Monkie

J/K no bashing or anything in here. Yes I did run a 13.1 and I ran it on 10/4. The reason my times were bad last time was because of my slipping clutch so I wasn't putting all the power to the ground. It sucks though, cause the grinding is still there. But I will need a new tranny anyways since mine is only good up to 400rwhp. I did get mad at you because you called me a flat out liar (even in the title of the post) and I never lied about running those times. I even posted it on Corral, I guess you just didn't find it. *srugs* Its aight, its over. Anyways...

The real reason I posted this is to try to give you some tips on launching in your car, it seems you could use some help (no offense taken I hope). But with the Drag radials (first what DRs are they?) set your PSI at 14-18 you will have to work with it to find the right pressure that you like and work well with (I even know someone that launches better at 25psi on DRs ) but as you probably know, you should "pop the clutch to get best times with DRs". The reason I put that in " " is because that is what I have been told by many. Maybe this is true with solid axle but with my IRS I get just as good results with slipping the clutch at 4,500rpms. If you have good DRs, do a good burn out, and launch right you should be able to launch at 3,500rpms atleast on the track. Hope this helped you some and if you want any more advice I might could help you with just ask. I'm not pissed about the last thread, hope you're not either. *shrugs*

12sMustang

I must say, that even though I don't get the best times on DRs, my best times have come from slipping the clutch. I've only cut a best of 1.92s, though, on Nitto 245/50/16s. I played with tire pressure a little and that was at 16 psi. I think I'll try 14 psi next time.

Chris

5.0mustang

I actually don't run Drag Radials anymore, and since then I have learned how to launch the car! Noe on the 245/45/17s I can side step it at 3000 on the street and have it hook well enough for (I am guessing) 2.0s!

You are right, because I did not see it anywhere in the DOHC section, not on the one about you going 13.5 and not on the one where everyone yells at you for "beating" on your car! Unless you posted it somewhere else on 10-05 and I missed it!

I have ET Streets, so mid to low 13s and 1.8 60's will be the norm for me come next season!

Monkie

So you are saying you run better on street tires than DRs? What made you give up on DRs? I like them and I am learning to use them as very good street tires. I heat them up then slip the clutch like I would street tires, just alot higher. You should really try it, it puts you back in the seat like you are taking off in a jet!

Monkie

Chris don't go too low on the psi, I don't think you would want your tires coming off the wheels!

jocww

so is thing over or am i gonna get to see some fights j/p u guys

5.0mustang

I sold them to cobrakiller on here and I basically gave them up because winter was coming, and they haden't impressed me as much as I wanted! I talked to a guy running the same DRs as me only Nittos and he was doing 1.9s by dumping at 3000 in his 95 Cobra, on the same day as me!

I will only run the street tires on the street and the ET Streets at the track, but I have a feeling I could pull better 60's with the 245 street tires (even though I haven't tried yet!)!

I will be doing 4500 launches on the ET Streets if they hook, and that should give me that feeling!!!

5.0mustang

jocww, we will leave the fighting to you guys!!!

CrazyHawaiian

Group hug! Group hug! Since your on the topic of launching manual stangs I guess I'll ask for help too. My stang is an 85 SVO with a T5. Full boost comes on @ 3k rpm. I'm intereted in a two stage rev limiter found in some of the new ignition boxes. Can someone explain how a two stage rev limiter works? I've only heard other SVO guy having good results with them, but I dont know much about it. Thanks!! Also, at what level of power (with high RPM launches in mind) would you sudgest I upgrade from the 7.5 rear to the 8.8. Just curious. Car has not run in the 13's yet but will very soon.

5.0mustang

Dump the 7.5 NOW! They only last into the 14s!!! If they are hit with any traction, they will get destroyed and could ruin your car!

I believe a two step basically allows you to choose your launch RPM. I know a guy who runs a two step for launching, and he sets it for 5400, and he mats the pedal to the floor and the electronics set a rev limiter at his desired RPM!

