This is topic Supercharger pushing boost back out MAF under part throttle? in forum Tech Talk at Northern California Ford Owners .
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Posted by WIKD 281 (Member # 40) on
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When I am driving part throttle> the boost that will not enter the throttle body > will go back thru the bypass and then out the MAF> Making my car surge really bad. I have a Vortech S trim with aftercooler and a 3.1" pulley> I think its going to be around 12-15 psi. of boost with this forged internals motor> I have the AFM powerpipe.
Has anyone made a plate that mounts inside of the powerpipe that directs air back towards the blower so the MAF will not get the (backsurge) of air? It does not happen under WOT and only when I am part throttle> I know for sure its not the fuel because I have monitored the fuel gauge closely.
Thanks for any help 
Posted by shade-tree (Member # 298) on
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mount the MAF *backwards* (people do it) ![[worship]](graemlins/worship.gif)
Posted by 99gt-UJSTLST (Member # 584) on
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quote:
Originally posted by WIKD 281:
When I am driving part throttle> the boost that will not enter the throttle body > will go back thru the bypass and then out the MAF> Making my car surge really bad. I have a Vortech S trim with aftercooler and a 3.1" pulley> I think its going to be around 12-15 psi. of boost with this forged internals motor> I have the AFM powerpipe.
Has anyone made a plate that mounts inside of the powerpipe that directs air back towards the blower so the MAF will not get the (backsurge) of air? It does not happen under WOT and only when I am part throttle> I know for sure its not the fuel because I have monitored the fuel gauge closely.
Thanks for any help
hey was up
I had the same problem with my NOVI2000
what I did was add another byepass valve to make it go away so I run 2 byepass valves now
what happens is the smaller pulley creates more air pressure between the SC and the intake.
the MAF reads correct air flow into the SC but what is happening your pushing to much air into the intake and the car has to add more fuel there for makeing the car idle more
when you add anothere beypass valve you releave the pressure between the SC and the intake sure you are resurculating the air but you are not pushing any more air then you need
what iam trying to say is you need anothere byepass valve and it should fix your proplem
hey if you have any questions give me a call ill try to explain a little better
javier
408-835-2689
Posted by WIKD 281 (Member # 40) on
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I think I'm going to try to rotate the MAF and see if that helps> then if that doesnt work I will look into getting another bypass.
Thanks guys!
Posted by 99gt-UJSTLST (Member # 584) on
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quote:
Originally posted by WIKD 281:
I think I'm going to try to rotate the MAF and see if that helps> then if that doesnt work I will look into getting another bypass.
Thanks guys!
I have heard of flipping the MAF but does not make sence why you would do that I mean i though it only reads one way of course i might be wrong
any ways I really sure if you ADD anothere bypass valve it will take your problem away
later
Posted by WIKD 281 (Member # 40) on
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I'll give it a shot! 50 shot that is. he he
thanks bro.
Posted by 99gt-UJSTLST (Member # 584) on
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quote:
Originally posted by WIKD 281:
I'll give it a shot! 50 shot that is. he he
thanks bro.
50 shott DAMMM!!!!!
i gues iam goin to have to go 75-100 to go with 16 psi of BOOST
just to make sure you dont leave me behind
Posted by WIKD 281 (Member # 40) on
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LOL> naw> I'm just thinking about it for now> if I dont hit 600rwhp> then I'm gonna do something?
I talked to Byron and he said that because we're supercharged that the 50 shot would equal more like 100 at the wheels. So> 150shot would equal>?
lol.
we'll see?
he he
Hey, are you trying to run with WIKD 281> or just want to keep close
Just got back from a test drive> I moved the MAF and it solved about 75% of my problems! I am amazed.[ March 17, 2002: Message edited by: WIKD 281 ]
Posted by 99gt-UJSTLST (Member # 584) on
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quote:
Originally posted by WIKD 281:
LOL> naw> I'm just thinking about it for now> if I dont hit 600rwhp> then I'm gonna do something?
I talked to Byron and he said that because we're supercharged that the 50 shot would equal more like 100 at the wheels. So> 150shot would equal>?
lol.
we'll see?
he he
Hey, are you trying to run with WIKD 281> or just want to keep close
Just got back from a test drive> I moved the MAF and it solved about 75% of my problems! I am amazed.[ March 17, 2002: Message edited by: WIKD 281 ]
HAHA run with you Man I want to be ahead of you and youll lose LOL LOL LOL just kidding
I just want to run some nice times on drags
I want to amaze people with my little 2valve motor
I want to be next to you and wicked SS when you guys race
I want you guys to see come from beside and video take you guys shoked that iam pulling HAHAHA
shit yea like that wil happend then i will wake up LOL LOL LOL
Posted by WIKD 281 (Member # 40) on
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LOL> You could give WIKD 281 a try> but you might want to start with YOULLUZ> he he.
