No propshaft racing results

[It's just a six]

Went to the track yesterday. 3200 ft altitude
I wanted to try running it w/no propshaft, (have not put it back in since I dynoed it) & since my friend let me borrow his 28x12.5 M/T ET street tires I thought,, why not.

Well the results,, not good......

Heated the tires a lot.

Boosted to about 4-5 psi,,Spun really bad & bammm, massive wheel hop!! (sorry,no broken rear end) Had to let off then roll back into it.
2.148 60 FT
13.104 @ 104.780 21 PSI

Second run,,, 2.121 60 FT Same senario. Spinning, wheel hop, letting off back on it.
13.135 @102.839 21PSI

I drove my Sy there 50 miles each way.
I was mainly there to help my friend unload/load his street car from his trailer & for support.
He bought my old Maliubu SS w/a 406 SBC Air gap intake etc, made 350 HP same car I dynoed w/my Syclone.
He ran a best of 13.1 @ 105.3 MPH w/a very easy launch & spinning the tires to a 2.1-.2.3 60 FT
Had a good times hanging out w/friends!!!!

 

[Black Knight]

Re: No propshaft racing results

Is your time in the timeslip page current? Running a 12.2?

If so that is a big drop off

 

[It's just a six]

Re: No propshaft racing results

Is your time in the timeslip page current? Running a 12.2?
I think it was done in 1998-2000?


If so that is a big drop off

I was two wheel drive,,,,, 3200 ft altitude track,,,,, everyone runs slower at altitude.

It was for fun,,, not for trying to beat my personal best.

I do not have cal tracks or anything like that.

If you ever run two wheel drive with sticky tires,,,,, one wheel spins first,,, gets grip ,,then the other tire that was not spinning ,,starts to spin,,,after that both wheels will spin, it is not a posi.

And that is how it launched,one legger, only one tire spun,then stopped got traction ,,got massive wheel hop and so-on.

It was not an enjoyible launches!!

Reason I posting this is not to get flammed!!!!

Just ,, I am passing along information to this forum,,, so if anyone was thinking about doing what I did, (running two wheel drive w/sticky tires), basically,, don't do it.

If you do want to try it, ,,,get a real posi unit (a stronger rear end would be a good idea) & run cal trac bars.

Two cents!!!!

 

[Black Knight]

Re: No propshaft racing results

Wow Rick you read into that way too far!

I wasn't bashing you in any way, shape, or form! I was just amazed at the time difference, I would have guessed that going to 2WD and slicks would keep the times relatively close.

Where is the amazed and shocked smilely?

 

[LIL QIK]

Re: No propshaft racing results

:shocked!:

 

[It's just a six]

Re: No propshaft racing results

Wow Rick you read into that way too far!

I wasn't bashing you in any way, shape, or form! I was just amazed at the time difference, I would have guessed that going to 2WD and slicks would keep the times relatively close.

Where is the amazed and shocked smilely?

Not a problem.

I was just thinnking here goes another flame war, & that is not what I wanted.

BTW,,,M/T ET streets are DOT groved tires. They do not hook up as good as slicks.

They work ok ,but as with my friends car they have their limitations.
He cannot use his trans break w/those tires, but he can w/slicks.

 

[myclone]

Re: No propshaft racing results

one wheel spins first,,, gets grip ,,then the other tire that was not spinning ,,starts to spin,,,after that both wheels will spin, it is not a posi.

No flames intended just be aware that the above is how the factory gov lock works (dont ask me why GM uses it) and it will explode very easily due to that fact.

 

[It's just a six]

Re: No propshaft racing results

No flames intended just be aware that the above is how the factory gov lock works (dont ask me why GM uses it) and it will explode very easily due to that fact.

Thanks,
I do know it has the gov lock, I just made that statment explaining how bad traction is with the front prop shaft out.

I was thinking people do not know it is not a posi unit.

I do not plan on running two wheel drive mod again, it was just for fun.

 

[chelo]

Re: No propshaft racing results

Too bad you didn't have your propshaft with you. It would have been nice to see a back too back run. One with and one without the propshaft.

 

[It's just a six]

Re: No propshaft racing results

Too bad you didn't have your propshaft with you. It would have been nice to see a back too back run. One with and one without the propshaft.