I am not good at all this crap, so anyone with a better explination or a different pitch in!

tpivette89

i have the BFGoodrich DRs (P275/40ZR17s) and they hook best with a good 5-10 second burnout. i tried to run less than 20psi in them, and the tires rotated around the rim a bit when i did my burnout! so far ive gotten a 1.94 60ft at 25psi. i still havent found the optimal pressure with these tires yet

Monkie

The only time I had ever launched DRs is the 8.3 run and it really was a stupid run. I could have snapped either half shaft right there on the spot. I did a 20 sec burnout (showing off mainly) then pulled up to the first light and the guy that let me borrow them said I had them rippled at the light cause they were so hot. I didn't know DRs rippled like that just sitting there! But I reved it up to 4,500-4,800rpms then just dumped the clutch and they never slipped and I ran a 1.92 I think. But I think its all in practice! I wonder if 1.7 60' is possible on stronger half shafts? I know the IRS is a complete waste at the track but I don't want to go back to solid axle if I don't have to. I like the autocross BMW puts on every year too!

Monkie

Yes, you will be breaking that 7.5 real soon. Get you a 8.8 with 31 spline.

5.0mustang

I did a 5 second burn or so in second gear, and when I came out of it, they never grabbed, like the ET Streets do. They just spun until I let off or clutched in! Mine didn't like the shock of hitting them dumping the clutch! If I had played with lauching it, I bet I could have seen some 1.9s but I was too anxious to sell, because of the ET Streets. I have had on good 60' when bracket racing. I went 1.848 with the ET Streets, with a 4000 clutch dump, and the things on my dash ended up in the back of the hatch! I had to let off (damn 14.0 dial because I ran radials the first round) and went 14.0?? at 98.??! You can only picture the looks on peoples faces when I drove around for a week with those tires on!!! No revs at lights, that is for sure!

I plan on breaking my 8.8 next season, so that 7.5 would definately have to go! I will be going with nothing in the rear but a repacked trac loc!!! 5500 launches, and it may break!

I just hope I can afford it if I do buy another car!!!

rx7speed

with DR I thought they where not really made for doing much of a burnout other then getting junk off the tires..

which will heat them up just fine

least what I heard from I think the BF drag radials or else they just get gummy

5.0mustang

I heard that too, but I noticed when they were cold and driven through rocks, nothing, when they were heated and driven through rocks, they picked them up! (Cobrakiller has been in my driveway, he knows!!!) I did a decant burnout, but they just would not hook for me!!! I also don't think they like the shock of a hard launch like a slick or Street slick! Just my opinion.

CobraKiller

lol ya your driveway is scary. But i've used his old D/R's for some G-tech runs. Granted I don't know my 60 ft's I was hitting 12.9's@110mph on the g-tech. Which if you asks me is showing they're making a huge difference. This is launching the car at around 1500 rpms and just straight out hooking. I really would like to put them back on and try them out at the track in the next few weeks along with a couple of my other mods.

CrazyHawaiian

I know a 8.8 from a 87-93 5.0 will bolt right in. Do you think I'll have to replace anything if I find one in a junkyard? What are the most common gears they come with? Are they all posi? My 7.5 is a 5 lug with awesome brakes (11.25" rotor, 2 piston caliper). What do you think the chances are that I can swap the brake setup to the 8.8's? Thanks!!

CobraKiller

Most common gears are 2:73's i believe or 3.08's either posi or non posi. I'm not sure if your brake setup would be a direct bolt on but i'm sure you could get them to work. I had the 8.8 rear in my lincoln and that had rear disc brakes as opposed to the mustangs which have drum. So if you found one out of a mark VII it would already have the disc brake setup.

5.0mustang

The most common gear is a 2.73 followed by the 3.08! An 8.8 from the junkyard would either need a new traction loc or have the clutches repacked, and the brakes would probably bolt up! I would say you may need new axles though for the 5-lug, but now is the time to buy aftermarket 31 splines! I don't know about the width of the Lincoln rear, whether it is the same or different, however if you are looking to go cheap, look at getting two Ranger driver side axles, these make the Mustang 8.8s 5-lug!

Good luck!

Nic

I had over 100 low 13/high 12 second passes and about 175 total passes on my 7.5 rear and it was still going strong when I pulled it out.

CobraKiller

ya i was thinking that but I didn't say anything

85transamtpi

Monkie,
I do have experience launching my buddies '97 cobra...and let me tell ya, you can not drop the clutch for best times.