Probably have better luck running him
I'm sure that you're 2 valve will kick some ass when youre done> I dont think anyone is doubting that! I'm sure we'll get our runs in as well> I might need to take out my 200pound stereo to run you tho> just to make sure that it will be equal.
How much power you planning on putting to the rear wheels?
Later dude [ March 17, 2002: Message edited by: WIKD 281 ]
Posted by youl luz (Member # 53) on
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WIKD: considering that my car has a larger EVERYTHING(exhaust,blower,intercooler,intake,speed-pro EFI etc) compared to your car you might want to rethink that last post. Byron can tune it till the cows come home but i cant see you putting up better numbers then me....REMEMBER whos been doing this for longer...
you sure have me covered on 4x4s though.. LMFAO!!!!!!!!!!!!![ March 17, 2002: Message edited by: youl luz ]
Posted by 99gt-UJSTLST (Member # 584) on
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quote:
Originally posted by WIKD 281:
LOL> You could give WIKD 281 a try> but you might want to start with YOULLUZ> he he.
Probably have better luck running him
I'm sure that you're 2 valve will kick some ass when youre done> I dont think anyone is doubting that! I'm sure we'll get our runs in as well> I might need to take out my 200pound stereo to run you tho> just to make sure that it will be equal.
How much power you planning on putting to the rear wheels?
Later dude [ March 17, 2002: Message edited by: WIKD 281 ]
well iam hoping to push the same numbers you are as close to 600rwhp
thats why i might go put a 50 shot just to make sure i get there
but i might not need it
will see couse i have a 3 inch pully on my novi2000rr and a power pipe
wich should push on a stock motor around 20 psi
of course with all the head work I have done to the car it will bring my BOOSST to about 17 but will see once i break it in
when i had my original motor it was showing afthere 5000 rpm 10 psi and with every 200 rpm that the car was climping i would gain 1psi
i would only take it to 6000 and it would show 15 psi of course the motor blew up
i never dynoed it or even got to run it at the track
but with all the head work iam getting done i should be able to rev to aabout 7000
I am not saying ill beat you or gabe but
iam goin to try to give you a run for you money
so was goin on with you ride gabe when we goin to see it run at the track I want to see where the mark is set at wich ever time is faster you or harold thats goin to be my goal to beat in my 2 valve i mean hey if you guys run low 9's or 8's well shit i now i wont beat it or come close untill my next build when i add a 5.4 motor
but iam sure if you run some 10's ill coem close to them
Posted by WIKD 281 (Member # 40) on
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YOULLUZ> You know its funny that you post on this topic> did you not see the post that I put to your attention a few days ago> that you never replied to but 15 other people did>lol
I dont really care if you have larger EVERYTHING on your car> if you have a faster car than me> then awesome> I'm glad you do! You have a faster car then me> I know that> you should anyways because you spent about another $25,000 on it compared to me> anyways> if and when you FINALLY get your car tuned and running will be a great day!
To all his own.
No haters here> I like your car> just wish you could get it running and show everyone what it will do!!!!
I hope you pull some awesome numbers!
Later.99GTUJSTLST> Whats up bro> Sounds like you got it all planned out! Thats awesome> I'm sure we'll make some runs at the track> wouldnt doubt you'll beat me with that much boost tho!
[ March 18, 2002: Message edited by: WIKD 281 ]
Posted by 99gt-UJSTLST (Member # 584) on
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quote:
Originally posted by WIKD 281:
YOULLUZ> You know its funny that you post on this topic> did you not see the post that I put to your attention a few days ago> that you never replied to but 15 other people did>lol
I dont really care if you have larger EVERYTHING on your car> if you have a faster car than me> then awesome> I'm glad you do! You have a faster car then me> I know that> you should anyways because you spent about another $25,000 on it compared to me> anyways> if and when you FINALLY get your car tuned and running will be a great day!
I guess I could have spent all my money on speed> but I also enjoy LOUD stereos and wakeboard boats
To all his own.
No pun intended bro.
I hope you get your car tuned soon and I hope you pull some awesome numbers! But> My car is not on the same playing field as you because my car is a street car and not a race car.
