boardkid280z

Cosworth has built all kinds of motors. I know they're not so well-known in the states, but they have a long history of performance motors in production cars as well as racing applications. Looks like a lot of the F1 motors were 3.0L (older) and 3.5L (newer) V8s. Maybe not as small as you're looking for. http://www.race-cars.com/utility/coswrthr.htm Not sure what the availability would be like on those F1 motors

summitracing sells some cheap resonators. I think I got mine for like $30 or so. That was a 3" x 18" long.

Let me know if you come up to Oklahoma and still are looking for a hood, I've got a silver one that's in good shape if you're interested. I'm in Edmond, but go down to Lawton every so often. Love the rear bumper, I too have always been jealous of the 240 bumper - where did you get yours?

AAAAAAAAAwwww, so sad to hear about the problems with this project, I was really excited about it Frank and hopefully things will go smoothly in the street car. Keep us up to date on how that goes.

MLS stands for Multi-Layer(ed)-Steel gasket, I believe. Cometic makes some, I don't know if they have em for L28s. Yea, I agree with z-ya, unless your car is all setup and running high boost, and you know it's not gonna blow up, don't run a metal head gasket. If you run a regular head gasket and something goes wrong, then the head gasket will blow instead of your piston or block.

Well, it looks good and it should do something. I like it.

I agree, it does look like it was coated once. Looks like it is kind of flaking off now.

Unless it justs rusts because it's not stainless. The downpipes we make for 944 Turbos are all stainless. Although, if you get it coated (thermal coating, jet hot, titanium, whatever) it should rust about as much as a stainless item, and the coating will help with heat dissipation in the engine bay.

That's quite a rollcage, are you entering a destruction derby or something ? j/k Anyways, if it's going to be a track car I wouldn't put anything there unless necessary to save weight. I'm sorry I don't know if you have posted before what the general purpose is going to be of this vehicle. You mention you want it to show-car-ish when done. I assume it won't be a show car then, but you do want it to look nice. Will it be a daily driver? Maybe a weekend warrior/autoX toy? Letting us know what the intent is for your car would help us give suggestions, also what are the dimensions for that volume?

Here's Youtube video of a Japanese Z with a DOHC head and ITBs. It was posted by Wstepler on zcar.com. Thought you guys might enjoy too and didn't see it posted anywhere here yet. Here's the thread he posted it in: http://www.zcar.com/forums/read/1/1898874 there are couple of funny responses in the thread. PS: Anyone know what he's pooring onto/into the motor, around 15 secs into the video? Maybe they're checking for vacuum leaks where the ITBs meet the head? Or oiling the throttle linkages?

Hey Frank, looking great! I really like the header. If I am in Belgium this summer, as I am planning to be, I will have to make plans to come up and see your projects if that's allright. We got my supercharger project running (SC only) a couple of weeks ago, only to blow a head gasket on our first night of tuning. I'm getting the head surfaced and modifying the exhaust a little and hope to have it running again in a week or so.

Thanks, but I'm trying to keep the number of polished/fancy parts on my engine to a minumum. I had a chromed mech fuel pump cover and stripped it and painted it because it was too shiny . Big Update (sorry it took so long) First some pictures. Thermostat: Engine Install This was about 3 weeks ago on Saturday. The day before, Friday I got real sick, but it was so nice out and it had been so cold that we just had to drop the motor in. Then I got even more sick and layed in bed for 6 days. The next week we installed the radiator, electric fan, fuel lines, throttle cable, oil lines (I had to buy a special fitting; metric M12 to FIC -6 or something). Friday night (Feb 8) we got the thing running. Saturday I made a Y adapter to fit the two 2" header outlets to my 3" exhaust, reinstalled my Innovate wideband, did the wiring for the fan. I was trying to get it all done so I could drive it to our local Porsche club autocross on Sunday, just to show everyone. I was up till 6:30 Friday, and didn't sleep at all Saturday night. At the end of the night, she wouldn't turn over and we replaced the starter 15 mins before we were supposed to leave Sun AM at 8:15. As it turns out I think the battery was just low. But we drove to the autocross, smokin' the whole way. It was our first drive and I thought maybe it was the int/exh gasket burning a bit, but the smoke definitely didn't go away. Didn't have a hood because the thing doesn't fit. I think I'm gonna go get one from a junkyard, cut some holes in it and paint it black. We showed up at the AutoX and a bunch of people came over to check it out, they seemed impressed . Then 10 mins later a Ford GT showed up and everyone went to go look at that . It was cold though, and I didn't want to wait around, so we left after about 45 mins. The car was completely untuned and smoked all the way. Monday night we put some thicker oil in it and it seemed to smoke less. Then we took it out and tried to tune it (Megasquirt). There was a pretty bad exhaust leak, making things from the motor really loud, so we had a hard time discerning detonation/knocking from just noise, we had the timing set below 20 across the board anywhere in boost, and slowly turned it up, I think we were around when 25 at 6psi when something happened and lots of smoke started coming out of the valve cover and crankcase breather holes. The engine also sounded weird. A compression test yielded these results, 1-6: 90-140-140-140-140-90. As it turned out, after pulling the head Wednesday, we had blown the head gasket. At least on #6 there was evidence of it. At #1 it wasn't clear if there was a place where the gasket had blown. I should have had the head surfaced, because the surface is pretty torn up. So I'll have that done next week before I put it back on with a new gasket. Also I will be welding up the connection for the exhaust and adding a pre-muffler to quiet things down so we can listen for knockage. Sorry for the long post, I will download the rest of the install pics off my camera and post them up soon. And will let you know how things go once it's all put back together. Oh before I forget, here is a short vid of it running Sunday night with the exhaust: Mr.Insane - No internal bypass on the SC, I got a pretty good deal on the used SC kit, it was missing some parts, so a lot of it has been figure it out as I go. rztmartini and jesus - The JCR Supercharger kit is not for sale new at the moment as far as I know, I talked to Sandy Cook a while ago, but the kit production was on the shelf and it sounded like they were busy with other stuff. There is another company that has the manifold molds or something, but they also are not doing anything with the project from the last time I talked to them (6 months ago or more). More pics coming soon.

