4.0 Chimaera with 183 bhp @ wheels
Discussion
This is what i recorded over the weekend on my Race Technology performance meter. It's claimed accuracy is within 3%.
I've got a power graph which i'll post this evening. It showed 183bph @ 5900rpm.
Also got some in gear times in 3rd:
20-40 3.20
30-50 3.10
40-60 3.04
50-70 3.10
60-80 3.24
70-90 3.60
(these are from memory - i'll post the recorded ones tonight if they're different).
An Autocar test only managed times of around 3.5 secs.
Whatever the figures - it's still mighty quick!
I've got a power graph which i'll post this evening. It showed 183bph @ 5900rpm.
Also got some in gear times in 3rd:
20-40 3.20
30-50 3.10
40-60 3.04
50-70 3.10
60-80 3.24
70-90 3.60
(these are from memory - i'll post the recorded ones tonight if they're different).
An Autocar test only managed times of around 3.5 secs.
Whatever the figures - it's still mighty quick!
183bhp at the wheels seems very healthy for a 4.0... assuming a 17% transmission loss that would mean the engine is putting out 220 bhp.
Whats the torque like though..? Assuming 220 bhp at 5900, thats a torque figure of 195 lbft...
Not sure about the in gear speeds though... if 40-60 takes over 3 seconds, how does the car manage a 0-60 in 5 seconds.. 0-40 in 2..?
Promising numbers though
Cheers
Matt
>> Edited by M@H on Tuesday 2nd December 09:01
Whats the torque like though..? Assuming 220 bhp at 5900, thats a torque figure of 195 lbft...
Not sure about the in gear speeds though... if 40-60 takes over 3 seconds, how does the car manage a 0-60 in 5 seconds.. 0-40 in 2..?
Promising numbers though
Cheers
Matt
>> Edited by M@H on Tuesday 2nd December 09:01
Haven't tried 0-60 yet - only had the car about a month now and there hasn't been too many dry days to test it properly! Dont know if i'd be able to get the perfect start either.
Also, my gadget doesn't record the torque figure - though i believe Race Technology's latest device does.
Would be interesting to see the a rolling road would record. I'll try the test again in 2nd gear sometime this week, and maybe even a 0-60 !
>> Edited by jsr on Tuesday 2nd December 13:21
Also, my gadget doesn't record the torque figure - though i believe Race Technology's latest device does.
Would be interesting to see the a rolling road would record. I'll try the test again in 2nd gear sometime this week, and maybe even a 0-60 !
>> Edited by jsr on Tuesday 2nd December 13:21
I take it thats with a AP22 or some such, been considering getting one for a while . Whilst it may not be the most accurate thing in the world, once set up I assume you can do back to back testing on tweeks/style of drivng/change up points etc without having to resort to a rolling road every time, which is exactly what attracts me to one 
.
What sort of data do you have to input to tailor the unit to your car to get it 'customised & set up'.
I only ask that as most 'standard' 4ltr chims seem to have 160-170 at the wheels on RR's, not that 180 is unknown IMHO.
Harry
. What sort of data do you have to input to tailor the unit to your car to get it 'customised & set up'.
I only ask that as most 'standard' 4ltr chims seem to have 160-170 at the wheels on RR's, not that 180 is unknown IMHO.
Harry
HarryW said:
I take it thats with a AP22 or some such, been considering getting one for a while .
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=2446518528&category=32094&rd=1
shpub said:
I take it thats with a AP22 or some such, been considering getting one for a while .
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=2446518528&category=32094&rd=1
Steve how does that compare with the AP22 :Confused:, saw the MK address and thought of PeterH then saw shpub selling then understood why you knew it was for sale
. Why selling 
. What was the original rtp so I know were to step in/out 
. Harry
HarryW said:
The thought occurs that you have to put in the exact weight of the vehicle to get the horspower figures.. (?) accordingly how accurate was the weight specified to get 183 bhp....?
Cheers
Matt.
Sort of what I was asking, but in a more indirect way
HArry
..just say what you think, man !
I do have the AP22.
Straight from the box it's accurate to within 3%, which reduces to less than 1% once setup correctly. Also, for accurate bhp, acceleration must be greater than 0.2g, which it is in 3rd gear on my 4.0, but not by much!
I'll try it in 2nd soon!
To set it up, you put in the vehicle weight - i used 1150kg to include my weight and some fuel (i'm fairly light!).
