18 replies to this topic

[laz333]

Hi all,

 

A bit late I know, but I have a small KP35 turbo, from a fiesta 1.4tdci. As i no longer have my ford, but still have a turbo for it ( I striped and rebuilt the turbo, new seals etc.) and I also have a 73 mini, half way through restoration. I was thinking to put the turbo on to my mini, the mini will be a 1380 as it is going to get re bored. I was wandering what anyone was thinking about this idea?

 

The turbo is really quite small, but looking on-line at the spec, it says the turbo is for car 1.0l- 1.8l and is good for 200BHP, (that is not what it make I'm sure just how much it can handle... I think?) and the boost pressure is 7psi to 21psi and has a minimum power gains of 50- 100BHP here is a link of the spec, and all other spec on-line say the same thing:

 

http://www.ebay.com/itm/KP35-TURBOCHARGER-BOOST-TURBO-INTERNAL-WASTEGATE-1-4L-DV4TD-8HX-CITROEN-PEUGEOT-/190830863591 

 

So yeah just wandering what the forum thought about this idea and this turbo?

 

Laz.

 

 

 

[coopdog]

The correct way to know if the turbo will be ok to use takes a lot more then just looking at the specs of it, you need to know the cfm and uses a couple of equations to plot out the engine on the compressor map.

What's the ar?

[laz333]

OK, well in that case then, I will find out what the cfm of the turbo is. do you know what these equations are? i am quite good at math and have recently finished a math module at uni, so may be able to figure these out? 

and ar... what is that? if you let me know what that means i can look into that also.

[laz333]

Right I found out the A/R for both the turbine and compressor.

Turbine: 35

Compressor: 43

does this help any more?

found a calculator for cfm online, but am unsure of the rpm, what is the average of a 1380( carb or webber unsure which I will use yet) and also unsure of volumetric efficiency.

so still can not be sure to the cfm. 

[MRA]

AR = Air Ratio .... 

 

http://www.turbobyga..._housing_sizing

 

What cam are you using ?

 

Also what size is your exhaust system the bigger the better as far as turbo's are concerned as the back pressure is maintained by the rotary silencer (your turbo)

Edited by MRA, 16 March 2016 - 07:16 AM.

[mini13]

use this to get flow figures then find a map online for the kp35 nd plot it on

 

http://www.motorgeek...e&page=flowcalc

 

assume about 85%ve

[laz333]

@MRA i found that website also an found the AR are 35 for turbine and 43 for the compressor, there is a standard cam in at the minute as far as I am aware but I think I will put in a race cam to get the most out the engine and will not have to change it further along the line. may try to convert the original metro manifold, and modify it to use the KP35, or do you have any suggestions? I do have a standard manifold and have thought about modifying it to take a turbo but the metal seem quite thin and don't think it would be a good idea as posed to the metro turbo one?

 

@mini13 thank you for this web site and the the ve value as never knew this before, i will use it to work it out and find a map on-line thank you

[mini13]

do not stick a rac cam in, turbo's dont like it, basically overlap kills a turbo engine, ( unless its somthing like an F1 car)

 

somthing like the avonbar phase 2 is as far as you want to go, thats 264 degrees on the inlet and 292 on the exhaust

[laz333]

Oh right, so maybe a fast road cam then? where would suggest i get one? as mini sport and mini spare both have cams but only show one number of rotation and the best i can find is number of 256? will something like this do?

i have used the website suggested, but it does not have the turbo map for the turbo i want to use, and does not show a number of the calculation sum, to try to put it on my turbo map, and how exactly do i map a value on th turbo map? the most it show me on the website given show a red dot along some point of the graph? 

 

if in the end the turbo can not work with the car, is there any smaller turbo i could use rather than a T3? as I do not want to kill myself aha.

[laz333]

here are to maps i have found of the turbo if this is any help.

In size the turbo is really small. but come of a 1.4 tdi, and think it would be quite fun lots of bottom end boost.

but not sure how to map it out, once i have the calculated values from the web site shown above.

 

 

 

 

https://www.google.c...458428908639907

 

 

 

 

Attached Files

•  KKK.jpg   82.25K   13 downloads
•  43c05889a11d49de8a6a2da8bf03c21f.jpg   112.48K   3 downloads

[mini13]

Riiight.....

 

Ive just done a quick plot for you assuming a 1293 engine and 1 bar boost ( approx 15psi) the Yellow  dots are at 2.5k 4k and 6k rpm, (Ive assumed that the turbo will be small enough to get to a bar at 2.5k)

 

compressor wise, its a pretty small probably more suited to a 998, as its running right off the map to the right, ideally it would track up the left side of the graph and through the max efficiency "island" and stop in or near it as per the red graph.

 

with a turbo if you run outside of the plotted graph you are likly to run into issues like compressor stall or choke, which can destroy turbo's.

 

 KKK.jpg   95.75K   30 downloads

Edited by mini13, 19 March 2016 - 10:26 AM.

[laz333]

ok so judge by your calculations, realistic I would need a bigger turbo?

as I am boring the engine to 1380

thank you for your help it is greatly appreciated and much needed.

With in mind... what turbo would you suggest? you seem very clued up on the matter! and quite brilliant at math!

I don't want the immense power of the T3 straight away as I don't want to kill myself, but something suitable to run with my 1380 engine?

[coopdog]

ok so judge by your calculations, realistic I would need a bigger turbo?
as I am boring the engine to 1380
thank you for your help it is greatly appreciated and much needed.
With in mind... what turbo would you suggest? you seem very clued up on the matter! and quite brilliant at math!
I don't want the immense power of the T3 straight away as I don't want to kill myself, but something suitable to run with my 1380 engine?

Get yourself over to turbominis, mini engines have been turboed for years and the turbos information is readily available, use google

[mini13]

saab 95 GT17 is a great turbo on the A series, will boost from low down so nice and driveable and good for over 200 hp. thnnk the wasgate on them is set to about 7 psi std, so your looking at around just over 100hp.

[matty...]

I'd definitely go for the Gt17, the turbo kicks in about 2-2.5k and is good for plenty of boost if you wish to turn it up in the future.