How high can you go?
#41
FYI 8500 is not my target for peak power. 8500 is where I want my "safe" operating conditions to extend to.
#42
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
#43
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
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
350HP 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....
#46
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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.
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.
#47
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.
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.
Last edited by patsmx5; 12-02-2008 at 03:20 PM.
#48
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pauls gains say a lot...only change here was the IM, 70mm TB, and some fueling.
FM saw the same gain when developing the IM themselves:
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
FM saw the same gain when developing the IM themselves:
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
#51
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.
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:
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