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richalfa · Posted: Tue Dec 09, 2003 4:31 am Post subject: protune /33 1.7 road racer

i thought my 33 would intrest some of you,its taken me 3 years to build and is a trackday car ,but gets driven hard on the road,it started of as a standard 1.7 16v which was latter converted to carbs,but now its a normally aspirated 1.7 8v and i have done all the work myself at a low cost under 8k(Including buying and 2 blown up-engines,1 due to a 20pence part!)
it has very little standard stuff left ,everything has been altered,but remain's very road friendly and a starggering fuel economey 40 mpg+
it is very responsive in engine performance with a flat power delivery,and pin sharp steering and handleing and i have had some brilliant trackdays with it ,leaving lots of supercars standing too! Smile

for more info EM me at protune (richalfa.33btopenworld.com)
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mawhawhawhaw!!!

richalfa · Posted: Tue Dec 09, 2003 4:40 pm Post subject: alfa 33 1.7 16v pics

...
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mawhawhawhaw!!!

richalfa · Posted: Wed Dec 10, 2003 1:43 am Post subject: alfa 33 1.7 16v pics

heres how it all started!

and then this started to happen........

leading to this....
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mawhawhawhaw!!!

richalfa · Last edited by richalfa on Fri Feb 20, 2004 4:44 pm; edited 5 times in total

a few more pics of this project,and some info
ENGINE
1.7cc 8v na/ engine
reprofiled cams
idf 40 carbs
fully ported and flowed heads,standard 40 mm valves
16v pistons
baffled sump
solid lifters
oil cooler
magnacor race ignition
standard bottom end fully lightend and balanced
stainless exhaust system
full s/steel braided hoses
ngk race plugs

TRANSMISSION
1.2 gear ratio 5 speed box,armtech full throttle gear shift

SUSPENSION
lowered springs
koni front/rear ajustable struts
with powerflex bushes
non hydro rack

BRAKING
standerd calipers with all round disk conversion,standard pads (ferrodo)
s/steel braided hoseing ,hydro handbrake,bias valve

TYRES
205/40/17 toyo rubber

CHASSIS
fully lightened shell seam welded and strengthend
full aerodynamic bodykit
alloy race tank,seats,harnesses,
ap22 data logging ,

PERFORMANCE
145 bhp 135 lbf of torque
0-60 6.0 seconds top speed 125+
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mawhawhawhaw!!!

Peter D · Alfasud Joined: 15 Aug 2003 Posts: 60 Location: Denmark

Hi

Where are you using the car?

175 flb (lb ft) is not technically possible with 1,7 and non force-feed (no turbo, no supercharger). I suppose, that you mean 175 Nm, which is also very good, since you only find a handfull of factory vehicles, which can deliver more than 100 Nm/liter.

Peter (DK)

richalfa · Posted: Wed Dec 10, 2003 3:07 pm Post subject: alfapics

thats what is says on the rolling road torque curve ,i will put it up on hear for you,i was sceptical myself! Very Happy

(copy of rolling road test to follow)

its used for everyday on the road ,all though i somtimes use another car,because its a bit bumpy !!like driving a small van
i use it on the track about 10 times a year

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mawhawhawhaw!!!

richalfa · Posted: Wed Dec 10, 2003 5:24 pm Post subject: Re: Road racer transformation

paddy granger · Alfa Sprint Joined: 12 Aug 2003 Posts: 248

Interesting torque / power curves!! What happens at 3000 rpm? - There appears to be a huge dip. I assume that the cams are the reason for this. Also, I see that measurements were taken above 7000 rpm!!

Eddie W · Posted: Sat Dec 13, 2003 6:23 am Post subject:

Gearchanges Paddy? Is the peak torque being multiplied by 2nd gear as the standard motor is around the 4000 mark not 2070.
Regards Eddie
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A LITTLE FURTHER A LITTLE FASTER

Guest - Denmark · Guest

Wow - I like your Alfa 33 in race trim. It's really cool.

Nice forum site. Just found it Smile

Come and take a look at my Alfa

http://www.cardomain.com/id/alfa33qv

Greetings
Henrik (DK)

Eddie W · Posted: Sun Dec 14, 2003 9:34 pm Post subject:

With a further look at the chart , it definitely looks as though readings have been taken through the gears which is unusual. The definitive readings would be those in top gear (4th) which would give about 135 lbf of torque which would be more in keeping with the hp figure and still very good. Also this figure occurs at a higher rev range than standard which you would expect from a modded engine. Still it is a wicked bit of gear.
Regards Eddie
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A LITTLE FURTHER A LITTLE FASTER

Peter D · Alfasud Joined: 15 Aug 2003 Posts: 60 Location: Denmark

Fine that you sent the printout of the test.

It is done totally wrong, and now we see an explanation.

The first part of the chart is the running in the 1., 2, and 3. gear. It is of no use.

You can only use the part which is in the 4. gear and the speed versus rpm should be put in the computer for this gear (which I suppose it is).