Let me go over the car...
4.30 gears
Centerforce
full length headers
off road H pipe
Nittos
line lock

Every time I dropped the clutch the d@mn thing would bog (yes even with the gears). Even with the headers, the car still doesnt have enough low end torque to do that. On the dyno his torque peak wasnt until 5 grand or so.

I got the best results by slipping the clutch (1.8 shorts). When I dropped the clutch I couldnt get better than a 2.0. Sure it was hooking...but it was bogging also.

I know that he has the 8.8 rear, but otherwise I would think everything else would be the same.

-Doug

5.0mustang

My friends 7.5 went at a 14.65 with Mcreary dirt track tires! His car is a 1985 Capri with a carbed 302, a 4-speed, and exhaust! Maybe he had a bad one, but I have seen others go at low 14s! I have seen 8.8s go, but the slowest car that lost an 8.8 I saw was running mid 13s, and he tried launching it on slicks for the first time!!!

My friend at Tasca Day actually sheered his axle splines right off. 5500 cltuch dump and the car never triggered the beams! The axle was walking out of the housing as we pushed it onto the trailer! WE had to jack it up 4 times to push it in, and he has some pics of it too!

Nic

The 7.5" and 8.8" rears use the exact same axles.

Monkie

But the difs are different I think

Nic

Yea, they're different.

12sMustang

5.0 mustang, what went wrong with the mid 13s rear diff. Did the axles snap on it, too? I hear that's the weakest part. I plan to install battle boxes, MM LCA, and a D/S safety loop and start launching on slicks. I've already got Moser 28 spline axles. I certainly hope it holds together. Don't really have the money for a built 9".

Chris

5.0mustang

Yes, both cases in slower cars with 8.8s breaking, it was the axles! I personally am not worried yet, because when we go to the track we are prepared for something like that to happen!

My dad (I know, I know) has been launching with slicks last year and QT Pros this year and he has not ruined anything. The only aftermarket parts in or on the rear is the 3.55s. He recently bought an 8.8 from a low 10 second car that has C-clip elims, spool, 3.55s (he will put 4.10s in) TA cover, and 31 spline axles! This rear alone should get him near that 12 second zone!

12sMustang

Well, I'm glad to hear that. I know moser 28 splines are not much, but they were a lot cheaper and easier than going the 31 spline route, and I'm sure they're an improvement over stock.

I want to be safe into the 11s, with an occasional risk trying to spray into the 10s. Looking for 1.5 60s after slicks and the LCAs.

Chris

5.0mustang

What do you have on the motor? 1.5s are a chore, you would need big power for those times, but anything is possible!

12sMustang

Well, if you know of Kyle from Corral, I've got a very similar setup with a slightly more aggressive cam. I haven't dynoed, yet, but Ed Curtis' customers usually dyno 300+rwhp and ~340 rwTQ. Kyle, Ed Stettin, and several others have managed it on near stock suspension so it is my goal to run 1.5 60's on motor with a sub-12 ET and a 115+ trap speed. Then I'm going ot put on a 75 nitrous kit and up it until I crack into the 10s, or reach the 150 limit of the NOS stage II dry kit.

It all just has to wait for me to go home and work on the car. I don't get much time in between school to work on it. But during the 5 or so weeks I've had time to work on the car in the last year an a half, I've gotten it into the 12s and some pretty decent trap speeds (109.78 best). It'll make it eventually.

Chris

5.0mustang

Definately. I have been reading about guys claiming 1.7 60's with stock goodyears on a stock 99, so I just wanted to see that you werent trying to do this on a stock 5.0! I would bet, being an Ed customer, that you should see the times you want. I have only heard good about those products!

Good luck, and have fun!

Monkie

33 post and no flaming......

Nic

I really regret not going with the FTI combo I had originally planned on

5.0mustang

I know it is funny, and the fact is most of the other flaming has stopped as well. Maybe we can all just get along!!!

Monkie

I'm Mohamed Gandhi









Wait, didn't he get assasinated?

5.0mustang

Yes he did. Shot in the head at point blank!!!

Maybe you should rethink that one again!!! LOL

12sMustang

Don't, you're going pretty damn strong, and your TWs have a whole lotta potential in them.

Chris