User avatar
GarthW
Verde
Verde
Posts: 631
Joined: Sat Mar 24, 2007 12:43 am
Location: Melbourne, Australia

550hp+ Alfa 75 Twin Spark Turbo

Post by GarthW »

I went to a Alfa club gathering last night at a alfa workshop here in Melbourne. I met Venables from this forum who was there, well he actually came and introduced himself, nice of you Scott! :wink:
There were some nice cars there, one in particular was a very modfied 75 twin spark with 460HP at the wheels, 25psi, and it hasnt been properly tuned yet, will have over 500hp at the wheels easily...yes i took a quick video, but i filmed it upside down, so wont be uploading it. :oops:
Image
I know your all saying, no way can it take that power, but i took pics of the de dion rear which will be going in. Nothing was standard of course, it came complete with Holinger straight cut gears.
Image
Image
Image
Image
Image

Selling 1985 GTV6.

Ecu and injectors, lightened.....plays music.
User avatar
Terafrost
Gold
Gold
Posts: 60
Joined: Thu Sep 17, 2009 7:43 am
Location: Hobart, Tasmania (AUS)

Re: 550hp+ Alfa 75 Twin Spark Turbo

Post by Terafrost »

Very impressive! Did you get to talk to the owner about the gearbox? I'd love to know how his is still intact... :|
Alex

1985 GTV6
1983 GTV6 - Project
1985 ALFA 90 GCL - in many, many pieces... Anyone?
1987 ALFA 75 TwinSpark - Now running around Victoria.
User avatar
Mats
Verde
Verde
Posts: 4059
Joined: Mon Nov 29, 2004 12:26 am
Location: Gothenburg, Sweden
Contact:

Re: 550hp+ Alfa 75 Twin Spark Turbo

Post by Mats »

Come on... Larger images, the right side up ffs! :)

And rotate the video in post, it's easy! :P
Mats Strandberg
-Scuderia Rosso- Now burned to the ground...
-onemanracing.com-
-Strandberg.photography-

GTV 2000 -77 - Died in the fire.
155 V6 Sport -96 - Sold!
User avatar
GarthW
Verde
Verde
Posts: 631
Joined: Sat Mar 24, 2007 12:43 am
Location: Melbourne, Australia

Re: 550hp+ Alfa 75 Twin Spark Turbo

Post by GarthW »

Hey Tera...yeah i can find out more about it, maybe someone else who was there that night may be able to chime in with some info about it. All i know is that no expense has been spared with this car, all forged internals, Motec inj. Tera he said its how you drive it, amazingly the rear end held together on its dyno run.

But i know standard rear end will take 350hp, but anyway its un-registered and really only for the race track.

Mats-How do i rotate vid around...? Have tried, and i dont see anything to do this...?
Sorry if the photos arent large enough, i didnt have my camcorder on me, only my phone. But save them and then just zoom in on them.
Image

Selling 1985 GTV6.

Ecu and injectors, lightened.....plays music.
BradGTV
Gold
Gold
Posts: 133
Joined: Thu Sep 24, 2009 2:55 am
Location: South Australia

Re: 550hp+ Alfa 75 Twin Spark Turbo

Post by BradGTV »

that is insane! :twisted:
what is done about the driveshaft?
do you know any specs of the engine, CR, valve sizes, monosleeve?
corect me if wrong but wouldnt the plenum need to be upgraded for those hp levels? and the distributers replaced with wasted spark or individual coil packs?
79 GTV (sr20) 83 GTV (TS) 85 GTV, 76 GT, 84 GTV6, 91 164, 88 75 TS & 89 75 TS
User avatar
Mats
Verde
Verde
Posts: 4059
Joined: Mon Nov 29, 2004 12:26 am
Location: Gothenburg, Sweden
Contact:

Re: 550hp+ Alfa 75 Twin Spark Turbo

Post by Mats »

GarthW wrote: Mats-How do i rotate vid around...? Have tried, and i dont see anything to do this...?
Sorry if the photos arent large enough, i didnt have my camcorder on me, only my phone. But save them and then just zoom in on them.
Maybe I was a bit unclear, post = post-production. Use some editing software to rotate it, like you would use Photoshop to rotate images.
What kind of phone do you have?
Mats Strandberg
-Scuderia Rosso- Now burned to the ground...
-onemanracing.com-
-Strandberg.photography-

GTV 2000 -77 - Died in the fire.
155 V6 Sport -96 - Sold!
User avatar
Micke
Verde
Verde
Posts: 810
Joined: Sun Dec 05, 2004 11:33 pm
Location: Finland
Contact:

Re: 550hp+ Alfa 75 Twin Spark Turbo

Post by Micke »

I know you aussies live upside down but having to edit the videos for "the upright folks" is rediculous :lol:
User avatar
jamal555
Silver
Silver
Posts: 45
Joined: Tue Jul 22, 2008 5:46 am
Location: Belgrade, Serbia
Contact:

Re: 550hp+ Alfa 75 Twin Spark Turbo

Post by jamal555 »

The distributors are what puzzles me the most...

i would think they are greatly inferior to anything modern... and on such engine that demands absolute precession in timing and spark strength...

oh well...

i guess there are no hard launches or clutch dippings with original drive train and that sort of power... not really fun :)
User avatar
Mats
Verde
Verde
Posts: 4059
Joined: Mon Nov 29, 2004 12:26 am
Location: Gothenburg, Sweden
Contact:

Re: 550hp+ Alfa 75 Twin Spark Turbo

Post by Mats »

jamal555 wrote:The distributors are what puzzles me the most...

i would think they are greatly inferior to anything modern... and on such engine that demands absolute precession in timing and spark strength...
Have you ever seen a Top Fuel engine with coilpacks or Coil On Plug?

