max boost before?
Turbo Mini Forums

well i got mine last night but after driving i have a few questions.

1, whats the recommended level of boost you should be running before add an intercooler?

2, on my current set up i have not got an intercooler (although there is one in the boot) but my acutator is set at 13 psi but on revs when it boosts it makes about 8 then i can hear a sound that sound like paper been blown in the wind, any ideas?

Other than that its very fun to drive

T

Edited by t@z on 3rd Oct, 2006.

Assuming a standard engine in good order then I personally would run no more than 10psi MAX.

Your "paper in the wind" noise sounds to me like a boost leak, check for split/loose pipes.

well being at a slight disadvantage of buying this car on ebay i dont know any compression i've only got the details below

*block bored to 1293cc
*omega pistons 5mm dish
*standared turbo crank
*big vave head, polished ported, broze guides
*new double heavey duty valve springs

but i guess a leak could be the answer as the turbo did seem to stall. i'll have a gander round it later if i can stand the heat.

Thanks, no doubt you'll be hearing from me soon :)

T

or the over boost valve in the plenum is a likely candidate

61 Austin Seven; building a 1275 'over the clutch' turbo, R5 T2'd, custom intercooled, megajolt electrified, canyon carver

www.motorlust.com - The Online Magazine for Car Guys Like Us

I'd guess around the 100-105bhp mark? That is purely a guess though.

that bloody valve had me fooled for over a year

well i haven't had time atm to look as i was a bit busy last night but i think it is blocked off. need to check this......

also a friend of mine said i need to be careful of pinking. what will happen when it pinks?

T

this is what will happen



or if your really lucky this!

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

wow, is there any sounds or signs that it is pinking or will you only know when its to late.

Yes, you can hear it going "pink! pink! pink!" (seriously).

It is most likely to do it when under heavy load, e.g. top gear 20mph full throttle.

Don't go out and try to make it do it now!

It is usually described as a metallic tinging/cracking noise, however once you know what it is you will always recognise it.

If you hear it BACK OFF THE THROTTLE IMMEDIATELY!

get a tin coffee can ,empty one , and put a small dead wasp in it , then put the lid on and shake it ,thats soft detonation ,now get the same can , and put a 1/2 inch ball bearing in it ,shake as before .those are your two ends of the detonation scale.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

just worried about this paper in the wind noise. nut i guess the turbo would continue to boost though wouldn;t it not stall if it was pinking.

T

if youve only got 5cc pistons then theres a chance your comp ratio could be a bit high (depending on head chambers tho) so i think you need to check whats been advised above then get it to a RR asap befor eyou brake something. unfortunatly its not realy just a cse of turning up the boost. otherwise you could go bang

no longer a series, but still 1.3 turbo.

well i'm gonna run it gently for now, but i think it could be a leaking manifold as i can hear a blowing noise.

i'm taking it to ace cafe tomorrow then when i can fix my other mini....( is see a trend here of broken minis) at teh weekend it'll come off the road so i can sort some guages out and the inside then i will get it rr.

they are so much fun but so much work.

T