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Old 11-06-2019, 03:29 PM   #91
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Default Re: Activation of 2nd N20 Stage

Thx Will...appreciate the help!
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Old 11-07-2019, 01:25 AM   #92
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Default Re: Activation of 2nd N20 Stage

We finished up the tranny repairs & re-installed it tonight (Glide with 1.58 1st gear), with the same Neal Chance converter. New Pump, Drum with 10 disks, Megaband, Clutches, etc. We used PTC hydraulic fluid (vs. Type F), so this may tighten the flash stall a tad. We adjusted the Pressure Regulator, & will test the pressure at the track on Friday, before making some test Runs. I'd like to see about 225# of pressure at 3800 2 step, & maybe a bit higher going down track.

Since this thread started with the question about the "Activation of the 2nd Stage", we will move the 2nd stage activation to .40, from .60 it was at SGMP. At this point on the previous baseline 2 stage Run, the ACC topped out & fell off at .40, along with the ERPM flat lining until about .85. We hope this helps the early ACC, & 60'. We will see, but there are a few variables that have changed...275 tire vs. 295 (effective 7% more gearing, & equivalent to a 4.00 gear from actual current 3.60 gear). The LR has been slashed from 10* flat for .8 seconds & then ramped back in by 1.35 seconds...to 5* flat for .5 & then ramped back in by 1.00. Way more power early in the Run. The Retard Delay was moved from .00 to .20, & this should make the launch a bit sportier. And of course, the track is not likely to be as tight as SGMP. We'll see.

Thanks all for the helpful comments.
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Ricochet Racing
'69 Camaro Yenko SC - Back Half / NHRA 25.2 / Stock Front Suspension - Fulton 718 & N20
337-781-4443
[email protected]
Lafayette, LA 70508

FOR SALE: $1,950
Stainless Headers (under car) 2 1/4" & 4" Merge Collector, by The Fab Shop for tube chassis car, BBC;

FOR SALE: $5,950
3 Stage n20 CFE Intake. Dual Split Carbs by David Cook DC Carbs. Was on 5" BS 738 BBC 11.36 deck with Sonny Leonard Heads;
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Old 11-10-2019, 07:46 PM   #93
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Default Re: Activation of 2nd N20 Stage

Nothing good / meaningful to report.

Friday air was -800' DA with 35 GOW, but mist in the air, & track 55*, way too cold. Too much wheelspeed on 26n jet at .35. Loaded up not to pile the car up.

Made it to the semis on Saturday without a single clean Run. Had to peddle, & fortunate to have two Rounds with RT .006 & .007 (I am not that good). Lost in semis leaving with total timing at 6* flat for .80 & ramped to 1.35, with 26n 32n & 35n on at .00, .80, & 1.20. Lost the tire with too much wheel speed at about 1.15 just before 3rd kit came on. -850' & GOW 35. Ran late at night (got home at 3:00 AM), & Track temp 52* with oildowns on & off, & moisture on the cars. Not a good formula to go down the track with a 28" tire.

Lessons Learned:

1- 275 tire from our previous 295 tire is 7% more rear gearing...a lot.

2- Our local track on this day was no SGMP track for sure.

3- A working / fresh fresh tranny with much higher pressure has a big impact on effective power to the ground (DRPM).

4- A big CID motor with a big stroke (718 4.61 bore x 5.375) makes massive TRQ with very little timing, & this is problematic on a shite track in great air on a 28" tire.

5- We are a "work in progress" on the 275s, but that's all good.

We will look at our 4 link settings again (now 39" & 10" with bottom bar UP 9*), & decide if a change is needed. We adjusted the front shock Extension & front Travel (looser) as the day went on, but that did not help. We also ran the bottle pressure about 835# to take initial power away at launch.