I'm going for a dizzy setup myself, it won't have anything to do with timing though only distributing. Spark energy won't be a problem either with a MSD 6A + MSD Blaster coil. :)
Mats Strandberg
-Scuderia Rosso- Now burned to the ground...
-onemanracing.com-
-Strandberg.photography-

GTV 2000 -77 - Died in the fire.
155 V6 Sport -96 - Sold!
User avatar
jamal555
Silver
Silver
Posts: 45
Joined: Tue Jul 22, 2008 5:46 am
Location: Belgrade, Serbia
Contact:

Re: 550hp+ Alfa 75 Twin Spark Turbo

Post by jamal555 »

Top Fuel engines have very strict rules about ignition...

u forgot that electronic ignition timing is prohibited in top fuel...

if they could they would go digital...
User avatar
Mats
Verde
Verde
Posts: 4059
Joined: Mon Nov 29, 2004 12:26 am
Location: Gothenburg, Sweden
Contact:

Re: 550hp+ Alfa 75 Twin Spark Turbo

Post by Mats »

jamal555 wrote:Top Fuel engines have very strict rules about ignition...

u forgot that electronic ignition timing is prohibited in top fuel...

if they could they would go digital...
Like they do in ProMod you mean? Distributors too, but with digital control.
My point is that just because the engine has distributors doesn't mean the engine is a useless lump of s-t that would have 200Hp more if only it had coil-on-plug...
Are there really any COP-coils or coilpacks that can match a MSD amplifier + MSD coil?
Mats Strandberg
-Scuderia Rosso- Now burned to the ground...
-onemanracing.com-
-Strandberg.photography-

GTV 2000 -77 - Died in the fire.
155 V6 Sport -96 - Sold!
User avatar
GarthW
Verde
Verde
Posts: 631
Joined: Sat Mar 24, 2007 12:43 am
Location: Melbourne, Australia

Re: 550hp+ Alfa 75 Twin Spark Turbo

Post by GarthW »

Yeah Brad believe it or not, those intake runners and plenum are standard. CR is 7:8. Engine is totally worked, full forged internals, etc.

Dont have much more info i'm afraid.

Mats, phone is a Nokia 6110 :roll:
Image

Selling 1985 GTV6.

Ecu and injectors, lightened.....plays music.
BradGTV
Gold
Gold
Posts: 133
Joined: Thu Sep 24, 2009 2:55 am
Location: South Australia

Re: 550hp+ Alfa 75 Twin Spark Turbo

Post by BradGTV »

Garth - thanks for the info.
i also have a nokia 6110 and i can find a way to rotate the video on the phone. a quick google search found this :
http://www.vista-files.org/programs/dvd ... otate.html
79 GTV (sr20) 83 GTV (TS) 85 GTV, 76 GT, 84 GTV6, 91 164, 88 75 TS & 89 75 TS
User avatar
GarthW
Verde
Verde
Posts: 631
Joined: Sat Mar 24, 2007 12:43 am
Location: Melbourne, Australia

Re: 550hp+ Alfa 75 Twin Spark Turbo

Post by GarthW »

No worries Brad. I have my phone setup where it deletes the files opon loading to pc.
I've uploaded it to youtube, but ts not listed. Anyway video gives you a quick look at the car. Turn your laptops upside down... :roll:

Hey Mats, yeah the MSD is sounding pretty good, i'm still running standard dizzy lol... :oops:

http://www.youtube.com/watch?v=4NaDAPqPjfg-Remember its upside down... :(

I'll try and find out more about this car. Will keep track of it when it eventually hits the track with that new rear end in it. Hmm holinger gearbox... :P
Image

Selling 1985 GTV6.

Ecu and injectors, lightened.....plays music.
Greg Gordon
Verde
Verde
Posts: 1552
Joined: Mon Nov 29, 2004 7:06 pm

Re: 550hp+ Alfa 75 Twin Spark Turbo

Post by Greg Gordon »

Top fuelers may run distributors due to the rules. However they can break those huge tires loose at 300mph, so I don't think the distributors are holding them back anyway. Well set up distributors actually work really well, not quite as good as crank fire, but darn good.

On another note, are we sure the car in this post has that much power? If so, how long has the transaxle held up. It may very well have that, much, it's certainly possible, and it's been done before, but I haven't seen that much with a transaxle, straight cut gears or not.

Greg
Post Reply