My MAF Story
Thread Starter
Racer
Joined: Dec 2008
Posts: 365
Likes: 0
From: Port Richey FL
My MAF Story
Was on the fence about de-screening it. My tuner urged me to do it.
I have a 383 stroker with a large cam, 244-248 113 LSA, cnc heads, ported TB and a vararam.
I used a dremel and ported and polished the MAF up, turned out very nice. The throttle response is much improved and very smooth. My tuner will have the car tomorrow at the dyno and he will make the added adjustments for the mod.
I have a 4:10 gear and it would not be overly happy in 6th gear at 1500 RPM, now its smooth as silk. AFR was still 14.4 - 14.8, not bad.
I was very skeptical, hence the lack of pics, but I must say the time I spent porting and removing the screen was worth it. By the way, that screen was much thicker then I anticipated it to be.
That is all.
I have a 383 stroker with a large cam, 244-248 113 LSA, cnc heads, ported TB and a vararam.
I used a dremel and ported and polished the MAF up, turned out very nice. The throttle response is much improved and very smooth. My tuner will have the car tomorrow at the dyno and he will make the added adjustments for the mod.
I have a 4:10 gear and it would not be overly happy in 6th gear at 1500 RPM, now its smooth as silk. AFR was still 14.4 - 14.8, not bad.
I was very skeptical, hence the lack of pics, but I must say the time I spent porting and removing the screen was worth it. By the way, that screen was much thicker then I anticipated it to be.
That is all.
Last edited by squidwards vert; Jun 9, 2009 at 11:02 PM.
Drifting
Joined: May 2007
Posts: 1,546
Likes: 30
From: WENTZVILLE MO
Maf
Well, I justed posted a question about porting the MAF. I have a Jet Performance and Granatelli MAF and my tuner did not want to tune an aftermarket MAF. Others have suggested to descreen the stock and port it. Glad to see that this does at least effect the butt-dyno. How deep do you go on the MAF?
Thread Starter
Racer
Joined: Dec 2008
Posts: 365
Likes: 0
From: Port Richey FL
Didn't measure it really, guess cause I was skeptical, LOL
I have done some TBs before so it was minimal
Just used my dremel and two different grades of grinders, then polished it up. Duh I may have use poor terminilogy. By hand I meant a dremel in my hand as opposed to some complicated cnc machin or such. My apologies. I'll edit the post.
Thanks
I have done some TBs before so it was minimal
Thanks
Race Director
Joined: Dec 2000
Posts: 19,304
Likes: 85
From: San Diego CA
...just a word of warning for those who have aftermarket intake filters and who are considering this mod....Don't do it unless you plan to have your car dyno-tuned. The extra turbulent flow can cause the ecu to throw a lean code or two. This is very common to 02-04 Z06 owners who install an aftermarket intake filter system.
Le Mans Master
Joined: Nov 2003
Posts: 8,004
Likes: 250
From: Tampa Fl
St. Jude Donor '12-'13-'14
two years ago i went back and forth for about a year between my screened and unscreened MAF.
I found the car had a little better throttle response off the line, but was worse with bucking and surging in a parking lot at low RPMs.
The little bit I know about tuning now, I could have fixed that with my HPT.
Last month, I upped to an 85mm MAF, but I went screened mainly because it was $29.00 on Feabay.
I spend a couple hours tuning it after I installed the 85mm MAF and the car runs much better.
its a heads or tailed with taking out a MAF and installing a new one, but if you have a tuner, he should be able fix the low end bucking
squid we still need to hook up
I found the car had a little better throttle response off the line, but was worse with bucking and surging in a parking lot at low RPMs.
The little bit I know about tuning now, I could have fixed that with my HPT.
Last month, I upped to an 85mm MAF, but I went screened mainly because it was $29.00 on Feabay.
I spend a couple hours tuning it after I installed the 85mm MAF and the car runs much better.
its a heads or tailed with taking out a MAF and installing a new one, but if you have a tuner, he should be able fix the low end bucking
squid we still need to hook up
Racer
Joined: May 2007
Posts: 391
Likes: 2
From: NC
Hard to imaging a car running smooth as silk with that size cam, but glad you got it done. Here's a link to the not so fortunate.
http://forums.corvetteforum.com/c5-z...m-forever.html
http://forums.corvetteforum.com/c5-z...m-forever.html
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Thread Starter
Racer
Joined: Dec 2008
Posts: 365
Likes: 0
From: Port Richey FL
Hard to imaging a car running smooth as silk with that size cam, but glad you got it done. Here's a link to the not so fortunate.
http://forums.corvetteforum.com/c5-z...m-forever.html
http://forums.corvetteforum.com/c5-z...m-forever.html
Its all in the tune. 1500 RPM in 6th gear with the AC on baby. I'm lovin it.
Banned Scam/Spammer
Joined: May 2007
Posts: 15,685
Likes: 1,330
From: Machineguns, because I don’t compromise
I pulled the screen out of mine with a pair of needle nosed pliers, but I'd never port the housings. Too much risk for little gains.
My last twin turbo LS1 did just fine with the de-screened stocker.
My last twin turbo LS1 did just fine with the de-screened stocker.
Thread Starter
Racer
Joined: Dec 2008
Posts: 365
Likes: 0
From: Port Richey FL
And just for the record, (not directed at anyone individual) my title was, MY MAF STORY no where do I recommend anyone to do this. Each individual should make their own decision based on their parameters, careful research and consultation with their tuner. That's why I also included my mods and that I was re-tuning it as well.
Further, I have had some experience in porting TBs and intakes so it was no big deal to me. Just completely disassemble it to protect the diodes (?) or whatever they are called.
thanks
Pro
Joined: May 2006
Posts: 723
Likes: 0
From: MOTOWN / Fort Dix NJ MI
I descreened my Maf... but I have a big cam and some heads on it I could definately tell the difference ... I need to retune cause the car is running a bit rich but that was before the descreen
Le Mans Master
Joined: Nov 2003
Posts: 8,004
Likes: 250
From: Tampa Fl
St. Jude Donor '12-'13-'14
to visit mickey and friends 
Advanced
Joined: Apr 2007
Posts: 94
Likes: 0
From: Las Vegas NV
...just a word of warning for those who have aftermarket intake filters and who are considering this mod....Don't do it unless you plan to have your car dyno-tuned. The extra turbulent flow can cause the ecu to throw a lean code or two. This is very common to 02-04 Z06 owners who install an aftermarket intake filter system.
Thread Starter
Racer
Joined: Dec 2008
Posts: 365
Likes: 0
From: Port Richey FL
