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  4.11's and 8.5 inch slicks???

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Author Topic:   4.11's and 8.5 inch slicks???
65_289
Gearhead

Posts: 761
From:
Registered: Jul 2001

posted 11-27-2001 05:21 PM     Click Here to See the Profile for 65_289   Click Here to Email 65_289     Edit/Delete Message   Reply w/Quote
Anyone running both of these? My dad was talking to the mechanic, who said that I shouldn't go over 3.80's unless I get wider tires. He said I will either spin or have to launch so low with 3.80's that I would bog. He also said I would hit 5th gear BEFORE thr 660' mark. Is he on crack? Right now, I am barely shifting into 3rd before the end, but I that is due to some heavy bogging. Lemme know!!!

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1965 Coupe, Tremec 3550, Steeda Tri-Ax, Cable Clutch conversion, 3.25 gears, Ford XB3 longblock, x303 heads, B-Cam, 9:1 comp., Tri-y headers, cut-outs, Ford Racing high-torque mini-starter, Pertronix Ignitor & Flamethrower coil, 650 double pumper, Edelbrock RPM intake, K&N air, Holley electric fuel pump & AFPR, dual 2-chamber Flowmasters, Summit 3-way fronts, Rancho 5-way rears, 5-leaf springs, Chrome Export Brace, Griffen Radiator, Comp. Eng. subs.

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steve'66
Gearhead

Posts: 8826
From: Sonoma,CA,USA
Registered: Mar 2000

posted 11-27-2001 05:26 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
Yes, he's on crack.

4.11s with a 26" tall tire will hit 110-112mph in 4th (1-1 ratio) at 6,000 rpm. It's just right, It will hit the tires hard, but you can make it hook! Good luck,

SteveW

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7DMACH1
Gearhead

Posts: 2359
From: PHILA. PA.
Registered: Feb 2001

posted 11-27-2001 05:33 PM     Click Here to See the Profile for 7DMACH1   Click Here to Email 7DMACH1     Edit/Delete Message   Reply w/Quote
Yes he's on crack. I run 26x8.5 slicks on my 86 Capri. I launch at 5800 rpm and shift at 5800 rpm. With 4.10 gears I go through the traps about 5400 rpm at 107 mph 12.86 et.

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RAY . FLY THE FLAG, SHOW THE WORLD WE ARE PROUD AMERICANS!70 MACH 1 351C NOW 408 STROKER 4SPD.
86 MERCURY CAPRI 5.0 RUNS 12.86 @107 1.65 60 ft.
2001 LINCOLN LS V8 1997 MUSTANG
SHOW THE WORLD, LIGHT A CANDLE.
http://www.geocities.com/slariviere/7DMach1.html

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Moneymaker
Administrator

Posts: 25883
From: Lyons, IL, USA
Registered: May 99

posted 11-27-2001 06:40 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
We used to run those tires with 4.10 gears on Tony's Capri also when it was a street car. Shifted at 5200 and went through the traps at 5400. Nice all around tire for a medium combination with 4.11 gears.

------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00 & '01
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link

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chips67
Gearhead

Posts: 651
From: louisville, ky, usa
Registered: Jul 2001

posted 11-27-2001 10:10 PM     Click Here to See the Profile for chips67   Click Here to Email chips67     Edit/Delete Message   Reply w/Quote
alex, should i go with a 26 inch tall tire next time then and drop the 28 inch mickeys? also, did you notice 7dmach1's launch rpm with that 60ft time? [email protected], is everybody launching like that these days without even trying? im starting to feel like one of those special people who was born without an @sshole.

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67 coupe, 650dp and rpm intake on 5.0 with afr 165 heads, 4 speed, 4.11's.....best so far is [email protected] in 1/8 mile with 1.79 60ft. time.

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n2oMike
Gearhead

Posts: 2419
From: Spencer, WV
Registered: Jan 2001

posted 11-28-2001 10:05 AM     Click Here to See the Profile for n2oMike   Click Here to Email n2oMike     Edit/Delete Message   Reply w/Quote
I'm curious as to what 7DMach1's Capri weighs.. It probably has a short tire and makes plenty of midrange power. Those FOX bodied cars all tend to launch well with a few key modifications. The extra low 1st gear of their T5 or Tremec trannies doesn't hurt either. Depending upon trans, it's either 3.35, 2.98, or 3.27(tremec). Wide ratio Toploaders have a 2.78. Close ratio units have a 2.32 first gear.

