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Offline Aircon

  • Master Baiter 300kph+ club
  • Who said it couldn't be done?

  • Joined: Mar 2007

  • Drives: TBA
  • Location: Melbourne, Australia
  • Name: Peter
328GTS will be added later
I love my car. Buy your own



Offline carl888

  • Soap Dropper
  • Get her groggy, do her doggy

  • Joined: Feb 2008

  • Drives: OHOS
  • Location: Melbourne
  • Name: Carl Jones
Thanks for organising the day Pete!

All I can say is.....................those old carby cars are just friggin wonderful!

How was the AFR ratio on the GT/4?

Carl.



Offline Aircon

  • Master Baiter 300kph+ club
  • Who said it couldn't be done?

  • Joined: Mar 2007

  • Drives: TBA
  • Location: Melbourne, Australia
  • Name: Peter
Thanks for organising the day Pete!

All I can say is.....................those old carby cars are just friggin wonderful!

How was the AFR ratio on the GT/4?

Carl.


a bit rich......just under 12....but not rich enough that i'd change anything....but the mixture was totally flat all the way through the rev range.

looks like i won't have the graph until next week, but the aussie 328GTS got 130kw

I love my car. Buy your own



Offline Ferrari Fissatore

  • Soap Dodger

  • Joined: Jan 2007

  • Drives: its obsession
  • Location: under its skin
Dynos are strange things..
on that same dyno in same mode, I got 176 bhp/133kw at the wheels from a stock standard carb 308 with one exhaust cam a tooth out of time.... I dyno'd it becasue it was noticably down on power on the road, so i tested it.

I didn't dyno it after it was fixed, but it was certainly a lot faster than when it had 176 BHP at the wheels!

I'm very surprised a AUS 328 had more power than your modified GT/4.

Have you weighed them all yet?







Offline Ferrari Fissatore

  • Soap Dodger

  • Joined: Jan 2007

  • Drives: its obsession
  • Location: under its skin
a bit rich......just under 12....but not rich enough that i'd change anything....but the mixture was totally flat all the way through the rev range.

looks like i won't have the graph until next week, but the aussie 328GTS got 130kw



Probably lean off a bit with the little bit of ram air whilst driving. Just about perfect.. 0.80 lambda... safe but on the rich side...

What jetting did you put in it after all your exhaustive testing and tuning?... idle/air/main/emulsion? Std choke size still?

What exhaust is on the GT/4? and std AU headers or changed for something else?



Offline Aircon

  • Master Baiter 300kph+ club
  • Who said it couldn't be done?

  • Joined: Mar 2007

  • Drives: TBA
  • Location: Melbourne, Australia
  • Name: Peter
Dynos are strange things..
on that same dyno in same mode, I got 176 bhp/133kw at the wheels from a stock standard carb 308 with one exhaust cam a tooth out of time.... I dyno'd it becasue it was noticably down on power on the road, so i tested it.

I didn't dyno it after it was fixed, but it was certainly a lot faster than when it had 176 BHP at the wheels!

I'm very surprised a AUS 328 had more power than your modified GT/4.

Have you weighed them all yet?






the GT4 got 25hp more on other dyno i've been on before. i reckon all those numbers are low, but it was good enough for comparison sake which was all you can do on these things anyway.

my 'modified' GT4 err...yeah...ok...it's errr...yeah...

anyway...i was very happy with the result.

I love my car. Buy your own



Offline Aircon

  • Master Baiter 300kph+ club
  • Who said it couldn't be done?

  • Joined: Mar 2007

  • Drives: TBA
  • Location: Melbourne, Australia
  • Name: Peter
Probably lean off a bit with the little bit of ram air whilst driving. Just about perfect.. 0.80 lambda... safe but on the rich side...

that's true....plus it'd lean out in summer too, and it's not rich enough to do anything bad, it's just not optimal.


What jetting did you put in it after all your exhaustive testing and tuning?... idle/air/main/emulsion? Std choke size still?

i'm too embarrassed to say


What exhaust is on the GT/4? and std AU headers or changed for something else?

standard AU headers...not sure what the muffler is....but it's much more quiet than the 328's tubi



I love my car. Buy your own



Offline Ferrari Fissatore

  • Soap Dodger

  • Joined: Jan 2007

  • Drives: its obsession
  • Location: under its skin
the GT4 got 25hp more on other dyno i've been on before. i reckon all those numbers are low, but it was good enough for comparison sake which was all you can do on these things anyway.

my 'modified' GT4 err...yeah...ok...it's errr...yeah...

anyway...i was very happy with the result.



ok..

and yeah... modified GT/4... Hi comp Pistons and over bored +1mm from 2927cc to 2992cc, heads modified/ported, valves, ignition, and jetting... that I know of... and who knows what else I don't know?... so, yeah. Modified.



Offline Ferrari Fissatore

  • Soap Dodger

  • Joined: Jan 2007

  • Drives: its obsession
  • Location: under its skin
i'm too embarrassed to say


*sigh*

ok, I'll look it up on fchat



Offline Aircon

  • Master Baiter 300kph+ club
  • Who said it couldn't be done?

  • Joined: Mar 2007

  • Drives: TBA
  • Location: Melbourne, Australia
  • Name: Peter
ok..

and yeah... modified GT/4... Hi comp Pistons and over bored +1mm from 2927cc to 2992cc, heads modified/ported, valves, ignition, and jetting... that I know of... and who knows what else I don't know?... so, yeah. Modified.

*sigh*

I love my car. Buy your own



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