19 replies to this topic

[Liam Mini 35]

Hey guys, i was wondering if you could supply me with a bit of help. At the end of feb my mini is coming off the road for a rebuild and im trying to get a spec list for the engine. it is going to be quite a long project and dont want to skimp on parts. i want to stick with the a series engine but want somthig very quick, so i can suprise tthe posh t***s around me that show off in there ferrari's etc. i was wanting to do a 1330 so that it can be resleeved later on if it needs doing. am just undecided on a N/A engine or going the turbo route. So if you could supply me with your suggestions and possible engine specs it would be appreciated.

I was thinking

block bored to 1330
sw10 cam
Med stage 2 light weight rotating assembly
Med lightweight flywheel
twin hif44/38
Med s/c roller drops
Med s/c box

or

replacing the sw10 with an sw5 and a mirage turbo manifold kit with t2/t3

[MiniLandy]

Cylinder head! Get the cylinder head ported and gas flowed, and get the compression ratio down. If you want to take on some seriously quick cars (i'm happy to just embarass chavs...) then you're gonna need forced induction, intercooler, the lot. You'll also want mappable ignition, so MegaJolt or similar.

A SCCR gearbox would also help off the line, with the taller first gear. Aaaand a stronger diff, cross pin would be ideal.

The other option apart from turbo to get that much power, is an 8 port, 16 valve, crossflow head. Look on the Specialist Compnents website. Nitrous, maybe?

Good luck, Paul.

[Sam Walters]

Hey guys, i was wondering if you could supply me with a bit of help. At the end of feb my mini is coming off the road for a rebuild and im trying to get a spec list for the engine. it is going to be quite a long project and dont want to skimp on parts. i want to stick with the a series engine but want somthig very quick, so i can suprise tthe posh t***s around me that show off in there ferrari's etc. i was wanting to do a 1330 so that it can be resleeved later on if it needs doing. am just undecided on a N/A engine or going the turbo route. So if you could supply me with your suggestions and possible engine specs it would be appreciated.

I was thinking

block bored to 1330
sw10 cam
Med stage 2 light weight rotating assembly
Med lightweight flywheel
twin hif44/38
Med s/c roller drops
Med s/c box

or

replacing the sw10 with an sw5 and a mirage turbo manifold kit with t2/t3

replace the sw10 with a kent cams 266 or mg metro cam and fit a gt17

[hazpalmer14]

if you want to go turbo read this here and join this forum here

[Liam Mini 35]

i alreday have a cylinder head. 12g940 fully ported and polished with 35.7 inlet and 29 ex.

i was going to go with megjolt.

do you think that an sw5 would work with a turbo unit? i dnt have any experience with turbo units so dont know how hard it would be to do.

could any body supply me with an engine spec? either what you currently have or what you would do/could do.

Thanks again

[mini_mad69]

i alreday have a cylinder head. 12g940 fully ported and polished with 35.7 inlet and 29 ex.

i was going to go with megjolt.

do you think that an sw5 would work with a turbo unit? i dnt have any experience with turbo units so dont know how hard it would be to do.

could any body supply me with an engine spec? either what you currently have or what you would do/could do.

Thanks again

Im currently building my 1380 turbo motor.



Powermax 9cc pistons
73.5cc bore -1380cc
28cc chamber 12g940 head, stainless valves
Metro turbo t3
metro turbo carb
modified plenum
Kent 266 cam
duplex timing set
metro turbo crank
RS turbo intercooler
custom exhaust
9.1:1 compression ratio
centre main strap
metro turbo crank

going to run 10 psi


Oh and megajolt

Edited by mini_mad69, 11 January 2011 - 09:12 PM.

[Liam Mini 35]

Thanks for that. How hard is it then to do the turbo conversion? I could build the engine up with the appropriate spec and compression ratio but not too sure on how the turbo would be connected. Is there much fabrication involved? And what is a plenum?

