Hi All,
After a 6 month rebuild my Beninca powered GTV is now ready for a run!
Always wanted to try the blow through carbs and it all appears to work, at least on the dyno.
Will try to get to Lakeside practice on the 7th of June to run the engine in.
Some You Tube Vids
http://www.youtube.com/watch?v=weTNvQGzxeQ
http://www.youtube.com/watch?v=TB7ZkVfO6DI
Cheers
George
Nice one George. I can't wait to see it on the track. 235hp at the wheels! Plenty of torque too I'd imagine.
Make sure you enter the Festival Of Italian Motorsport at Lakeside on September 8. There'll be at least 40 Italians competing in racing and regularity that day. Should be a ripper.
Catch you soon,
Brent
Cheers, thanks Brent, might give the regularity a go. Just don't want to destroy this engine, saving it for hill climbs and sprints.
7th june hey-might have to do the secret squirrel spy move-awesome job--look out for them 3lt v6 and twinny in your mirror
Quote from: 17fitty on May 31, 2013, 09:05:13 AM
7th june hey-might have to do the secret squirrel spy move-awesome job--look out for them 3lt v6 and twinny in your mirror
Might have some HP now but still don't know how to drive so am expecting 3L v6's and twinnies to put me to shame still :)
HAHA doubt it george-maybe an alfetta sedan on the track soonish ?or maybe a driver?
How was lakeside today?Perfect whether for a practice.
Great day for practice, cool, very few cars on track. Lasted 4 laps before cylinder 1 became a water pump, oh well back to the drawing board. Should have o- ringed my liners I guess!
ouch!
Ok so it looks like detonation that may have led to head gasket fire ring failure on #1 cyl which then lead to water ingress and then cracked liner.
So it looks like the 123 Tune ignition advance and boost retard curves worked ok on the dyno but not so good under the load/heat of a couple of laps of lakeside.
I'll replace the liner, adjust the ignition curves and run Avgas, hope this gets me through 6 runs at Noosa!
Bad luck George. At least you're having a red hot go! Best of luck with the repairs for Noosa.
Cheers,
Brent
Hey George.
As you know my 90 is awaiting if you need a car for the hill.....yep seriously,cant have that neighbour winning,,,,,,,,,,,,,,I would if i could
Head is going back on this afternoon - Scuderia Yandina Creek style, got a unique way of removing/replacing the head/carbs/header and turbo all in one piece, does involve a 7 ton excavator though, will post some pics :)
New liner, some av-gas, less total timing and I'll be ready for last place in my class but boy will it sound good!
Why hurt your back!
Yep thats an engine crane-no chance of back issues with that!!!Let me know if i can help.
As a matter of interest regarding the head gasket failure. Is that a standard Alfa gasket you are using and how much boost is involved?
Quote from: MD on June 21, 2013, 07:47:59 AM
As a matter of interest regarding the head gasket failure. Is that a standard Alfa gasket you are using and how much boost is involved?
Standard Reinz gasket, no o-rings, 9 psi non intercooled. Saw the same kind of gasket damage when I had a faulty stock Bosch distributor and high compression shaved head.
I've backed off on advance by 5 deg and run 1:1 boost/psi retard.
Got some bp100 leaded race fuel today as well to help. The bp100 is just returned avgas that is out of date/spec for aviation use.
Funny thing is the fire ring on Reinz I just put in is wider than the three that I have used over the last few years. The part number is the same so maybe it's a production issue. I could tell the difference as the fire rings on the head side of the gasket were almost touching but on my other Reinz gaskets there was a distinct gap.
Did you re-tension the head after the initial engine running in period? How can you be sure it was detonation?
Quote from: MD on June 21, 2013, 06:40:52 PM
Did you re-tension the head after the initial engine running in period? How can you be sure it was detonation?
Yes retentioned as per Spurrel specs. Fire rings were dimpled and had others more experienced than I tell me it was detonation. All 4 cylinders showed fire ring deformation, 1 & 2 were the worst. It's like the fire ring is compressed and you can see a sharp edge in places. The last time I saw it on a reinze was when I lost a stock piston ring land on #2 on a hi comp na Nord.
