Whats the perfect reciepe for the top speed record?
19-12-2009, 03:20 PM
#44
Happily retired
Christian at what revs was peak Power on your old engine . Do they sustain Power or does it drop off quickly, Power at 7.5k would help also. Thanks, i will then get my calculator out.
19-12-2009, 03:46 PM
#45
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Thanks Rod. 
Additionally, from what I recall, on my last outing, 165mph came up inside a mile and at (I think) around the mid 30 second window. I think Oli's splits were slightly better than this, naturally. He launches better than me and his car has more power.
Simon's data kinda proves what I said about ratios too.
Additionally, from what I recall, on my last outing, 165mph came up inside a mile and at (I think) around the mid 30 second window. I think Oli's splits were slightly better than this, naturally. He launches better than me and his car has more power.
Simon's data kinda proves what I said about ratios too.
19-12-2009, 04:10 PM
#47
Thats kinda how it looked to me too??
19-12-2009, 04:19 PM
#50
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19-12-2009, 05:07 PM
#53
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Surely you regret not taking the record back, Christian? Would have been hard for the other lads to beat you again. Pushing the boundaries and all that.
Benni.
Benni.
19-12-2009, 05:47 PM
#57
Happily retired
My last dyno run at 320bhp (1.6 bar) showed a very flat torque curve making useful power to 7400rpm, hence my reasoning for feeling that it would have made between 7200-7400rpm in 5th at Brunters. Certainly 7200rpm. IIRC, without digging my data out, even 7200rpm was high 170's. The 171.3mph build had good torque to 6800-7000rpm and pulled to 7000rpm fairly strongly. See my reasoning?
. Torque will acclerate you but wont beat the aero dynamic wall thats down to Power. If you gear more than a couple of Hundred rpm past
19-12-2009, 06:45 PM
#60
PassionFord Post Troll
morph - i wish you the best of luck, if you think its going to be that easy id love to see you do it 
personally id take your car as it is now to brunters and see what itll do, then you can see for yourself the amount of effort required to do those speeds.
for what its worth ive read the 6 speed box is geared for 181.
what kind of effect will areodynamics play, i know its a very vague question but...how much faster would a flat sideed wheel and slanted front car go than a normal car?
as i always thought top speed is goverend by gear ratios and power to top out those ratios, and areodynamics just helped you get there faster not actually improve on the top speed!?
personally id take your car as it is now to brunters and see what itll do, then you can see for yourself the amount of effort required to do those speeds.
for what its worth ive read the 6 speed box is geared for 181.
what kind of effect will areodynamics play, i know its a very vague question but...how much faster would a flat sideed wheel and slanted front car go than a normal car?
as i always thought top speed is goverend by gear ratios and power to top out those ratios, and areodynamics just helped you get there faster not actually improve on the top speed!?
Last edited by jammerrs; 19-12-2009 at 06:47 PM.
19-12-2009, 06:59 PM
#61
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I dont know why people think this is some easy challenge, i certainly dont think it!
if the 6speed is good for 180mph then thats a start in the right direction.
Peeps need to understand that i am not expecting to go to brunters and set a record.
these things will have to be developed, tested then redesigned then tested then redisgned.
but as this is my weekend toy and i have no limits on what i want in terms of power, speed, etc. then i dont mind if it takes a few years to be getting to these sorts of speeds!
Last edited by morph; 19-12-2009 at 07:05 PM.
19-12-2009, 07:04 PM
#62
six speeder due to our calculations from the info we had was way to short as christain said but if you have better info go for it,its taking us a while to sort our gearing on the new set ups as ollie and me both want as close to the rst box ratio as we can as it makes a good al round car track pod topspeed etc.
doing 150 plus isnt that easy,160 was harder infact how many are in the 160 club ?
simon,christian ,ollie, me,tony t jamie g ,paul j, sunny etc any more ahhh ian h,---------- it really isnt easy tbh imo.
doing 150 plus isnt that easy,160 was harder infact how many are in the 160 club ?
simon,christian ,ollie, me,tony t jamie g ,paul j, sunny etc any more ahhh ian h,---------- it really isnt easy tbh imo.
19-12-2009, 07:14 PM
#64
You WILL eat your words on the gear ratios. It CANNOT be made to do something it physically CANNOT do no matter how good the tuner. Now, as far as I know and its the opinion of most people on here that know anything about the Getrag 'box, there is only ONE gearset for that 'box. I'll post the spreadsheet on here, I can't do all 6 gears on one chart because it runs on 2 layshafts with different ratios apparently.
BRB.
