garvice Posted February 24, 2011 Share Posted February 24, 2011 (edited) Looking good Ron. I can definitely understand your reluctance in not wanting to move the transmission mount (since you have the later style mount). I just had to do it for my 300zx transmission in my 260z and while it wasn't overly hard, it did require a lot of patience and will not be a reversable change (not that I will ever go back) without a lot of work. The 240z mount would make it so much easier as it would just require a different crossmember. Edited February 24, 2011 by garvice Quote Link to comment Share on other sites More sharing options...
EF Ian Posted March 2, 2011 Share Posted March 2, 2011 Great Work so far BMW Make great engines, I plan to use their S85 5L V10 in a future project Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted March 17, 2011 Author Administrators Share Posted March 17, 2011 I decided to abandon the surge tank, and go with an in-tank pump/sump. Part 1: Bosch 044 pump, -8 filter sock, and check valve with -6 outlet. Return is also -6... Quote Link to comment Share on other sites More sharing options...
Neverdone Posted March 17, 2011 Share Posted March 17, 2011 That looks SO COOL! I question, and don't take this as a, "I think I know more than you" style question, because I don't, but, don't ya think you may have over baffled it? I mean, there's no way fuel is gonna leave that thing under acceleration or turning...but won't it have a bit of trouble getting back into it? Or do you have that baffle box sitting lower than everything else? Or am I just getting way too caught up in what might happen with crazy low fuel levels? Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted March 17, 2011 Author Administrators Share Posted March 17, 2011 don't ya think you may have over baffled it? I mean, there's no way fuel is gonna leave that thing under acceleration or turning...but won't it have a bit of trouble getting back into it? I don't *think* so. Can't prove it yet though As far as fuel entry, I'm way over sized compared to many OEM's. Take a look at the single small inlet in this BWM E36 sump (it's only about 1/2" tall)... If you start tearing apart factory cars, you'll see this is pretty common. One car I discovered that uses a similar principle is a Honda S2000... It's proportionally different, but it still makes use of the same method of trapping... four "C" shapes, aligned 90 degrees to each other, with a (nearly) full height corner inlet. Or do you have that baffle box sitting lower than everything else? Or am I just getting way too caught up in what might happen with crazy low fuel levels? It is at the bottom of the tank, flush with the floor. As far as "crazy low fuel", about the only way to run reliably with truly low fuel levels is by incorporating a surge tank or swirl pot. I just didn't want the complexity of two pumps and their plumbing. If I achieve modern OEM function and simplicity, I'll be happy. Quote Link to comment Share on other sites More sharing options...
Gollum Posted March 18, 2011 Share Posted March 18, 2011 Yea... That'll work. Keep the posts coming! Quote Link to comment Share on other sites More sharing options...
garvice Posted March 19, 2011 Share Posted March 19, 2011 Is the pump sitting on the bottom of the sump and the springs holding it upright? Does this stop the fuel from entering the pump, or do they suck from the sides of the pump, through the bag? Do the springs offer any benefit over building the sump a little taller and bolting the pump to the sump? - Perhaps noise transmission from pump to tank to outside? or - Less vibration on the pump bearings? Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted March 19, 2011 Author Administrators Share Posted March 19, 2011 Is the pump sitting on the bottom of the sump and the springs holding it upright? Does this stop the fuel from entering the pump, or do they suck from the sides of the pump, through the bag? The filter is roughly 3/8" tall. It has framework inside to keep from collapsing. The springs are holding the pump down against the framework (of the filter). Do the springs offer any benefit over building the sump a little taller and bolting the pump to the sump? - Perhaps noise transmission from pump to tank to outside? or - Less vibration on the pump bearings? The purpose of the spring mounting is to reduce contact area in effort to reduce noise. I could have machined a clamp on bracket with a Viton isolator, but I'm hoping this is a little quieter. I've got a 50/50 chance.... either it is or it isn't Quote Link to comment Share on other sites More sharing options...
