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Goodbye Speed Density, Hello Mass Air?
With several signifigant mods upcoming, such as heads, cam, intake, TB, and more, should I ditch my 87's Speed Density airflow system for the supposedly more effecient and mod-friendly Mass Air system?
As alway, your feedback is very welcome and greatly appreciated. ------------------ 98 Mustang coupe 3.8L V6 87 Mustang GT hatchback 5.0L V8 87 Bronco XLT 4bbl 351W My mom drives a 99 Mustang GT convertable. |
YES!
Ian ------------------ Ian Sim webmaster@stangpower.com STORED: 1988 Mustang GT "Canadian Cobra", stock, AOD, loaded WANT XENON HEADLIGHTS AND WHITE FACE GAUGES? Visit my site: http://www.stangpower.com |
what cam. if you are not going more than an e cam, then leave speed density. put money elsewhere. just my opinion.
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Thanks for the replies. Heard the same thing from a couple other people, you guys are pretty knowledgable on here so I decided to consult you too.
See ya later Speed Density. I guess I'll add a MAF conversion kit to my list. Thanks again. |
ARE YOU CRAZY!!!!! With the money you are going to waist on that you could put a posi, and gears. LONG LIVE SPEED DENSITY..I am fixing to show all of you low 11s on SPEED DENSITY
------------------ Jason B Johnson 88LX,speed density,edel heads,4.30s,B-303,cobra,tremac, 12.38 @ 111.28 1.80 60ft 28X10 street tires 12.17 @ 112 26 X 10 slicks http://www.mustangworks.com/mustangs...g347-slot3.jpg |
Listen to Jason, obviously he knows what hes doing with his setup, look how fast its going. I'm jelous as hell of it. I wish it was mine.
Skyler ------------------ -1989 Saleen Mustang #406- TFS Heads, Edelbrock intake, E-303, 3.73's, 1 5/8 shortys, Offroad-H, 2chamber flows, 36psi FPR, 15degrees timing, 70mm tb, 73mm maf, 24lb inj, Crank pulley, MSD6A, Alum driveshaft. On its way: Paxton Sn-89 with dyno tuning and long tubes. Just added: B&M Ripper, Weldin Subframes, & Turn downs! 13.2@106mph |
you can listen to me too. i am running an f cam. that is the biggest cam you can run without fly cutting. there is nothing wrong with speed density.
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If he gets heads/cam/intake it will be very hard to get the idle correct.
I would just get a used kit, or buy pieces used and put a conversion together. Ian ------------------ Ian Sim webmaster@stangpower.com STORED: 1988 Mustang GT "Canadian Cobra", stock, AOD, loaded WANT XENON HEADLIGHTS AND WHITE FACE GAUGES? Visit my site: http://www.stangpower.com |
no it won't. how do you know, do you have any mods like 88workcar and myself.
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88 workcar and Brian88. While you're here I was wondering if any of the Turbo 4 ford cars were speed density? And if so would I be able to use a map sensor off these cars on my speed density 5.0 that will be getting 2 turbos in the near future. Speed density cant be all wrong seeing as how Accells DFI is speed density and there are guys running power adders with that setup thanks
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Either Paxton or Vortec just released a blower for SPEED DENSITY cars. Jimmy LaRocca still uses it. I have never had an idle problem. B-303, E-303, Wolverine 1087. These old myths are spread by people who have never had S/D or didn't try to do any mods with it. I am going to set up a fuel injected 393 stroker with http://www.mustangworks.com/interact...gboard/eek.gif SPEED you guessed it DENSITY http://www.mustangworks.com/interact...gboard/eek.gif
------------------ Jason B Johnson 88LX,speed density,edel heads,4.30s,B-303,cobra,tremac, 12.38 @ 111.28 1.80 60ft 28X10 street tires 12.17 @ 112 26 X 10 slicks http://www.mustangworks.com/mustangs...g347-slot3.jpg |
Yup,Jason(88Workcar) is right.I know because when I went to buy my paxton blower kit,there was a speed density kit AND a mass-air kit also.I'm not sure what Vortech offers.
I do know a guy who(used to be a member on this very site even) had a Paxton blower on a 87GT who ran a best ET of 12.166 @ 112mph with a speed density kit installed on his car. There is nothing wrong with speed density,you just have to understand it and know how to tune it correctly. Kinda like Paxton ball-drive blowers,I get all kinds of people saying they never hold up,you can't make them run good ET's,etc,etc,whatever.Well guess what,there will always be us underdogs that prove otherwise http://www.mustangworks.com/interact...board/wink.gif ------------------ Paxton Blown 87GT |
I 4 1 love mass air. I converted my 88 GT to mass air from a 90 LX and added a 73 C&L with all kinds of intake exhaust mods. I have the timing set at 14 degrees and everything is in sync. Before with the lousy speed density my car would ping under load at 10 degrees advance.
------------------ 88 GT mass air conversion from 90lx, Cobra Intake(ported/polished lower),Edlebrock Heads(ported/polished),24# injectors 70 mm BBK TB, 73mm C&L, 347 SB, Wolverine custom cam, 150 shot Nitrous, BBK 1 3/4 long tubes, BBK off road H pipe, Dynomax cat back, alum driveshaft, Konis,Southside Bars w chromemoly torque boxes, 4.10 with Auburn diff, SVO springs, subs, cross drilled rotors,MSD A6 w ign retard, black magic fan etc. |
I have a question for you guys. could I just get the 70mm cobra kit from ford, and use the module and the injectors.....and not use the mass air meter???
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redrider, your cvar prolly pinged cuz you put 24's on there and it couldn't use that much fual(didn't need it)
I've run 12.76@106.7 at 3460lb race weight and I FIRMLY beleive this car will go 12.4 w/bigger fuel pump, I have 110lph now and 320hp is the limit, well to 12.7@106@3460 it requires 113lph and 323 hp. I beleive I'd have 350-360hp if I could feed the fuel demand Next year it WILL run 11.9 SPEED DENSITY and if I make the move to a 351 block I'll stay S/D until mass air is required. 88workcar, I'm gonna email you again, its paris @ somewhere right? ------------------ ram air 70mm tb ported performer ported 289heads 1.94,1.6 1 5/8 LT's |
Nah, SD will run okay with 24lb injectors on a stock motor. I've seen it, so I should know. It does surge a little though.
I don't know what mods you had on the motor before you switched, but had you just monkeyed with an AFPR you should have been able to tune the system properly. |
I thought that spped density was good untill I switched. Now the car runs perfect. No surging, cold knocking or anything. The exhuast note changed and sounds better now too. I will NEVER look back.
------------------ 87 GT, 4 inch cowl hood,17x9 Cobra R's/255/45's,GT-40 heads,long tubes headers,h-pipe,Flows,BBK cold air, Mass air,70mm MAF, 1.7's, 1" spacer,underdrive pulleys,Pro 5.0, King Cobra, Adj. fuel Reg., Lakewood Lift Bars,50/50's,subframes, 4.10's. Best time 13.012 Best MPH 104 Best 60' 1.816 Visit my site at: http://www.geocities.com/cobrar93_2000/MyPage.html |
88workcar, after reading this,Im deciding more and more not to buy a DFI and try to run the 2 turbos w/ SD. My question is mainly the fuel system, will it support 42lb injectors? I plan on a 5.8, something with a cam similar to a Lightning, and what can I use for a MAP sensor to add fuel under boost? Because from what I understand the MAP sensor is a big factor in fuel control. THANAKS
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