danski0224
Well-known member
How does not having an air filter impact engine life?
It certainly looks cool, but?
It certainly looks cool, but?
How does not having an air filter impact engine life?
It certainly looks cool, but?
I've not seen filters where there are velocity stacks... not that I've seen a bunch or am any sort of expert.
I can understand it if it's a "race" engine, but if it is driven on the street, sure seems like a bad idea.
Yes happy to! ATS is a great resource and we have one of their scope kits at our workshop. Expensive bit of kit, but it pays for itself literally in a few weeks of diag, so well worth the price.
Waveform explained here
The above link is a good read. Basically we put the transducer in place of the spark plug, start the engine and let it run for about 4 seconds to capture a good waveform, then snap the throttle one time and shut it off. That gives you all the data you need. From there you can check both intake and exhaust valves, compression, cam timing, exhaust efficiency (back pressure) Intake efficiency (leaks etc) piston rings etc. Imagine the blow molded cases you would have strewn all over the place and the time involved (that you still get to charge hence why it pays for itself) to do each one of these tests.
We use this to not only diagnose engine health, but also if we have a running issue this data points us in the right direction as to what to test next. Eliminates a ton of work and guessing. I always tell the techs you don't need experience to diagnose something, you just need to know how to read data.
The above is a quick little handy chart to have on the toolbox if you do not have any known good waveforms to overlay.
I require my techs to become master's at using an oscilloscope as it is our most used tool. It just makes things so efficient and easy. Once you use one you will never grab a meter again!
A lot of times on a test drive we will have all 8 channels hooked up to the sensors we need to see when we are doing drivability. Really makes difficult diag's a breeze.
Thank you for following and asking questions! I am an open book, one of the reasons we are so good at our craft is we always want to learn and improve so we can be the best. If you don't find out what the best stuff is you can never improve!
Pfft. I can do the same thing with a finger over the spark plug hole...
Seriously, I love this.
In motorcycling I have seen way too many engines needlessly condemned or taken apart based on one poorly taken sample of the curve above using a cheap gauge. This is next level.
It’s a great tool. Have one of the older one and it will serve you well!Well I am thinking about going to look at an older Verus today. Updated to 2015 which will handle my whole fleet, comes with everything except a clamp as near as I can tell and it’s $500
From what I can tell is a newer version of the modis so it has a 4 channel scope and a scanner. Any thoughts?
That kind of car, will hardly be a dirtroaddriven daily. I see absolutely no issues with your design. I would like to say that they're rather utterly nicely executed those stacks.Interesting. My experience has actually been the exact opposite, the only stacks that I have ever seen un-filtered were the old DCOE like the Jaguar had in the 60's etc. No room for an airbox of course on those engines. Porsche also used a variant of the DCOE but those were filtered via an airbox. Even the 67R had cone filters. Granted my experience is limited to the Porsche brand and a couple other shitboxes. So I actually know very little.
You are probably right, and I am NOT an "expert" by education. Built a few hundred engines myself but my experience is limited to my own R&D (extremely limited to what my brain can understand and absorb).
That finger trick sure cracked me up....Pfft. I can do the same thing with a finger over the spark plug hole...
Seriously, I love this.
In motorcycling I have seen way too many engines needlessly condemned or taken apart based on one poorly taken sample of the curve above using a cheap gauge. This is next level.
That kind of car, will hardly be a dirtroaddriven daily. I see absolutely no issues with your design. I would like to say that they're rather utterly nicely executed those stacks.
Well I am thinking about going to look at an older Verus today. Updated to 2015 which will handle my whole fleet, comes with everything except a clamp as near as I can tell and it’s $500
From what I can tell is a newer version of the modis so it has a 4 channel scope and a scanner. Any thoughts?





Flew back in town this morning to check on things, my days got away from me this year and I only have 21 days left that I can be in the state of Illinois, got to be careful with that! Wife and I are going to drive down to FL with the dog on Saturday morning as she is out of days already.
The 930 calipers got done at paint. Wish the real color came through on a picture, this looks super orange when they are actually more of a salmon color. really ties well with the blue/grey paint and the blue/grey trim. Finished these with Casper Clear which is my favorite clear coat, rich buttery smooth finish. Love that stuff.
Wife got the fall flower arrangements for the other side of the workshop done, and we got the garland and ornaments hung on all the lifts in the workshop.