Drax240z Posted March 19, 2011 Share Posted March 19, 2011 I've got a 50/50 chance.... either it is or it isn't LOL... nice. Interesting concept though, please post some feedback on fuel pump noise once you are done. It probably would have been easier to just keep the BMW Ron! Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted March 19, 2011 Author Administrators Share Posted March 19, 2011 Part 2: 2000 Vette fuel filter w/built-in fuel pressure regulator (runs @ 4 bar), and -6 adapters. Plumbed in... I'll probably add a heat shield below the filter. Interesting concept though, please post some feedback on fuel pump noise once you are done. It's a lot quieter than my last triple isolated Walbro (rubber+rubber+low durometer plastic). I'd say it's about 25% louder than a stock Datsun EFI pump. At idle, you can't hear it from inside the car. From the outside, you can hear it while standing next to it, but not 8' away. With the engine off, pump on, the tank has a bit of a ring to it. Rubber isolation would probably have taken care of that. It probably would have been easier to just keep the BMW Ron! I still have my M3 to play with when the Z isn't demanding my attention. It's a fun car. Sometimes I wonder while I'm still playing with these old things. Quote Link to comment Share on other sites More sharing options...
Neverdone Posted March 19, 2011 Share Posted March 19, 2011 Wait a second...what do you have left to do? Or are you just fine tuning from here on out? Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted March 20, 2011 Author Administrators Share Posted March 20, 2011 Wait a second...what do you have left to do? Front wheel bearings/bushings/ball joints, rear wheel bearings/bushings, half shafts, real brakes, interior, sound deadening, seals, paint & bodywork, ..., ..., ... That's just my warm up list Quote Link to comment Share on other sites More sharing options...
Neverdone Posted March 20, 2011 Share Posted March 20, 2011 Ok, so you're doing a full re-build. I didn't know exactly where you planned on going with this one. Oh yeah, and I've been meaning to ask you This is what an axle out of an E32 750il looks like. The ones in the E34 525i and a few other older Bimmers look similar just with varying CV joint size and axle thickness. Anyway, I was wondering if you know if these axles could be shortened or not? If they can, it would only take some pretty easy to fab brackets to get cv axles under our cars. Quote Link to comment Share on other sites More sharing options...
garvice Posted March 20, 2011 Share Posted March 20, 2011 Cheers for getting back on the pump mounting, it is appreciated. Sounds like it is working well if you don't hear it at idle. My external walbro was like yours, quite loud at idle. Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted March 20, 2011 Author Administrators Share Posted March 20, 2011 I haven't looked into BMW axles. There are other choices that are easy enough (280ZXT and Z31) and, if you looking for maximum strength and serviceability, the Porsche 930 stuff looks good. Blueovalz built his own and Wolf Creek Racing sells complete kits for Datsuns. Quote Link to comment Share on other sites More sharing options...
Administrators BRAAP Posted April 17, 2011 Administrators Share Posted April 17, 2011 Ron tossed me the keys to his Z this afternoon, was a nice treat driving my old S52 again. Impression, WOW! it was impressive in the 3300 lb M3, this engine in approximate 800 lb lighter S30, larger intake, freer flowing exhaust, what a blast to drive. A hybrid Z that retains all the sounds and character of the inline 6 cylinder with the power of a mild V8 or mild boost turbo without the lag or any weight penalty, makes for a fast and incredibly fun to drive S30. If I build another S30, this is the powerplant I will use. Nice job Ron and thanks for letting me flog your Z. Quote Link to comment Share on other sites More sharing options...
Neverdone Posted April 17, 2011 Share Posted April 17, 2011 So is there a sign up list now for rides/drives, or do I have to know the super secret handshake? Quote Link to comment Share on other sites More sharing options...
Leon Posted April 17, 2011 Share Posted April 17, 2011 We need video! Quote Link to comment Share on other sites More sharing options...
Nelsonian Posted April 17, 2011 Share Posted April 17, 2011 ^^^ I very much agree ^^^ Need some flogging and exhaust note video Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted April 17, 2011 Author Administrators Share Posted April 17, 2011 Paul, Thank you, and thanks again for providing the S52 on the cheap. That was the shove I needed to roll the dice. Thomas, I'm sure something can be arranged. Next weekend may work out... ping me later in the week. RE: Video's... I'll try to put something up once we get some decent weather. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.