Thanks.
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Ricochet Racing
'69 Camaro Yenko SC - Back Half / NHRA 25.2 / Stock Front Suspension - Fulton 718 & N20
337-781-4443
[email protected]
Lafayette, LA 70508

FOR SALE: $1,950
Stainless Headers (under car) 2 1/4" & 4" Merge Collector, by The Fab Shop for tube chassis car, BBC;

FOR SALE: $5,950
3 Stage n20 CFE Intake. Dual Split Carbs by David Cook DC Carbs. Was on 5" BS 738 BBC 11.36 deck with Sonny Leonard Heads;
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Old 11-13-2019, 08:35 PM   #94
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Default Re: Activation of 2nd N20 Stage

^ Follow up comment. We have decided that it is about impossible to "manage" power on a 718 cid 5.375 stroke 5" Bore Space motor in air that is -850' on a shite cold 52* track on a 28" tire. And leaving at 5* total timing is not very healthy for the motor.

So, we are installing a Lingenfelter n20 progressive controller (NCC-002) to manage the power. Any comment or experience with this n20 progressive controller is appreciated.

Will keep all advised how this goes, when we can get it installed, & weather & track conditions are OK to test again.
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Ricochet Racing
'69 Camaro Yenko SC - Back Half / NHRA 25.2 / Stock Front Suspension - Fulton 718 & N20
337-781-4443
[email protected]
Lafayette, LA 70508

FOR SALE: $1,950
Stainless Headers (under car) 2 1/4" & 4" Merge Collector, by The Fab Shop for tube chassis car, BBC;

FOR SALE: $5,950
3 Stage n20 CFE Intake. Dual Split Carbs by David Cook DC Carbs. Was on 5" BS 738 BBC 11.36 deck with Sonny Leonard Heads;
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Old 11-14-2019, 05:44 PM   #95
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Default Re: Activation of 2nd N20 Stage

your braver than I Fofo..i refuse to take the big tires off..aborted runs are not for me.lol..

never ran that controller but I read you need to use drivers so you don't burn it up..i use a Daytona sensors 2 stage progressive that I program with the lap top..been working great for 2 years.keep us posted!!!
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Old 11-14-2019, 08:33 PM   #96
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Default Re: Activation of 2nd N20 Stage

Thx Will. The 275 tire drives like a dream, once you get it off the starting line. We hope the Progressive is the answer to more consistent launches, on less than ideal tracks. Can't race SGMP-tight tracks every weekend. Will keep you advised.
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Ricochet Racing
'69 Camaro Yenko SC - Back Half / NHRA 25.2 / Stock Front Suspension - Fulton 718 & N20
337-781-4443
[email protected]
Lafayette, LA 70508

FOR SALE: $1,950
Stainless Headers (under car) 2 1/4" & 4" Merge Collector, by The Fab Shop for tube chassis car, BBC;

FOR SALE: $5,950
3 Stage n20 CFE Intake. Dual Split Carbs by David Cook DC Carbs. Was on 5" BS 738 BBC 11.36 deck with Sonny Leonard Heads;
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Old 11-15-2019, 11:17 AM   #97
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Default Re: Activation of 2nd N20 Stage

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Originally Posted by fofo View Post
Thx Will. The 275 tire drives like a dream, once you get it off the starting line. We hope the Progressive is the answer to more consistent launches, on less than ideal tracks. Can't race SGMP-tight tracks every weekend. Will keep you advised.
Yeah i'm kinda like Will on them small tire radials and i'm looking at trying the big radial
but been kinda Leary looking at the cars that get out of the groove any kinda way they wreck. Fofo you have any experience with the 32x14 pro radial?
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Old 11-15-2019, 12:42 PM   #98
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Default Re: Activation of 2nd N20 Stage

Quote:
Yeah i'm kinda like Will on them small tire radials and i'm looking at trying the big radial
but been kinda Leary looking at the cars that get out of the groove any kinda way they wreck. Fofo you have any experience with the 32x14 pro radial?

