Lightning mass air used for Blow through?

[OinkAodeOink]

Is this at all possible, to run a 90mm Lightning mass air meter in blow through on my 01 GT turbo application? From what I understand, it should work, but could peg the meter sooner then if ran in draw through fashion? I am only looking to make 350rwhp through a 4R70w trans 60-1 turbo on 7psi, fueled by 42lb injectors fed by a single SVT Focus pump. I plan on getting an SCT tune.. Is this something they can tune for or tune around?


Thanks for the help
-Mike

 

[ADRENLN]

i have wondered this lately also. i could have sworn guys were using lightning maf with centri blowers. i could be imagining it though. i hope they are ok, i feel that they are easier to get and last longer then these aftermarket maf. many of the others seem to blow out quick.

 

[OinkAodeOink]

unless the centrifugal blower setups are Procharger or custom intercooled.. they are running the meter is regular ol draw through style. My question is, can the Lightning meter be effectivly used on my application in blow through.. More so, will the meter peg out easly in this situation. right now Im babying it, with the stock tune and stock mass air/injectors ( mass air in blow through) and its driving fine.

 

[Don 95Vert]

You CAN use an LMAF in blow through - but it will peg sooner - to the tune of maybe 350-375 RWHP. You can help increase that in your turbo setup by having long straight sections of pipe in front of and behind the MAF. Since you are getting an SCT tune anyway, you may as well get a BA 2400 MAF. It too will peg sooner, but at around 475-500 in blow through. Another option - if your tuner will go along with it, is a Diablosport Maf.ia maf extender. They do work, but nort all SCT dealer are comfortable working with them. I think you will end up making more power than you think.

There is no good way to tune around a pegged MAF because it is a hard limit in the EEC. There are temporary band-aids they can use to help - but they should only be used to allow you to drive the car until you get a better MAF - they are very poor long term fixes.

 

[OinkAodeOink]

First off let me say thanks! as always you have knowledgable info..

That's the thing.. I know for sure I will never make 400-500rwhp.. The motor wouldnt last at that point. Even at 350rwhp that puts me around 450 flywheel horse (through a mostly stock 4r70w trans)..If you say the Lightning meter is good to 375rwhp max, with the straight section piping.. Maybe I should just keep it that way? The 42lb injectors are probably overkill at this point, but I have found the Lightning mass air/injector package cheap.. ($320 from Buyfordracing.com)

 

[Don 95Vert]

You're welcome.

The thing is if you get an LMAF - and I know they are cheap with the injectors - and the dealer gets to tuning it, and it pegs, it won't be so cheap anymore. Then you have to swap to a BA 2400 or a MAF.ia and that means a complete new retune and dynotime. The 375 RWHP is just an guesstimate - you really never know until it gets on the dyno. May take more, may take less.

And another thing to keep in mind with a turbo, you never will be able to get full load on a dyno - even if it is a Mustang dyno. Dynojets would be worse. Sometimes you won't even see near full boost on the dyno. But when you take it on the street or strip, it's a completely different matter - you will see full boost and full load - and if you have a MAF that's fairly close to pegging on the dyno, it WILL peg on the street or strip. We ALWAYS double check our customer's cars on the street. Even if you do get a bigger MAF, I'd advise you to have the dealer do a few WOT blasts on the street to be sure everything is still OK - with a 4R70W he will have to set shift points on the road anyway because that can't be done on the dyno.

Good Luck!!

Don

 

[OinkAodeOink]

Well you know your tuning, so I will take your advise,
and look into the SCT maf.. I can find the injectors fairly cheap, do you know of anyone with good prices on this meter? On the dyno tune... The guy I planned on taking it to (local SCT tuner, Justin Starkley) only tunes on the dyno.. So Im second guessing going with him.

This is the difficult half of it.. finding a good tuner to do it right the first time around! Im in Central Florida if you know of anyone good?

 

[Don 95Vert]

All the meters will be about the same - Justin is a good guy and knows his stuff - so you may as well get the meter from him. There really are no 'deals' on those meters because there isn't much of a margin on them. The MAF.ia is cheaper, but Justin doesn't sell those.