Guest Anonymous Posted May 16, 2003 Share Posted May 16, 2003 Ive seen that people suggest one of the best mods to put on a stock L28 is a turbo? I just want to be able to spank mustangs and honda's myself and have a daily driver. Im already looking at doing the basic, intake and exhaust mods, getting headers and 2.5 exhaust.. whats the pro's of going to 3"? If I did this my question would be, what headers have a 3" exhaust port? wouldn't it be pointless to put 3" pipes on a 2.5" header? How much work would be involved in just taking my bone stock 2.8 to a turbo'd counterpart? Ive done a few searches, and it's been a futile attempt.. ANY information would be much appreachiated.. Sincerely, Joseph (Joey) Burg Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted May 16, 2003 Share Posted May 16, 2003 No Idea's Tim? Quote Link to comment Share on other sites More sharing options...
CU Zcar Posted May 16, 2003 Share Posted May 16, 2003 Well I'm in the process of building a Turbo motor out of a 280ZX, and this is after I've done most of the "easy" stuff to my 1978 N/A L28. I rebuilt the engine with flat-top pistons (~10:1 CR with N47 head), installed a header and cheap crush-bent 2.5" exhaust, got a big K&N cone filter and built a little intake pipe out of hardware store plumbing bits, and I swapped a cylinder head from my '78 parts car with a mild aftermarket cam installed and the exhaust inserts removed. I'm also running 195/60/14 tires as opposed to 195/70/14 stock size, so I'm effectively getting a higher (numerical) gear ratio. I took a car that would run something like a 16.5 (?) quarter mile in stock form to a 15.479 best, my other runs since putting the stuff on have ranged 15.5-15.7 mostly (I'm not the best drag racer and I had worse tires the second time). There's a few more easy mods like the 60mm throttle body, for example, and I should probably do a little tuning since I have not yet touched my AFM or made any other adjustments yet, the car runs a little rich through some RPM's and for all I know power may fall off on the top end from leaning out. I think with a few more mods I could get the car into low 15's, maybe 14's? If you had some porting done and used a more radical cam, I'm sure the sky is the limit with how much power you wanted to make, but it costs $$ I've read in various posts that Turbo swaps in early Z's should get you into high 14's anyway, without modifying anything. Then there's always more boost...from what I understand boost is easier/cheaper to make than porting/other N/A mods past a point. The Turbo swap is supposedly pretty straightforward, you swap in the Turbo engine (or use yours, but the Turbo has a superior cylinder head), replace your EFI with the Turbo wiring and ECU, wire it up, and go. If you use a T-5 transmission from a Turbo you have to modify the transmission crossmember to fit I think, or you can use your N/A transmission but it's supposedly weaker (I'm using the N/A one anyway). I don't know the little things about the swap yet cause I haven't done it yet but I have no doubt I can do it. Sorry if I missed your point by a bit, but here's a quick question...if you do want to go turbo, you might not want to spend any money on N/A mods (like the header and matching exhaust) that you'll just throw out or have to change when you do a turbo swap. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted May 16, 2003 Share Posted May 16, 2003 I can't believe you've found no information on this. This is a frequently discussed subject. What it comes down to is it's quicker and cheaper to find a 280ZXT donor and swap in the motor and electronics. You can bolt on a myriad of parts on the stock Z motor and have a less-able platform for a bigger time investment and possibly more $$. But the stock ZXT swap with a good intercooler and exhaust will beat down the hordes of stock mustangs, just bump the boost to 12psi or so, stock turbo fuel system. And you don't want a header for a turbo swap, you want a turbo exhaust manifold - you bolt on a 2-1/2" or 3" exhaust at the turbo outlet. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted May 16, 2003 Share Posted May 16, 2003 Oh..... okay. So a swap would be a better idea... thanks Youz guyz. -Joey Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted May 16, 2003 Share Posted May 16, 2003 Well I'm in the process of building a Turbo motor out of a 280ZX, and this is after I've done most of the "easy" stuff to my 1978 N/A L28. I rebuilt the engine with flat-top pistons (~10:1 CR with N47 head), installed a header and cheap crush-bent 2.5" exhaust, got a big K&N cone filter and built a little intake pipe out of hardware store plumbing bits, and I swapped a cylinder head from my '78 parts car with a mild aftermarket cam installed and the exhaust inserts removed. I think you'll be making a mistake turbocharging a 10:1 compression motor, especially with a n/a performance cam. To make power without having to use race gas or serious ignition retarding, you need a low compression motor, at most 8.5:1. 10:1 will shell itself under boost. Quote Link to comment Share on other sites More sharing options...
CU Zcar Posted May 16, 2003 Share Posted May 16, 2003 Ah, I was unclear. No, it would be silly to turbocharge a 10:1 motor. I meant to say that I feel I've exhausted my (cheap&easy) options with the N/A high compression motor and I'm building up a separate Turbo engine, complete with P-90 head, stock Turbo cam and dished pistons. Quote Link to comment Share on other sites More sharing options...
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