Caps Maf Riser Mod

[shiny]

Just fitted the riser and yellow injectors
starts and idles ok just need to take it on a run now.


Anyone else running this mod?

[shnazzle]

Just fitted the riser and yellow injectors
starts and idles ok just need to take it on a run now.


Anyone else running this mod?

I'm very interested in this. My only worry is not being able to get 98-99 fuel all the time. Could keep a bottle of octane booster in the car at all times I suppose.
Let us know what gains you feel and if your mpg takes a beating

[Anonymous]

Octane boosters are no good, the best ones bearly give 1 octane increase

[shnazzle]

Octane boosters are no good, the best ones bearly give 1 octane increase

Hmm that's pretty useless. Never used them before. So basically you'd have to plan your journeys carefully

[shiny]

I fill up with super-unleaded 98 octane anyway every garage has that down here.
As for miles I do around 50-100 dry miles a month,second car so m.p.g is not an issue,
should keep the oil rings free from sticking?
I will update on any gains.

No other members running this mod?

[Anonymous]

Never heard of it but interested! What's the idea

[AndyM]

It's a trick to try and gain a bit of torque and throttle response.

It's a bit technical but this is my understanding...

Essentially you move the MAF into the middle of the airflow (the stock setup is low) which tricks the ECU into advancing the timing. You use the 2zz injectors to compensate for the changed MAF readings for the fuel mix. And, I think, the high octane fuel helps when the timing is moved on and prevents knock.

The end result isn't any real power changes, but a bit more torque.

Best bet is to have a read over on spyderchat as there are two or three really excellent, in-depth threads about it.

I was considering it for mine but from what I've read it works best 'tricking' a stock setup - i.e. with the stock airbox (which has the lower MAF position and the vanes that you remove) and the stock ECU.

As I'm very soon to be going with my induction kit (with the MAF basically in the centre) and mapped I don't think I'll see significant changes as the torque curve can be tweaked directly. May look into injectors though and see what's possible.

Also, I spoke with a guy who's done it on his and he said he really felt the difference on road (where you are in and out of the rev ranges) but that on track days he felt less impact as you're at the top end a lot more (at which point everything is 'on' anyway).

[1979scotte]

Octane boosters are no good, the best ones bearly give 1 octane increase

Hmm that's pretty useless. Never used them before. So basically you'd have to plan your journeys carefully

Don't all petrol stations to super unleaded now?
Tesco Excellium
Shell Nitro Vpower
Bp Ultimate
etc etc
My turbo only runs on high octane petrol.

[stupink]

I've found octane boosters good at preventing det (irrelevant of whether or not they boost octane much)..  so if you were suffering with det due to poor fuel, it would definitely be a good idea to add one imo.

[shiny]

Fantastic results for a few pounds much more torque right through the range,more responsive and still pulling after 4k.

[Micha]

The fact of the decentering flowmeter as I understand it.
Rising the MAF lies the computer about the intake air quantity. Indeed, the speed of air on the walls approaches zero and rises (not linearly) at its maximum at the center of the tube. Approaching the flowmeter to the wall, the flow reading is less than the reality. The computer thus controls lower injector opening duration. This is why a 310cc injector can work in stoichiometry. The AFR signal communicates to the calculator the AFR values and tells him if he is doing right or not. Thus ECU can learn small differences in injection mass (production dispersion or simply injector aging effect).

The trick is in finding the right position for the MAF.

In what concerns ignition... ignition MAP depends also on speed and load (which includes air flow). As the computer sees less load compared to reality, it commands higher ignition advance. That adds more power and responsiveness.
The thing is not to lie the ECU too much and have knock.

[Anonymous]

Thanks for the info guys...but I won't be doing it to mine

[shiny]

Thanks for the info guys...but I won't be doing it to mine

Why? Just interested in your thoughts.

