RX-7 AIR FLOW METER

Gottagofaster · Post by **Gottagofaster** » November 14th, 2006, 9:35 pm

I just put a RX-7 MAF on my 1.8bp.....and My throttle response and low end power are gone.......I have no idea why this would be happening....
after you hit 5k it pulls harder than it did with the old maf but before that it's really slugish....
any ideas?
thanks
Kurt

Limegreen mx-3 · Post by **Limegreen mx-3** » November 14th, 2006, 11:14 pm

thats just the way performance is u can't have the best of both worlds. ur problay going to have to adjust it there is a write up on it but u'll have to find becasue i have to lookfor it too.

Gottagofaster · Post by **Gottagofaster** » November 14th, 2006, 11:25 pm

Ok i advanced my timing....as far as the bolts would allow..but that didnt' help enough so took out the bolts and advanced it until i thought it ran right. Jury rigged it to stay in place....i took it for a a spin...and now the low end power is back but the high end doesn't really kick like it did earlier lol....
~so i guess your right....I would like a middle ground for daily driving

Limegreen mx-3 · Post by **Limegreen mx-3** » November 14th, 2006, 11:30 pm

Gottagofaster wrote:Ok i advanced my timing....as far as the bolts would allow..but that didnt' help enough so took out the bolts and advanced it until i thought it ran right. Jury rigged it to stay in place....i took it for a a spin...and now the low end power is back but the high end doesn't really kick like it did earlier lol....
~so i guess your right....I would like a middle ground for daily driving

u have to mess around with the VAF u din't have to advance the timing like the way u did it put back to normal before u f U* K it up.

Gottagofaster · Post by **Gottagofaster** » November 14th, 2006, 11:32 pm

haha i will do it...imediatly lol.....what am i going to f*ck up?
I searched for the write-up didn't really find anything i'll keep on looking...
you got any ideas?

Limegreen mx-3 · Post by **Limegreen mx-3** » November 14th, 2006, 11:41 pm

i'll be looking for the info to and will link u as soon as i find u. but i also tried was convert the rx-7 eletroanics and swap in the BP vaf eletronics. but u have to know what ur doing or i wouldn't advice u doing it.

Gottagofaster · Post by **Gottagofaster** » November 14th, 2006, 11:46 pm

OH so your saying i need to rip into my vaf's and put the electronics from my BP vaf into my Rx-7 vaf?
that would make a lot of sense

Gottagofaster · Post by **Gottagofaster** » November 15th, 2006, 12:39 am

ok well i put the timing back to what it was with My Bp vaf.....but i had the rx-7 vaf on there...i tried something out and this was truely amazing....using this vaf it shifted the power band to 5500 rpms to about 7000...which is really short but it pulls soooo hard there that I love it...i'm not sure this is good for my car....I wanna use this vaf correctly...I really need some help.....

torpedan · Post by **torpedan** » November 15th, 2006, 12:39 am

Limegreen mx-3 wrote:thats just the way performance is u can't have the best of both worlds. ur problay going to have to adjust it there is a write up on it but u'll have to find becasue i have to lookfor it too.

The VAF makes a diffrence over 3k, you just have to tune it.

Limegreen mx-3 wrote:i'll be looking for the info to and will link u as soon as i find u. but i also id was convert the rx-7 eletroanics and swap in the BP vaf eletronics. but u have to know what ur doing or i wouldn't advice u doing it.

This is a bit overkill, it will also be off and not really read correctly either.

Just to save everyone a bit of heartache and a littel bit of time there is an execent source of information for tuneing the VAF out there as is.

http://members.aol.com/solomiata/airflowmtr.html

Limegreen mx-3 · Post by **Limegreen mx-3** » November 15th, 2006, 12:50 am

Gottagofaster wrote:OH so your saying i need to rip into my vaf's and put the electronics from my BP vaf into my Rx-7 vaf?
that would make a lot of sense

I tried or apporch two different setups one i manage to get the RX-7 vaf to at least work ok with the BP and the other

I modified a another RX-7 vaf with BP vaf eletronics which in fact i got a 15.6@87 with that hybrid rx-7 vaf hauseing with the bp maf eltriicals.

Limegreen mx-3 · Post by **Limegreen mx-3** » November 15th, 2006, 1:03 am

torpedan wrote:

Limegreen mx-3 wrote: but i also tried was convert the rx-7 eletroanics and swap in the BP vaf eletronics. using the larger rx-7 vaf hausing .
This is a bit overkill, it will also be off and not really read correctly either.

considering form someone who has taken the time to mess around with the RX-7 VAF and at least had them working fairly ok. using the bp vaf compents in the RX-7 vaf hausing worked fine idled good but i did have to move that large gear to have it working like it should. so in esence it did not read correcly at first but nothing that a little bit of trinking can't help. once i got that taken care off never had issues ran a 15.6@87 with that hybrid rx-7/bp vaf.

Limegreen mx-3 · Post by **Limegreen mx-3** » November 15th, 2006, 1:08 am

yo here Gottagofaster found the link so read up and please mark the orginal setting before u modify the RX-7 vaf or u'll never have a starting point. happen to me once here the link

http://www.imazda.com/forums/showthread.php?t=38

so read up

torpedan · Post by **torpedan** » November 15th, 2006, 1:27 am

Limegreen mx-3 wrote:
torpedan wrote:

Limegreen mx-3 wrote: but i also tried was convert the rx-7 eletroanics and swap in the BP vaf eletronics. using the larger rx-7 vaf hausing .
This is a bit overkill, it will also be off and not really read correctly either.
considering form someone who has taken the time to mess around with the RX-7 VAF and at least had them working fairly ok. using the bp vaf compents in the RX-7 vaf hausing worked fine idled good but i did have to move that large gear to have it working like it should. so in esence it did not read correcly at first but nothing that a little bit of trinking can't help. once i got that taken care off never had issues ran a 15.6@87 with that hybrid rx-7/bp vaf.

So what your saying is that neither VAF's read correctly untill they are adjusted?

Limegreen mx-3 · Post by **Limegreen mx-3** » November 15th, 2006, 2:07 am

torpedan wrote:
Limegreen mx-3 wrote:
torpedan wrote:

This is a bit overkill, it will also be off and not really read correctly either.
considering form someone who has taken the time to mess around with the RX-7 VAF and at least had them working fairly ok. using the bp vaf compents in the RX-7 vaf hausing worked fine idled good but i did have to move that large gear to have it working like it should. so in esence it did not read correcly at first but nothing that a little bit of trinking can't help. once i got that taken care off never had issues ran a 15.6@87 with that hybrid rx-7/bp vaf.
So what your saying is that neither VAF's read correctly untill they are adjusted?

if the boot fits then u would know

Gottagofaster · Post by **Gottagofaster** » November 15th, 2006, 9:29 am

oh thanks a lot limegreen thats an awesome writeup...you can def feel hte 5hp pull