Art Nadel Posted December 16, 2008 Share Posted December 16, 2008 Gents, Sorry this is a bit like religion. People will argue both sides. But some seem to like the Arizona Z 4 bbl coversion. It seems that with just a bit of work it can be set up to "blow through" on a 280ZX turbo car. But if I do it, can I keep the stock ECU to run the ignition? Does the ignition programing need any of the old FI inputs like AFM or TPS? Appreciate your opinions. Art Quote Link to comment Share on other sites More sharing options...
Tony D Posted December 16, 2008 Share Posted December 16, 2008 Stock ECU? No, don't even waste your time. The blowthrough is doable (the centrifugal supercharger setup I saw used this kind of setup, with an EFI TB and programmable EFI)... Megasquirt is cheap, functional, and four barrel air doors are a dime a dozen on E-Bay! Quote Link to comment Share on other sites More sharing options...
Art Nadel Posted December 16, 2008 Author Share Posted December 16, 2008 Stock ECU? No, don't even waste your time. The blowthrough is doable (the centrifugal supercharger setup I saw used this kind of setup, with an EFI TB and programmable EFI)... Megasquirt is cheap, functional, and four barrel air doors are a dime a dozen on E-Bay! Tony, Thanks for jumping in. Sorry I must not have made my situation clear. Considering the four barell carb to avoid any kind of electroic fuel control. That part is easy for NA engines. And with NA many kinds of distributors will work fine. But with Turbo, it gets more interesting. Am sure I can engineer the plumbing to pressurize the Holly. But am aware that turbos like to retard the timing when on full boost. So that is where I am worried about using simple distributors. Heck, if I was willing to do the Megasquirt, would not be thinking about the switching to a carb. I am really old school and have been plauged with issues related to EFI, on my 280Zx which I have road raced with good sucess for four years. Have been lusting for the good old days when we raced NASCAR with a single four barrel, made tons of HP, and only needed a screw driver to adjust the carb. I have straight through exhaust, no cat no nothing. Manual boost control set to 12 PSI steady state on dyno. Wide band. Liquid to Air PWR intercooler. Jim Wolf ECU. Adustable fuel pressure. And make 250 wheel HP with stock injectors. Only melted pistons once -LOL. Remember, this thing does not make quarter mile dash. On the track it runs flat out for 20 minutes at at time. Actually I have calculated that it is WOT about 50% of the time. Art Quote Link to comment Share on other sites More sharing options...
GeeZ Posted December 16, 2008 Share Posted December 16, 2008 Find yourself a Turbo Tom Kit. Custom intake/exhaust. Quote Link to comment Share on other sites More sharing options...
(goldfish) Posted December 16, 2008 Share Posted December 16, 2008 You can use MS to do spark only. Quote Link to comment Share on other sites More sharing options...
S130Z Posted December 16, 2008 Share Posted December 16, 2008 MS can be used for spark only. If you are woried about retarding the ignition, MSD ignition systems can be equipt with a boost retard box that, I think, allows up to 4 degrees of movement. Quote Link to comment Share on other sites More sharing options...
SHO-Z Posted December 16, 2008 Share Posted December 16, 2008 I am in a similar quandary, I have figured out what I am going to do on the for the ignition on my blow through triples supercharged using my current engine STD 280z, remove the vacuum advance and only use the centripetal advance. I have a turbo engine sitting on an engine stand and what to use on it is another question. I was looking at MSD timing units but really do not know which one to use. I guess that Megasquirt would be an option. I have read that you have to change out the oil pump to use a standard distributor on a turbo engine so I guess this is another option. What I really need to do is get off of my dead ass and get the supercharger installed! Quote Link to comment Share on other sites More sharing options...
S130Z Posted December 16, 2008 Share Posted December 16, 2008 http://www.msdignition.com/Products/Ignitions/Street/Strip/Analog/6462_-_MSD_6-BTM_Boost_Timing_Master.aspx Quote Link to comment Share on other sites More sharing options...
Matadem Posted December 16, 2008 Share Posted December 16, 2008 If you're looking for turbo and carb info www.theturboforums.com seems to me the clifford intake should work better than the Az but I am not sure drawthru carb setups works too check this pic 4 cil datsun drawthu setup (the mustang runs 10's) Quote Link to comment Share on other sites More sharing options...