I ran it other times,but not that same day & ran 12.5 @ 105 12.6 @ 104

 

[AUSyTyIN]

Re: No propshaft racing results

Wow, talk about a dead thread :lol:

I was actually wondering the same thing though, so thanks for bringing this back up :tup:

 

[chelo]

Re: No propshaft racing results

Thanks for the info. A sy without a prop shaft can get pretty crazy in the street. I would imagine the track was well prep.

 

[NOJIMMY]

Re: No propshaft racing results

Thanks for the info. A sy without a prop shaft can get pretty crazy in the street. I would imagine the track was well prep.

...I find this thread facinating. In my "head", I start with the assumption that
a.) Awd should rule over 2wd on the street, but 2wd (with sticky tires) rules on strip due to less front end weight, gear loss, and possible xfer case removal;
b.) Awd (say 60/40) transfers front end traction to rear end under normal slippage, however
the front diff is open (1 wheel traction) and the rear diff is non-posi as well which is not like
switchable 4wd traction;
c.) A Syclone differs from a Typhoon in that the wheelbase is longer, and there is little weight
over the bed so weight transfer, and suspension tuning, is necessary to avoid wheel hop,
spinning, and left-to-right/front-to-back suspension overloading.

...So, does this thread indicate that
d.) Awd with caltracs and a real posi-diff rear "could" benefit from rear slicks and normal street tire fronts?
e.) Or, Awd with caltracs and a real posi-diff rear "could" benefit from having slicks front and rear both?

When I use the term "slicks", generally Im ignoring the differences between radials, bias ply,
Dot certification, grooved/non-grooved treads, 15" vs 17+" rims, lightweight vs heavy rims, etc.

I dont know if anyone with a real rear posi (or spool) having proper suspension parts
(caltracs, shocks, springs, or rear linked setup) has tried this experiment
-Awd (front, rear, or front/rear) slicks vs 2wd (removed propshaft) with rear slicks
to see advantages/disadvantages at a strip. My intuition tells me more traction is
better at the strip, and that front/rear slicks should rule (and that propshaft removal
at 25lbs should be minimal with regard to ets on Awd). And finally that the real 2wd trucks
get their advantage from removal of the front diff weight and xfer case at the strip.

But could a 2wd rear slick`d real posi truck beat an Awd 4 slick`d real posi truck on the street?
...dunno (guess we`ll have to line Woz`s Ty up against Gerbers to see...grin)

-Larry Brown

 

[QWERTYphoon]

Re: No propshaft racing results

This is a great post, I can't wait for some more input! I always wondered what a difference it would make. I wouldn't run slicks in the street so I am more interested in regular street tire results. Pulling front diff and Xfer and getting the weight out the front and putting in a rear posi, anybody have a typhoon like that? With stock engine?

 

[abqsy2194]

Re: No propshaft racing results

i made a stupid decision to run dr's on all 4 on the street......one little spill in the road throws the whole truck off....was crusing with no propshaft for a while after it broke and it ws not good didnt get traction till abpout 40mph

 

[PJ2397SY]

Re: No propshaft racing results

if anyone is still reading this
i normally run 13.4-13.6 consistently when last sunday great track prep i had the front shaft out and drag radials 14.4 first run heated up in the box a little longer 2nd run 14.2 still spun her balls off going back to awd. need to order another set of rears dr are now slicks

 

[Foot Performance]

Re: No propshaft racing results

igoing back to awd.

good idea :tup:

 

[Nova67ss]

Re: No propshaft racing results

Robert tryed the FWD blues on his Bad Ass truck,

and he also went back to AWD

Belive me, those Sy´s are made for AWD..

 

[It's just a six]

Re: No propshaft racing results

if anyone is still reading this
i normally run 13.4-13.6 consistently when last sunday great track prep i had the front shaft out and drag radials 14.4 first run heated up in the box a little longer 2nd run 14.2 still spun her balls off going back to awd. need to order another set of rears dr are now slicks

Sounds about right.
I was normally running 12.5-12.7 range.
Two wheel drive 13.1

 

[alwayscode390]

Re: No propshaft racing results

so expect between a 1/2 second to a full 1 second loss from AWD to 2wd?! That is huge!!! ---