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 Post subject: Tested the new 468 today
 Post Posted: Sun Oct 31, 2010 7:30 am 
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Headed out to KCIR today for some testing of the new 468. First pass off the trailer I had the front and rear suspension set very conservatively. The car dead hooks and goes 9.91 @ 135 on a 1.35 60 foot. Not much wheelie to speak of. I was like WTF, why is the MPH waayyy off? I was however glad it hooked on such conservative shock settings and better yet didn't go bumper! I put the timing light on it and found the timing was jacked up. I had intended to start out at 38 degrees but somehow it moved on me and was waaayyy advanced. So I set it at 40 and then I readjust the front and rear shock rebound settings. I went ahead and kept 1/4 turn off full loose as a safety factor in the fronts.

Next pass

I ended up missing the 1-2 shift point badly but the car responds favorably to the changes.

DA 2000'
1.32
3.97
6.17 @ 112.09
8.06
9.67 @ 140.23

Next pass, same suspension and tuning just looking to hit the shift points.

Nailed the shift points but the car wheelies too high and bounces and flutters on the landing killing some ET. The car still responded favorably.

DA 1985
1.33
3.88
6.05 @ 112.73
7.94
9.55 @ 140.25

Video below

http://www.youtube.com/watch?v=lUq07aTZ5mg

I get pulled over by tech and told to slow it down. No problem right?

Next pass, pulled out 2 jets from the rear and added another 1/4 turn to the front shocks.

DA didn't record it.
1.31
3.90
6.10 @ 111.63
8.01
9.88 @ 108 on the brakes hard at the 1000'.

Tech motions me over again and tells me the tower says I'm done. I go up to the tower and am told I get one more chance but now, not only do I need to keep it over 10.0 but also over 6.40 in the 1/8th. Load up and head home instead of taking a chance at getting booted.

Overall thoughts

Picked up 27.5 MPH on the back half in 2000' air
Set all new best incrementals in 1000' worse air with minimal tuning.
Car hooked well on every pass.
Came home with no broken parts!
I'm wondering what the little 468 will run in better air with a little more tuning.

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 Post Posted: Sun Oct 31, 2010 8:05 am 
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Location: Pa.
Congrats !!


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 Post Posted: Sun Oct 31, 2010 8:57 am 
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Location: Letellier MB Canada
Very impressive. Can you give details on the engine and combination? I run a 468 too and run very close to your times but with a mutch lighter car with a glide. Makes me think there is a problem with my combination or room for improvement. :-s .

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 Post Posted: Sun Oct 31, 2010 9:11 am 
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NEVER try to slow the car down with jets, good way to burn it up. Put a throttle limiter on it or do the work to get the chassis cert and license.


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 Post Posted: Sun Oct 31, 2010 10:03 am 
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i seen your car last weekend. im the guy with the maroon 70 chevelle in s pro running on the stop. thats very impressive for a 468. i would also like to know what engine combo weight etc


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 Post Posted: Sun Oct 31, 2010 12:02 pm 
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Nice job on the engine Garrett. I saw the dyno info you posted on YB. Your time-slip backs up the dyno #'s.

How or where are you going to tune it farther? Are you going to get a certified cage put in there or only race at non-nhra tracks?

Very impressive running car! =D>

Rick


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 Post Posted: Sun Oct 31, 2010 12:24 pm 
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RT wrote:
Congrats !!


Thanks!

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 Post Posted: Sun Oct 31, 2010 12:27 pm 
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jmarkaudio wrote:
NEVER try to slow the car down with jets, good way to burn it up. Put a throttle limiter on it or do the work to get the chassis cert and license.


I should have explained myself better. I was NOT trying to slow the car down by pulling two jet sizes. I was still looking to pick up MPH in the 1/8th and ET to the 1000' mark at that point in the game. We thought the car was a little rich. My atempt to slow the car down was to hit the brakes at the 1000' mark. Unfortunately, I miscalculated and I needed to bail at the 1/8th.

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 Post Posted: Sun Oct 31, 2010 12:31 pm 
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jmech wrote:
Very impressive. Can you give details on the engine and combination? I run a 468 too and run very close to your times but with a mutch lighter car with a glide. Makes me think there is a problem with my combination or room for improvement. :-s .


3500 lbs with driver all steel

468 ci
1/2 filled block
13.3:1
AFR 305's with a little work
Bullet .738/.738 269/276 @ .050, 108 LSA
Victor Jr with minor porting
HP 1000 4150
Hooker Super Comp 2" headers

TH-400 (home built)
5800 stall ATI Treemaster 8"

4.10's
Caltracs
275/60 drag radials

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 Post Posted: Sun Oct 31, 2010 12:32 pm 
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gnicholson wrote:
i seen your car last weekend. im the guy with the maroon 70 chevelle in s pro running on the stop. thats very impressive for a 468. i would also like to know what engine combo weight etc


Thanks! Combo below. I saw your Chevelle, sweet looking/running ride!

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 Post Posted: Sun Oct 31, 2010 12:38 pm 
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rick360 wrote:
Nice job on the engine Garrett. I saw the dyno info you posted on YB. Your time-slip backs up the dyno #'s.

How or where are you going to tune it farther? Are you going to get a certified cage put in there or only race at non-nhra tracks?

Very impressive running car! =D>

Rick


Thank you Rick. Goals for the car are 1.29 60 foot, 5.99, 9.40's in better air.

I've yet to do ANY tuning to speak of on this combo. The 9.55 was only my 3rd pass on this engine. I plan to run it over at MoKan Dragway the next few weeks. I have much to learn about this combo such as what it wants for jet, advance, and 1-2 and 2-3 shift points. Obviously the dyno gets you close but my engine was dyno'ed in the thin, thin 8000' DA air of Colorado.

I feel the car has 9.40's @ 142 in some crisp air. The DA was the pits at KCIR yesterday and the baro was dropping as the day went on. The 9.55 pass was ran in 72.5 degrees, 26.8% humidity and 29.89 baro.

This winter I'll be looking at having a CM cage installed.

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 Post Posted: Sun Oct 31, 2010 12:55 pm 
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Location: Letellier MB Canada
How mutch power and torque did it make on the dyno?

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 Post Posted: Sun Oct 31, 2010 1:04 pm 
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Here are two of the pulls below.

It made a nice little "shelf" of power from 6500 to 6900. Peak torque was 667 @ 5500 and my converter previously flashed to 5800 RPM on the old combo.

http://i1016.photobucket.com/albums/af2 ... oTest2.jpg

Best pull
http://i1016.photobucket.com/albums/af2 ... oTest3.jpg

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 Post Posted: Sun Oct 31, 2010 1:36 pm 
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Thanks, i'm impressed.

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 Post Posted: Sun Oct 31, 2010 7:18 pm 
 
Great job well done =D> Looks like the devil is in the details :- With the right encouragement your builder may create more HP next year [-( When you become bored again Good luck.


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