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Fris75turbo · Post by **Fris75turbo** » Fri Sep 08, 2006 9:31 am

Hi everyone!
I think to change my cam on 1.8 turbo and one question come to my mind (maybe sound stupid, sorry):
Can i simply change turbo intake crap-cam (8mm lift

) with standard 1.8ie intake cam (11mm lift)

?
Jim, Barry, Mats...

Thanks for help

Mats · Post by **Mats** » Mon Sep 18, 2006 1:09 am

Yes you can! (and you should)

Not sure what the management will think about it but I'm pretty confident the flappy meter will be able to tell the ECU what's going on, you should have an eye on the boost gauge though and also check that the duty cycle of the injectors are in the comfort zone.

Fris75turbo · Post by **Fris75turbo** » Mon Sep 18, 2006 9:18 am

Hi Mats!
I'm happy to see you here

Thank you for view tips...
If something goin' wrong, always stay me safe change: #10548

I'm the Rookie (not Rocky

) in this "business", so i need all possible help of you and other good people from this forum

Right now, in my country you can't buy 98oct fuel... nowhere

So, can you imagine what kind of "party" i have with ignition timing, becouse i drive with 92oct...
Engine is "plenitful" of Horse Power

My Knock Sensor works like light-show on some tehno party with maximum 0,25bar

BTW, your 75 Turbo is just amazing

I'm totaly mad about Black 75's

Is it stock?
Probable not

p.s.-how much cost used Turbo QV manifold?

Mats · Post by **Mats** » Mon Sep 18, 2006 11:34 pm

Thank you, my 75 is quite standard actually, Evo Manifold (is this what you call QV?) and a Mitsubishi turbo from a Volvo T5 + 3" exhaust are all the engine mods. Drives very nicely with that turbo though, more power with the same boost as a std turbo.
Got some more done in the chassis department with poly bushes and uprated rear springs and Bilsteins, I also have the factory option front anti-roll bar (28mm), makes the need for stiffer torsion bars less desperate, now it is easy to drive fast and have fun with on the street.

92 octane RON? holy shit we can't even buy that here, the lowest we got is 95 and now that Shell started to sell V-Power we have >99 octane too.

Naturally I can buy race fuel too but that is a bit too expensive for street use.

Fris75turbo · Post by **Fris75turbo** » Tue Sep 19, 2006 6:59 am

That's fuel is 95, but only in the name-actually is 91-92oct

We have here very big problem with fuel quality

Evo-manifold, yes! I think that's the same manifold like on Seria Numerata ('91) or QV (90'-92') with 165hp, right?
With this kind of mods, your 75 probable have 180-200hp

Did you have a lot of problem to set Mi-turbo on Evo manifold?

Mats · Post by **Mats** » Tue Sep 19, 2006 7:37 am

I have a feeling people generally expect too much when it comes to the 75 turbo, for starters I don't believe it has 155Hp from the factory and I don't believe for a second that you can have more then 190-ish Hp withouth larger injectors or similar (well, not for long anyway

).
I'm guessing my 75 has around 160-165Hp and no more. It drives really well but it's no where near what my Delta felt like and that was rated at 185Hp and had a 4wd drivetrain, i.e. the 75 can not have even close to that kind of power.

The turbo wasn't too difficult to match up to the manifold, I had to extract a couple of studs and redrill the holes to take M10 studs instead of M8 + a spacer to make the mitsu match the manifold surface. The Mitsu turbo has a labyrinth sealing surface that needs to be seated properly but it's basically no biggie, just a little bit larger surface then the 75 turbo.

Fris75turbo · Post by **Fris75turbo** » Tue Sep 19, 2006 2:33 pm

No 155hp? Don't make me cry

In that case, right now my turbo probable have around 100hp

In early days, Alfa was have bad habit to pump hp only on paper

Today, they probable goes reverse...

Will be ok to put Bosch 0280.150.712 injectors (270cc/min) and Bosch 0.580.464.069 fuel pump (4bar-98lit/h)?

Oversteer · Post by **Oversteer** » Tue Sep 19, 2006 4:21 pm

hi there!

Don't know about you guys, but my 1.8TB sure feels up to the 155bhp declared! As long as the damn trottle body potentiometer works ok, though...

Have you tried the 1.8 ie cam on the turbo yet?

Mats · Post by **Mats** » Wed Sep 20, 2006 8:04 am

Yes, it feels fast but it is only because the boost kicks you in the back when the turbo starts to deliver, it really isn't that fast even if you compare it to newer/heavier 150 turbo cars.

rz · Post by rz » Wed Sep 20, 2006 8:24 am

www.squdra-tuning.com for a 210hp chip , thats all you need for power

Fris75turbo · Post by **Fris75turbo** » Wed Sep 20, 2006 8:38 am

Hi Oversteer!
I was see pictures of your Turbo on AlfaBB

You have very, very nice car

They are 100% original, right?
I have view plans for this winter for mia bella and one of this is to change intake cam (or maybe both

). In this moment, i wait my very good friend, he try to find me par of #10548

He got three Alfa motors in small parts all over he's garage:
1300GT Junior, 1600 and (maybe The Holly Grall for me) 1750!

Cam from 1.8ie is my second choice, becouse it's a experiment

Have you something similar in plan for your TB?

Hi RZ!
Squadra Chip for 1.8TB gives you a 195hp, right?

http://www.squadra-tuning.com/English/EN_alfa_75_TB.htm

@Mats
What you thinkin' about this injectors and pump:
Bosch 0280.150.712 injectors (270cc/min) and Bosch 0.580.464.069 fuel pump (4bar-98lit/h)? Enough or to many? Wrong choice?
And please, if you can remember, price of Evo-Manifold?

Regards everyone!

Oversteer · Post by **Oversteer** » Wed Sep 20, 2006 9:58 am

Well, the cam issue just came to my attention due to its conservative lift, and therefore, the 1.8 ie cam could be a modification that could bring some extra grunt at low cost.

But for now, i just want to solve the potentiometer problem that's killing me right since I bought the car, last May, and enjoy a 100% stock 1.8 TB!

Well, not quite, because this set of Blistein shocks and Eibach springs have just arrived today!!

Barry · Post by **Barry** » Wed Sep 20, 2006 10:12 am

Wish we got the more modern turbo cars here...

All I had was a few Turbodelta`s..

Oversteer · Post by **Oversteer** » Wed Sep 20, 2006 11:43 am

Those engines amaze me! Mainly because they have no air cooler. It's the turbocharger blowing directly to the carbs! Well, the 75 TB cooler is crap, anyway...

BTW, what's that thing on the top of the exhaust manifold?

Barry · Post by **Barry** » Wed Sep 20, 2006 11:57 am

Alfa Romeo in their wisdom thought it better to use EXHAUST back pressure to open the wastegate..
I,In my wisdom(

)I decided to use intake manifold pressure to open the wastegate..so I modified it with some Rajay parts and some ally...

You might also notice an old " Kieko sikki" blow off valve on the intake ...
Worked extremely well..I had a lean mixture backfire and blew that nicely made intake manifold to shit street...