The 32x14 PBR will likely be our next tire, coming from a 33x10.5W. Been mid-low 1.1 60's so far with this old ladder bar car and its still leaving flat and looking for more power.
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Old 11-15-2019, 02:04 PM   #99
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Default Re: Activation of 2nd N20 Stage

I have experience with the 33x105Wx16 MT, the MT 315 Radial, the MT 295 Radial, & now just starting with the MT 275 Radial. The Radials drive like a dream down track, & are faster. Caveat is that they do not like wheel speed early, & you need a good track for the Radial, i.e. "radial prepped", like at least 375 to 400# of track grip. Remember, the 275 vs. the 295 equates to 7% more effective gearing, i.e. more wheel speed. And our track was 52* with the DA -850...not going to happen with a big motor, even at 5* total timing. Learning...
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Ricochet Racing
'69 Camaro Yenko SC - Back Half / NHRA 25.2 / Stock Front Suspension - Fulton 718 & N20
337-781-4443
[email protected]
Lafayette, LA 70508

FOR SALE: $1,950
Stainless Headers (under car) 2 1/4" & 4" Merge Collector, by The Fab Shop for tube chassis car, BBC;

FOR SALE: $5,950
3 Stage n20 CFE Intake. Dual Split Carbs by David Cook DC Carbs. Was on 5" BS 738 BBC 11.36 deck with Sonny Leonard Heads;
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Old 11-15-2019, 09:13 PM   #100
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Quote:
Originally Posted by Jp outlaw View Post
Quote:
Yeah i'm kinda like Will on them small tire radials and i'm looking at trying the big radial
but been kinda Leary looking at the cars that get out of the groove any kinda way they wreck. Fofo you have any experience with the 32x14 pro radial?
I am looking at that pro bracket radial myself. Currently running 32'14 e.t drag slick


The 32x14 PBR will likely be our next tire, coming from a 33x10.5W. Been mid-low 1.1 60's so far with this old ladder bar car and its still leaving flat and looking for more power.
Looks promising
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Old 11-15-2019, 09:14 PM   #101
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I am looking at the pro bracket radial myself. Currently running 32x14 e.t. drag slick
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Old 11-16-2019, 05:37 PM   #102
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Default Re: Activation of 2nd N20 Stage

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Originally Posted by Jp outlaw View Post
The 32x14 PBR will likely be our next tire, coming from a 33x10.5W. Been mid-low 1.1 60's so far with this old ladder bar car and its still leaving flat and looking for more power.
Will be on that tire when the new season starts and can't wait to see if it works as good as M\T says.
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Old Today, 07:38 AM   #103
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Will be on that tire when the new season starts and can't wait to see if it works as good as M\T says.

I'm still in season down here. Got a race Thanksgiving weekend, another the following weekend, then two in Jan. - We stop through the middle of summer when it gets too hot to suit up, lol.

Thinking over the Christmas holiday we will probably be due a new set and they will most likely be the 32x14.5 PBR. Same weight as what we're running now, only slightly less roll-out and less growth on the big end would help us as well.


I'm gonna make this ol girl go 1.0's and a mid 4 if not just to be ornery, lol. 2x3 car with ladder bars, shocks old enough to vote, and a conventional headed 600ci BB with just a 2.3" valve @ 2840#. Already been 1.12 and 4.8's at 144+ with just one system on super soft.
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Old Today, 09:10 AM   #104
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Default Re: Activation of 2nd N20 Stage

^ Good luck to you. We might be able to get one or two more track trips, depending on the weather, before the season ends.
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Ricochet Racing
'69 Camaro Yenko SC - Back Half / NHRA 25.2 / Stock Front Suspension - Fulton 718 & N20
337-781-4443
[email protected]
Lafayette, LA 70508

FOR SALE: $1,950
Stainless Headers (under car) 2 1/4" & 4" Merge Collector, by The Fab Shop for tube chassis car, BBC;

FOR SALE: $5,950
3 Stage n20 CFE Intake. Dual Split Carbs by David Cook DC Carbs. Was on 5" BS 738 BBC 11.36 deck with Sonny Leonard Heads;
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Old Today, 12:10 PM   #105
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Default Re: Activation of 2nd N20 Stage

Will be looking at the PBR 14X32's this coming spring. How are they compared to "normal" 14x32's? Any track results? Going on car in avitar with DESTROKE Fulton 706 to 675 inches and currently 2 Induction Solution FOGGERS stages (maybe a 3rd for plenum if needed). BUT I'm using a converter-driven 4sp Lenco as it's a streetcar. 2900lbs range. So following how Ronnie does with the 2nd stage activations too.

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