A coefficient of drag and rolling resistance need to be added too. These are calculated from the results of two tests. You have to time how long the car takes to decelerate from 60 to 55 mph and 15 to 10 mph in neutral and then do two calculations.
I'm pretty sure the the speeds/times/distances etc it records are very accurate, and power is probably fairly accurate too.
Had a Fiesta Zetec-S before my Chim which i recorded 87 bhp @ wheels which is spot on.
My only concern with the 183bhp is that most with 4.0 engines the power drops after 5500rpm. Mine was still climbing right up to 5900rpm, though only just - still got to post the graph.
It's a cool gadget to play with and even if it isn't accurate, it will show differences in modifications - as i also found out with my Fiesta.
>> Edited by jsr on Wednesday 3rd December 13:28
Straight from the box it's accurate to within 3%, which reduces to less than 1% once setup correctly. Also, for accurate bhp, acceleration must be greater than 0.2g, which it is in 3rd gear on my 4.0, but not by much!
I'll try it in 2nd soon!
To set it up, you put in the vehicle weight - i used 1150kg to include my weight and some fuel (i'm fairly light!).
A coefficient of drag and rolling resistance need to be added too. These are calculated from the results of two tests. You have to time how long the car takes to decelerate from 60 to 55 mph and 15 to 10 mph in neutral and then do two calculations.
I'm pretty sure the the speeds/times/distances etc it records are very accurate, and power is probably fairly accurate too.
Had a Fiesta Zetec-S before my Chim which i recorded 87 bhp @ wheels which is spot on.
My only concern with the 183bhp is that most with 4.0 engines the power drops after 5500rpm. Mine was still climbing right up to 5900rpm, though only just - still got to post the graph.
It's a cool gadget to play with and even if it isn't accurate, it will show differences in modifications - as i also found out with my Fiesta.
>> Edited by jsr on Wednesday 3rd December 13:28
jsr said:
I do have the AP22.
Straight from the box it's accurate to within 3%, which reduces to less than 1% once setup correctly. Also, for accurate bhp, acceleration must be greater than 0.2g, which it is in 3rd gear on my 4.0, but not by much!
I'll try it in 2nd soon!
To set it up, you put in the vehicle weight - i used 1150kg to include my weight and some fuel (i'm fairly light!).
A coefficient of drag and rolling resistance need to be added too. These are calculated from the results of two tests. You have to time how long the car takes to decelerate from 60 to 55 mph and 15 to 10 mph in neutral and then do two calculations.
I'm pretty sure the the speeds/times/distances etc it records are very accurate, and power is probably fairly accurate too.
Had a Fiesta Zetec-S before my Chim which i recorded 87 bhp @ wheels which is spot on.
My only concern with the 183bhp is that most with 4.0 engines the power drops after 5500rpm. Mine was still climbing right up to 5900rpm, though only just - still got to post the graph.
It's a cool gadget to play with and even if it isn't accurate, it will show differences in modifications - as i also found out with my Fiesta.
>> Edited by jsr on Wednesday 3rd December 13:28
Thats interesting stuff.....
dear father christmas....... Re the power still climbing up to 5900, are you sure that it is standard
as that is an indication IMHO that the engine has been breathed on in some way. Harry
i got my G Tech Pro off this guy works out about £36 including postage if you escape the import Duty
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=46100&item=2446581663
unfortunately i got coped by customs so had to pay an extra 11 squid
works out about £36 including postage if you escape the import Duty http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=46100&item=2446581663
unfortunately i got coped by customs so had to pay an extra 11 squid
HarryW said:
Re the power still climbing up to 5900, are you sure that it is standard as that is an indication IMHO that the engine has been breathed on in some way.
As far as i know it's standard. When i bought it a month ago the advert said it was a 4.0HC, but i can't find any evidence to prove this.
It's dry tonight, so i'm gonna do a run in 2nd gear (accelerate from 15mph to 60ish) and see what this produces.
Sorry, have I missed something here 
183 bhp from four litres (at the wheels)on a sports car, does not seem very much to me,for instance, the Jaguar XJ6 SALOON straight six XK engine was producing 245 bhp from 4.2 litres (not at the wheels) as long ago as 1969 with twin SU's.
>> Edited by Wacky Racer on Wednesday 3rd December 18:58
183 bhp from four litres (at the wheels)on a sports car, does not seem very much to me,for instance, the Jaguar XJ6 SALOON straight six XK engine was producing 245 bhp from 4.2 litres (not at the wheels) as long ago as 1969 with twin SU's.
>> Edited by Wacky Racer on Wednesday 3rd December 18:58
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