510six Posted December 19, 2008 Share Posted December 19, 2008 My first turbo motor used a 81 non turbo VR distributor hooked up to a MSD digital 6 and a boost timing box. These days all of the functions of a digital ignition box and boost proportional timing retard can be had in the same box. http://store.summitracing.com/partdetail.asp?autofilter=1&part=SUM%2D850604&N=700+4294925127+400304+115&autoview=sku Quote Link to comment Share on other sites More sharing options...
letitsnow Posted December 20, 2008 Share Posted December 20, 2008 I'll second the blowthrough section of theturboforums.com, there are some REALLY fast cars over there. My first turbo motor used a 81 non turbo VR distributor hooked up to a MSD digital 6 and a boost timing box. These days all of the functions of a digital ignition box and boost proportional timing retard can be had in the same box. http://store.summitracing.com/partdetail.asp?autofilter=1&part=SUM%2D850604&N=700+4294925127+400304+115&autoview=sku You could use a megasquirt to do the same thing for the same, or less money, Quote Link to comment Share on other sites More sharing options...
Clifton Posted December 20, 2008 Share Posted December 20, 2008 AZC used to run and make a blow through set up back in the early 90's. I would just do MS and keep it efi just from a cost stand point but if you wanted to blow through you could use the msd 6al btm (more $ than MS) and be able to control timing under boost. Or even cheaper, use an hei to fire the coil and use the non 6a BTM to control timing. Quote Link to comment Share on other sites More sharing options...
SHO-Z Posted December 20, 2008 Share Posted December 20, 2008 What I was talking about is advance on the distributor not retard under boost. The turbo distributor has no internal advance in it. Quote Link to comment Share on other sites More sharing options...
510six Posted December 22, 2008 Share Posted December 22, 2008 The Summit box (really, a Mallory box) works like a MSD boost timing master at a lower cost.http://www.malloryperformance.com/ProductDetails.aspx?modelNumber=685&productID=2562&majID=534&minID=5342&selection=3&minselection=1 The CDI unit also delivers 137 mj of energy , which should deliver more than enough spark for a turbo motor. Quote Link to comment Share on other sites More sharing options...
Matadem Posted December 22, 2008 Share Posted December 22, 2008 My project car will be blowthru carb with megasquirt controlling timing Those turbo dist are hard to find and expensive to replace I will be using the na dist locked Take a look at this monster this guy claims to have about 800hp it sure looks like star trek meets old school lol on a 6 cylinder engine http://img401.imageshack.us/my.php?image=800jn0.jpg even those old slant 6 engines runs 11's now on carbs/turbo Quote Link to comment Share on other sites More sharing options...
S130Z Posted December 22, 2008 Share Posted December 22, 2008 Those numbers are easy to achieve with a boosted 350. Take a look at a thread called Turbo V8 280zx, or something along the lines of that. He is pushing around 600 on low boost. Quote Link to comment Share on other sites More sharing options...
Tony D Posted December 22, 2008 Share Posted December 22, 2008 Just for the Record... There was a full bodied 280ZX featured in some hot Rod Magazine in the late 80's built by Richard's Z & ZX Service in L.A. that turned 11's on the L28 using a draw-through four barrel setup... Remember his location: SoCal... There will be smog compliance issues for the next few years on his setup if he wants to drive it on the street. Legally. Quote Link to comment Share on other sites More sharing options...
510six Posted December 23, 2008 Share Posted December 23, 2008 -------------------------------------------------------------------------------- "Just for the Record... There was a full bodied 280ZX featured in some hot Rod Magazine in the late 80's built by Richard's Z & ZX Service in L.A. that turned 11's on the L28 using a draw-through four barrel setup..." http://www.youtube.com/watch?v=HmF1rUa8Ek A Turbo Toms kit might be hard to find nowdays. http://www.theturboforums.com/smf/index.php?board=13.0 http://www.bryanf.com/510/cars.htm Quote Link to comment Share on other sites More sharing options...
sorealsosurreal Posted December 23, 2008 Share Posted December 23, 2008 i was thinking about this idea myself just a stock turbo manifold, 4 barrel intake and a holley carb. seems like it would be easier for myself to put together then all that efi crap. i have af ew extra blocks so when i have the money maybe ill experiment with the idea. keep us updated Quote Link to comment Share on other sites More sharing options...
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