Thanks for all the responses guys. It looks like my injectors are # GM5235048*RPD - GM 4095. I don't know what app they came off of... but almost 100% certain it was a 4.3L V6. Anyone have an idea what these flow? Google's not giving me anything. If they are too small, I will just have to find some bigger ones to swap into the TBI (not a problem from what I have read). OK, so what if I just plan to install the stock regulator in the return line of the GM TBI regulator, with no vacuum source (atmospheric pressure at the signal input)(I can attach a boost signal if nececessary to up the psi with boost). Will the stock Z regulator produce a constant pressure or will the TBI regulator mess it up, since it is "iffy'? If I have problems with any of this I will probably pick up one of these adjustable regulators from work and make it fit: http://www.lindseyracing.com/mm5/merchant.mvc?Screen=PROD&Store_Code=LR&Product_Code=LR-FL-51501&Category_Code=944FUELREGULATORSDDAMPERS

I will have a GM TBI on my Supercharged 78 280Z and am trying to figure out any fuel system issues I might have. Here is a thread with pics of my setup: http://forums.hybridz.org/showthread.php?t=129378 The TBI only runs at 15psi or so stock. If I just hook up the feed and return lines with no other pressure regulator, will this cause any problems with the stock fuel system, especially the pump? Basically can I lower the fuel pressure on a stock system without hurting the fuel pump? Will the fuel pump actually have more flow because it is not having to work as hard to create pressure? Anyone have any experience with this??

Not much work done tonight, stayed up too late last night, so I need to get to bed "early" tonight. Here's a couple of pics. First one is some black (lines) and dark grey (lettering) I did on the valve cover. The others are closeups of the TBI; just need to make a bracket to mount the end of the throttle cable to and attach the fuel lines somehow. I've got some stock TBI fuel lines with the fittings and about 2 ft of hard line. I think I'll bend it so it extends straight back to the firewall and use rubber hose from there to connect it to the stock hard lines. Which brings up one question, and I'll post this under fuel delivery also: If I use the pressure regulator in the TBI to run 15psi is there a problem qith using the stock fuel pump, or will the lower pressure mess up the pump. I thought lowering the pressure reduces the strain on the fuel pump allowing it to flow more fuel (lbs/hr) with no adverse effects. Anyone have any experience with this?

steveo- I might look into the lo-pro holly filter. I just got this cheap one cuz I figured smaller would be better and I didn't want to have to run out and get one when the car was ready to run. It looks kind of small now, I'm not sure I really like it. I'll see how it sits and fits in the car and go from there. I'll have to see later if there is an easy way to get cold air to the inlet, instead of filtering hot air from the engine bay. red and phantaz- I don't think clearance will be an issue. The motor sits straight up on the engine stand, and there is actually quite a slant when it sits in the car. The kit is made for a Holly TBI so I don't think there will be much difference... although I won't know till we drop the motor in this weekend. KJones' setup is different than mine, he made his own that is similar but it isn't a JCR kit. The picture below (posted by SHO-Z in the thread linked above) shows where the top of the supercharger sits behind the wheel well. It s the same kit as mine, so I think there will be enough room, as long as it fits under the hood.

