Stock Engines and Turbo Kits

mickfred · Postby **mickfred** » Thu Jul 19, 2007 10:36 am

Hi guys and girls,

This question may have been done to death already, but trolling through posts and searches, bores me to tears... so here it is.

1. How do the stock Mx5 engines(both 1.6 and 1.

handle bolt on turbo kits??
- how much boost?
- what is safe?
- what is not safe?
- does a 1.6 handle this better then a 1.8?

2. How do stock engines with lots of KMs handle bolt on turbo kits?
- i.e. 200,000kms.

Mechanics that I know and have spoken to about this would tell me off for thinking about this, but so many people here have done it.

Thanks guys!

Michael

EDIT:
SORRY, I just realised I posted this in the wrong place!

1 more question.....

Q: How much power output will the stock 1.6 and 1.8 handle at the relevant boost settings??

lowmiata · Postby **lowmiata** » Thu Jul 19, 2007 11:09 am

1. How do the stock Mx5 engines(both 1.6 and 1. handle bolt on turbo kits?? both well
- how much boost? up to 12 is fine
- what is safe? up to 12
- what is not safe?no more than 12-14 if you want reliability
- does a 1.6 handle this better then a 1.8? both would be about the same really just more out there for the 1.6 because it got to the aftermarket first though now 1.8's i think are catered for more now

2. How do stock engines with lots of KMs handle bolt on turbo kits?
- i.e. 200,000kms
mines doing fine with 300,000
New engine turns up today though(rubs hands together) :mrgreen:

Just do it already!
everyone is doing it!
leave it with me for two weeks and some money and i'll do it!

jules · Postby **jules** » Thu Jul 19, 2007 12:10 pm

Fingers in ears time boys.
Sings lalalalalalalala loudly so you can't hear Ryan and get tempted.

Jules

ampz · Postby **ampz** » Thu Jul 19, 2007 2:43 pm

310000Kms and happily boosted :mrgreen:

Only 6 psi atm but with the right fuel management an easy 9 psi.

Am i happy?
You bet!!!

lowmiata · Postby **lowmiata** » Thu Jul 19, 2007 2:49 pm

mickfred wrote:EDIT:
SORRY, I just realised I posted this in the wrong place!

1 more question.....

Q: How much power output will the stock 1.6 and 1.8 handle at the relevant boost settings??

my 1.6 is a happy 125kw atw on the mazfix dyno @ 7psi
but I have not had a great deal of time in the last two years to tinker with it so it has stayed stock boost

I would go to 12 but I havn't got round to setting it up so will do so when i can fly new parts in under the radar

for the new motor

not sure on the 1.8 someone with a 1.8 would be able to tell you

Jules.........................
why not make the quickest yellow car!
its only a couple of nights in the dog house if you purchase first then ask!
ask first and well your left out under the tree!!

I am keen to cut up another car!
stops me butchering mine!! :mrgreen:

jules · Postby **jules** » Thu Jul 19, 2007 3:46 pm

STOP IT, STOP IT, STOP IT!!!
I see you have become wise in the ways of the woman. :lol:

Jules

mickfred · Postby **mickfred** » Thu Jul 19, 2007 4:03 pm

jules wrote:STOP IT, STOP IT, STOP IT!!!
I see you have become wise in the ways of the woman.

Jules

We could do it together!

Benny · Postby **Benny** » Thu Jul 19, 2007 4:40 pm

If the engine has 200K on it, I wouldn't go over 8lbs (about 0.5Bar), which is about what an SP has as standard.
Higher boost may upset the rings.
A fresh engine should handle up to 12lbs as long as it doesn't ping.
If you are prepared to put in good rods and pistons, then you can go for 16 maybe even 18lbs if you de-compress the engine a little.

On 8lbs, around 150RWkW is easily achievable, and believe me, it will really go!

Once you've dríven a turboed 5, you'll never want to go back to NA one.

Boags · Postby **Boags** » Thu Jul 19, 2007 9:40 pm

A guy on the US forum ran 18PSI for 2 years on a bone stock engine. He drove it when the air was cold, had a good setup and a great tune. On a hotter day it pinged once and it was time to throw the engine in the bin.

You can root your engine on 6PSI if you run heaps of timing and no intercooler. Having seen UA's car I'd take Ryan's offer any day of the week if I had my time again. Looks the goods!

My car has 225000 on it now and doesn't blow a wiff of smoke, on 8 PSI.

I need a better fuel pump before I go higher than that.

Boags

mickfred · Postby **mickfred** » Fri Jul 20, 2007 9:46 am

Thanks Benny!

Boaga.... Out of Curiosity, what power output are you getting?

michael

Blue94t · Postby **Blue94t** » Fri Jul 20, 2007 10:08 am

My 1.8 has ~120k kms on it, makes 160rwkw, and has been running 15psi for ~30k kms of that. It has been turbo for ~45k kms. It runs 15psi rain, hail, or shine. In temps ranging from 5C - 38C.
I have run it as high as 20psi for a very short time, set it on 18psi for a while but decided drivetrain life was more important to me than the extra power (atm anyway).
I do have an EMS on the car though. I believe with a good map you can run high power levels safely as long as you don't get any detonation.

Jake

jules · Postby **jules** » Fri Jul 20, 2007 10:38 am

Boags'MX5 wrote:Having seen UA's car I'd take Ryan's offer any day of the week if I had my time again. Looks the goods!

Boags

x2

Boags · Postby **Boags** » Fri Jul 20, 2007 7:10 pm

mickfred wrote:Thanks Benny!

Boaga.... Out of Curiosity, what power output are you getting?

michael

Sadly, I am a slack shite and haven't been on the dyno. I hope to get real figures within a month. I'd be disappointed with less than 105kw atw. (SE power)

Boags

mickfred · Postby **mickfred** » Fri Jul 20, 2007 7:41 pm

pfft ....terrible

The Pupat · Postby **The Pupat** » Sun Jul 22, 2007 1:04 am

lowmiata wrote:1. How do the stock Mx5 engines(both 1.6 and 1. handle bolt on turbo kits?? both well
- how much boost? up to 12 is fine
- what is safe? up to 12
- what is not safe?no more than 12-14 if you want reliability
- does a 1.6 handle this better then a 1.8? both would be about the same really just more out there for the 1.6 because it got to the aftermarket first though now 1.8's i think are catered for more now

Pfft 15psi is where it's at ... don't be a p00f.