Miss T did a 10

[brad24]

Originally Posted by greencapri408

a converter can be too tight and stop the engine jumping up to peak tq
i had this yrs ago with a clevo when a convertor shop sent me the wrong convertor. I got a guys 3500 for his 302windsor and he got my 4500 for my 383 clevo.my engine was a slug wouldn't get up on the start line it was like driving with the brakes dragging
and hell yeah brads happy running a 10

hell yeah

[Windsor]

Originally Posted by brad24

hell yeah

Brad if you are happy leave everything alone and just enjoy driving it.

Cheers,
Steve.B

[Windsor]

Originally Posted by greencapri408

a converter can be too tight and stop the engine jumping up to peak tq
I had this yrs ago with a clevo when a convertor shop sent me the wrong convertor. i got a guys 3500 for his 302Windsor and he got my 4500 for my 383 clevo.my engine was a slug wouldn't get up on the start line it was like driving with the brakes dragging
And hell yeah brads happy running a 10

Gents all I can add is the XTGT I have mentioned is 363 cubic inches and runs some good numbers with a 3600 stall convertor and 3.89 gears. I have no idea why you guys have problems with your street engines and small convertors.

Cheers,
Steve.B

[russxr67]

Originally Posted by 66 coupe

Brads converter is showing a 5% slip, based on the data in this thread.
I wouldnt be worried about the converter, and if there is infact an issue with the converter there will be no problem getting it sorted out. Doubt it though.

The car is 60ft'ing very well, if anything the car is pulling back a little bit 1/2 track onwards. Might be some improvment playing with settings on the rancho's but thats not really going to affect mph - only the 60ft.


I will catch up with Brad one day and go over a few things, ie install a wideband so we can log AFR's, check fuel filter, disable or increase the rev limiter on the CDI (just incase its braking down early), another set of plugs etc etc.

Russ maybe can recheck tappet clearances if he thinks necessary and then once back on the track maybe one of us can sit in for a few passes to keep an eye on fuel pressure gauge etc as its too hard for Brad to look at while hes driving down the 1/4.

Keep in mind Brad has built the car and it has gone straight to the track, we have not messed around with any of the parameters of the car, so there will be room for improvement.
However < 1.60 60ft and 10.9x pretty much straight out of his garage is nothing to complain about, more so due to the fact that this is his street car and not a track car.
Yes everyone wants big HP numbers and to run 9's but you need to stop and look at the practical side of things at some stage.

At the end of the day Brad is still smiling as hes achieved what he set out to acheive in the beginning and that was 500 odd hp and 11 sec passes. Hes in the 10's and there may be a bit more in it, so whatever more he gains without opening the motor will make his smile bigger again


Also this is something i've had bookmarked for some time - maybe it might be of interest to some of you http://www.hardtail.com/techtips/analizingtimeslip.html

This is probably about the only intelligent post in this whole thread.

I checked the lash a few weeks ago Jamie. They were all pretty much spot on.

[greencapri408]

my 4800 iv driven it hundreds of kms its now 5k and ill be driving it everywhere when its finished
the Cortina is my fathers he used to drive it to work (320kms) round trip a day, all the time

[Windsor]

Originally Posted by greencapri408

my 4800 iv driven it hundreds of kms its now 5k and ill be driving it everywhere when its finished
the Cortina is my fathers he used to drive it to work (320kms) round trip a day, all the time

Why do you feel the need for such high stalls in street cars? If the combination is right it will not require anywhere near that, especially with the cubic inches in your XR. If it is more of a strip than a street car, totally understandable. 320kms in traffic to work every day with a 5500 stall?

Cheers,
Steve.B

[XT302]

Roughly 85000km a yr , beats the taxable average of 15000 a year lol

[greencapri408]

mate I listen to my convertor guys. I build engines they build convertors, I pay for there experience . iv never had an issue with convertors overheating the trans on the street with a good cooler
I never said 320kms in traffic, 40 kms of the trip would be in traffic
the rest is sitting on 110 on the freeway

[greencapri408]

his lives in a country town and worked in melb for 15yrs
the fuel costs were crazy but he loved it

[HEMI POWER]

Originally Posted by greencapri408

his lives in a country town and worked in melb for 15yrs
the fuel costs were crazy but he loved it

Seriously a 5k convertor for the street,what gear ratio ,4.8?????????

[greencapri408]

Originally Posted by HEMI POWER

Seriously a 5k convertor for the street,what gear ratio ,4.8?????????

4.11 and 26 inch tyres

[HEMI POWER]

Originally Posted by greencapri408

4.11 and 26 inch tyres

I would of thought with a 5K convertor it would want a lower diff ratio.

