3.9 RSR project --- my Carrera reborn - Page 3

911teo · 02-20-2006, 10:05 AM

Quote:

Originally posted by herman maire

I am surprised though that they could not fix youre shell, since the dammage does not look bad at all. When you consider some wrecked cars that get repaired
and repaired well at that. I Just hope the mechanic is not being a wuss by not fixing the shell and costing you more $$$. Second opinion would be a good idea but it looks like youre pretty committed your mechanic.

To be honest with you it could have been fixed but...
It would have meant spending more time on the frame (more $$$). Plus the 74 was a non sunroof tub. So getting the sunroof out of my 88 was a wash with the mods needed on the 74 to fit the G50.

Plus starting with a bare tub makes the repaint process easier and nicer... It will be Mexico blue...

911teo · 02-20-2006, 10:06 AM

Quote:

Originally posted by Bill Verburg
I know where you might get a G50/31, got a spare $6k?

Bill PM me... I might be interested.

911teo · 02-20-2006, 10:10 AM

Quote:

Originally posted by silverc4s
Fantastically interesting project. Thanks for sharing with us here.

Question - I don't recall seeing such heavy crosshatching on cylinder bores before. Is that really that coarse, or is it a photo anomaly??? Thanks again...

I do think it's the lighting and the camera's flash hitting the inside of the cyls. If you check some of them look smooth whilst other more coarse...
Having said that I will ask Steve Timmins... He's been great thoughout this all project.... I am sure he won't mind elaborate on it...

Porschekid962 · Porschekid962's Garage

Awesome stuff! I am just aching to get started with my build now, waiting for parts to show up and we are going with the Jenvey as well, gosh they look nice.

On your efi I believe your using a motec box but are you going to also go crankreferenced and coil on plug by chance?

herman maire · 02-20-2006, 10:32 AM

Matteo- If youre still looking for a G50 5speed or 6 speed
check youre PM.

bigchillcar · bigchillcar's Garage

lol..after it's built, don't add up the receipts..hide them away, especially from the wife.

wy wallet shuddered all the way from arkansas..lol.
ryan

Porsche Doc · Porsche Doc's Garage

Hey Man!
Very NICE

I think I'll go crash my Porsche, So I can do this to my car.

How bad did you say to your insurance man your neck hurt?

I am looking foward to seeing the chassis dyno numbers on this one.
What is your guess Man?

911teo · 02-20-2006, 07:15 PM

Don
about the dyno numbers... I don't know...

Put it this way... a while back there was a thread on the engine forum about a 3.6 with carbs and EFI.

It was putting down 291 rwhp. Assuming 15% loss it's 343HP at the flywheels. Extrapolating to 3.9L it gives 371HP.

My cams are a little more aggressive, I have bigger valves, bigger TBs, ported heads...

I don't know... but suddenly GT3 power does not seem so silly anymore

Whatever it is if we hit the 2.300 lbs I will be in the 6lb per HP area...

Porsche Doc · Porsche Doc's Garage

Quote:

Originally posted by 911teo
My cams are a little more aggressive, I have bigger valves, bigger TBs, ported heads...

I don't know... but suddenly GT3 power does not seem so silly anymore

Whatever it is if we hit the 2.300 lbs I will be in the 6lb per HP area...

Yea, Bigger is always Better!

I see using your using Johns dc22's it ought to breath good with those.
Whats the CR of those JE's 12.5 ish?

It won't surprise me to see 400 rwhp and a bunch of torque.

I see a G50/50 or something in your further Too!

It looks great Man!

Jeff Alton · 02-20-2006, 08:49 PM

This is one kick A$$ combo!! I too am intersted in what it will make. That is going to be one unbeivalble car when you are done!! Ask John what he thinks the power is going to be. I nearly fell of my chair when he told me last week what guys were making with the cams I ordered with only a 3.4!

I think you will see at least 400 at the flywheel with snappy thottle response. You will have a dream motor, tons of power and torque, pku the great throttle response ( from the itb's) that some of the early MFI motors had. The best of both worlds.

It will be the motor the rest of us talk about and dream about.

Cheers

bigchillcar · bigchillcar's Garage

so, too, the idea is it will be a high revving motor? with all the beautiful sounds that go along with that? you ought to hang earplugs from the rearview mirror, just to make a point..lol

ryan

Joeaksa · 02-21-2006, 02:42 AM

Are you interested in adopting anyone? I can grovel for rides in this puppy!

