Giulia 1300 power increase

Jacques-Pierre · #1 (**permalink**) 10-06-2009, 04:21 AM

Hi there Alfisti
I have a Giulia 1300 Super. The car is not as enjoyable as an Alfa could be. Compared to my two 2 litre Alfas, performance is lacking. Best way to increase performance would be to install a 2 litre, but the car is so original, I do not want to go there.
What I have in mind are a few basic upgrades, that are 100% reversible.
What are your thoughts on installing the 2000 euro cams, the 10548"s? And the fitting of an electric fan should release a few horses. Anybody done these before, are they worthwhile? Other suggestions of a non-invasive nature.
Engine does not need other attention, mileage is still very low. (Dellorto equiped.)

As far as handling goes, going for 185/70/14 tires in stead of the old cross ply Dunlops.

Thanks

**Subtle** · #2 (**permalink**) 10-06-2009, 07:01 AM

You might consider Richard's torquey cams-- Alfar7

Electric fan is worth about 4 hp, and diminishes the noise.

Jacques-Pierre · #3 (**permalink**) 10-06-2009, 07:09 AM

Thanks Bob

I would gladly get rid of the fan noise...

I have had a set of 10548's at home for years. It only now struck my mind I could possibly use them in the Giulia. Any idea on the specs of those torquey cams?

The 10548's lift just about half a mm more than 1300 cams and have 3 or 4 degrees more duration I gather. They should also be torquey, but I might be wrong...

Thanks

GTV-GR · #4 (**permalink**) 10-06-2009, 12:17 PM

the 1300 to create power you need to spend big bucks , NOT WORTH A SINGLE cent.
Leave it be

**Subtle** · #5 (**permalink**) 10-06-2009, 07:48 PM

Quote:

Originally Posted by Jacques-Pierre

Hi there Alfisti
I have a Giulia 1300 Super. The car is not as enjoyable as an Alfa could be. Compared to my two 2 litre Alfas, performance is lacking. Best way to increase performance would be to install a 2 litre,

Thanks

**Alfar7** · #6 (**permalink**) 10-06-2009, 08:34 PM

Search the BB for threads. The 10548 cams are profiled on "Mystery cam thread" some time ago. The Thread listing many other cams is below. Unfortunately the BB is not friendly to my format.

http://www.alfabb.com/bb/forums/engi...-profiles.html

However, the 10540-01 cams are not "torquey" cams, the 2 liter motor overcomes them somewhat. They are better set at 102/104 LCs than factory settings. And really have no place in small motors unless intake only with "real" exhaust designed cam paired with (as all cams should have).

Jacques-Pierre · #7 (**permalink**) 10-06-2009, 11:24 PM

Thanks Richard. I will have a look there. Much appreciated.

GTV-GR, I hear you. But I am realistic about power increases here. Not looking for 2 litre power here, but merely an improvement. Every little bit helps.

Veep · #8 (**permalink**) 10-07-2009, 08:40 AM

just put in a 2 liter, or maybe better a good 1750, and keep the 1300 in storage. You say the car is so original... but most people won`t see there is a 2 ltr or 1750 inside. And originality is easily restored with some spanners and a little time..
They allready did this when the cars were allmost new still, so why not 40-45 years later? its a mod in the spirit of the old days. But spend no money on tuning a 1300, not worth it imho...

**d.albe72** · #9 (**permalink**) 10-26-2009, 05:11 PM

I have a 1300 TI, I transformed it in a super with dellortos (30 mm chokes) , C&B 109/280 cams and super rear axle. Smoothed ducts, three angles seats, anti-reversion working on intake valves. Head skimmed 1,4 mm, rc should be somewhere around 10,5.

Great revver, chrono measured at 185 km/h. But if you are looking for a pleasant drive, you can't get an enjoyable torque. Or, at least, I hasn't been able.

A 1600 is alone a big improvement, and you are not obliged to change the rear axle ratio.

However, eliminating fan is really impressive in noise reduction!

Alberto

yvesmontreal · #10 (**permalink**) 10-26-2009, 06:22 PM

Some people report good results with aftermarket 77mm pistons; they increase displacement to 1400 cc, but of course that involves rebuilding the engine.

