I just got off the phone with a guy that runs a shop that sells suspension parts. He said that it was near impossible to run 11's on street tires. What do you think?

As stated in other posts, before practicing launching, I have g-teched at a 12.8 @ 117.

I have not had the zz4/tpi/supercharger combo truly tuned for best performance yet, and I have sfc's for suspension and that is it.

I am asking if you all think it is possible for me to get 11's on street tires with the following changes:

1. Tuned setup
2. Practice launching
3. Custom ram-air that utilizes my 3" cowl hood
4. LCA's, Torque Arm and Relocation Brackets

I have to feather super lightly for about 3-4 seconds as it is. Ideas greatly welcomed! Thanks!

 

the big indicator for how much time you are going to drop is really your 60' times. without knowing what sort of 60' you are getting now we don't know how much room there is for improvement.

 

You definitely need to lower your 60' times to make the car get into the 11's. The parts you mentioned - TQ arm, LCAs, relocation brackets, and subframes will give you the initial bite to take off harder and put more power into it earlier, which is what makes the car get there faster.

Adding power won't help much - you need to harness it as much as possible to make it into the 11's.

 

There was a thread in Power Adders a couple of weeks back linking to a magazine story of a guy with a twin turbo early Mustang, fuel injected. He runs 215 section street tires and gets into the 11s.

Granted it is a lighter car, but he did a lot of research studying the launching Gs of street/hot street cars.

The most important considerations that he spoke of were weight transfer (of course) and tire compound. I think he changed to Comp T/A Drag Radials (don't quote me here) and got 60 ft times closest yet to drag slicks.

Unfortunately the article isn't on the magazine's website anymore or else I'd link you. Maybe someone else read it?

 

I don't recall what month's issue of Hot Rod this is in, but there
is a guy who built a ZL-1 clone for the Factory Appearing Drags
(and he is currently the fastest I believe) who ran a 11.48 in the
quarter on F70-14 polygrass repops. I found a website for it but
it didn't give any E.T.'s for the FADrags, but here's a similar one
where they are required to run stock type tires.

http://www.yearone.com/bristolbash/b...tshootout.html

The point is, if it can be done on ployglas repops, it can be done on our radials.

Now for the bad news--the RWHP & TQ figures are in the 600's for the cars that can run these times on these tires. Of course, the higher the peaks are, the better (for tractions sake).

The 'ZL-1' had a 2500 RPM convertor, TH400 with a mild shift kit (again, tires can't handle too aggresive shifts), 12 bolt with 4.33 gears. Of course, unless the engine has identical HP & TQ curves and the car weighs the same as this guy's 69, the above parts
many not suit the combo--the key is to not only have the power
but also to get it to the ground effectively with driveline parts that
compliment the motor. As nice as it would be for all of us to afford
to bolt an all aluminum big block into our third-gens, I don't expect to see it! But, there are other ways to get there and
it is possible for our third gens to do 11's on street tires.

 

I'll second that statement...And I know you wanna use street tires but I would still recommend running drag radials or ET Streets. (they're still street tires, right?) All the suspension mods won't help if your tires aren't up to it. There are plenty of 3rd and 4th gens running quick times on stock suspensions and just ET Streets.

Even though it's cool to run 11s on street tires you'll need to make a LOT more power to make up the time lost from spinning at the launch. You'll probably be losing to less powerful cars at the track simply because they can hook up with less power. Then you have to play catch up, but usually by then it's too late.

 

If I launched on slicks a few times, would that for sure spell death to my rear end? I have a 700r4 tranny by the way.

 

I share your concern! If the launches don't get it, the 1-2 shift might.

It's safe to say that you could get a certain number of 11 sec runs out of a stock or even a well-prepped 7 5/8" rear, but it wouldn't be a large number.

 

rusty, are you referring to using slicks? I think I would be happy with just a run or two

...nevermind! I see what you wrote now I'm gonna try some slicks sometime I think just to see how it goes.

 

I got a buddy that can run high 10's on a 275 60 15 drag radial.
Bolt on suspension only.
He's got about a 1.54 60' on the radial tires.

Mustang man though, go figure....

 

Yeah, I think we should clarify "street tire". A drag radial is a street tire, and there are cars running high 8's on them...I think you mean a real regular duty street radial.

From my drag strip experience, I think it can be done. Just gonna need some time...tune, tune, tune

 

Thanks guys for your responses! Judging from what I am hearing from other folks, the typical rule of thumb is every 1/10th you drop from your 60 ft is worth 2/10ths in the 1/4. Is that right? So, if I go from a 2.3 to a 1.6, does that mean it's worth 1.4 seconds?

 

No - that is not correct. Every tenth (0.1) you drop in the first 60ft is worth a tenth and a half (0.15) in the quarter.

... and yes, 11's is very hard to hit unless you either have rediculous power with street tires OR you have OK power and can hook at the track.

Tim

 

From what I have read in the mags, the guys running the low et's in the classes where they are limited to a drag radial of a 8 or ten inch width are also running timing computers that pull a bunch of timing out of the motor to kill off some of the low end torque off the line.

Eric

 

He's a moron. Tell him to go a track sometime. I've seen numerous Vipers, Z06's, C5's, two 03 Cobras, Lightnings, and countless other modified cars run non drag radial street tires well into the 11's.

 

Guys running the NMCA Traction Advantage class are in the 8's on
BF Goodrich Drag Radials.
Example:Troy Pirez's 70 Nova, with Cal-Trac bars and adjustable shocks on a mono-leaf equipped rear. 8.621@160mph, 1.32 second 60 foot!
(BFG P31560R15 Drag Radial)
They are all using Nitrous-delay setups that bring the 400hp shot on slowly, so the tires don't get hit too hard.
-Rich-

 

Its not impossable to hit 11s on street tires. Ive done it. 11.87@ 118mph and a 2.2 60ft on 245 BFG comp TAs (not drag radials). So it is possable if you have enough power and lite foot to keep from burning your tires half way up the track (done that a few times).

 

That sounds incredible!!! Was that at the track or a gtech?

 

It can be done. There is a Formula around here that rans deep in the 11's on Nitto Drag radials. It has a NOS'd 350 with a t350 behind it. It has a few suspension parts, but nothing that is exotic.

As for a true radial, my Toyota clipped a few hundreds into the 11's on a pair of Eagle GT +4's...

 

My times were all done on the track. The only suspention mods I had done were spohn LCA relocation brackets boxed stock LCA's and a two inch drop(which accually made launching worse but hey you gotta look good too) I havent even put my subframes in yet.