Normally you start up in 1. gear, and then you go directly to 4. gear (or the gear you have decided and put in the computer, speed/rpm). Then you floor the throttle from as low as it can take, 1000 rpm if possible, and then you get the whole powercurve.

On your power curve you can only read out values from above 4.000 rpm and the max torque is at 5.000 rpm, not 2.500 rpm as you believed.

The meassured 135 lb ft is not bad, it corresponds to 184 Nm or 18 kpm and at a more (for a tuned engine) realistic 5.000 rpm.

Peter (DK)

Toad · Alfasud Joined: 19 Mar 2003 Posts: 42

Seen your Car in CCC magazine Smile

I must send you an email with a few question's. I have a Race Sprint and my Friend has a 33 16v. Maybe there are idea's and work on our cars that we could share?
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Shift for Brains

Dave_NZ · Posted: Fri Dec 26, 2003 5:21 am Post subject:

looks good. how well does it compare on the track to the suds. what are the wheels that you have on it now. they look very nice.

Dave
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Looking for a type 2 33QV in NL

richalfa · Posted: Mon Jan 12, 2004 2:46 pm Post subject: protune 33

thanks for the explaination for power readings !!!
that sounds correct....

The suds handle much better, in my opinion anyway, ive never driven a 33 as fast round bends as a sud can go,the wheels on the 33 are made by dare and i think they are rs2's ,if thats any help.
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mawhawhawhaw!!!

Paul Doc · Posted: Tue Jan 13, 2004 1:58 pm Post subject:

Love the wheels in the "...and leading to this" pictures! Where are those 75 style rear arches from?

richalfa · Posted: Thu Jan 15, 2004 12:21 pm Post subject:

you,ve just said it a 75... Smile

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mawhawhawhaw!!!

James Granger (n/l) · Guest

James Granger · Alfa 33 Joined: 10 Apr 2003 Posts: 302

richalfa · Posted: Mon Jan 19, 2004 2:01 pm Post subject:

i didnt have to make any modifications to make them fit ,they go straight on
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mawhawhawhaw!!!

Serpent · Guest

richalfa · Posted: Fri Feb 20, 2004 4:57 pm Post subject:

the carbs are set up with 32 mm choke size and are dellorto 40's,
the engine is in bits at the mo ,as it needed a rebuild ,im going for bigger stainless inlet valves and will try out a differnt cam too,
im aiming at getting some more power out of it this time,it seemed there was a good power increase with just the cam's ,and light porting ,with the increased compression ratio i managed 145 bhp and 135lbft of torque...
but the engine was using and old block with old pistons and bearings and was totally standard so its time for some more tinkering and £££
this time i will be building it propper,and will get the correct CR and deck height when i build the bottem end ,ive just had it all reground and some fresh bearings
im going to do some more head work too!
this time im hoping to see 160 bhp with the new cams and head work...
we shall see Very Happy

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mawhawhawhaw!!!

Edward · Alfa 33 Joined: 21 Sep 2003 Posts: 307 Location: Bristol

Hi there,

You mention in the early part of the text that the original setup was carbs onto a 16V engine - can you explain how you managed to provide / produce a manifold that brought the outlet from the carbs to the inlet of the heads. It seems that some engineering is required here and I am looking for the best way to achieve this without too much reinvention of the wheel...

Thanks,

Edward.
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The faster the better.

loui · Alfasud Joined: 22 Feb 2004 Posts: 29 Location: Scotland

I'm running a 1.7 16v injection engine on twin Dellortos (DRLA 36?) in a Mk2 1.5 Ti. The unit came from an early 16v 1992 J plate. Just before the front suspension was changed.

Mounting the carbs was the least of my problems.
The mounting plates were the originals from the injection engine.
Everything lined up and the fitting was straight forward.

Only difference was a small v shaped cut section in the plates (cylinder barrell) on the inside, where the injectors went into the cylinder. All closed up properly with the carb gasket set. Don't think it would have cost much to have the v shapes filled with some sort of alloy welding and cleaned up. Planned to do that if it caused a problem
The car has been running with this setup for 2 years (12,000) miles)

Also ran it on twin Webbers for a short period and didn't like the noise.

Main problem was running a fuel pump and regulator to suit the carbs.
The injection fuel pump is not suitable for a carbed engine.
The car suffered fuel starvation at high speed (Motorway+) and during hard prolonged acceleration. Have now fitted a competition pump and regulator. Need to visit a rolling road to have the carbs suitably jetted and the regulator set.

Have wrote down what I did at www.stopthemetalmaggot.co.uk

richalfa · Posted: Tue Mar 30, 2004 3:14 pm Post subject: CARBS ON 16V

I went about it a harder way than the above mentioned ,i went to an aircraft engineering company to get some billet aluminium i got given a large block (for free!)and they even cut it into two pieces suitable for the manifolds,to which i had two holes board in each,at a machine shop (£15) and i basicly fettled them into shape with a drill (best use an air grinder)
,i never managed to achieve its full potential so i cant say what it was like!!
as im now useing an 8v engine of which has proven superior in the money and performance side,and being so much easyer to work on and tune....
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mawhawhawhaw!!!