Out of Fuel and Gear... suggestions?

[red]

Fuel: The single Focus fuel pump is maxed out (no flames). I'm planning to add a boost-a-pump for now and to use a twin GT pump setup when I upgrade the supercharger. Any issues with going this route (particularly,the Focus + BAP)? For those with a twin pump setup, what options did you consider and why did you choose your setup?

Gear: With the 4.10s and shorter tires, I will run out of gear in the 1/4 mile. I have a used set of 3.55s I am planning to replace my 4.10's with, which will give me 125 MPH (versus 108 MPH) at red line in third on my drag radials. Additionally, it'll make highway driving tolerable (the exhaust is unbelievably loud now) and give the car better street manners. To anyone with a Trilogy in the mid 400's range and stock converter, what 60' times were you running (please include tire type, tire size, and gear ratio). Yes, I've looked at the timeslips page and dragtimes, but not everyone posts there or includes all the details.

Thanks! :cool:

[CRUZTAKER]

Gear: With the 4.10s and shorter tires, I will run out of gear in the 1/4 mile. I have a used set of 3.55s I am planning to replace my 4.10's with, which will give me 125 MPH (versus 108 MPH) at red line in third on my drag radials.

Are you still using those odd sized slicks at the track?

I use 28" tall (normal) slicks at the track with 4:10's and have no issues with max et speed what so ever.

With the correct tire size and 4:10's I do not redline on the highway until well into the upper 130's.

Ditch those rediculous 26" tall wheels and drive on!

[NATEHAWK]

I use 305 45 18 MT ET with 4.10's.....Had a RT of .503 on a .500 tree..60' ft of 1.678 12.21 ET with a 111.30 mph trap speed....I will be in the 11's come march and that 60ft time will drop some more..

[KillJoy]

Single GT Pump

Boost-a-Pump

42lb Injectors

500RWHP, no fuel issue.

:up:

KillJoy

[justbob]

Stock trilogy car and chip with 26" ET street
R/T -.007
60' 1.81
12.92 at 106

Hope that helps.

[RR|Suki]

get a 28" tall tire, end of the problem :D

[justbob]

With stock bfg's i ran

60' 2.1 (smoke show)
13.3 at 104

[CRUZTAKER]

Bob...it's not a stick problem...it's a rev problem.

Try those tires out on a long stretch and see what you accomplish.
It's bad enough the 4:10's limit us to about 140 mph, but add short azz tires to the equation and it gets terribly worse.

You won't see pro racers running tires shorter than the fronts, much less 2" shorter.

It was a bad choice of wheels and need to be remedied.

[RR|Suki]

Bob...it's not a stick problem...it's a rev problem.

Try those tires out on a long stretch and see what you accomplish.
It's bad enough the 4:10's limit us to about 140 mph, but add short azz tires to the equation and it gets terribly worse.

You won't see pro racers running tires shorter than the fronts, much less 2" shorter.

It was a bad choice of wheels and need to be remedied.

what RPM are you using as the limit? @ 6250 I figure it to be a little under 130

[justbob]

Bob...it's not a stick problem...it's a rev problem.

Try those tires out on a long stretch and see what you accomplish.
It's bad enough the 4:10's limit us to about 140 mph, but add short azz tires to the equation and it gets terribly worse.

You won't see pro racers running tires shorter than the fronts, much less 2" shorter.

It was a bad choice of wheels and need to be remedied.
Agreed, but i have 3.55's and with these it works out to being a 3.73 at the track. The single best i ever did on stock tires w/ perfect hook up was a 13.1 at 104 i'd have to look it up but i believe my 60' was right at 2.0 That was a perfect run. Two weeks later with the shorter tires she ran the 12.92 at 106 with the 1.81. This was done so i could keep the r's low on the highway. I will honestly say i can't remember the rpm difference but i will agree with you they were higher with the shorter tires. But there was a huge difference in launch. My car has never been over 106 at the track yet so i'm quite far away from redlining.

[FordNut]

Twin Cobra pumps with BAP was fine 'til mid-600 hp range, now I'm running twin GT-40 pumps with BAP & upgraded FPDM. I would imagine you could get a little more headroom with your current Focus pump by adding a BAP, but in the long run you're gonna have to upgrade the pumps.