Righto then ready for the Noosa Hillclimb, had to increase the jets from 165 to 175 which then gave me 11.5-12 :1 air/fuel on boost full load 3rd and 4th gear.
Head is now torqued to 110nm with standard reinz gasket, timing has been backed off by 5 deg with a total of 25 btdc with +1psi = -1deg boost retard.
Avgas seems to work well, no hesitation, idles well, starts well.
Will report on how things go, fingers crossed it makes it through the weekend.
QuoteHead is now torqued to 110nm
I hope your studs don't stretch..
Best of luck with it.
Quote from: MD on June 23, 2013, 07:46:53 PM
QuoteHead is now torqued to 110nm
I hope your studs don't stretch..
Best of luck with it.
Hopefully my pain may be someone else's gain, Sharing this information and being honest about the steps taken may help someone who is looking at going down the same path.
May not be that many people though as I have already had my sanity questioned several times re trying to turbo blow through carbs.
We appreciate you sharing it George. Plenty of us harbour the secret desire to run a turbo engine but few of us have the commitment to make it happen.
Cheers mate,
Brent
Quote from: hammer on June 24, 2013, 06:32:58 PM
We appreciate you sharing it George. Plenty of us harbour the secret desire to run a turbo engine but few of us have the commitment to make it happen.
Cheers mate,
Brent
Thanks Brent,
Need my head read, I rebuilt a 3 litre v6 for a mate and it hauls, the performance between the v6 and the turbo weren't too far apart, the v6 lasted all day, I made a lousy 3 laps.
Keep up the boost George-awesome youve done it.Neighbours say it sounds fantastic.See you on the weekend
Well it's 6am and the outlook is not good, looks like a couple of wet runs today at the hill. With roughly double the hp of last year plus a wet track, mmmmmm, hope we're not in the shed tonight fixing panels and suspension!
Results
Over 2000cc Sports Cars
1st Nissan 180 sx
2nd Alfa Gtv 3.0
3rd Alfa Gtv 2 turbo
4th Lamborghini Gallardo
Very happy with the weekend, both cars performed well, the turbo held together, smiles all round.
Thanks to the Noosa Classic and MG car clubs for another great event!
Well done George. So glad it all came together for you.
Now you and your mate need to lock in September 8 for the Festival Of Italian Motorsport at Lakeside, to come racing with us. Don't worry mate, the gods of Lakeside haven't put a curse on you - although they do like messing with your engines.
Cheers,
Brent
I'd say my mate will be there in the V6, next event for me is Leyburn in August and then Noosa again in November.
In the mean time I've got to finish my sons GTV6. Never thought I'd say I'm a bit tired of working on Alfas.
After rebuilding the turbo and the 3L V6 and then the turbo again I'd just like to enjoy driving them not getting under them!
There's some trackside video from The Hill (George does make a couple of appearances - interesting line off the start, but not as amusing as the V6...) here: http://youtu.be/gcfJQC2r2b4?t=3m3s. Nice cold damp air for the turbo...
Quote from: Darryl on July 22, 2013, 08:32:41 PM
There's some trackside video from The Hill (George does make a couple of appearances - interesting line off the start, but not as amusing as the V6...) here: http://youtu.be/gcfJQC2r2b4?t=3m3s. Nice cold damp air for the turbo...
Nice find Darryl, yes Warren had fun, was only one dry run so the rest of the wet runs were a bit sideways. I tried to roll the turbo off the line but it came on boost and the result was two wheels in the mud.
Had a heap of fun, times were crap but the turbo and v6 went well.
Off to Leyburn soon with 4 alfetta gtvs from Yandina Creek. My son at 14 is hoping to have his 1st run in a Gtv6 2.5.
Last run for the v6 required a front spoiler patchup.
http://m.youtube.com/watch?feature=plcp&v=0a7nT4K3zoI