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post #1 of 13 (permalink) Old 06-24-04, 02:33 AM Thread Starter
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what size

If I am going to run a 75mm throttle body what size maf do I get and where do I buy it?


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post #2 of 13 (permalink) Old 06-24-04, 03:13 AM
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Re: what size

Go speed density w MAP sensor and Motec/Wolf etc etc comp. Long live carbs, only good reason to change to efi is boost
 
post #3 of 13 (permalink) Old 06-24-04, 06:01 AM
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Re: what size

http://performancepartsmall.com/

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post #4 of 13 (permalink) Old 06-25-04, 03:19 AM
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Re: what size

the problem with map is that they engine managemnt module has problems dealing with cams that have excess of 280* duration, maf is definetly the better way to go. i would suggest an 82mm maf

std stroke, alloy heads, comp cam, tfs manifold, 75mm t/b, 70mm maf, 30lb inj, adj fuel press reg, twEECer

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post #5 of 13 (permalink) Old 06-25-04, 04:10 AM
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Re: what size

Joking? proper tuned maf less systems better response less restriction etc, had to do with VL type serious turbo sytems, maf is good for instant self learnable (ie ford efi) systems but for real power tune on the clock (dyno)with map or pure race no map, no maf, systems. Again, long live the carb for easy simple (ish) big power, except for proper big power (ie no roots) big boost pump fuel applications. Though efi does give better economy. Dealt with both and efi is good if you have lots of TIME and MONEY, carb is easy (er) mostly. I mean look at standard 5.0 efi stuff everything above the block is rubbish (restrictive upper, lower, throtttle, small injectors, small capacity fuel system) for real power 5.6 manifold looks good for torque but where to start except for boost??. Not trying to discourage but jeez most (recent )carb type manifolds , DP type carbs, decent heads and squeeze and your going great for much less $$ (and pain)
 
post #6 of 13 (permalink) Old 06-25-04, 04:45 AM Thread Starter
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Re: what size

Blue.......Do you think a trickflow R manifold will be good enough?

So why have all manufacturers gone efi?

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post #7 of 13 (permalink) Old 06-25-04, 05:06 AM
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Re: what size

there is no reason that you could not extract the same amount of pwr out of a fuel inj moter as compared to a carbied motor, it all comes down to selecting the right combination of parts, as far as fuel is concerned you can get some pretty big injectors that can put in more fuel than what most street motors could probly handle. another point to add is that you have more control over your fuel delivery and thus (once tuned correctly) have the ideal a/f ratio that you desire throughout the whole rev range under what load.

i'm running a twEECer in my car and have the ability of turning off the addaptive learning if i want to have a hard core tune just for drags or dyno, and then a couple of different tunes for street use. as far as the type of meter to use, map relies on manifold pressure, and with a cam bigger than 280* duration this plays havoc with the manifold pressure, maf actually mesures the amount of air actually entering the motor and doesn't have any problems dealing with big cams.

blue66coupe have you had a look at the availibilty and styles of manifolds to suit the 302/351w's? there is a manifold to suit most applications, (as far as street driven cars are concerned) that produce really high #'s, with drivability and reliability.

as far as bang for your buck is concerend carby's are a great way to get pwr, but with todays emission std's it's a lot easier to go down the road of fuel inj.

std stroke, alloy heads, comp cam, tfs manifold, 75mm t/b, 70mm maf, 30lb inj, adj fuel press reg, twEECer

http://www.fpvtickfordclubwa.com.au/phpBB2/index.php

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post #8 of 13 (permalink) Old 06-25-04, 05:09 AM
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Re: what size

the r series manifold will produce great pwr, have you seen the new upper that bolts onto the lower r series manifold? really trick and is more so suited to high hp situations.

std stroke, alloy heads, comp cam, tfs manifold, 75mm t/b, 70mm maf, 30lb inj, adj fuel press reg, twEECer

http://www.fpvtickfordclubwa.com.au/phpBB2/index.php

http://www.tweecer.com

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post #9 of 13 (permalink) Old 06-25-04, 05:34 AM Thread Starter
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Re: what size

no I havent seen it. My concern is will it be too much for my engine?
Trick flow web site says (for a 5.0l)with a 75mm throttle body the "r" is good between 2500-7200(or there abouts)T
Track heat 1500-6500(or there abouts)

At the moment my engine comes on hard at 3000rpm and is all over at 6200rpm, So I am really unsure what to use.Will the extra cubes change the rpm range of these manifolds?

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post #10 of 13 (permalink) Old 06-25-04, 06:28 AM
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Re: what size

i dont think that the r series wouldn't be to big, and if you want to get some more pwr out of it in the future would still be able to pull a little bit more out of the r series as apposed to the trackheat.

as far as flow is concerend you are going to require a hell of alot of air due to the combo in which you have at present, thus it may? bring the rev range (r series) down to ~ 2k - 6.5k.

std stroke, alloy heads, comp cam, tfs manifold, 75mm t/b, 70mm maf, 30lb inj, adj fuel press reg, twEECer

http://www.fpvtickfordclubwa.com.au/phpBB2/index.php

http://www.tweecer.com

http://www.icenet.com.au/~pie
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