Later.99GTUJSTLST> Whats up bro> Sounds like you got it all planned out! Thats awesome> I'm sure we'll make some runs at the track> wouldnt doubt you'll beat me with that much boost tho!
beat you no i dont think so will be close though its like goin to be to the point were u win me most of the time but here and there ill get one on u LOL but will see i cant wait to see what our little 281 can do
Posted by WIKD 281 (Member # 40) on
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quote:
Originally posted by 99gt-UJSTLST:
beat you no i dont think so will be close though its like goin to be to the point were u win me most of the time but here and there ill get one on u LOL but will see i cant wait to see what our little 281 can do
I agree bro> its gonna be fun! I honestly think you'll beat me> your car weights much less than mine and youre going to be at the same power level. If you need any help with anything let me know!
Later.
Posted by 99gt-UJSTLST (Member # 584) on
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quote:
Originally posted by WIKD 281:
I agree bro> its gonna be fun! I honestly think you'll beat me> your car weights much less than mine and youre going to be at the same power level. If you need any help with anything let me know!
Later.
well what i need help on is the fuel
but on the 30th ill just look at yours
so i can get a better picture
i now how iam goin to do my fuel
but just want to see your to make sure i better understand
Posted by 2000BlackGT (Member # 283) on
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Harold, so did you fix your problems yet?
Posted by shade-tree (Member # 298) on
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sounds like smack talking up there! 
Posted by 89hatchback_lx (Member # 587) on
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Im an instigator.
Posted by WIKD 281 (Member # 40) on
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quote:
Originally posted by shade-tree:
sounds like smack talking up there!
Just fun and games bro> its all for fun!
Black2000gt> whats up bro? Yeah> I fixed most of the problem by rotating the MAF.
Posted by 99gt-UJSTLST (Member # 584) on
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quote:
Originally posted by WIKD 281:
Just fun and games bro> its all for fun!
Black2000gt> whats up bro? Yeah> I fixed most of the problem by rotating the MAF.
hey me talk shit never iam not shit talker all in good fun we just talking you now we now our shit will be fast
we wont be the fastest but will be one of the fastest
Posted by shade-tree (Member # 298) on
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bragging rights.... as far as I know, go to John91coupe.Airs up the ET streets, drives an hour to Sacramento each way, drops the pressure a bit, launches from idle w/no transbrake and probably the wrong stall to a mid 9 at 145, pumps up the tires and heads home
Posted by 99gt-UJSTLST (Member # 584) on
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quote:
Originally posted by shade-tree:
bragging rights.... as far as I know, go to John91coupe.Airs up the ET streets, drives an hour to Sacramento each way, drops the pressure a bit, launches from idle w/no transbrake and probably the wrong stall to a mid 9 at 145, pumps up the tires and heads home
hey I now john run some sick ass times but iam not trying to beat him
but who nows i might get crazy put the slicks on and say fuck it with 17 psi of boost add a 100 shot just to run thouse kind of times
NOT yet though i want to drive this motor for at least a year before KABOOM and i now if i add NOS its goin to give me some damm good time but shit only 2 passes if iam lucky LOL
Posted by shade-tree (Member # 298) on
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I don't think that will buy you 145 mph, but what do I know.maybe 17psi +100 shot+ 1000 lbs. of weight reduction
Posted by WIKD 281 (Member # 40) on
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No doubt John is the fastest> but for (true) street cars the battle that is questionable.
I'm just having fun> this post is getting better and better
Posted by 99gt-UJSTLST (Member # 584) on
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yea it is but like i said all in good fun
becouse me talk SHIT never on the net only to people face LOL
Posted by Yellow94GT (Member # 431) on
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You guys may have a little more competion for the 5.0 croud. I got something in the works . Needs fuel and a better tranny. Hopefully I can get it together before you guys start playing 
Can't wait till we have a Norcal vs. 98Cobra night at sac Later guys, Drew
Posted by shade-tree (Member # 298) on
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is there one person in this thread *without* something in the works?
Posted by st5150 (Member # 51) on
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quote:
Originally posted by shade-tree:
is there one person in this thread *without* something in the works?
Now there is ![[patriot]](graemlins/patriot.gif)
Posted by WIKD 281 (Member # 40) on
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quote:
Originally posted by Yellow94GT:
You guys may have a little more competion for the 5.0 croud. I got something in the works . Needs fuel and a better tranny. Hopefully I can get it together before you guys start playing Can't wait till we have a Norcal vs. 98Cobra night at sac Later guys, Drew
Sounds good guys! I'm sure this summer we'll have tons of fun! Hopefully everyone gets their cars dialed in> I need all the hope I can get!
Posted by shade-tree (Member # 298) on
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quote:
Originally posted by st5150:
Now there is
somebody told me that with a fixed rear-main seal you'd be smacking down Jim with slicks? or Luke when he comes back?