Eric's V8 CQ

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Re: Eric's V8 CQ

Postby cuatrokoop » Sun Oct 16, 2016 8:11 am

Not going to resurrect the A4 very soon. Coolant has all drained out, guessing something froze over the winter and cracked.

In CQ-V8 news, I ordered a battery hold-down strap for it. Should be here Monday. Car also does not smell like fuel, other than the residual in the cover.
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Re: Eric's V8 CQ

Postby cuatrokoop » Mon Oct 24, 2016 9:44 pm

I don't like having to wait on a machine shop...I got the adapter brackets back, but I can't do a proper test fit because he has the rotor hats.
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Re: Eric's V8 CQ

Postby cuatrokoop » Tue Oct 25, 2016 10:22 pm

I stopped by with some pieces for work, they are still in the box on his desk :(
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Re: Eric's V8 CQ

Postby cuatrokoop » Sat Oct 29, 2016 7:27 pm

I think my 80lbf guess was correct. I test-fit the gas spring on the PT engine. I had to cut off about 1.125-1.25" from the rod end and re-thread it M6-1.0. I also tapped out the eyelet fully to make sure I had full range of adjustment in case I didn't get the length quite right. Compressed length with the belt on is right around 6.125". Uncompressed length is just a fuzz over 6.25". Belt feels properly tensioned. It is supposed to rain tomorrow, so depending on what we have going on I may swap the CQ into the garage and the 4.2-Q7 out, and pull the nose off the CQ so I can get this tensioner setup on it. Best part is, it looks a WHOLE lot more factory than the turn buckle (which had come loose on me and shredded a belt).
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Re: Eric's V8 CQ

Postby cuatrokoop » Sat Oct 29, 2016 7:59 pm

Also trying to find someone to dyno tune this thing...
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Re: Eric's V8 CQ

Postby cuatrokoop » Wed Nov 02, 2016 8:36 pm

I got the gas spring installed tonight, i was only able to take it up to 4k out of respect of my neighbors, so I'll have to road test it this week. But, the initial results are very promising.

I am also going to get the S2 bumper on, and I may end up swiss-cheesing the license plate area for more air flow to the radiator. It also seems that the fan mounting is blocking a large area. Not that the car runs hot, but I plan on autocrossing this thing next year, so more airflow across the radiator the better. Also thinking about venting the hood, but I don't want it to look all ricey.
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Re: Eric's V8 CQ

Postby cuatrokoop » Fri Nov 04, 2016 6:41 pm

Got the S2 bumper on...Also got to test out the gas spring officially. Made several pulls to 7k, no issues other than alternator whine through the speakers, so far I'm calling the 80lbf spring a success. I'd REALLY like to get the H1/H1 headlamps installed, but the width of the radiator would force me to cut them, which I'm not very excited to do. I'll have to work a solution.

The S2 bumper went on with no cutting of the bumper, unlike the DOT setup that Ben had to clearance in several places. It even covers up the oil coolers, which is great. I also managed to sneak another 1/8" or so of clearance between the radiator and engine, but I've noticed a coolant leak at one of the hose connections on the passenger side, even before moving the radiator.

Driving this thing reminds me how under-braked it is, and that the body motion is more than in the 4.2-Q7 suspension set to comfort, lol! That will be addressed, I've got the new rotors test fit on 000292 right now, and my new adapters are waiting for me at the machine shop, I'll grab them on Monday.
Attachments
20161104_182454a.jpg
nose job 2
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nose job
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Re: Eric's V8 CQ

Postby Grillage » Fri Nov 04, 2016 6:56 pm

Looks Great!

I had considered relocating the fans into pushers rather than pullers and scooting the radiator back a bit. That would let you not cut headlights.

I'm glad you found a good solution for the turnbuckle!
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Re: Eric's V8 CQ

Postby PRY4SNO » Fri Nov 04, 2016 6:57 pm

Bumper looks great! Some RS2 lights and black paint on the rad would really tie everything together nicely.
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Re: Eric's V8 CQ

Postby cuatrokoop » Fri Nov 04, 2016 11:15 pm

The H1/H1 are RS2, late S2 and late Cabrio headlamps. I have a set I bought 15+ years ago...
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Re: Eric's V8 CQ

Postby cuatrokoop » Fri Nov 04, 2016 11:16 pm

Grillage wrote:Looks Great!

I had considered relocating the fans into pushers rather than pullers and scooting the radiator back a bit. That would let you not cut headlights.

I'm glad you found a good solution for the turnbuckle!


I may swap them around, I dunno, the hoses are pretty tight as it is... But yes, I'm hoping the gas spring is the be-all, end-all solution!
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Re: Eric's V8 CQ

Postby 90quattrocoupe » Sat Nov 05, 2016 2:26 pm

If you are going to go with pushers, don't use Spal. Not enough cfm. Get a couple of A4 HVAC fans. They put out a lot of air.