One of my guys is anti social media and hates the camera and flowers lol. He avoids it like the plague. We always give him a hard time so in our media planning meeting we decided to spin off that. Media is going to hide a camera and a mike in the planters and then my director of marketing is going to ask him to put the flowers up on the cabinets. Will make for hilarious media if he starts grumbling. Can’t wait to see the edits as it will be hilarious.
Still have to get the wreaths hung etc but it is starting to feel like Christmas at Olsen!
There is also a material that is used to make a sock or cover that goes over the traditional circular air filters I have used on dirt cars to keep dirt from caking up inside the folds of the filter. That material could possible be used to have some protection.Sprint cars used to, and may still run an oil-wetted cotton gauze filter that clamped onto each velocity stack below the flare. Not that I'm advocating using a K&N or similar "filter" (H8 them myself!), but it's maybe food for thought.
Small pic, but you get the idea:
On those the intake manifold itself has an integrated clamp to hold the stacks in place. They're crude and not well sealed, but that is fairly easy to fix if you're making the plates that the stacks are fitted to or are clamping the stacks to the ITB's.
Sprint cars used to, and may still run an oil-wetted cotton gauze filter that clamped onto each velocity stack below the flare. Not that I'm advocating using a K&N or similar "filter" (H8 them myself!), but it's maybe food for thought.
Sprint cars used to, and may still run an oil-wetted cotton gauze filter that clamped onto each velocity stack below the flare. Not that I'm advocating using a K&N or similar "filter" (H8 them myself!), but it's maybe food for thought.
Small pic, but you get the idea:
On those the intake manifold itself has an integrated clamp to hold the stacks in place. They're crude and not well sealed, but that is fairly easy to fix if you're making the plates that the stacks are fitted to or are clamping the stacks to the ITB's.
There is also a material that is used to make a sock or cover that goes over the traditional circular air filters I have used on dirt cars to keep dirt from caking up inside the folds of the filter. That material could possible be used to have some protection.
"Outerwears" is the brand name that replaced the older, more traditional use of ***** hose for that purpose.
Oil-wetted, cotton gauze filters are better than nothing, but IME, not by a heck of a lot. Note my avatar, I had grit on the inside of it's air filter. Multiple remediation projects failed to stop it from occurring. That grit was going through the filter.
With the ability to make CF parts I would be looking to make a tray and lid that enclosed a large panel dry filter and is ducted to a colder than engine bay air source. Given that this particular customer's budget didn't allow for the elimination of some rubber vacuum hoses I suspect that such a filter assembly is well beyond that budget. Perhaps in a while he'll be ready for an upgrade to protect his investment?
In the late 80's I worked on a Lola Sports 2000 (Bought new from Haas, guess who got to drive back there to pick it up?). The team manager hated the Jobroc scuff plates on the car and attempted to replace them with the same shapes cut from UHMW-PE. Those didn't last as long, by a considerable margin. Something that his ego got in the way of ever admitting to.
K&N and others have come out with airboxes for 8 stack injection setups that use one large filter element around the perimeter instead of four separate ones. I made one that used the large panel K&N element that older spec Indy cars ran on top of the airbox when they were still naturally aspirated. I agree that K&N's are not the best filter media in dusty environments, but they're a big improvement over 1/4" screen over the top of the velocity stacks which just served to keep the rocks out.



@olsenmotorsports ill nerd out: what is the coating or story on the 930 door handles? p-coat?
I gotta ask just because I dont know. How do you track your days in Florida vs Illinois? And does it get reported some where? I understand the reason why.
Also looked into the Montana vehicle registration angle. That doesn't seem as cut and dry with most states requiring registration past 30 days in a different state. And how does your insurance handle that?
That’s great! Ed is awesome you will enjoy working with him. I think you will be happy with our roof delete. It is as close to perfect as you will ever find. I am sure you have done your research on sunroof delete’s. Lots of trash out there!I didn't know this thread of awesomeness existed...I have been talking with Ed to get my 911's sunroof delete done that I have been planning for 30 years...I am sure all the other GJ'ers are tired of me whining about it![]()
Love the detail!! Great job!!


