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Discussion Starter #1
All at AAM in MD.

stock C5 307
modded C5 327
had air/exhaust/headers
Stock Z06 with 1800 miles 318rwhp
stock Z06 with 4800 miles 334rwhp

the dude with the 334 car had timeslips of [email protected]

How can a car with a RWHP/Lb ratio of 9.3 get a 12.3 when a straight BPU @ 8.6 RWHP/Lb ratio with 400rwhp/3450lbs have a hard time getting below 12.5's?

Is it the Supra suspension?


Also saw a stock '99 M3 lay down 209rwhp if anyone is interested.
 

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A lot of it is what's called area under the curve. The big displacement V8s produce a lot of torque right from idle. You have to get the turbos spooled up on the supra to match it. By then the V8s are going down the track.
 
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Zo6s # doesnt look that impressive. howcome so many supras have gone down racing Z06? I assume those Z06 are eithr stock or lightly moded and supra is BPU.

Jonas
 
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Originally posted by Turk:
<STRONG>All at AAM in MD.

How can a car with a RWHP/Lb ratio of 9.3 get a 12.3 when a straight BPU @ 8.6 RWHP/Lb ratio with 400rwhp/3450lbs have a hard time getting below 12.5's?

Is it the Supra suspension?
</STRONG>
Isaac: I know of at least one Supra ;) that dyno'd at AAM at 409 rwhp and has a timeslip of 11.8 at 120 mph :cool: I know there are other BPUs out there with similar rwhp that have dipped into the 11s or are real close, so it may have something to do with driver too :eek:
 

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Discussion Starter #5
<<I know of at least one Supra that dyno'd at AAM at 409 rwhp and has a timeslip of 11.8 at 120 mph I know there are other BPUs out there with similar rwhp that have dipped into the 11s or are real close, so it may have something to do with driver too

Yep, it's gotta be the driver and area under the curve....good to know some BPU's can break into the 11's with just 400 rwhp.
 

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Discussion Starter #7
<<Tim Maxwell did [email protected] in his 375RWHP supra.

Wow...thats impressive.

the more I think about it, the factors that most determine 1/4 times are:

-- Average RWHP/lb (area under the curve % weight)
-- reaction time
-- 60 foot time (power to the ground)
 

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Originally posted by Turk:
<STRONG><<Tim Maxwell did [email protected] in his 375RWHP supra.

Wow...thats impressive.

the more I think about it, the factors that most determine 1/4 times are:

-- Average RWHP/lb (area under the curve % weight)
-- reaction time
-- 60 foot time (power to the ground)</STRONG>

Reaction time has nothing to do with e.t.
 
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He's right about reaction time. Clocks dont start till you clear the beams. You could wait 5 minutes after the tree fell and still run an 11 second pass.
 

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the more I think about it, the factors that most determine 1/4 times are:

-- Average RWHP/lb (area under the curve % weight)
-- reaction time
-- 60 foot time (power to the ground)[/QB][/QUOTE]

elevation & temp
 

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Discussion Starter #11
Elev & temp...definiely, can't believe I forgot that.

<<He's right about reaction time. Clocks dont start till you clear the beams. You could wait 5 minutes after the tree fell and still run an 11 second pass.

Also I didn't know reaction time didn't mean anything. Why do the timeslips even show them? What use are they as long as you are not bracket racing?
 

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Those numbers on the Z06 seem a bit low. Most seem to be dynoing between 330 and 350. No Mercy's Z06 is at 350 with just and airbox and exhaust. Those cars scream in from 1st gear to about 3rd or 4th. They gearing is stronger than a regularC5in those gears and they pull hard, trust me. I can see the Z06's given alot of BPU supras a hard time, esp if they arent tuned. I had a BPU Supra put down 360 to the wheels untuned. He was running real rich. After an AFC and some tuning he puts out 400rhwp. Major difference. If No Mercy would have run up on that Supra before he was tuned he would have tore him a new one.
 

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Ive dyno'ed 422rwhp BPU w/cam gears,FMIC, and S-AFC,,, and clicked off an 11.71 at 119mph. quite a few flat 12's and 12.1's at 118mph. Its all in getting out of the hole. He's quite right on the ZO6 torque out of the hole. I've never had the chance to run a Z06 or a C5 for that matter, but if it were from a roll, I'd have to say I'd walk right away from a Z06. And I'd say I'd beat him from a dead stop too. The guy with the 12.3 timeslips,, thats a great run,,, and alot has to do with his driving.. I've seen z06's click off high 13's,, all do to the driver of course.
 

