MORE POWER..... No, im not clarkson, yet...

Started by will lesslie, March 20, 2017, 08:18:51 AM

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will lesslie

Hi All,

I have taken my 81 2l 116 out a few time in regularity and super sprint races. However being ever the optimist I see no problem with the car in due course beating some slower 911s. Handling is spot on at the moment, been lower, stiffer bars ect.

However power is still stock, if not below. I Find the main problem is that the car doesnt want to rev out and seems to run out of puff at 5.6K. We have sitting in the shed a group 1 head which ads another 30HP, but would like to strengthen the bottom end first.

Currently the engine is running:
DHLA 40G Dellorto Carbies
Standard Magnetti mareli Dizzy

what can we do with those, bar bin the dellortos because everyone says to do that.


Cheers

Will
The closer you are to death the more alive you feel, its a wonderful way to live, and the only way to drive..

Paul Gulliver

Paul Gulliver
Present
2017 Silver Giulia Veloce
1979 Silver Alfa 116 GTV Twin Spark
1973 Red Alfa 105 2.0 GTV

Past
2013 Giulietta QV
2006 Black 159 2.2 J
1970 Dutch Blue Series 2 1750
1975 Blue Alfetta Sedan 1.8
1981 Piper Yellow Alfetta GTV 2000
1985 Red Alfetta GTV2.0
1989 White Alfa 164
2000 156

carlo rossi

no use what you have
'there is alot out there
those carbs are fine up to 160hp
stock is 122hp
you need cams and carb tuning
its all in the blogs go searching
current cars
red 83 gtv 2.0


previous cars
Red 76 1.2/1.5 alfasud ti
white 79 alfetta 2000
alfetta 74 1.8
escort Lotus twin cam
bikes
ducati 900 ss 1979
moto morini 3 1/2 sport 1975/6
Moto morini 3 1/2 valentini speciale 77 oh and a deltek rockhopper

V AR 164

Present:
-1992 164Q
-1993 Hilux Surf

Past:
-2006 159 2.4 Ti

carlo rossi

current cars
red 83 gtv 2.0


previous cars
Red 76 1.2/1.5 alfasud ti
white 79 alfetta 2000
alfetta 74 1.8
escort Lotus twin cam
bikes
ducati 900 ss 1979
moto morini 3 1/2 sport 1975/6
Moto morini 3 1/2 valentini speciale 77 oh and a deltek rockhopper

will lesslie

The closer you are to death the more alive you feel, its a wonderful way to live, and the only way to drive..

GTVeloce

In all seriousness, go the TS route. Bolt in 150 reliable horses. Yes, a busso will be better (but not as balanced) and a lot more work to make it happen. I can install a TS in a weekend so not too hard to do.

Working a Nord is expensive, time consuming and will never be as reliable as a stock TS.

And I am not just saying this because I am about to offer one for sale!!!

V AR 164

Quote from: GTVeloce on March 20, 2017, 09:53:13 PM
And I am not just saying this because I am about to offer one for sale!!!

Really....  ;D
Present:
-1992 164Q
-1993 Hilux Surf

Past:
-2006 159 2.4 Ti

carlo rossi

hes right except you have an almost 30 year computer running your motor
and 150hp for a nord reliable will cost you 2 cams $250 carb setup $200
So if the motor is under $600 take the motor
current cars
red 83 gtv 2.0


previous cars
Red 76 1.2/1.5 alfasud ti
white 79 alfetta 2000
alfetta 74 1.8
escort Lotus twin cam
bikes
ducati 900 ss 1979
moto morini 3 1/2 sport 1975/6
Moto morini 3 1/2 valentini speciale 77 oh and a deltek rockhopper

Paul Gulliver

#9
I have an Alfetta  that has had a Twin spark motor transplant for the last eight years. It  is used for both track & road . Whilst plenty of things have been changed or replaced over that period the computer ECU is not one of them it has run faultlessly. Hop in turn key and away you go . EVERY TIME.   I also have a 105 ( Nord), whilst it is an older car it is more hop in turn key  close eyes and hope.  I think  if you are only going to spend a few hundred dollars on cams and carbies their is a very big / optimist hope that every thing else in your 40 y.o set up in just fine.

PS You ought to be able to pick up a twin spark motor for a little over $1,000 
Paul Gulliver
Present
2017 Silver Giulia Veloce
1979 Silver Alfa 116 GTV Twin Spark
1973 Red Alfa 105 2.0 GTV

Past
2013 Giulietta QV
2006 Black 159 2.2 J
1970 Dutch Blue Series 2 1750
1975 Blue Alfetta Sedan 1.8
1981 Piper Yellow Alfetta GTV 2000
1985 Red Alfetta GTV2.0
1989 White Alfa 164
2000 156

GTVeloce

I have two TS engines that I have owned for a number of years and have done many kms on them (I currently do 60k km a year in a 75 TS). A few of the electrical components have failed but the ECU has never been one of them. It is very rare to have one fail on you. They really are a bullet-proof engine. And I think they sound much better than a stock Nord.

carlo rossi

I will concede that the twin spark is a better motor and so it should be the NORD origins is 1953
BUt and its a Big BUT
a) whats your budget?
b)how original do you want to keep the car for future value

and on the ECU, I have no doubt that the ecu will last for 30 years
what I am saying is that a dellorto is good for technically 100 years
( with service) I will stake my left wingnut that the ECU wont !!
ever wonder why manufacturers give a 3-5 YEAR warranty from NEW
not from 30 year mark  plus electrics dont last and italian electrics less so
i know I have  45 year old moto cycles with 45 year old ecu's ( italian)
whats the one thing on the bike giving me problems
you guessed it !!
current cars
red 83 gtv 2.0


previous cars
Red 76 1.2/1.5 alfasud ti
white 79 alfetta 2000
alfetta 74 1.8
escort Lotus twin cam
bikes
ducati 900 ss 1979
moto morini 3 1/2 sport 1975/6
Moto morini 3 1/2 valentini speciale 77 oh and a deltek rockhopper

GTVeloce

Perhaps one of the reasons these engines last so well is that the ECU and all engine electronics are German... Bosch.

carlo rossi

perhaps Bosch do it better than ducati Electronica
in fact im probably sure of it
but it still wont be as reliable as a carby
and ask anyone with an air cleaner off a twin carb Nord
as opposed to an injection '
one is pure acoustic symphony the other is revvy
it really does depend what you like in fact the more I type
the more i would like one of both !!around town the TS would be more friendly
There you win! ill go back to dinotopia and listen to my senorous pleasures
of a twin cam twin carb howling at 6500rpm
current cars
red 83 gtv 2.0


previous cars
Red 76 1.2/1.5 alfasud ti
white 79 alfetta 2000
alfetta 74 1.8
escort Lotus twin cam
bikes
ducati 900 ss 1979
moto morini 3 1/2 sport 1975/6
Moto morini 3 1/2 valentini speciale 77 oh and a deltek rockhopper

105gta

Hi Will, From your post I assume you mainly use the car in the road and would like to keep it that way. You mentioned you have a Group 1 head available, is this something that you'd like to use to keep costs down, is it serviceable as is or does it need full reconditioning? What makes you think the head you have actually is a group 1 head?
Seems everyone missed your real question of the bottom end of the engine.
Sounds like your engine is just tired and lacking full potential hence you're not revving as freely as you'd like.
I guess my question to you is what are you wanting? A full race engine or just a nice bump in power and drive-ability keeping it roadable yet fun?
Many pros and cons come with engine transplants from other variants including TS swaps.
1967 Giulia Sprint GT Veloce (WIP)
1985 GTV6 (WIP)