Sorry if I'm in the wrong forum, let me know if so.
I'm thinking about buying a 67 bug. I'm in the inland empire, Southern California. I am familiar with VW's but I've been out of it for about 30 years. The car has been sitting eight plus years with approximately 300 miles on motor. Owner said it needs dyno tune.
I know zero about a turbo motor as well as a motor of this size. I have a few questions.
1. Dyno tune - What all is involved, approximate cost to have it done, where to have it done in the 909 area code? Anything to lookout for?
2. With a motor like this, would it be more for the drag strip only or could it also be ran on the street as well?
3. Any problems with excessive heat and/or dependability?
Any advice or information will be greatly appreciated Thank you for your time.
Motor specs are below
Turbo motor - draw through
Scat flanged 90 MM crankshaft
Scat H beam 5.7 long rods
Cima Mahle pistons 94 MM total seal rings
Web turbo camshaft
Ported heads 40 x 44 big valve
Autocraft 10 MM head studs, Scat 1.25 rockers
Swing Axle trans double gusseted 3.88 R&P
FI, big cc motor & dyno tune Q's
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madmike
- Posts: 3146
- Joined: Mon Jul 24, 2006 3:11 pm
Re: FI, big cc motor & dyno tune Q's
we luv pic's 
what's the cooling system like? compression ratio?
what's the cooling system like? compression ratio?-
petew
- Posts: 3928
- Joined: Sat Oct 07, 2006 4:05 pm
Re: FI, big cc motor & dyno tune Q's
Anything that old, is gonna need a tune anyway. But yeah, pics = win.
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slowsixtyduece
- Posts: 676
- Joined: Thu Sep 05, 2002 12:01 am
Re: FI, big cc motor & dyno tune Q's
Welcome back to the VW scene! To answer some of your questions.
1. Dyno Tune. First of all, does it have a wideband O2 meter? This will be most helpful before you even make your way to the dyno shop. Two dyno type choices: a. rolling road dyno, where your cars back wheels are on a set of large rollers and the car is strapped to the floor. b. Flywheel dyno, where your engine is out of the car and mounted/bolted to a dyno. Both are valuable ways to test and tune an engine before it sees street/drag time but you will need to know which way you want to go before searching for a dyno in the 909. If rolling road (engine in the car), VW Paradise has one and they are a VW specific shop, able to really dial in tuning quickly.
2. Street/ Strip The motor is quite big, but alot will depend on camshaft specs. Does the current owner have these? You would be looking for a cam card or any specs on full/adv duration, duration @.050" and lift. All of these will be somewhat telling of how high strung it is. Other factors will be intake runner sized/diameter, exhaust size, head porting and state of tune. Sounds like its more of a drag motor but ya really dont know until you tune and drive it!
3. Excessive Heat/Durability Excessive heat will depend, as previous comments have stated, on your cooling system in place and the state of the cars body around the engine bay. Does it have all stock tin, stock oil cooler and so on? Or is it pieced together with aftermarket tin and a single remote oil cooler? Is the engine compartment cut up, allowing hot engine air into the upper compartment? Best way to keep a STREET motor cool would be all stock Original German tin with appropriate rubber seals (etc), or a Porsche shroud along with as much deflection of heat from under the car as possible. Durability will depend on the attention to detail paid when building the engine, rotating assembly balance, maintenance (future and past) and how its driven as well as state of tune. You can blow up a perfectly built motor in 2 seconds if you are detonating/ running lean under boost (thus the necessity for a wideband and dyno tune as we have been discussing).
Sounds like it could be a neat and FAST car to own. Is the owner willing to let you do what it takes to fire it up and take it for a short spin? Or is it going to need to be trailered home to do so? If it were me, unless it was a smoking deal, I would want to make sure the motor runs before ever handing him some $$. You never know, he could have blown a hole in a piston, even within 300 miles, and parked the car after losing interest.
1. Dyno Tune. First of all, does it have a wideband O2 meter? This will be most helpful before you even make your way to the dyno shop. Two dyno type choices: a. rolling road dyno, where your cars back wheels are on a set of large rollers and the car is strapped to the floor. b. Flywheel dyno, where your engine is out of the car and mounted/bolted to a dyno. Both are valuable ways to test and tune an engine before it sees street/drag time but you will need to know which way you want to go before searching for a dyno in the 909. If rolling road (engine in the car), VW Paradise has one and they are a VW specific shop, able to really dial in tuning quickly.
2. Street/ Strip The motor is quite big, but alot will depend on camshaft specs. Does the current owner have these? You would be looking for a cam card or any specs on full/adv duration, duration @.050" and lift. All of these will be somewhat telling of how high strung it is. Other factors will be intake runner sized/diameter, exhaust size, head porting and state of tune. Sounds like its more of a drag motor but ya really dont know until you tune and drive it!
3. Excessive Heat/Durability Excessive heat will depend, as previous comments have stated, on your cooling system in place and the state of the cars body around the engine bay. Does it have all stock tin, stock oil cooler and so on? Or is it pieced together with aftermarket tin and a single remote oil cooler? Is the engine compartment cut up, allowing hot engine air into the upper compartment? Best way to keep a STREET motor cool would be all stock Original German tin with appropriate rubber seals (etc), or a Porsche shroud along with as much deflection of heat from under the car as possible. Durability will depend on the attention to detail paid when building the engine, rotating assembly balance, maintenance (future and past) and how its driven as well as state of tune. You can blow up a perfectly built motor in 2 seconds if you are detonating/ running lean under boost (thus the necessity for a wideband and dyno tune as we have been discussing).
Sounds like it could be a neat and FAST car to own. Is the owner willing to let you do what it takes to fire it up and take it for a short spin? Or is it going to need to be trailered home to do so? If it were me, unless it was a smoking deal, I would want to make sure the motor runs before ever handing him some $$. You never know, he could have blown a hole in a piston, even within 300 miles, and parked the car after losing interest.