New 1/4 Slips From Tonight.

[guccijayda]

Hey guys. I just got back from capitol raceway to get a few runs in. Right when i got there it was about 82 degrees and I ran a 14.3X with 2.24 60' time. Another two 14.3X's with 2.2X 60' times. Best run of the night was 14.23 with 2.26 60' at around 75~ degrees(I had an hour to cool the car off also). Trap speeds averaged 99-100mph.

Before the kooks long tubes, hi flow cats, x pipe, and dynotune, i ran a slower best E.T. of 14.43 but my 60' were faster with a best of 2.17' 60 ft times at approximately 82~ degrees.

I was seriously hoping after all the mods and dyno tune and kooks system i would hit high 13's!! The E.T.s got faster, the trap speeds got faster, but the 60' times got a tad bit slower.

I launched it the same always. I would power brake it to 2k rpms and stomp it. Tires held in fine, no bog, spinning, jus chirp n go. I deflated tires to about 25psi on all runs, and went down from there.

Can anyone chime in on this and give me any input! I'm hoping I have possibility to run faster 60' so i can hit 13's. Thanks!

[MMBLUE]

Originally Posted by guccijayda

Hey guys. I just got back from capitol raceway to get a few runs in. Right when i got there it was about 82 degrees and I ran a 14.3X with 2.24 60' time. Another two 14.3X's with 2.2X 60' times. Best run of the night was 14.23 with 2.26 60' at around 75~ degrees(I had an hour to cool the car off also). Trap speeds averaged 99-100mph.

Before the kooks long tubes, hi flow cats, x pipe, and dynotune, i ran a slower best E.T. of 14.43 but my 60' were faster with a best of 2.17' 60 ft times at approximately 82~ degrees.

I was seriously hoping after all the mods and dyno tune and kooks system i would hit high 13's!! The E.T.s got faster, the trap speeds got faster, but the 60' times got a tad bit slower.

I launched it the same always. I would power brake it to 2k rpms and stomp it. Tires held in fine, no bog, spinning, jus chirp n go. I deflated tires to about 25psi on all runs, and went down from there.

Can anyone chime in on this and give me any input! I'm hoping I have possibility to run faster 60' so i can hit 13's. Thanks!

Smaller rear tires. If you have a set of the stockers the gear will help ya out.

[guccijayda]

my rear tires are 295/45/18. I believe they sit a tiny bit shorter in diameter than the stock 245/55/18's. Do you still think the wide tires are hurting my times?

[justbob]

I think with the headers you lost a little low end grunt, but you sure made it up on the tail end! Nice runs for sure. Just wait till the weather chills out a bit, you'll see a 13.

[guccijayda]

thanks bob!

I just checked all my timeslips, which is like 20 lol.
Before the kooks lth, xpipe,cats, custom dyno tune, my best 60' were 2.1X's. My avg trap speeds were 97mph~. my best 1/4 time was 14.43.

After the kooks lth, xpipe,cats,custom dynotune, my best 60' times were 2.2x. My avg trapspeeds were all between 99-100 mph. my Best 1/4 time was 14.256, and several 14.3X's.

All of my runs were done with the summer heat... 75-85 degrees.

I notice when I launch a little above 2k rpms like 2100-2200rpms, the 60' is actually worse, but wen I launch around 1900-2000k rpms it is my best bet.

Can you guys chime in on your favorite way to launch your n/a rauder with stock torque converters? Any info appreciated

[justbob]

You have been doing the EXACT way I always did. I had huge issues spinning out though. I would tach at 2000 and mash on the last yellow. Never failed the tires would go up in smoke though. Any less and it would bog a little. My car hates me at the track... My best N/A (no mods at all) was 15.5 IIRC.

Even now after all my work, I am stuck with high E.T.'s

[ctrlraven]

It's tough to say since a lot of people's cars seem to really run all over the place. I did 14.25 @ 97-98 mph with a 2.1x 60ft with just a JLT intake, ngk plugs, gms coil connectors, php intake spacer, 2nd set of cats removed and flowmaster mufflers on 255/55-18 (3.50 effective rear gear). I bet once cooler weather comes your times will drop.

[adam/cleveland]

Originally Posted by guccijayda

Can you guys chime in on your favorite way to launch your n/a rauder with stock torque converters? Any info appreciated

I just mash it and go. Any time I tried pre-loading, my times suffered.

Best run is 14.52 @97mph. That is with a Zack tune, K&N CAI, and 285/50s in the rear.

[musclemerc]

Gucci, you expected too much outta the mods you have. I just did the exhaust debate and the horsepower combination threads so other's will have realistic expectations from their choice in mod's. The LT's loose torque on a N/A MM, plain and simple you gained a few HP's but lost alot of TQ. Keep modding, put a spacer on the intake to gain some of the lost TQ back. Too much exhaust has a reverse effect in some cases.