Slipping a 2000 or 1750 in your car is not that straightforward if it's an early one with the non-hydraulic clutch.

Besides, a stock 2000 is not a happy revver like a 1300 or 1600. On my 2000 GTV I sort of miss that. Of course a performance 2000 with head work, high compression pistons, cams, lightened flywheel, etc. will get you the best of all worlds... but clearly that's not what you're looking for.

**Subtle** · #11 (**permalink**) 10-26-2009, 06:40 PM

On my 2 L with RJ cams, head work and lighter weight of the 101--the revs come up rather quick. Quick enough that I put in a shift light and soft rev limiter.

Set at 6500 on the latter--next season going to 7000.

Jacques-Pierre · #12 (**permalink**) 10-29-2009, 12:39 AM

Have been way for a few days. Thanks for all the replies.

As a matter of interest. I own a Giulietta 2L from 1985. This car features 10.8 cr, porting work by Dawie De Villiers of Glenwood and 10.9 mm 280 deg cams. Plus many other smaller items including a modified distributor advance curve. It revs up quickly, but in normal driving feels very "standard", but the torque is what is really impressive on this car....

Getting back to the 1300. It seems like Alberto has had some good results on his 1300. And, yes, I look forward to the noise reduction by taken off that fan.

I have not had time to do these things yet. I have however attended to rebuilding and tuning those Dellortos. Nice improvement in smoothness even from this. Have to fix a binding front caliper before I commence with the engine stuff. As a matter of interest, my Giulia is a bit of a mix up, as often with South African built Alfas. The gearing/axle ratios are 1600. So is the rest of the body and interior. The brakes are the larger 2000 items on the front.

Giuseppe Signorrelli here from Pretoria informed me that he installed a few of the 1500 cc kits to 1300's way back when those were available. He reckons the results were impressive!

Regards

**d.albe72** · #13 (**permalink**) 10-29-2009, 06:13 PM

Quote:

Originally Posted by Jacques-Pierre

Have been way for a few days. Thanks for all the replies.

As a matter of interest. I own a Giulietta 2L from 1985. This car features 10.8 cr, porting work by Dawie De Villiers of Glenwood and 10.9 mm 280 deg cams. Plus many other smaller items including a modified distributor advance curve. It revs up quickly, but in normal driving feels very "standard", but the torque is what is really impressive on this car....

Getting back to the 1300. It seems like Alberto has had some good results on his 1300. And, yes, I look forward to the noise reduction by taken off that fan.

I have not had time to do these things yet. I have however attended to rebuilding and tuning those Dellortos. Nice improvement in smoothness even from this. Have to fix a binding front caliper before I commence with the engine stuff. As a matter of interest, my Giulia is a bit of a mix up, as often with South African built Alfas. The gearing/axle ratios are 1600. So is the rest of the body and interior. The brakes are the larger 2000 items on the front.

Giuseppe Signorrelli here from Pretoria informed me that he installed a few of the 1500 cc kits to 1300's way back when those were available. He reckons the results were impressive!

Regards

PSk · #14 (**permalink**) 10-29-2009, 07:19 PM

I suggest you drive your 2ltrs when you want to go fast, and when you want to enjoy the scenary, etc. drive your nice and original 1300.

Can't see the point in trying to make the 1300 go as fast as the 2ltrs you already own, but great to be able to choose cars based on your moods.
Pete

Jacques-Pierre · #15 (**permalink**) 10-29-2009, 11:54 PM

Yes, the 1300's intention is not to be a 2L beater. Just going to do the fan and the slightly hotter cams and then stop. The BHP/Money ratio not worth it.
No substitute for cubic centimetres then.

As it is, the 2L Giulietta is already my toy for going fast. It has the brakes and suspension mods to match too. Hooligan car.

Problem with moods and Alfas is that I usually end up choosing that Giulietta..... thus the intended mods for the Giulia, just to make it slightly more exciting. Otherwise it just ends up standing for months on end in the garage, which is never a good thing.