To get your car to 60ft with your conventional clutched toploader, you'll need to launch it WFO. I launch mine at redline with the throttle on the floor (2-step) to get 1.65 60fts off the bottle.

Make sure you have jet extensions, and your floats are adjusted correctly.

If you are now using 28" tires, going to 26" treads will give you a lot more gear... and make the car accelerate out of the hole quite a bit better. I would HIGHLY recommend the shorter tire. Load (weight) transfer will also be improved.

Launching with the nitrous on makes things even better.

Good Luck!

------------------
Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/carbedstangs/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367

[This message has been edited by n2oMike (edited 11-28-2001).]

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7DMACH1
Gearhead

Posts: 2359
From: PHILA. PA.
Registered: Feb 2001

posted 11-28-2001 01:00 PM     Click Here to See the Profile for 7DMACH1   Click Here to Email 7DMACH1     Edit/Delete Message   Reply w/Quote
Mike, the car weighs whatever a stock one does. I would say about 3400. It has 3.35 first gear. 4.10 rear. Sway bar removed, frame ties, Southside lower arms, hydraulic shocks on rear [cheapo 8.95 junk], 4 cyl rear springs and quad shocks removed. Front is all stock. RAY

------------------
RAY . FLY THE FLAG, SHOW THE WORLD WE ARE PROUD AMERICANS!70 MACH 1 351C NOW 408 STROKER 4SPD.
86 MERCURY CAPRI 5.0 RUNS 12.86 @107 1.65 60 ft.
2001 LINCOLN LS V8 1997 MUSTANG
SHOW THE WORLD, LIGHT A CANDLE.
http://www.geocities.com/slariviere/7DMach1.html

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n2oMike
Gearhead

Posts: 2419
From: Spencer, WV
Registered: Jan 2001

posted 11-28-2001 04:29 PM     Click Here to See the Profile for n2oMike   Click Here to Email n2oMike     Edit/Delete Message   Reply w/Quote
7DMach's overall first gear ratio is 3.35x4.10 = 13.74

Chip67's overall first gear ratio is 2.78x4.11 = 11.43

7D's 26" tire gives him even more gear over chip67's 28" unit.

To give you an idea of how different the 1st gear and tire diameter changes things... even with the same differential ratio:

mph = (rpm x tire diam)/(336 x gear ratio)

7D's car will go 33.8 mph, and Chips67's car will go 43.8 mph at 6000rpm in 1st gear!

That's a BIG difference!

That small ci engine needs about all the gear it can get out of the hole... Chip67, put a shorter tire on the car and launch it like you mean it!

Good Luck!

------------------
Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/carbedstangs/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367

[This message has been edited by n2oMike (edited 11-28-2001).]

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Moneymaker
Administrator

Posts: 25883
From: Lyons, IL, USA
Registered: May 99

posted 11-28-2001 05:22 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
There you go Chip. The low gear coupled with the 4.10's gives a tremendous mechanical starting line acceleration advantage as Mike says. Good traction doesn't hurt either. Also, a stock 86 5.0 Capri weighs in the neighborhood of 3100 lbs WET! We have to add a TON to Tony's car to get it to our NHRA/IHRA P/SA minimum weight of 3450 lbs. That is after we have installed a full 8 point cage and sub frame connectors. Hell, our 89 GT convert only weighs 3300 lbs without the ballast.

------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00 & '01
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link

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7DMACH1
Gearhead

Posts: 2359
From: PHILA. PA.
Registered: Feb 2001

posted 11-28-2001 05:43 PM     Click Here to See the Profile for 7DMACH1   Click Here to Email 7DMACH1     Edit/Delete Message   Reply w/Quote
Back in 1988 we rented the track for the day. I ran 13.58 102mph. My friend {who is a lot older than me} who is the " Ford Guru" of this area told me when we got home. "You drive like a [email protected]@@@". "If you're afraid to break it, leave it home. The next time we went instead of launching at 3500 my friend asked me where is you max HP. I said 5800, he said that's where you lauch it, if it doesn't hook fix it. I ran 12.86 at 107 all day long. My first pass was 12.91, I made about 7 more passes, 12.88, 12.87 12.86. 12.90, 12.86, 12.87, 12.86. Not bad for an old man in a stick shift. So if you're going to the track don't waste the trip, or leave it home. Alex you say my Capri is only 3150lbs, even with my FAT [email protected]@ in it, LOL RAY

[This message has been edited by 7DMACH1 (edited 11-28-2001).]