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Originally posted by Turk:
<STRONG>Also I didn't know reaction time didn't mean anything. Why do the timeslips even show them? What use are they as long as you are not bracket racing?</STRONG>
They matter for both bracket racing and heads up racing. A 12.5 car with a .900 reaction time will lose to a 12.7 car with a .500 reaction time heads up since the 12.7 car will get to the line first. Bracket racing is similar, but you have to factor the dialin as well. The way to think about it is that reaction time + elapsed time = the time it takes you to get to the finish line from when the light goes green. The e.t. clock starts when the R/T ends.
 
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Originally posted by Turk:
[QB]All at AAM in MD.


stock Z06 with 4800 miles 334rwhp

the dude with the 334 car had timeslips of [email protected]

How can a car with a RWHP/Lb ratio of 9.3 get a 12.3 when a straight BPU @ 8.6 RWHP/Lb ratio with 400rwhp/3450lbs have a hard time getting below 12.5's?

I BELIEVE THE STOCK Z06 IS MORE LIKE 3200LBS DRY. STILL 12.3 SOUNDS REALLY GOOD.

KEN
 

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Originally posted by 94RX7-380:
<STRONG>
Originally posted by Turk:
[QB]All at AAM in MD.


stock Z06 with 4800 miles 334rwhp

the dude with the 334 car had timeslips of [email protected]

How can a car with a RWHP/Lb ratio of 9.3 get a 12.3 when a straight BPU @ 8.6 RWHP/Lb ratio with 400rwhp/3450lbs have a hard time getting below 12.5's?

I BELIEVE THE STOCK Z06 IS MORE LIKE 3200LBS DRY. STILL 12.3 SOUNDS REALLY GOOD.

KEN</STRONG>
Because the Z06 is a lot easier to launch. A V8 with a relatively flat torque curve is lot easier to launch than a car that picks up 150 ft/lbs of torque almost instantly when the #2 turbo kicks in. Don't look at e.t.s, look at mph. A good running BPU car will have a higher mph on average than a Z06. Drag radials do wonders on a BPU car. My car was .75 (11.95 vs. 12.70) of a second faster with the same mph.
 

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Originally posted by Turk:
<STRONG>All at AAM in MD.

stock C5 307
modded C5 327
had air/exhaust/headers
Stock Z06 with 1800 miles 318rwhp
stock Z06 with 4800 miles 334rwhp

the dude with the 334 car had timeslips of [email protected]

How can a car with a RWHP/Lb ratio of 9.3 get a 12.3 when a straight BPU @ 8.6 RWHP/Lb ratio with 400rwhp/3450lbs have a hard time getting below 12.5's?

Is it the Supra suspension?


Also saw a stock '99 M3 lay down 209rwhp if anyone is interested.</STRONG>
Any Supra (except those that have road race modded suspensions) that dynos in the high 300 to low 400 rwhp range has the capability to go mid to high 11s in the hands of a skilled driver. The problem is that Supras are particularly difficult to get maximum performance out of due to the peaky torque curve associated to a small displacement, turbocharged motor. Once proper launch techniques are mastered, Supras will 1/4 mile with the best of them, including F-Bods, Mustangs, Vettes, GNs and even the old muscle cars. The reason Supras are sometimes percieved as not running numbers that people expect for a car with so much HP is that there are very few drivers who have spent the time and energy necessary to do it. Even auto Supras take much more finness to launch effectively than people think.
 

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I'll second that!

Originally posted by supratt96:
<STRONG>Any Supra (except those that have road race modded suspensions) that dynos in the high 300 to low 400 rwhp range has the capability to go mid to high 11s in the hands of a skilled driver. The problem is that Supras are particularly difficult to get maximum performance out of due to the peaky torque curve associated to a small displacement, turbocharged motor. Once proper launch techniques are mastered, Supras will 1/4 mile with the best of them, including F-Bods, Mustangs, Vettes, GNs and even the old muscle cars. The reason Supras are sometimes percieved as not running numbers that people expect for a car with so much HP is that there are very few drivers who have spent the time and energy necessary to do it. Even auto Supras take much more finness to launch effectively than people think.</STRONG>
 
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Originally posted by Eric:
<STRONG>Because the Z06 is a lot easier to launch. A V8 with a relatively flat torque curve is lot easier to launch than a car that picks up 150 ft/lbs of torque almost instantly when the #2 turbo kicks in. Don't look at e.t.s, look at mph. A good running BPU car will have a higher mph on average than a Z06. Drag radials do wonders on a BPU car. My car was .75 (11.95 vs. 12.70) of a second faster with the same mph.</STRONG>

That's absolutely wrong, our car could be pain to launch because of the flat torque curve. why? because you'll spin like crazy(street radial) if you rev it up too high, rev too low and the car will bog big time.
 
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