Those Aston’s are things of beauty. We have done some maintenance on them, but we turn them away for anything more (got to stay in our lane). Really spectacular cars you did a fantastic job!That class (?) of vehicle not out there to me, I've worked on similar value rare vehicles. Easily the most exotic was the Zagato 084 Double Bubble Coupe. That pic is from the Pebble Beach Concurs. No idea what this is worth now, last that a number was told to me it was around $1.1m over 5 years ago, but I think he (not the owner) might have been exaggerating some. I guess it's real worth is what someone is willing to pay the current owner for it.
The first time that I saw it all that was there was a frame leaning against the back of the building. We started from there and as we found it's mechanicals (engine in Hollister, CA, suspension corners in TX somewhere, gauges yet again somewhere else, etc.) each got rebuilt and renewed until we had a rolling chassis with a firewall and the power-train installed. Of the less than 275 sets of mechanicals ever made I have personally rebuilt 7 of the rear differentials. If you don't have a surface grinder and know how to use it, you're going to flail at that project and likely not be able to complete it.
Zagato themselves built the replacement body. Once we had it sorted out the owner shipped it over to Italy and ran it in the modern Mille Miglia. When Emilio Zagato saw it he was a bit overwhelmed as it had been his personal race car. The PS of the dash is now signed by him.
Well thanks to you I am the proud owner of a new toy.
Now to buy an amp clamp, battery and figure out how to use it!
All great insights. Here is what we have done in the past. Keep in mind we are building cars that start at $750g’s so quality and fit and finish have to be amazing.
This is a kit we did and the covers were just a rubber sleeve that grabbed around the lip of the stack. Had some nice mesh but just looks like hell for my tastes. They didn’t fit well, and just made it look like we fumbled at the five yard line. Wasn’t happy with them at all so we remade their design to something more fixed.
This one is a kit like mentioned above that uses a base plate and top plate, With a filter material on the sides. Nothing wrong with it, but Just looks too 60’s drag racer for me.
This setup is my current “Olsen Spec” filter setup that we approve and sell. Same concept as the previous, but has a billet upper and lower plate with hidden Titanium fasteners on the bottom. Uses a single K&N filter. Fit and finish meets my criteria and is something I can put my name on.
IDK maybe it is me and I am too picky. But I only want the best, and will only sell the best. I feel like fit and finish is something we do at an ok level and I am always searching every day for a way to level that up.
From a performance aspect none of these designs anyone has mentioned make any difference. It is just an appearance thing I am chasing. Gotta dial that final product in so when someone see’s it they know that is an Olsen car.
Thanks for everyone’s input I love it!
That is fantastic and congrats! One of my favorite things to do is spend other people’s money for them!
If YouTube is your thing you can learn a lot from Automotive Test Solutions (Bernie is my hero, he is so smart) South Main Auto Channel, and Royalty Auto Service. That should get the brain turning.
I’m sure anyone here can chime in as well!
Tim, just for the record, that is a Fiat Otto Vu (V8) Zagato.Those Aston’s are things of beauty. We have done some maintenance on them, but we turn them away for anything more (got to stay in our lane). Really spectacular cars you did a fantastic job!
I think Motion up in Appleton is probably the go to for them and the Ferraris now.
Love Monterey go out there every year for car week!
Spending other peoples cash, is indeed a favourite.That is fantastic and congrats! One of my favorite things to do is spend other people’s money for them!
If YouTube is your thing you can learn a lot from Automotive Test Solutions (Bernie is my hero, he is so smart) South Main Auto Channel, and Royalty Auto Service. That should get the brain turning.
I’m sure anyone here can chime in as well!
Tim, just for the record, that is a Fiat Otto Vu (V8) Zagato.![]()
Well ****. Where is the delete button????? FML
For some reason I thought all Zagato’s were Aston’s
Returning to my lane![]()
Yes. Have vacillated between a full roof replacement, and just the sunroof hole. I was planning on removing the windows and the whole cassette myself to save some money and then let some talented metal worker "work" the magic. Wish you guys were closer (I am in VA). My trusted autobody guy here in VA wants to do the whole roof delete with a new skin from Porsche. Seems a bit more invasive and I am not looking for a whole car repaint, just roof and cowl. Lots of discussion on Pelican about it.That’s great! Ed is awesome you will enjoy working with him. I think you will be happy with our roof delete. It is as close to perfect as you will ever find. I am sure you have done your research on sunroof delete’s. Lots of trash out there!
I still want a 930, not sure I'd be able to get out of it.





993 cylinder heads are back from machining. Pretty basic stuff, new valves, new seats, springs, retainers etc.