Last edited by Christian and Beccy; 19-12-2009 at 07:16 PM.
19-12-2009, 07:23 PM
#66
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Morph, it's hardly a wonder you fall out with people on here. It's MATHEMATICALLY impossible. Gears are FIXED items, you cannot alter the speed/rpm factor of a gearset. All you can do is improve the engines ability to rev harder. Thats where it gets hard. Zetecs notoriously don't rev without spending money, then you'll need to get good power delivery so that you can actually hit 7500-8000rpm in top gear. Believe me, you'll need some serious fucking power to accelerate strongly enough to allow you to reach 8000rpm in the distance. A CVH struggles because of its valve-train. It'd be hard to get it past 7500rpm with the boost required to do the power IMO. Valves would be bouncing all over the place.
You WILL eat your words on the gear ratios. It CANNOT be made to do something it physically CANNOT do no matter how good the tuner. Now, as far as I know and its the opinion of most people on here that know anything about the Getrag 'box, there is only ONE gearset for that 'box. I'll post the spreadsheet on here, I can't do all 6 gears on one chart because it runs on 2 layshafts with different ratios apparently.
BRB.
You WILL eat your words on the gear ratios. It CANNOT be made to do something it physically CANNOT do no matter how good the tuner. Now, as far as I know and its the opinion of most people on here that know anything about the Getrag 'box, there is only ONE gearset for that 'box. I'll post the spreadsheet on here, I can't do all 6 gears on one chart because it runs on 2 layshafts with different ratios apparently.
BRB.
tuner says 180mph!
so who do i believe?
you somehow dont see this information and start throwing wild statements like i start pissing people off!
calm yourself down and ask the man who is advising me!
19-12-2009, 07:27 PM
#70
You MUST be kidding me, right? You think you're going to march up and take the FWD Ford top speed record and you don't even know how to interpret a SIMPLE gear ratio table?
The top table shows 205/40/17 tyres, 7500rpm rev limit, ST170 gear ratios. The top speed at 7500rpm is the bottom right figure. 167mph.
The bottom table is the same, but with 8000rpm rev limit. 178mph.
My MTX was 189mph at 7400rpm, based on the same chart. If your tuner says anything different to that chart, then he is wrong IMO. Unless he is talking about some wild theoretical speed based on using crazy big wheels/tyres in which case, MARK MY WORDS, you'll never do it at Brunters.
The top table shows 205/40/17 tyres, 7500rpm rev limit, ST170 gear ratios. The top speed at 7500rpm is the bottom right figure. 167mph.
The bottom table is the same, but with 8000rpm rev limit. 178mph.
My MTX was 189mph at 7400rpm, based on the same chart. If your tuner says anything different to that chart, then he is wrong IMO. Unless he is talking about some wild theoretical speed based on using crazy big wheels/tyres in which case, MARK MY WORDS, you'll never do it at Brunters.
19-12-2009, 07:27 PM
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I thought i already did:
but if not SIMON or SAS.
Quote:
Originally Posted by Christian and Beccy View Post
What tuner?
Guess which one! the one that says he can hit 184mph at 7400rpm!
So now are your calculations right or wrong?
Today 06:47 PM
Originally Posted by Christian and Beccy View Post
What tuner?
Guess which one! the one that says he can hit 184mph at 7400rpm!
So now are your calculations right or wrong?
Today 06:47 PM
19-12-2009, 07:30 PM
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The top table shows 205/40/17 tyres, 7500rpm rev limit, ST170 gear ratios. The top speed at 7500rpm is the bottom right figure. 167mph.
The bottom table is the same, but with 8000rpm rev limit. 178mph.
My MTX was 189mph at 7400rpm, based on the same chart. If your tuner says anything different to that chart, then he is wrong IMO. Unless he is talking about some wild theoretical speed based on using crazy big wheels/tyres in which case, MARK MY WORDS, you'll never do it at Brunters.
The bottom table is the same, but with 8000rpm rev limit. 178mph.
My MTX was 189mph at 7400rpm, based on the same chart. If your tuner says anything different to that chart, then he is wrong IMO. Unless he is talking about some wild theoretical speed based on using crazy big wheels/tyres in which case, MARK MY WORDS, you'll never do it at Brunters.
You MUST be kidding me, right? You think you're going to march up and take the FWD Ford top speed record and you don't even know how to interpret a SIMPLE gear ratio table?
19-12-2009, 07:33 PM
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I think you need to step out of this mate as i think you are taking ths way too personal, maybe missing the car or something but deffo not helping me out with any decent information!