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Re: Eric's V8 CQ

Postby cuatrokoop » Sat Nov 05, 2016 11:00 pm

I may try to get thinner puller fans. The fans Ben installed move enough air but clearance is tight everywhere up front (as I'm sure you are aware, Greg!). I've looked at Derale among others.
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Re: Eric's V8 CQ

Postby cuatrokoop » Sat Jan 28, 2017 8:28 pm

Update on the gas spring install; even in cold weather I have not had an issue. Including some pretty high engine rpm rips in cold weather.

Starting is still hard, I need to pull fuel or change enrichment, or something but am so unfamiliar with VEMS I'm not sure where to begin. Unless I get the throttle position just right, I am greeted with a giant cloud of fuel stink smoke. Warm or cold ambient temps, warm or cold engine, doesn't matter. Starting is a problem. I did manage to help it out with a Group 90-something battery which has something like 1000CCA.

I'm also looking at offset upper strut mounts to gain more caster, which would be good for suspension geometry and autocrossing. I am fairly certain I will be ordering them from a site in Poland, I've talked with the company owner a little bit, looks like delivery will only take a little over a week. Price seems fair as well. Only thing I need an answer on, is if I can run the B4 strut tower brace brackets (the weld-on pieces) with his USM's. I have brand new, never installed brackets and the square tube sitting, but I can't tell if they'd fit together.

So, I'm waiting on warmer weather to do more work, since my garage is not fully insulated and I don't have the heater installed yet...
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Re: Eric's V8 CQ

Postby cuatrokoop » Sat Jan 28, 2017 10:34 pm

Also, I think I'm going to cut out most of the area in the S2 bumper license plate recess, and add in some black painted mesh to allow more air to hit the radiator.
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Re: Eric's V8 CQ

Postby Grillage » Sun Jan 29, 2017 12:56 pm

Glad to hear you conquered the alternator belt!

Are you having overheating issues with the new bumper or are you just making sure you don't?
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Re: Eric's V8 CQ

Postby cuatrokoop » Sun Jan 29, 2017 4:52 pm

No, no over-heating issues, however I haven't run it really hard in the summer. I just don't want to have an issue during an auto-x in the paddock area (also why I need to fix the starting issues, since it sits for a bit shut down then you have to hurry-up and get moving now!). I'll trailer it to/fro, so I won't have the added heat from driving it to events on hot days. I think I am also going to space the back of the hood to allow air to escape the engine bay easier with out having to cut the hood for vents.

Yes, I really think the gas spring is the ticket to these things when not using the full factory tensioner. I do think that this, with the fans and PS pump, needs a larger alternator (or maybe the VREG replaced, which I have one somewhere in my stash).
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Re: Eric's V8 CQ

Postby AudiSport4000 » Sun Jan 29, 2017 10:41 pm

Gimme a shout when it gets warmer out. I'd love to see this thing and help ya wrench.
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Re: Eric's V8 CQ

Postby cuatrokoop » Mon Jan 30, 2017 6:33 am

Will do, Mike!
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Re: Eric's V8 CQ

Postby 90quattrocoupe » Tue Jan 31, 2017 8:42 pm

Instead of cutting out the license plate area for more air flow to the radiator, try making a sheet metal scoop to direct air from the lower center grill up toward the radiator. This way the air does not just pass underneath the radiator . You can also fabricate some type of seal between the hood and top of the radiator. This will prevent air flow from going over the top of the radiator.

I built ducting so that all the air coming in from the hood grill and lower grill, is forced through the radiator. I installed ducting on both sides of the radiator also.

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Re: Eric's V8 CQ

Postby cuatrokoop » Mon Feb 06, 2017 11:04 pm

Greg, I'm sure I've seen photos in the past, but how do you help get the air out of the engine bay? Not sure I want to add a bunch of ducting, as I like being able to actually access the FEAD

Also, I have a set of brand spankin' new castor increasing upper strut mounts sitting, waiting for this Ohio winter to decide if it is winter, or spring. They'll go in along with the reassembled struts with new spring rates (and new springs, since T.C. didn't know how to assemble a suspension properly from the looks of it). I contemplated running offset subframe bushings as well, but for one they are aluminum, and two I didn't know if there was enough slot length in the transmission mounts to make up the difference. Depending on how the wheel sits in the arch, I may have to run them and just deal with the added harshness (they aren't that expensive). May also just go all in and swap to more track oriented engine and transmission mounts at that point. We'll see.
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Re: Eric's V8 CQ

Postby 90quattrocoupe » Tue Feb 07, 2017 7:22 pm

Not really any pictures of my current setup, as far as the radiator goes. Didn't think about pictures, when deciding how I wanted to go and was pressed for time before a track event.

