going to get more boost, but why leave any potential power on the table?
Haha interesting, my car is about to turn 39k. I just ordered the plugs, looking forward to seeing if they make a difference. I was running rich for a while due to the incorrect crankshaft pulley.

Beedub, if you've discussed where you relocated your cig lighter/power port, could you link us to it?
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      08-18-2011, 02:58 AM   #188
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toms got booooosssstttt!!!!!

tom i simply refuse to believe your hankooks can live with the vt2 at this boost...... tell me the truth... do you feel like the grim reeper is sat on your shoulder everytime you drive????

i wish we could lean out the tune alittle and run meth/water injection, thats an easy 40rwhp.........

have you got an aftermarket exhaust on your car?? when you do, you will simply be shocked at how the exhaust "note" changes with boost.... its really changed the noise my car makes, Cfrine88 also noted a louder and different note to the exhaust, i suppose its got air beign forced in, it will change the tone somewhat.
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      08-18-2011, 04:57 AM   #189
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Quote:
Originally Posted by Roffle Waffle View Post
My friend has a vbox, and we'd like to get some numbers before the week's end.
This would be awesome, could you PLEASE report some 60-130 times?
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      08-18-2011, 09:15 AM   #190
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Quote:
Originally Posted by iPhoneEngineer View Post
In my video I never hit the actual rev limiter though I was definitely going to 7900RPM on most runs. Nonetheless you can still see brief 2PSI spikes at the shift... I'm not over-revving the engine on the shift or anything crazy, either. Hopefully it's not just my setup
no no, its perfectly normal to jump and extra 2psi on an over-rev
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      08-18-2011, 09:16 AM   #191
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This would be awesome, could you PLEASE report some 60-130 times?
thats the goal. Its been raining a lot though. What kind of times did you get with your VT1 kit?
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      08-18-2011, 09:30 AM   #192
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Quote:
Originally Posted by Beedub View Post
toms got booooosssstttt!!!!!

tom i simply refuse to believe your hankooks can live with the vt2 at this boost...... tell me the trust... do you feel like the grim reeper is sat on your shoulder everytime you drive????

i wish we could lean out the tune alittle and run meth/water injection, thats an easy 40rwhp.........

have you got an aftermarket exhaust on your car?? when you do, you will simply be shocked at how the exhaust "note" changes with boost.... its really changed the noise my car makes, Cfrine88 also noted a louder and different note to the exhaust, i suppose its got air beign forced in, it will change the tone somewhat.
its odd, they're completely worthless in 1st gear, yet stick pretty damn well in 2nd gear. This morning the air was much colder, and I could feel more torque everywhere. I'd actually play with the throttle by curling the toes inside my shoes, I'm funny like that. One little touch and the car responds with forward progress

I think with a handheld tuner, and an a/f ratio chart, ess theoretically SHOULD be able to tune this car for meth from a remote location. It may take a few runs though

I only have the cat-less euro headers, and the rest of the exhaust is stock. I'm 99% sure the secondary cats on the US cars are less restrictive than the EURO cars because they're shorter inside. Even with this setup, I can get the car to burp and pop when I poke the gas pedal, I even get very slight drone if I'm in the wrong gear. Because of this, and that I drive 12k+ miles a year, sometimes with clients, I don't want to make the car any louder. The only thing I don't like is the weight of the rear mufflers. I like the sleeper look from the back though, and overall the car is fairly quiet on partial throttle
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      08-18-2011, 09:55 AM   #193
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the handheld tuner allows data logging which mean ess can 100% tune remotely..........
problem is they wont tune for meth at all.... and i mean at all........
you need a seriously skilled person to tune the z4m dme on alpha n management..... ess know that and simply were stuck..... get someone else to do it and we have no warranty at all...... not something i can risk.

but yes i agree on the really cool morning this thing really rips!!!

throttle response is razor sharp........ this would make such an awesome track car properly prepped with this engine and blower.
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      08-18-2011, 10:06 AM   #194
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Quote:
Originally Posted by Roffle Waffle View Post
thats the goal. Its been raining a lot though. What kind of times did you get with your VT1 kit?
I have only made 2 attempts. My best time is atm 10.25 in 0.2% incline. Would be great to get under 10 :P.

Your time will pretty much make my decision whether or not i will upgrade to Vt2 :P
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      08-18-2011, 10:21 AM   #195
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no pressure...
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      08-18-2011, 10:42 AM   #196
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I HAD made some videos with my gopro before, but this was when the car was a bit lower on power and would go to limp mode most of the time. I deleted those

I'll make some fresh ones
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      08-18-2011, 09:21 PM   #197
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Quote:
Originally Posted by Roffle Waffle View Post
no no, its perfectly normal to jump and extra 2psi on an over-rev
I'm specifically stating that I did not over-rev the engine or hit the limiter a single time in my whole video, which shows a mechanical boost gauge popping at least 2PSI on the shift...
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      08-19-2011, 03:49 AM   #198
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Quote:
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Quote:
Originally Posted by Roffle Waffle View Post
no no, its perfectly normal to jump and extra 2psi on an over-rev
I'm specifically stating that I did not over-rev the engine or hit the limiter a single time in my whole video, which shows a mechanical boost gauge popping at least 2PSI on the shift...
I get no boost gauge movement/fluctuations on shifting, it simply falls in boost then builds in my next gear........
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