April 02, 2020, 01:08:03 PM

Author Topic: 8 Second FB  (Read 555 times)

Offline freeskier7791

8 Second FB
« on: January 24, 2020, 01:21:41 PM »
so me and my buddy got talking, and we are thinking of building an 8 second FB.  He was willing to front the money, I would do a Youtube build series on it, and then hopefully we could sell it at the end for a profit.  It could potentially help show my skills to attract more customers.

Anyone think this is possible?  I know I can get an FB down to 2400 lbs pretty easily.  Basic outline is below

FB shell
NHRA Cage
5.3 or 6.0 truck motor
Big Turbo
Drag fuel cell
Injectors and tune for E85
Ford Explorer 8.8 solid axle
4L80E with stall converter
https://www.youtube.com/thedriftingdad
1985 Mazda RX7 GSL Drift Car

CCVT

Offline digitalsolo

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Re: 8 Second FB
« Reply #1 on: January 25, 2020, 10:06:18 AM »
Id look at a TH350 vs a 4L80, but its definitely possible.
Blake MF'ing McBride
1988 Mazda RX7 - Turbo LS1/T56/ProEFI/8.8/Not Slow...   sold.
1965 Mustang Coupe - TT Coyote, TR6060, modern brakes/suspension...  project car
2016 BMW 428i xDrive Gran Coupe - Completely stock...ish

Offline freeskier7791

Re: 8 Second FB
« Reply #2 on: January 25, 2020, 10:35:59 AM »
Id look at a TH350 vs a 4L80, but its definitely possible.

That is a valid point, I was only thinking 4L80 because you can get one out of a 2500 chevy truck with 6.0.
https://www.youtube.com/thedriftingdad
1985 Mazda RX7 GSL Drift Car

CCVT

Offline digitalsolo

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Re: 8 Second FB
« Reply #3 on: January 25, 2020, 11:38:39 AM »
A 4L80E weighs about 50 lbs more than a TH350, and you have to control it.    Manual RVB in a TH350 with a few upgrades inside and it should be fine in that light of a car, plus you can do a cheap standalone engine management if you want and not worry about tranny control.    Torque converters for a '350 are easy to find, too.

FWIW, I'd look REAL hard at a Holley Terminator or an MS3 for that.    The level of boost + lack of room for "oops" means that a stand alone is a better engine control option than a stocker in my opinion.

You need c clip eliminators and at least a mini-spool and welded tubes + a back cover with reinforcements in that rear.   I'd consider doing a brace setup to keep the tubes from moving around.   I broke the tubes out of my 8.8 SRA in my FC on a dead hook once.
Blake MF'ing McBride
1988 Mazda RX7 - Turbo LS1/T56/ProEFI/8.8/Not Slow...   sold.
1965 Mustang Coupe - TT Coyote, TR6060, modern brakes/suspension...  project car
2016 BMW 428i xDrive Gran Coupe - Completely stock...ish

Offline Supe

Re: 8 Second FB
« Reply #4 on: January 27, 2020, 06:48:39 AM »
You could easily have that in the 8's at 2400 lbs with something like a cheap S480.  I'd just back half the car, personally.  You can still use the 8.8 if you want, just put 9" ends on it.  Will you make money off of it?  Probably not, but you probably won't want to get rid of it, either...

Offline freeskier7791

Re: 8 Second FB
« Reply #5 on: January 27, 2020, 07:39:56 AM »
A 4L80E weighs about 50 lbs more than a TH350, and you have to control it.    Manual RVB in a TH350 with a few upgrades inside and it should be fine in that light of a car, plus you can do a cheap standalone engine management if you want and not worry about tranny control.    Torque converters for a '350 are easy to find, too.

FWIW, I'd look REAL hard at a Holley Terminator or an MS3 for that.    The level of boost + lack of room for "oops" means that a stand alone is a better engine control option than a stocker in my opinion.

You need c clip eliminators and at least a mini-spool and welded tubes + a back cover with reinforcements in that rear.   I'd consider doing a brace setup to keep the tubes from moving around.   I broke the tubes out of my 8.8 SRA in my FC on a dead hook once.

Thanks for the input!  original plan was stock computer, but I would definitely look at standalone stuff.  Good tip on the rear end I would definitely weld the tubes and brace, I wonder if a 9" or something would be a better idea?

You could easily have that in the 8's at 2400 lbs with something like a cheap S480.  I'd just back half the car, personally.  You can still use the 8.8 if you want, just put 9" ends on it.  Will you make money off of it?  Probably not, but you probably won't want to get rid of it, either...

I could back half for sure, but if I am doing that maybe just start with an FC instead?  I know actually making the power needed is going to be the easy part, suspension and rear end will be much harder
https://www.youtube.com/thedriftingdad
1985 Mazda RX7 GSL Drift Car

CCVT

Offline Supe

Re: 8 Second FB
« Reply #6 on: January 27, 2020, 12:01:38 PM »
Other than overall width/cockpit space, I don't think an FC buys you anything over an FB once you start cutting, other than better wheel options up front.  Not in a straight line at least.