[CanadianMiniFan]

I cannot say that I have ever turbo'd a mini, however from what I have read, it is quite a complex process, usually necessitating a bulkhead box, lots of fabrication for the piping, as well as mistakes being very expensive. I have heard that supercharging is a much easier route to go, i believe there are several companies that offer kits. Alot less piping, as you don't have an intercooler, and less heat/space issues. best of luck!

[WRLondon]

yeah, depends really
a t2 would defo give people round your area a run for there money
as they spool up and come "on boost" quicker as they're abit smaller

i'd go for turboi'ing mate

less of the german parts
im gradually doing mine

[WRLondon]

a plenum is a part that bolts on the carb
usually the connector goes straight down to the turbo
so no intercooler
with that set-up and 7-10 psi you can get well over 100
my advice is to check out
turbo-mini.co.uk
&
turbominis.co.uk
a mine of useful info!

[Liam Mini 35]

ye i have been on both those sites to have a look at the compression ration etc that i would need. I have considered a supercharger b4 but not sure if it would give the power id need. As the car would need to run in the 13sec 1/4 miles. I do know that with the mirage turbo manifold kit you dnt need to chop the bulkhead. What cam would you use with a supercharger, and what compression ratio? I was thinking about 8.2-8.5:1 for the turbo to run quite high boost and an intercooler.

[R.S.P]

If you wish to run 13s quater miles i think you need to think about losing weight in the car aswell as engine

[Liam Mini 35]

If you wish to run 13s quater miles i think you need to think about losing weight in the car aswell as engine

ye iv already got the weight saving ideas down, its just what to do with the engine.
weight saving wise

* strip interior and replace with 6 point cage and some OMP grp bucket seats.
* GRP doors
* perspex windows
* GRP fully removable front
* GRP valance
* aluminium 4 pots

also

* vented a panels to get rid of some of the air build up at the front

was also thinking maybe force racing titanuim front subby and rear beam but think thats going a bit too excessive

[mini_mad69]

If you wish to run 13s quater miles i think you need to think about losing weight in the car aswell as engine

ye iv already got the weight saving ideas down, its just what to do with the engine.
weight saving wise

* strip interior and replace with 6 point cage and some OMP grp bucket seats.
* GRP doors
* perspex windows
* GRP fully removable front
* GRP valance
* aluminium 4 pots

also

* vented a panels to get rid of some of the air build up at the front

was also thinking maybe force racing titanuim front subby and rear beam but think thats going a bit too excessive

You'd be alot better off with polycarbonate windows instead of perspex, a stripped interior is a good start, but a roll cage re-introduces alot if not more weight back into the stripped interior.
Do you need one for a drag racer?

If your looking at reducing drag, cut holes, or get rid of the rear valance, de-seaming the vertical seams of the car reduces alot of the frontal area of the mini, its around the equivelant of having a flat a4 sized sheet bolted in the air flow.




Are carrying out all of these mods yourself, not trying to be rude as I have no idea of your skills or knowledge, but not knowing what a plenum chamber implies to me that it's limited and that this kind pf project your proposing may require alot more reading. Again not trying to be mean there.


Ben

[Liam Mini 35]

yes you are correct in thinking that my knowledge is limited. i am relaying on my mates in the mini club who have offered to help me re build it. the shell will be sent off to a professional to have the body work dne and roll cage put in. as for putting it back together i am planning on doing it. (i know its not that simple) with the engine me and the mini club would have no problem building a N/A engine as we have helped each other build a few, but none of us have built a turbo unit up. im obviously the least experience and would like to try and get my head around the jobs invovled with going turbo, and what specs would get the results im after. another quick question i would like to ask. what is the difference between a normal hif 44 and a turbo hif 44?

thanks for all your help and knowledge guys, its greatly appreciated.

o yes and the roll cage will be a must as i am planning on using the car on the road and would like to have a bit of protection with having GRP doors etc.