[red]

You won't see pro racers running tires shorter than the fronts, much less 2" shorter.

It was a bad choice of wheels and need to be remedied.
I won't speak for others, but for me the rears were not 2" shorter than the front and it was not a bad choice. I intentionally went that route N/A to put me as close to the top of 3rd as possible when going through the gates and to improve the 60', of which, I was running 1.8s. I made the choice of supplementing the gear ratio via tire diameter so that I could maintain decent highway RPMs when on street tires as opposed to say going with a 4.56 gear. The new 9.5" rims are wearing 27" tires, so with the 3.55's, I'll be at an effective ratio of 3.82. I have three sets of wheels, so I have other choices, but I plan to run the 27" tires daily. At that, even if I run the 27" tires at the track, my rev limit and the 4.10's will put me at only 113MPH.

[red]

what RPM are you using as the limit? @ 6250 I figure it to be a little under 130
With 4.10's, a 26" hanging diameter tire (~25" loaded), and a 6250 redline, the MPH will be about 114.

[red]

Twin Cobra pumps with BAP was fine 'til mid-600 hp range, now I'm running twin GT-40 pumps with BAP & upgraded FPDM. I would imagine you could get a little more headroom with your current Focus pump by adding a BAP, but in the long run you're gonna have to upgrade the pumps.
Brian, thanks for the input. I only need a little bit more out of the pump, so I'll plan to stick with the boost-a-pump for now. A supercharger upgrade will definitely necessitate more delivery. Where did you mount the BAP and control?

[red]

Thanks everyone for the responses!

[Zack]

6250 redline? HAH! Thats your problem.
I used to rev my STOCK motor to 7000 while at the track.

As for the Fuel, just do it right the first time....
upgraded FPDM, wiring upgrade and twin GT pumps. Dont put a BAP on unless it is necessary.

[2ndMDRebel]

On my Vortech setup I ran the smaller (25.7") drag radials which put me going through the traps at 6500rpm in 3rd with OD off and 119/120mph with 4.10 gears. Now I'm running larger drags (28") and hit the traps at 119/120mph right around 55-5700'ish rpm in 3rd with OD off.

I was getting all that Vortech had to give! The new setup isn't breaking a sweat... just needs some tweaking.

[magindat]

30" tires + 4.10's = effective 3.90

255 walbro was tuned into the 450's before backing off

I get nada for traction on these tires, but blew traps at 109 after restarting twice.

[FordNut]

Brian, thanks for the input. I only need a little bit more out of the pump, so I'll plan to stick with the boost-a-pump for now. A supercharger upgrade will definitely necessitate more delivery. Where did you mount the BAP and control?

I mounted the BAP behind the trim panel in the trunk, near the FPDM. Mine is wired pre-FPDM with a relay and wiring direct from the battery/fusebox. The control knob is mounted near the subwoofer.

[FordNut]

Be sure to get the 40 amp BAP.

[red]

I mounted the BAP behind the trim panel in the trunk, near the FPDM. Mine is wired pre-FPDM with a relay and wiring direct from the battery/fusebox. The control knob is mounted near the subwoofer.
I wound up mounting the BAP outside of the trim panel; not ideal, but doesn't look bad (it's red) and is out of the way. The knob is installed directly in front of the subwoofer assembly. Thanks for the reply.

[red]

Be sure to get the 40 amp BAP.
Thanks for the heads up! KB recommended the 20 amp for single pump applications, so I went with it. It'll just have to get upgraded later.

[red]

As for the Fuel, just do it right the first time....
upgraded FPDM, wiring upgrade and twin GT pumps. Dont put a BAP on unless it is necessary.
I hoped to do it differently, but was out of options, so I went with the BAP. The pump only needed a little assistance above 5500rpm.

[justbob]

This is all i did, and then ran the wires down behind the seat and across the sill plates.
http://i300.photobucket.com/albums/nn19/marauding4life/halloween08035.jpg

[red]

This is all i did, and then ran the wires down behind the seat and across the sill plates.
I suppose I could have mounted it there too, which would have at least been hidden from sight. Oh well. When I get the 40 amp, I'll find a better spot for it. Thanks for the picture!

[justbob]

no problem:)