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Old 07-10-2014, 10:03 AM   #21
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Quote:
Originally Posted by soviet View Post
Thats the weirdest dyno plot I've ever seen.
Looks like it spools by 3k and yet TQ peak is at 6k rpm??
The car was originally tuned to ramp up to 300 hp as quickly as possible and then stay flat as we were planning on doing NASA time trials.

However on original spec miata 7" toyo RA1s and spec bilstein suspension as we were developing the car, I was struggling with drivability when getting the power down coming out of corners as turbo spooled up.

When we retuned off e85, I specifically asked him for a very linear, very progressive tune to help with drivability until we got the car reliable as I was not prepared to invest in new suspension, wheel and tires until the car was reliable

Car goes great now …..esp with new suspension, wheels and tires ….. but plan to keep tune this way until I get more familiar with car as it is fast enough the way it is and I'm more concerned about longevity than absolute power


I'm off to Hershey Park with family for next 2 days so will catch up with any new posts over the weekend
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Old 07-10-2014, 10:44 AM   #22
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Ah, that makes sense then.
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Old 07-10-2014, 10:52 AM   #23
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I'm surprised there were no wheel and tire comments. Are the 275s really faster on a track than the 245s with only 300hp? Thats a whole bunch of drag and rolling resistance.
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Old 07-10-2014, 11:00 AM   #24
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Quote:
Originally Posted by Savington View Post
Just FYI, I made 300whp at 14psi on E85 on the same turbo through a stock VVT head. I would expect a pump gas car to need another ~2psi or so to make the same power, especially through a '94 head.
I made 225whp at about 9.5psi on my 2871 with my built VVT motor. I also am hard pressed to see 300whp on pump gas at 11psi.
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Old 07-10-2014, 02:38 PM   #25
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Quote:
Originally Posted by thenuge26 View Post
Your dyno says 'flywheel tq', could that be 302bhp rather than whp?
Ding ding. Your dyno plot isn't showing WHP.

Just so you know: we aren't ballbusting. It's a great build and an awesome car, no doubt, and I'm sure it's a blast. But we are all about verifiable and accurate claims. Gotta be careful with the numbers you throw around.

Either way, roughly 265ish whp at 11 PSI isn't bad at all, and that's probably more or less what you're running there.

I'm a walking anomaly, b****es
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Old 07-10-2014, 05:51 PM   #26
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Originally Posted by turbofan View Post
Ding ding. Your dyno plot isn't showing WHP.

Just so you know: we aren't ballbusting. It's a great build and an awesome car, no doubt, and I'm sure it's a blast. But we are all about verifiable and accurate claims. Gotta be careful with the numbers you throw around.

Either way, roughly 265ish whp at 11 PSI isn't bad at all, and that's probably more or less what you're running there.
Hello from Hershey Park during afternoon nap time ……..

Ok, what you say makes sense and will discuss with Evans Tuning in 3 weeks. I asked him to tune to 300 rwHP but perhaps there was a gap in the communication…..

whatever the issue, 2 things spring to mind ……

(i) F**K me, the car is fast if it ONLY has 265 rwHP
(ii) it WILL have 302 rwHP in about 3 weeks time when retune!!!!!!!
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Old 07-10-2014, 05:57 PM   #27
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Originally Posted by Leafy View Post
I'm surprised there were no wheel and tire comments. Are the 275s really faster on a track than the 245s with only 300hp? Thats a whole bunch of drag and rolling resistance.
Pocono was the first time on new suspension and hoosiers and I was nowhere near the limit of the car or the grip of the tires

Better to have a whole bunch of drag and rolling resistance than too little grip followed a big off……..

I'm a slow and steady type of guy (yes - both on the track and off ) so we'll continue making small steps in the right direction rather than big ones in the wrong direction…...
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Old 07-10-2014, 05:58 PM   #28
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It's not flywheel torque, that's a quirk in Dynapack's viewing software. It's wheel torque.
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Old 07-10-2014, 06:02 PM   #29
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Any reason you picked 300whp in particular? If you're just having fun and not worried about classing, I would just tune for 260ft-lbs across the board and take whatever hp that gets you (260ft-lbs being how much power bbundy was making when he broke his last 6-speed).
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Old 07-10-2014, 06:04 PM   #30
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I see Wisco pistons. Maybe a bit more compression than stock?
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Old 07-10-2014, 06:13 PM   #31
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Originally Posted by thenuge26 View Post
Any reason you picked 300whp in particular? If you're just having fun and not worried about classing, I would just tune for 260ft-lbs across the board and take whatever hp that gets you (260ft-lbs being how much power bbundy was making when he broke his last 6-speed).
Crap I must have missed something, I thought I saw ~310?

[Edit] here's what I saw last (your suggestion is probably for the best regardless)
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Originally Posted by bbundy View Post
well I just stripped second gear in one too.

4th gear in 3 of them and now a second gear.

275 Hoosier A6 on 15X11 wheels grippy surface ~310 RW ft-lbs.
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Old 07-10-2014, 06:48 PM   #32
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looks like a dyno plot dominated by boost creep.
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Old 07-10-2014, 06:59 PM   #33
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mine made ~325 hp at 14 psi on 92 pump gas but it is a stroker motor. Iteresting that I turn up the boost for autocross but when I log it it still doesnt make more boost on an autocross course. it simply is unable to load the engine enough in 2nd gear.
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Old 07-10-2014, 09:45 PM   #34
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I thought I remembered you breaking one after de-tuning for TT?
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Old 07-10-2014, 10:52 PM   #35
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Quote:
Originally Posted by SSMtobeturbo'd View Post
The car was originally tuned to ramp up to 300 hp as quickly as possible and then stay flat as we were planning on doing NASA time trials.
However on original spec miata 7" toyo RA1s and spec bilstein suspension as we were developing the car, I was struggling with drivability when getting the power down coming out of corners as turbo spooled up.

You need this with traction control

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Old 07-10-2014, 11:22 PM   #36
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Any reason you picked 300whp in particular?
200 seemed gay and 400 seemed too much……...
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Old 07-13-2014, 05:39 PM   #37
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I'm curious to see how the MSM Transmission holds up.
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Old 07-13-2014, 06:09 PM   #38
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300 is JUST RIGHT I completely agree
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Old 07-13-2014, 10:57 PM   #39
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Quote:
Originally Posted by Leafy View Post
I'm surprised there were no wheel and tire comments. Are the 275s really faster on a track than the 245s with only 300hp? Thats a whole bunch of drag and rolling resistance.
Oh god, power levels to rolling resistance. It's just like pre-6UL M.net all over again.
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Old 07-13-2014, 11:04 PM   #40
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Originally Posted by Nagase View Post
Oh god, power levels to rolling resistance. It's just like pre-6UL M.net all over again.
Man I dont know about your car, but on mine the 275s stick like 2 inches past the largest legal tire spats I can make, thats a lot of drag.
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