Slow .. I mean verry slow 5.0 !!

[MAD FORD]

Hi there


I was happy that I'm going to test my car on the track today and I hoped that I could achieve a good time; but unfortunately I didn't.

my best time at the track was 13.4 @ 106


this is my car's combination


90 Mustang GT

308CI
12:1 CR
Z303 "CamZilla"
Ported TFS TW heads
Performer RPM
Holley 4150 650 CFM
MSD 6AL & Distributor
1in spacer
FlowTech LT
3" X-pipe
3" Flowmaster Muffler
Melling HV oil pump
Double Roller Timing Set
holley fuel regulator 7.5 psi
Fel-Pro Head Gasket
C4 & Shift Kit & 9" TC
3.73
MT ET Radial

so guys I need your advices, what is the problem? is it the carburetor, the intake manifold, or the intake ?? or something else ?


how much the fuel pressure should be ?

[cmb91LX]

6o ft times?

mph should be easy 12s

what octane for 12 to 1 comp, any detontation, pinging?

[MAXCANINE]

what about tires, tire pressure, torque converter??
Max

[MAD FORD]

cmb91LX : I felt real bad.. so I throw the drag chart in the trash

MAXCANINE : MT ET Radial ... 16-50-255

I dont know my tire pressure

3000 stall torque converter

[cmb91LX]

do you remember what the 60 ft was around?

You def have the MPH for a much better time with a good 60ft?

Octane was greater than 93 I assume with the high comp????

The MT drag radials should be @ 15 psi or lower, whichever works

[MAD FORD]

Octane was greater than 93 I assume with the high comp????

we use 95 in Saudi Arabia + I pot STP Octane Booster

[bender4601]

Whats the air like there? Looks like something is wrong or the D.A. was 7000'-8000' range.

[ponie1992]

That MPH should be good for 12.70's easy.

[5.0mustang5speed]

i just went 12.56 tonight..with tons left in it..first off..trash that junk holley regulator..it will cost you a motor in the long run.. what rpm are you trapping..i my self would have went with at least some 4.11 gears..is that 4150 car a mech or vs carb? and what are you shifting at?..

[MAD FORD]

Hi guys


I think I discovered a mistake

Today the first thing in the morning I did was go to my friend workshop

I take of the back seat, spare wheel and a tool box

Then I cancel the … !!!








and do a small test









It burned longer than 1/8 mile!!!


But still I want more

Will the 750cfm carburetor will be a good thing to buy ?
Or maybe a victor JR intake manifold ?




5.0mustang5speed : I am shifting @ 6000rpm ... what fuel regulator do you suggest ?

[5.0mustang5speed]

Originally Posted by MAD FORD

Hi guys


I think I discovered a mistake

Today the first thing in the morning I did was go to my friend workshop

I take of the back seat, spare wheel and a tool box

Then I cancel the … !!!








and do a small test









It burned longer than 1/8 mile!!!


But still I want more

Will the 750cfm carburetor will be a good thing to buy ?
Or maybe a victor JR intake manifold ?




5.0mustang5speed : I am shifting @ 6000rpm ... what fuel regulator do you suggest ?

i use a aeromotive, it;s all nicely machined , it was around 80.00, about 3 times of a holley..BG makes a nice one as does magna

[Nutzz]

Cam choice is odd for a carb imo..

[MAD FORD]

Cam choice should assisted on compression, displacement and intake head valve

[XSPOWER]

I would consider maybe a Weiand X-celerator single plane intake. My son ran a weiand stealth/650 and switched to the X-celerator/HVH 1" Super sucker spacer with the 650 D-pumper and picked up 2 tenths. His 85GT has the stock 8.4-1 compression/stock heads/stock 85 cam(10 degrees less duration than the 87-93 cams) and with a 5-speed and 4.10's ran 13.41 @101 on Nitto DR's. That weiand single plane works awesome. With your compression, the Vic Jr might be great also.

[5.0mustang5speed]

Originally Posted by MAD FORD

cmb91LX : I felt real bad.. so I throw the drag chart in the trash

MAXCANINE : MT ET Radial ... 16-50-255

I dont know my tire pressure

3000 stall torque converter

are you in the military ? what nationally are you? white? African American, indian, ??????????........ just asking

[5.0mustang5speed]

Originally Posted by MAD FORD

cmb91LX : I felt real bad.. so I throw the drag chart in the trash

MAXCANINE : MT ET Radial ... 16-50-255

I dont know my tire pressure

3000 stall torque converter

are you in the military ? what nationally are you? white? African American, indian, ??????????........ just asking

[EvilGooses]

He is probably from Saudi Arabia. Perhaps elevation or heat is also playing a role in keeping it down?

Mad Ford, is that a stock exhaust you just got rid of?

[robsgt]

I wouldn't get down on your times if it was the first time at the track with the car. You just need to make a couple more runs trying out different things like timing, fuel press., launch techniques, shift points, tire press, etc. Thats a decent mph to work with and if you get the et to match the mph you should be able to go mid 12s. Just get more seat time.

[r.barn]

What chassis and suspension mods are you running?

[MAD FORD]

Originally Posted by 5.0mustang5speed

are you in the military ? what nationally are you? white? African American, indian, ??????????........ just asking

I am Saudi from AL-Qateef city


EvilGooses : Its too hot in here !! its about 50 degree !!

is that a stock exhaust you just got rid of?

yes



robsgt: Thanx for the advice .. my friend get 11.7sec with Edelbrock Performer Cylinder Heads / victor JR intake / 750 speed dimond




r.barn : stock

[5.0mustang5speed]

[QUOTE=MAD FORD;7120728]I am Saudi from AL-Qateef city
mmm i see...:eek :

[Rich Gill]

If you dont know your 60ft times we have no clue to tell how well your driving, a good driver can make or break a car... If you get your 60ft time down your E/T will go down right with it.

