• When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

Just need a bit more

ozzymaxwedge

Active Member
Local time
6:34 AM
Joined
Nov 21, 2022
Messages
27
Reaction score
50
Location
Australia
Hi all,
My son and I have a 70 4 door Aussie Valiant that we drag a bit, at the moment we are setting up for our Australian version of your Drag Week, ours is Drag Challenge.
the event will be end of Jan over 5 race days with over 1000 miles of street in it. We last done the event in 2019 and finished 2nd in class just, so looking for a bit more.
The class we run is Small 9" Radial Naturally Aspirated Street registered.
Car is 3650 lb and runs 1.40 60', 110 mph 660' and 9.82 136 mph. 528 wedge, 12.6-1 KB, Molnar crank, 360 cfm indy sr's, 280 108 with about 700 lift solid roller with Huges 1.6 rockers, matched Indy tunnel with 2 new 950 APD carbs.
Gearbox is kitted 727 with a good TCE 5000 convertor, 3.5 gears, it flashes to 5000 rpm off the foot shifting at about 6800 and traps at 7000. All this is fresh.
Can anyone see some improvement to be had ? We Know there is a few guys running in 70's and would love to keep up with them.
Will put pics up next post.

Cheers
 
527B9922-758E-42E3-8D86-02D50413C6B5.jpeg
B7827159-23AC-4D9D-83C7-A11A6D1D9D4B.jpeg
 
Might have to re look at shaving some weight?
 
I would experiment with total timing to see if
it would tolerate a bit more. Carb tuning and
maybe where cam is put in at. Also shift points.

Do you have a racepak or any data acquisition
system on board?
 
I would experiment with total timing to see if
it would tolerate a bit more. Carb tuning and
maybe where cam is put in at. Also shift points.

Do you have a racepak or any data acquisition
system on board?
Have done the timing many times, likes 37 , we are locked at that.
Last time out we picked up 1 mph with some extra jet, we have an Innovate dual 02 sensor gauge sitting around 13-1 most of the track. This is as highly tech as we get
 
More gear and a looser converter will get you there easy.
Doug
 
More gear and a looser converter will get you there easy.
Doug
OK Doug you have my attention. Can you elaborate ? So more gear as in go to 3.7 from 3.5 ? Converter go to 5500 from 5000 ?
We did have 3.7’s in it but was trapping at nearly 7400 so went with 3.5.
Give us some numbers please Doug.
 
OK Doug you have my attention. Can you elaborate ? So more gear as in go to 3.7 from 3.5 ? Converter go to 5500 from 5000 ?
We did have 3.7’s in it but was trapping at nearly 7400 so went with 3.5.
Give us some numbers please Doug.
No way it should be at 7000@136 with a 3.55. I'm assuming it has a 275 MT radial? i'm guessing 89"cicumference. They have close to zero growth. That puts it over 17% slip. Part of that is not enough gearas it's probably still accellerating well past the 1/4 mile finish. More gear will actually lessen the slip. However the converter itself may not be very effecient. What RPM does it fall back to on the shift? I would've never believed my 15-1 580" motor would need a 6200 converter to run its best.
Doug
 
No way it should be at 7000@136 with a 3.55. I'm assuming it has a 275 MT radial? i'm guessing 89"cicumference. They have close to zero growth. That puts it over 17% slip. Part of that is not enough gearas it's probably still accellerating well past the 1/4 mile finish. More gear will actually lessen the slip. However the converter itself may not be very effecient. What RPM does it fall back to on the shift? I would've never believed my 15-1 580" motor would need a 6200 converter to run its best.
Doug
Doug we are only on a 235/60/15 so more like 26” or 81.5 circumference
 
Ok that makes more sense. Then the gear is close. I'd bet there is something to gain in the converter though.
Doug
Ok so do you think I talk to the converter shop about something with more flash ? Like 5500-5800 maybe ?
 
Converter guys are smarter than me. But I'd bet 5800-6000. Someone there can make you the proper piece.
Doug
 
FIDDY SHOT !
that should fix it Al .
Weight seems a little high , is that with driver ? My Satellite is 3643lbs without me , 3790 with . Thats with a World heavy iron block . Glass bonnet , front bumper heater/demister and no rear seat . You should have a race seat , aluminium ?
TCE are ok , so talk to them .

Tex
 
OK Doug, thank you, will talk to them today
Hi Tex, hope you are well, we are only playing naturally aspirated mate , NA 235 Radial and yeah we are with TCE
 
Auto Transport Service
Back
Top