[XT302]

Originally Posted by greencapri408

his lives in a country town and worked in melb for 15yrs
the fuel costs were crazy but he loved it

Cortinas have a small fuel tank he would have nearly had to fuel twice a day lmao

[greencapri408]

Originally Posted by XT302

Cortinas have a small fuel tank he would have nearly had to fuel twice a day lmao

custom 120 litre cell

[greencapri408]

whats the interpretation of a street car?. is it your nans vn or is it the 600+ cube blown toranas in streetmachine that the guys say are street driven
I guess its all about the owners idea on it
me personally I don't care what rpm it sit at on the highway or the fuel economy
never have never will its what I like doing so ill continue doing it

[HEMI POWER]

Originally Posted by greencapri408

whats the interpretation of a street car?. is it your nans vn or is it the 600+ cube blown toranas in streetmachine that the guys say are street driven
I guess its all about the owners idea on it
me personally I don't care what rpm it sit at on the highway or the fuel economy
never have never will its what I like doing so ill continue doing it

A street car is basically a car that can be driven on the street without geting a defect every time you take it out.Defect in a way of engine and other mods.Quite simple really.

[greencapri408]

sounds like you have it all figured out
cops could defect any car if they wanted too

[HEMI POWER]

Originally Posted by greencapri408

sounds like you have it all figured out
cops could defect any car if they wanted too

Ok ill leave it at that

[prasac]

with the turbo engine now, got 8000rpm Neal Chance torque converter in the Capri at the moment with 3.5 diff gears, you would never have guessed it, drives like a normal car.

the old old 302W motor back in 1988 had a 3500rpm Dominator i think it was, ran 11.5's, 60' in the 1.6's, daily driven. Norm @ Northmead Auto Centre built the C4 (been building box for all our cars for 20 years now), trans oil was being changed only once or twice a year, was taken out fortnightly to street meets.

302W (around 1998-1999), had a 5500-6000rpm TCE converter, it was daily car for 2 years, was doing 300km+ a week and racing at least every 2-3 weeks. ran mid 10's, didn't miss a beat on the road or strip. required very very minimal maintenance.

greencapri408 is correct, sit down have a chat with the gearbox builder and the torque converter guy and work out exactly what you want and were trying to achieve. feed them as much data as u can, and u should come out with the best combo possible. the best thing you can do is surround yourself with people that know their stuff, if you aren't sure of something don't be afraid to ask questions.

if he is 60'in 1.56 the converter is doing its job. thats a damn good 60' especially considering its had so few passes.

[XT302]

Originally Posted by prasac

with the turbo engine now, got 8000rpm Neal Chance torque converter in the Capri at the moment with 3.5 diff gears, you would never have guessed it, drives like a normal car.

the old old 302W motor back in 1988 had a 3500rpm Dominator i think it was, ran 11.5's, 60' in the 1.6's, daily driven. Norm @ Northmead Auto Centre built the C4 (been building box for all our cars for 20 years now), trans oil was being changed only once or twice a year, was taken out fortnightly to street meets.

302W (around 1998-1999), had a 5500-6000rpm TCE converter, it was daily car for 2 years, was doing 300km+ a week and racing at least every 2-3 weeks. ran mid 10's, didn't miss a beat on the road or strip. required very very minimal maintenance.

greencapri408 is correct, sit down have a chat with the gearbox builder and the torque converter guy and work out exactly what you want and were trying to achieve. feed them as much data as u can, and u should come out with the best combo possible. the best thing you can do is surround yourself with people that know their stuff, if you aren't sure of something don't be afraid to ask questions.

if he is 60'in 1.56 the converter is doing its job. thats a damn good 60' especially considering its had so few passes.

Prasac,

Copy of the dyno sheet here

http://www.fordforums.com.au/showthr...330073&page=11

Unfortunately dyno min starts at 4500 (300rpm below his current stall) but at 4500, it makes 507.4 with a Max of 515.6 at 5450, having a guess it would still make 500ftlbs at 4200, what do you reckon and extra 15-17FTLBS would give to the 60'?

[Work Horse]

Originally Posted by brad24

On her second trip to the wednesday night street meet my XT started running high 10's
Can you fella's have a look at these two quickest time slips & tell me what you think.
The night was pretty warm & humid, with thunderstorms all round the track for most of the night.
Will the car run quicker in less humid weather?
We ran 8 passes, the first 2@ 11.0's, with another 5 passes 10.9's
image
image

Yes Brad, touch nothing else and the car will be quicker and faster in better air.

As has been mentioned, it's a little strange to spend pages discussing the "problem" with a street car that runs in the 10's on its second outing!

Short answer is you have no problem.

You mentioned the weather. There is a reason why so much weather information is given on time slips, and why data loggers contain weather stations. The weather directly affects the power output of your engine.

There is often intense discussion on forums about Dyno Vs time slip.

Dyno's measure horsepower (work done over time).