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65_289
Gearhead

Posts: 761
From:
Registered: Jul 2001

posted 11-28-2001 06:33 PM     Click Here to See the Profile for 65_289   Click Here to Email 65_289     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by 7DMACH1:
Yes he's on crack. I run 26x8.5 slicks on my 86 Capri. I launch at 5800 rpm and shift at 5800 rpm. With 4.10 gears I go through the traps about 5400 rpm at 107 mph 12.86 et.


What kind of cam & heads you got in that thing? I am looking for 12's, and I hope I have enough with these GT-40X heads and 224*, .480 lift cam.


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7DMACH1
Gearhead

Posts: 2359
From: PHILA. PA.
Registered: Feb 2001

posted 11-28-2001 07:00 PM     Click Here to See the Profile for 7DMACH1   Click Here to Email 7DMACH1     Edit/Delete Message   Reply w/Quote
My engine is a Dynosour. It was built in 1988 with the first cam and head made for a roller motor. The heads are 87's with 1.60 and 1.94 stainless valve made by Kauffman Products. The cam is a Comp made to kauffmans specs. It's 270/280 adv. and .500/.528. Installed at 112 center line. I don't remember the number at .50 or the lobe seperation. Chris Kauffman was the only game in town then. I was a Motorsport dealer and talked to Don Walsh and he told me then that SVO had no idea when they would be making anything and that Kauffmans stuff was good. For the era it was. There weren't many Stangs or Capris w/o power adders going 12's. I'm sure with todays tecnology of cams and heads the car would go a 12.20. I know kids that have Trick flow heads and a cam, intake t/b, mass air and the are going high 11's and low 12's. RAY

------------------
RAY . FLY THE FLAG, SHOW THE WORLD WE ARE PROUD AMERICANS!70 MACH 1 351C NOW 408 STROKER 4SPD.
86 MERCURY CAPRI 5.0 RUNS 12.86 @107 1.65 60 ft.
2001 LINCOLN LS V8 1997 MUSTANG
SHOW THE WORLD, LIGHT A CANDLE.
http://www.geocities.com/slariviere/7DMach1.html

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chips67
Gearhead

Posts: 651
From: louisville, ky, usa
Registered: Jul 2001

posted 11-29-2001 12:36 AM     Click Here to See the Profile for chips67   Click Here to Email chips67     Edit/Delete Message   Reply w/Quote
hey, you know that whole first gear ratio thing never crossed my mind! give those fox body cars the rear suspension, and lower overall gears, no wonder they beat me out of the hole! i always run them down, but i want 7's so bad. i know if i could 60 like mike, id be "knock, knock, knockin' on 7's door". i wanna bet kicked off the track for something other than a leaking waterpump gasket. there are obviously other issues with my chasis, launching above 4500 still blows the et streets off the rims, so i gotta figure that crap out. next tire will be a 26 inch slick if my wife will let me get the bart rims. if not, another set of et streets i guess.

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67 coupe, 650dp and rpm intake on 5.0 with afr 165 heads, 4 speed, 4.11's.....best so far is [email protected] in 1/8 mile with 1.79 60ft. time.

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7DMACH1
Gearhead

Posts: 2359
From: PHILA. PA.
Registered: Feb 2001

posted 11-29-2001 04:48 PM     Click Here to See the Profile for 7DMACH1   Click Here to Email 7DMACH1     Edit/Delete Message   Reply w/Quote
Like we say in the business,"Drive it like it's a rental car". RAY

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RAY . FLY THE FLAG, SHOW THE WORLD WE ARE PROUD AMERICANS!70 MACH 1 351C NOW 408 STROKER 4SPD.
86 MERCURY CAPRI 5.0 RUNS 12.86 @107 1.65 60 ft.
2001 LINCOLN LS V8 1997 MUSTANG
SHOW THE WORLD, LIGHT A CANDLE.
http://www.geocities.com/slariviere/7DMach1.html

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