Joe A

Jims5543 · 02-21-2006, 05:01 AM

Awesome project!! I also want to say "Damn you!!" I have been perfectly happy with my 3.6 swapped Targa. I have, in the back of my mind, toyed with adding a Motec to the mix just to simplify the ignition system. I am not too happy with the dual distributors and would prefer a couple of banks of coil packs instead.

Your project is amazing, and potentially getting 400 to the wheels from a naturally aspirated engine is too good for words.

What model Motec are you using? I have an M-4 in my RX-7 and love it. You are probably dealing with Jay at Motec right? He is a great guy.

Good luck with your project. Keep up updated. This is awesome.

911teo · 06:03 AM

I have a Motec M600 unit.

The options installed are the extra 512k of memory, the single Wide band Lambda controller.

The tricky thing about Motec (and I guess all the other EFI systems) is that it's not over with the ECU... You need to add some more $$$ for the harness and dyno tuning and in car tuning...

Steve Timmins and Paul Schwartz (@ Cyntex - Motec authorized dealer) will tune the engine. I have been dealing mostly with them.
I bought the ECU from a fellow Pelican that decided to go a different route on his project.

As per the 400 HP to the wheels.... I guess you guys are getting over excited.. That would be around 470HP at the flywheel... or 120hp/litre.
I don't think so...
The 3.8 (really a 3,749cc) in RSR form from Motorsports was good for 450hp at the flywheel... And it was not a streetable engine...

No, I think I will be happy with 380-390hp at the flywheel. 100hp/litre on a street 2-valve aircooled engine will be an incredible result.

Anything above that will be icing on the cake.

To be honest max HP was never one of the priorities. I wanted a rev happy engine with instant throttle response.

With the money I am spending I could have twin turboed the 3.6 and easily obtained 650hp with the Motec... But I'll leave that for another day!

Jims5543 · 02-21-2006, 05:57 AM

The initial cost of the Motec unit is the tip of the iceberg. I think I spent the cost over the unit once over in add ons for my RX-7 and it is a very simply 2 cylinder setup. The lambda is a most do and VERY valuable when street tuning. I still use mine from time to time just to see how everything is doing.

It sounds liek you are in good hands. I had to fly a guy in from Texas to tune my car properly. I was lucky enough to get a base map from a guy in Merrietta Ga who owns a Mazda shop and had been tuned by the same Texas tuner.

But, tuning is 1/2 the fun of it. Especially once you unstrap it off the dyno and get it on the street and get into it.

I love the route you are going and will enjoy watching your project as it progresses.

timmins · timmins's Garage

FWIW I am building a similar motor for my car. I am goign nearly the same route but will be using larger TMW stacks (which I happened to trip over, darn) and some DC100 cams, again from Dougerty. The consensus is that it won't idle all that well, and most of the eggs will get broken on the way back from the grocery store, but it should be pretty happy above 6K. I'm using DTA management mainlky because I happened to have a setup sitting around.

Steve

911teo · 02-26-2006, 12:12 PM

Little update...

The 935 ERP suspension kit parts have arrived...

Aaron and Keith at Zuffenhaus will work this coming week onto the 74 tub. On the agenda are:

- Smart Racing front suspension towers
- SM front camber plates
- front strut towers reinforcement (triangle bars welded between the towers)
- rear shock towers reinforcemet
- Rear "S" flares removal and installation of my "old" early style flares
- tunnel modification for the G50/31 transmission.

Yeah I decided that I may as well go for it... So the G50/31 is coming new from Germany...

Here are the 2 tubs one beside the other at Zuffenhaus

Work should go smooth... especially after the team has acquired 2 new eager helpers!

asphaltgambler · 02-26-2006, 12:24 PM

All I know is that stuff could be set on the mantle and admired for years..........like fine collectables!!

RideShoot&Drink · 02-26-2006, 01:03 PM

Wooohooo!!!! Congrats on great project Matteo! Therefore, I have a question for you: what needs to be done to fit 6sp G50 into 74 tub? I keep thinking about similar upgrade on my car. So, any details that you could provide on that conversion would be greatly appreciated!

911teo · 02-26-2006, 01:14 PM

Keith and Aaron at Zuffenhaus are the expert. I know th G50 is longer and wider. U need to modify th eTbar housing and modify the tunnel.

I'll ask them to chime in for more precise infos...