Time slips measure performance (work done over time).

So if they are measuring the same thing, work done over time, they should come up with the same result.

They often do, but dynos make "corrections" to the raw data to allow for the weather. Time slips show the power required to run a particular number on a particular day, they do not correct for the weather. That is why people (including me) refer to time slips as "real horse power" as in an actual measure of work done over time.

So if we take 602 horsepower your car made on the Dyno. Allow for any changes made when it was raced at the track in your car; different air cleaner, water pump, alternator, mufflers etc.

Then we need to reverse engineer the correctional factor for the weather. Plug in the weather conditions from your time slip on a calculator like this http://wahiduddin.net/calc/calc_hp.htm

It tells me in those weather conditions you will make about 95% of the power the Dyno showed.

So that’s less about 30hp before we add in any short comings in the converter, fuel system, suspension, your driving etc

Short answer is you have no problem.

[nugget378]

Riddle me this fella's,

The moroso calculates average power over a run by terminal speed using weight to come up with a power figure right?

So for interests sake lets say a car makes 600hp at 7000rpm, but at 6500 is only making 500hp.

This car crosses the finish line at 6500 because of gearing, and top gear is usually around half the track distance give or take.

How will the car EVER show the moroso calculated HP, since its NOT using its whole hp over the entire 400m?

It CANT, because it throws out the rigid maths calculation used......

Anyone who says it can, is either sandbagging, or doesn't understand how the moroso works..

[Windsor]

Originally Posted by nugget378

Riddle me this fella's,

The moroso calculates average power over a run by terminal speed using weight to come up with a power figure right?

So for interests sake lets say a car makes 600hp at 7000rpm, but at 6500 is only making 500hp.

This car crosses the finish line at 6500 because of gearing, and top gear is usually around half the track distance give or take.

How will the car EVER show the moroso calculated HP, since its NOT using its whole hp over the entire 400m?

It CANT, because it throws out the rigid maths calculation used......


Anyone who says it can, is either sandbagging, or doesn't understand how the moroso works..

Nugget what 393 cubic inch street engine makes 600hp at 7000 but only 500 at 6500? Brad's beast makes 592hp at 6500. Brad's XT, The Rhino XYGT and the XTGT being discussed all run the same rear gearing and same diameter rear tyre so that is another variable out of the equation. Brad's XT has a problem which is not suspension or convertor related, hopefully himself and his team can get on top of it and run the numbers they are after.

Cheers,
Steve.B

[nugget378]

Originally Posted by Windsor

Nugget what 393 cubic inch street engine makes 600hp at 7000 but only 500 at 6500?
Cheers,
Steve.B

Windsor, if you read my post correctly you will see the words "for interests sake" what Brads made at 6500 is not the point.

Do you have the maths calculation to show what a cars output is when it crosses the line at under its max hp rpm by so much and can work it out?

Thats the point.

[HEMI POWER]

Originally Posted by nugget378

Windsor, if you read my post correctly you will see the words "for interests sake" what Brads made at 6500 is not the point.

Do you have the maths calculation to show what a cars output is when it crosses the line at under its max hp rpm by so much and can work it out?

Thats the point.

I rekon get the owner of the XT on here for some advice hey,i don't think your making much sense your confusing the shiit out of every-one.

[Windsor]

Originally Posted by nugget378

Windsor, if you read my post correctly you will see the words "for interests sake" what Brads made at 6500 is not the point.

Do you have the maths calculation to show what a cars output is when it crosses the line at under its max hp rpm by so much and can work it out?

Thats the point.

Nugget leave the calculations to the likes of John Force, we are talking about humble street cars here.

Cheers,
Steve.B

[nugget378]

Originally Posted by Windsor

Nugget leave the calculations to the likes of John Force, we are talking about humble street cars here.

Cheers,
Steve.B

Exactly..

And if you showed me a humble street car that matched the moroso, I would say the whole story isn't being told...

[Work Horse]

Originally Posted by Windsor

Nugget leave the calculations to the likes of John Force, we are talking about humble street cars here.

Cheers,
Steve.B

John Force! Wow you’re as old as I am

I've watched him race and shaken his hand.

Do you reckon he still talks about me....

[XR.1967]

Ok my 2c lol..
There is allways a few things people can do to improve there times but yer 10's second go out, Well done..
Try some front runners if you haven't allready.. (less drag)
I have a Gtech because a drag strip is 4 1/2 hrs away lol..
They work out your 1/4 mile times by Gforce..
The same with HP..
One thing I did read was, the HP on the Gtech will show less then the dyno, because one is dyno HP and the other is road HP..
The diffrence is air quality but the big thing was drag of the car (some cars have better drag then others) That can be areo, tyres, head wind or many other things..
Good luck with it ..
You should be happy no matter what..

[brad24]

How much power would a alternator use?