Here are a few pictures of my progress this past week. My roommate and I have been working hard on getting my motor put together. It has taken a while to get all the parts together. I've really just done all the cleaning and painting this past week. I think I have all the parts to finish it... just need to get some pusher fans as the SC setup takes a lot of room on the front of the motor. The throttle body is a TBI (Throttle Body Injection) off of a GM 4.3 V6 or something like that. The Supercharger and manifold are from Jim Cook Racing's kit. The header came with a $200 2.6L motor I picked up. P90 head (only dirty part on the motor ) with flattops. And I have an aluminum radiator from JTR waiting to go in. Megasquirt is already installed... I've been using it on a turbo setup for a while, it will need a little modifying and cleaning up, but it's basically ready to go. Enjoy!

Here are a few pictures of my progress this past week. My roommate and I have been working hard on getting my motor put together. It has taken a while to get all the parts together. I've really just done all the cleaning and painting this past week. I think I have all the parts to finish it... just need to get some pusher fans as the SC setup takes a lot of room on the front of the motor. The throttle body is a TBI (Throttle Body Injection) off of a GM 4.3 V6 or something like that. The Supercharger and manifold are from Jim Cook Racing's kit. The header came with a $200 2.6L motor I picked up. P90 head (only dirty part on the motor ) with flattops. And I have an aluminum radiator from Arizona Zcar waiting to go in. Megasquirt is already installed... I've been using it on a turbo setup for a while, it will need a little modifying and cleaning up, but it's basically ready to go. Enjoy!

From what I understand, early 70-71 240s have a different front driveshaft connection, it is a 4-bolt flange instead of (or in addition to) the slip fit spline. And you can't just use an early driveshaft because the later cars have the rear diff moved back a couple inches so their driveshafts are 1-2" longer. This is my understanding as I was asking questions about this since I have a 'middle-close ratio' five speed with the 4 bolt flange. It won't fit in my 78 without who knows what...

I agree with everything olie said. Mine required too much modification and is too tight to be justifiable (1978 280Z). Next time I would just go with an aftermarket fan. That fan does blow hard though...

I don't see any way it could unbalance the engine since, technically, it's not a "harmonic balancer" or balancer of any sort, it is just a damper(or dampener/dampner ... sp?), and in itself, as long as the rubber isn't shot, should be in "perfect" balance, just like the motor which is internally balanced.

Thanks for the Informative Video, Phil. I've had a lot of trouble with mine these past few weeks starting my car in the cold, partially because I don't have an IAC or valve to give the car more air at cold start like you do. Here are the warmup enrichment settings I am at: 40deg and colder - 180% 60deg - 170% 80deg - 160% 100deg - 155% 130deg - 145% of course, my car doesn't start below 40degrees, so I have to leave it in the garage (my guess is it stays at least 45-50degrees there even when it freezes). Maybe 180 is too much at 40, I'll try lowering it and see what happens. PS: Also, my req fuel for stock turbo injectors is at 10.2 and the VE table % around idle is between 20 and 30.

I haven't heard of it being done.... but of course that doesn't mean it hasn't or can't. My roommate has an 84 Mustang SVO with that 4cyl turbo, and we bought an 87-89 Turbocoupe and yanked the motor out of it so he would have extra parts for his Mustang. We considered the possibility of that motor in a Z, and I don't see why it wouldn't be possible, with the proper mods. We also considered mocking it up in his '68 Camaro shell that's sitting in our garage and then posting pics of the mock up all over the internets just to see what people would say. He says it's a strong motor and can handle lots of power... I'd rather have an Inline 6, but whatever. Let us know what you decide/do.

Does anyone know where the picture is of the Z-car in a wind tunnel with smoke going over it? I'm looking into these VGs and wanted to see the seperation happening to decide where to put the VGs. I know I have seen a pic of a car in a wind tunnel with smoke showing seperation and what not, I thought it was here in Hybridz. I think there might have even been a close up of the roofline/hatch area, giving a real good idea of where the air streams seperate up/back there. Just can't find the pic. texis30O- Yes, with the VGs, your wing doesn't need to be as tall relative to the back of the hatch to catch a lot of air and cause a significant amount of downforce. The VGs make lower profile wings more effective, but I'm not sure how they affect tall wings (10" high and up). I would guess they would make them more effective too, but not quite as noticeably. Unless the VG's work so well that they pull the airstream real tight to the hatch/body. Then the bulk of the fast moving air might go under the tall wing, but I doubt this would be an issue, a tall wing sticking up into the air is gonna cause down force not matter what.

/agree FUNCTION >>> FORM, who cares what it looks like, put some scoops in the hood to get some cool air to those turbos.