[babbage]

Originally Posted by musclemerc

. The LT's loose torque on a N/A MM, plain and simple.

Sorry I missed that - in the proven combos thread all of the N/A MM's with the highest TQ have Kooks LT's. Could you link this again?

Typically I've seen guys drop .4 to .5 in the quarter after adding long tube headers.

Tips on getting into 13's - is your MAF clean? Are your O2' sensors still good enough for the miles you have on it?

A higher stall TQ converter will gain you in the 1/4. I dropped about .5
I think an intake spacer (slightly longer runner length) will gain you TQ
A ported and polished lower intake will also make a good difference.

Fordnut had this mod on his N/A 4.6 setup and had the highest TQ.

Again I still say that (most of the time) adding LT's should be good for .4 to .5 in the quarter on an N/A setup - all of the mid to high N/A MM's in the 13's (timeslips page) have LT's

[blackbeauty2]

Wait till it hits the 50*'s, you will hit 13.8 easy. Just make sure you stick to the ground.

[Paul T. Casey]

More than just the temps to think about with the weather, how was the humidity? Your slower 60' times also lead me to believe you weren't getting the traction you thought you were. Sometimes you can spin a little and not notice it. Was it a test and tune night, or was there racing going on? Most tracks don't prep as well on T&T nights. Try to run the lanes with the faster cars as they will often prep one lane a little better on T&T nights. Also, as someone else said, find some stock tires. I had my best times with the BFG's. I believe they are a bit stickier.

[blackbeauty2]

Btw my long tubes cut me .3 off my 1/4 mile on the n/a car.
Gucci your times seem right.

[musclemerc]

Alright Babb's. Here's the link: http://www.mercurymarauder.net/forum...ad.php?t=64672

Look at Fordnut's *stock engine* mod list.... That's alot of work to keep the TQ lost with the LT's. Now look at TAF's mod list....Pretty short huh?

As I said with his mods he needs more intake (spacer/P&P upper,lower/60mmTB) to get back the TQ lost from the way too open LT exhaust. Look at Maryland's mod list... Pretty short too huh? The intake made all the diffrence with the TQ lost from the LT's
Now check out Impalaslayer's list LT's and a PSRI he had plenty HP but what happened with the TQ? The short runners.... Maryland kept the stock runner length and kept the TQ.

Originally Posted by babbage

Sorry I missed that - in the proven combos thread all of the N/A MM's with the highest TQ have Kooks LT's. Could you link this again?

Typically I've seen guys drop .4 to .5 in the quarter after adding long tube headers.

Tips on getting into 13's - is your MAF clean? Are your O2' sensors still good enough for the miles you have on it?

A higher stall TQ converter will gain you in the 1/4. I dropped about .5
I think an intake spacer (slightly longer runner length) will gain you TQ
A ported and polished lower intake will also make a good difference.

Fordnut had this mod on his N/A 4.6 setup and had the highest TQ.

Again I still say that (most of the time) adding LT's should be good for .4 to .5 in the quarter on an N/A setup - all of the mid to high N/A MM's in the 13's (timeslips page) have LT's

[guccijayda]

Originally Posted by blackbeauty2

Btw my long tubes cut me .3 off my 1/4 mile on the n/a car.
Gucci your times seem right.

My long tubes x pipe hi flows cats and a dynotune cut me off .2 seconds at best. Around $2,500 to get a .2 faster E.T. and slower 60'...fml... i need a new hobby

Originally Posted by Paul T. Casey

More than just the temps to think about with the weather, how was the humidity? Your slower 60' times also lead me to believe you weren't getting the traction you thought you were. Sometimes you can spin a little and not notice it. Was it a test and tune night, or was there racing going on? Most tracks don't prep as well on T&T nights. Try to run the lanes with the faster cars as they will often prep one lane a little better on T&T nights. Also, as someone else said, find some stock tires. I had my best times with the BFG's. I believe they are a bit stickier.

I'm not sure of the humidity didnt feel too humid at all. no traction issues whatsoever grabs like a hawk! It was a Test and Tune night. Yea once these 295's wear out ill probably go with 255/50/18's or real close to it to see the difference. I just really cant stand the looks of narrow tires on the back of a muscle car though.

Originally Posted by ctrlraven

It's tough to say since a lot of people's cars seem to really run all over the place. I did 14.25 @ 97-98 mph with a 2.1x 60ft with just a JLT intake, ngk plugs, gms coil connectors, php intake spacer, 2nd set of cats removed and flowmaster mufflers on 255/55-18 (3.50 effective rear gear). I bet once cooler weather comes your times will drop.

I'm very jealous of your numbers lol! Which track did you goto and what was the temp? Your sig has 2.0X 60' time on it thats awesome. I wonder if I shift gears manually down the track if it will improve my times because it seems like my gears shift a little too late at redline imo and yanks the crap out of me on each shift lol. Doing 14.2 at around 75 degrees I would hope to see 13's once it gets cooler too!!