I originally had 034 do my engine installation, because I haven't done any welding in 50 years and I was going with 034 IIC for control. I don't do electronics very well. The original radiator they installed, was not adequate for the job. So I had a copper/brass end tank radiator made to the dimensions of the B4 radiator. I had them peel the top mount strip piece off the top of a B4 radiator and install the lower mounts from the B4 radiator to the one they made of me. This way I would have a radiator that mounted in the stock location. By using the top mounting piece from the B4 radiator, I was able to use the top seal for between the hood and the radiator.

My radiator has the return water from the heads, going to a driver's side inlet at the top of the radiator. A lower side outlet feeds the water intake at the thermostat housing. Even though the original B4 radiator is a single row radiator, they fitted a dual core in mine, with about the same depth as the top mount from the B4 radiator. My radiator is a triple pass so it goes from the inlet on the driver's side to the passenger side, then back to driver's side and back to passenger side outlet.

I am using a Spal fan behind the radiator on the driver's side and two A4 AC fans in front. The A4 AC fan on the passenger side and the Spal fan come on a about 90 degrees C, and the driver's side AC fan is controlled from the AC switch on the climate control. One thing you have to watch out for with Spal fans, is they like to give the velocity in CCMs instead of CFMs. Cubic centimeters per minute are lower than cubic feet per minute, so the number sounds high in CCMs but comes out about 3/5ths the number in CFMS.

My setup has been tested at the track and in 95+ degree weather in bumper to bumper traffic and no overheating. My biggest problem is at night. I can be cruising down the freeway and I get too much cooling. I have a tendency to go through thermostats. At night the water temp will come up the thermostat will open, the cooler water will flow and within a couple of minutes the thermostat closes again, because the motor cools off to below the thermostat temp. At the times when my thermostat is broken and wide open, when cruising on the freeway, the temp will not even reach the first dot on the gauge. It runs too cold.

I don't think vents in the hood will do you a lot of good, unless you have something like on a Lancer EVO , with the hood vent right behind the radiator. The problem with the radiator right in front of the V8, is the flat wall the air hits after it goes through the radiator. I call it bounce back. The faster you go the more air flow bounce back. The hood vent just behind the radiator will create a low pressure area behind the vent, because of the air flow over the hood, so it might help. One of the problems with, a vent in the hood, just behind the radiator, is the radiator hoses. They will be blocking any air flow upward. The Naca ducts in the B4 belly pan create a low pressure area for air flow under the engine. They will help under the hood air also. The engine is a V8 so there will be more air flow at the lower portions of the motor vs the wider upper part of the motor. Not only that, but with the air box on the passenger side and the stuff on the driver's side, rear or side hood vents are I personally, don't think, are going to help a lot. Are you running a belly pan? B4 is better than the B3/coupe ones.

I will be doing my thermostat in the next month, so I can get more pictures, but here is a couple showing my ducting and front fans. In the first picture you can see the how the radiator is mounted using the original B4 mounts and the hood seal.

Image

In this picture, you can see the fans and the ducting on the sides for the radiator.

Image

Hard to see, but here you can see the lower duct directing air to the radiator. It is white behind the grill. The black running across the white is wiring for the passenger side headlights, turns, etc. The side duct guides extend all the way down to this lower duct scoop.

Image

Click on the pictures, they will get larger.
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Re: Eric's V8 CQ

Postby cuatrokoop » Sat Feb 11, 2017 12:26 am

Thank you for all of that, Greg, greatly appreciated. I do not have a belly pan, I couldn't get one to fit with the S2 bumper on my old CQ, at least not well. I did find on my old C5-A6q that the belly pan really helped oil temps. Maybe when I get all the rest of the stuff taken care of I'll fab up an aluminum pan at work (there is an iron worker and a 4ft wide hand break, plus several TIG and wire welders set up for aluminum).
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Re: Eric's V8 CQ

Postby Grillage » Sat Feb 11, 2017 7:17 am

Eric, I think I have a spare belly pan here. Although it likely won't fit around the oil cooler
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Re: Eric's V8 CQ

Postby cuatrokoop » Sun Feb 12, 2017 11:37 pm

Hey Ben, thanks, but I'm not sure how Greg got his belly pan to fit, unless that bumper is some sort of hybrid. It looks like S2/euro-B4V6 lighting and the chin, but the grilles look taller and no license plate area like on a genuine Euro bumper like the one I have. The trailing edge where the belly pan would sit is vastly different than both of the US B3 and B4 belly pans I've tried so I either need to source an S2 or make something. I can cut/plas/bend/break/drill/punch/weld at work...
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