Offline digitalsolo

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Re: 8 Second FB
« Reply #7 on: January 27, 2020, 12:33:01 PM »
Thanks for the input!  original plan was stock computer, but I would definitely look at standalone stuff.  Good tip on the rear end I would definitely weld the tubes and brace, I wonder if a 9" or something would be a better idea?

I'd stay with an 8.8" personally.   It's a lot lighter unless you want to go fab9 or something $$$.

Regarding computer, think about this:

Stock Computer (free to 100 dollars) + HP Tuners (200 for credits, 600+ if you need to buy it) + standalone boost controller (250-300) + wideband controller (250-300).   -> 900-1300 dollars, give or take.

vs.

Terminator X-Max, with all that built in, plus intelligent engine safety features (fuel pressure, oil pressure, lean protect, etc).

At 1000-1300 dollars for a Terminator setup, you'll get there FAST with a stock computer, especially if you need to buy HP Tuners.
Blake MF'ing McBride
1988 Mazda RX7 - Turbo LS1/T56/ProEFI/8.8/Not Slow...   sold.
1965 Mustang Coupe - TT Coyote, TR6060, modern brakes/suspension...  project car
2016 BMW 428i xDrive Gran Coupe - Completely stock...ish

Offline freeskier7791

Re: 8 Second FB
« Reply #8 on: January 28, 2020, 01:17:05 PM »
I'd stay with an 8.8" personally.   It's a lot lighter unless you want to go fab9 or something $$$.

Regarding computer, think about this:

Stock Computer (free to 100 dollars) + HP Tuners (200 for credits, 600+ if you need to buy it) + standalone boost controller (250-300) + wideband controller (250-300).   -> 900-1300 dollars, give or take.

vs.

Terminator X-Max, with all that built in, plus intelligent engine safety features (fuel pressure, oil pressure, lean protect, etc).

At 1000-1300 dollars for a Terminator setup, you'll get there FAST with a stock computer, especially if you need to buy HP Tuners.

My buddy has HP tuners, but yes we would need to pay for credits.  I know Sloppy Mechanics did a similar build with a terminator setup and TH350. 

Light weight is going to be key here as well.  I have access to a free Dana 60, but again super heavy.   
https://www.youtube.com/thedriftingdad
1985 Mazda RX7 GSL Drift Car

CCVT

Offline MPbdy

Re: 8 Second FB
« Reply #9 on: January 28, 2020, 07:17:38 PM »
No one mentioned Skinnies yet?  All the pictures are broken

https://www.norotors.com/index.php?topic=3322.15

Offline freeskier7791

Re: 8 Second FB
« Reply #10 on: January 30, 2020, 11:13:54 AM »
No one mentioned Skinnies yet?  All the pictures are broken

https://www.norotors.com/index.php?topic=3322.15

that is pretty incredible!
https://www.youtube.com/thedriftingdad
1985 Mazda RX7 GSL Drift Car

CCVT

Offline gnx7

Re: 8 Second FB
« Reply #11 on: February 02, 2020, 03:37:12 PM »
8's would be a cakewalk if you can make it 60ft.  The 4L80E is something like 250lbs!  Either a TH400 or a glide.  The TH350 internals are tiny and won't hold up to what a cheaply built TH400 can do. 

if you have the $ twin S366's or s366 sx-e turbos would make that thing fly in comparison to a single S480.  About 2x the price though
'93 FD: 441ci/AllPro LS7 heads/intake en route, T56 Mag, 8.8" IRS, HolleyHP, DavisTechTC 10.32@137mph cats/full exhaust. 165mph 1/2 mile (old LS7)
'93 FD LS9 turbo, T56 Mag, Samberg 8.8" solid axle, 9.35@163mph 197mph 1/2 mile
`69 Chevelle: alum 5.3, GTS76 turbo, ChiseledPerf A/W, T56 Magnum,Ford 35 spline 9".CTS-V interior http://www.norotors.com/index.php?topic=18234.0
old yellar....440rwhp/FD sold but not forgotten: http://www.ponycars.net/scc.htm
I sell new T56 Magnums/McLeod clutch/T56 rebuild kits/Holley EFI/FIC injectors and all BrianTooleyRacing parts.  norcalmotorsport@gmail.com

Offline freeskier7791

Re: 8 Second FB
« Reply #12 on: February 04, 2020, 04:00:01 PM »
8's would be a cakewalk if you can make it 60ft.  The 4L80E is something like 250lbs!  Either a TH400 or a glide.  The TH350 internals are tiny and won't hold up to what a cheaply built TH400 can do. 

if you have the $ twin S366's or s366 sx-e turbos would make that thing fly in comparison to a single S480.  About 2x the price though

Yes it definitely takes a lot of money to get a car fast in those first 60'.  I would love to find a cheap TH400 and build it.  And twins may be out of the budget right now, but maybe later on.
https://www.youtube.com/thedriftingdad
1985 Mazda RX7 GSL Drift Car

CCVT