Rich

[Nutzz]

Well 12:1 compression and a Z cam aint the best combo.A xe-274 Hr would be better IMO or even a N-71.. If you using off the shelf cams. Get rid of the high volume oil pump it is to much for your combo and is known to chew of cam gears..Also it takes away a little HP from what i hear. Victor jr intake for sure would also help out.. Do you use a pulley on the crank? Being able to rev really helps 5.0s out a bunch. My old 302 GT40P,E-cam,typhoon intake and long tubes ran 12.8@ 111.67 MPH that with a crappy 1.8xx 60ft.

[JD_87]

stop wasting money on that octane booster. Its like... 1 bottle per tank is one point... as in ... 0.1 octane. So you are running 95.1 octane.

The tailpipes were absolutely holding you back, recheck check timing, keep a record of your tire pressure and 60' times. Tire pressure is VERY important!! The difference between a high 12sec pass and a low 13sec passcan be 2psi difference in your rear tires.

Also, is this the first passes you have put into the car? How many passes total have you made? Seat time really helps! FEW people can get in a car and put down its fastest ET. My coupe went from like 13.2 down to 12.37 with relatively the same parts. Just took good record keeping, fine tuning, and like 50 passes.

[MAD FORD]

5.0mustang5speed : I speak English very will


Rich Gill : reaction time and the traction on the track was good.. I think if I try again I will do good after I canceled the stock exhaust tailpipes



Nutzz :

Do you use a pulley on the crank?

4.5” aftermarket pulley


JD_87 :

The tailpipes were absolutely holding you back

The last thing that I imagine is the huge difference after drop it !

By the way .. the nearest track to me is 200km away from home

So I can’t try in the track every day .. but still can try with LS1’s all day

[Rich Gill]

Is it funny to anyone else that there is Foxes' and Ls1's running around Saudi Arabia?

I think that the altitude may have be a reason for the times....unless your 60' was really bad.

I am from Salt Lake City, Utah, where we are way above sea level. My 2001 GT will run 12's all day long here in Florida, but in Utah I will do 13's. The higher your altitude, the thinner the oxygen, which will reduce performance.

How many feet above sea level are you?

[blackout50]

I would recomend replacing the 4150 carb and installing a 650 double pumper.4.30 gears and a 3400-3800 converter would be better suited for what you have.I also would expect the headers are 1 3/4".Your mph is way low. I would expect 110-113mph in bad air.Good air and good tune 115-117mph.

[Stitch]

Originally Posted by Nutzz

Well 12:1 compression and a Z cam aint the best combo.A xe-274 Hr would be better IMO or even a N-71.. If you using off the shelf cams. Get rid of the high volume oil pump it is to much for your combo and is known to chew of cam gears..Also it takes away a little HP from what i hear. Victor jr intake for sure would also help out.. Do you use a pulley on the crank? Being able to rev really helps 5.0s out a bunch. My old 302 GT40P,E-cam,typhoon intake and long tubes ran 12.8@ 111.67 MPH that with a crappy 1.8xx 60ft.

Sounds good Nutzz but I would not put on a Victor Jr.A duel plane intake is what he needs if he is shifti ng at 6000.

[blackout50]

Originally Posted by Stitch

Sounds good Nutzz but I would not put on a Victor Jr.A duel plane intake is what he needs if he is shifti ng at 6000.

Thats obviously part of the problem.There is no reason he shouldnt be pulling far past 6000 with that cam.I had an x-cam retarded 4 degrees and would shift at 6400-6600.

[nosmatt]

order up a UPR front and rear suspension kit, and some drag shocks/struts.


work on the chassis, and learn to optimize the combo as is, then switch to a vic jr and supporting hardware....

imho of course.

Originally Posted by nosmatt

order up a UPR front and rear suspension kit, and some drag shocks/struts.


work on the chassis, and learn to optimize the combo as is, then switch to a vic jr and supporting hardware....

imho of course.

Hey I like this guy!!!!^^^^

[nosmatt]

Originally Posted by Marc@UPR

Hey I like this guy!!!!^^^^

WELL THEN, hook me up!

literally!

91 lx hatch, virgin suspension.
needs it ALL.
front and rear kit, w/coil overs etc...

[rannalf]

Originally Posted by Marc@UPR

I think that the altitude may have be a reason for the times....unless your 60' was really bad.

I am from Salt Lake City, Utah, where we are way above sea level. My 2001 GT will run 12's all day long here in Florida, but in Utah I will do 13's. The higher your altitude, the thinner the oxygen, which will reduce performance.

How many feet above sea level are you?

Not likely altitude, but TEMP! He said it was 50* there, and I'm betting that means celsius, since it is summer in the desert. 122* heat has been known to hurt 1/4 mi. times Coupled with the fact that he hasn't started to take good notes on tire pressure, 60', etc. I'm guessing that it is a combination of the heat and not being used to racing the car.

[ricks90billblass]

I would suggest that you make a 1/4 mile pass or two, and then shut down the engine right away. let it cool down and pull out a couple of spark plugs say 1&3 and 5&6 and inspect the plugs to see if they are showing to be clean or if they have a blackish coating. the black coating is carbon from having to much fuel going through the motor during the run. It is also known as running "rich" or "fat". (If your are runnning rich it will cause you to run slower.) if they are blackened you can try reducing your fuel pressure 1/2 lb at a time and make another pass then check the same plugs again to see if they have cleaned up a bit. If you get below about 5 1/2 lbs it would be time to put smaller jets in the secondaries.
As well, blackout50's advice of a 650 DP would be a better choice for your application.