Originally Posted by patsmx5
(Post 336475)
But you will be fighting a loosing battle trying to make power to 8500 RPMs. See your first post where you said " Yes, I know we don't produce loads of power at the top end but we could." I say, you can not.
FYI 8500 is not my target for peak power. 8500 is where I want my "safe" operating conditions to extend to. |
Originally Posted by patsmx5
(Post 336477)
You have said this before and I will once again call BS. Post some dyno plots of a BP 1.8 holding power flat to 8200 RPMs. I wanna see this. Only way I could see this happening is if you were adding more and more boost after 7K.
EDIT: Just found this chart. Ignore the red line as this was playing with a Nitrous controller, but the Blue shows me revving to 7700ish and still a pretty good amount of hoursepower. This chart is with a T3/T4 54 Trim Turbo and a 1994 head at the time. I eventually got a T3/T4 50 Trim and some more guts and used to rev the motor higher and higher. The 50 trim turbo responded much better than the 54 trim http://www.m-tuned.com/Marc/m1/450hp.jpg |
Originally Posted by Marc@M-Tuned.com
(Post 336485)
Call it what you want.. I would be within 10-15 hp of peak power until 8200rpm and still making good steam. I needed the extra gear as a shift to 5th just slowed the car down to much.
EDIT: Just found this chart. Ignore the red line as this was playing with a Nitrous controller, but the Blue shows me revving to 7700ish and still a pretty good amount of hoursepower. This chart is with a T3/T4 54 Trim Turbo and a 1994 head at the time. I eventually got a T3/T4 50 Trim and some more guts and used to rev the motor higher and higher. The 50 trim turbo responded much better than the 54 trim http://www.m-tuned.com/Marc/m1/450hp.jpg 350HP :ne: 500 HP You made peak power before 7K and it started dropping after that. You didn't rev to 8500 or 8200. But yeah when you find the 500 HP plot with it holding power flat to 8200 I'd like to see it. Till then.... |
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perspective?
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sorry miss-post
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that wouldn't change the dynos :)
what both plots are missing is a good intake manifold and cams.... Markp's setup was: Built bottom end, shim under buckets, titanium retainers, and dual springs with 70# pressure seated 180# open. T3/T4 50 trim. and I guess I'm confused, when someone says they hold power to redline, I assume TQ not HP. |
Originally Posted by Braineack
(Post 336533)
that wouldn't change the dynos :)
what both plots are missing is a good intake manifold and cams.... Markp's setup was: Built bottom end, shim under buckets, titanium retainers, and dual springs with 70# pressure seated 180# open. T3/T4 50 trim. and I guess I'm confused, when someone says they hold power to redline, I assume TQ not HP. |
pauls gains say a lot...only change here was the IM, 70mm TB, and some fueling.
http://www.boostedmiata.com/dynos/pa...vs_paul300.jpg FM saw the same gain when developing the IM themselves: http://www.boostedmiata.com/dynos/fl...kemanifold.jpg The "power" doesn't level off, it keeps climbing. I'd say this would give you a better chance of peaking HP at 8-8.5K |
I like paul's dyno graph. I just wonder what my 99' w/ all my headwork would do with a badass intake manifold. And boost.
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his curve is pretty stellar, I hope mine looks as good.
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Originally Posted by Big Boy
(Post 336443)
Thanks for the data. Do you know if he went with aftermarket cams in order to shift the power band a bit?
I am designing my car around the purpose of road racing. By road racing I mean a road race course. ... There is the case when you are in a turn and run out of revs midway through the turn. As to Road Racing, that is exactly what I have been building the car for. Daily-Driver/Road-Race/Time-Trial hybrid as it were. - Yet I am running a quick spooling turbo, factory 5-speed and have *never* run out of revs in a corner. - If I even think I'll need more tach, I'll shift (up or down appropriately) *prior* to getting into the curve... By swapping the rear diff to a 3.63, I have a gear limited top speed north of 160mph, boost from 2500 to redline and can cruise at 120mph at under 6K. To give an idea, here's the dyno plot at only 7psi: |
Originally Posted by Braineack
(Post 336643)
FM saw the same gain when developing the IM themselves:
http://www.boostedmiata.com/dynos/fl...kemanifold.jpg |
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