[Anonymous]

I don't really like mods which "trick" the engine into changing the air/fuel mixture, and there is a comment above that for a track car it isn't noticeable due to driving at high revs; so for that..."I'm out"

[shiny]

I don't really like mods which "trick" the engine into changing the air/fuel mixture, and there is a comment above that for a track car it isn't noticeable due to driving at high revs; so for that..."I'm out"

Yes I can understand when you are set up for racing/track, as for a road car it is
a noticeable cheap mod  s:D s:D

The engine appears to be running a lot sweeter at low and high revs now too  s:D s:D  .

[Micha]

Thanks for the info guys...but I won't be doing it to mine

+1
I prefer Power FC or AEM or similar.

[keljon]

If you mean AEM FIC then pointless unless going FI as you can only retard timing not advance it

[Micha]

If you mean AEM FIC then pointless unless going FI as you can only retard timing not advance it

I am speaking about standalone solutions

[shnazzle]

reviving this thread as a current private sales thread has got me thinking about this again.

Specifically in combination with the emanage Blue and the map I have.

Initial thoughts are:
1) Raise MAF, change to yellow injectors, remove intake veins, leave emanage as-is. Logic being, the emanage is based on stock, and the MAF mod is built to trick stock. So, logic tells me that it will trick the emanage  s:) s:)

2) Raise MAF, change to yellow injectors, remove intake veins, keep eManage map, but put in compensation for injector change which will cascade across maps. Logic here is a bit more complicated; It assumes that the eManage really only kicks in on WOT and in open loop. So that's WOT 4000+ rpm. The map at that point already expects more fuel/air, so it might work out. Under 4000rpm and WOT it runs off the stock ECU basically, so then the usual effect of the MAF mod takes place.

3) Raise MAF, change injectors, remove intake veins and have eManage remapped for this setup. This is obviously very costly, and frankly playing around with just the capabiltiies of the eManage will give me better results. (thinking VTEC input mod to force into open loop).

[Anonymous]

reviving this thread as a current private sales thread has got me thinking about this again.

Specifically in combination with the emanage Blue and the map I have.

Initial thoughts are:
1) Raise MAF, change to yellow injectors, remove intake veins, leave emanage as-is. Logic being, the emanage is based on stock, and the MAF mod is built to trick stock. So, logic tells me that it will trick the emanage  s:) s:)

2) Raise MAF, change to yellow injectors, remove intake veins, keep eManage map, but put in compensation for injector change which will cascade across maps. Logic here is a bit more complicated; It assumes that the eManage really only kicks in on WOT and in open loop. So that's WOT 4000+ rpm. The map at that point already expects more fuel/air, so it might work out. Under 4000rpm and WOT it runs off the stock ECU basically, so then the usual effect of the MAF mod takes place.

3) Raise MAF, change injectors, remove intake veins and have eManage remapped for this setup. This is obviously very costly, and frankly playing around with just the capabiltiies of the eManage will give me better results. (thinking VTEC input mod to force into open loop).

With emanage just fit injectors and remap. The riser is just to make the system think more air went in

[jvanzyl]

Not sure if it's appropriate to ask- but given the current state of the private dashes section, does anyone have any thoughts on buying yellow injectors second hand? Any pitfalls? Is it better just to buy new?

[shnazzle]

reviving this thread as a current private sales thread has got me thinking about this again.

Specifically in combination with the emanage Blue and the map I have.

Initial thoughts are:
1) Raise MAF, change to yellow injectors, remove intake veins, leave emanage as-is. Logic being, the emanage is based on stock, and the MAF mod is built to trick stock. So, logic tells me that it will trick the emanage  s:) s:)

2) Raise MAF, change to yellow injectors, remove intake veins, keep eManage map, but put in compensation for injector change which will cascade across maps. Logic here is a bit more complicated; It assumes that the eManage really only kicks in on WOT and in open loop. So that's WOT 4000+ rpm. The map at that point already expects more fuel/air, so it might work out. Under 4000rpm and WOT it runs off the stock ECU basically, so then the usual effect of the MAF mod takes place.

3) Raise MAF, change injectors, remove intake veins and have eManage remapped for this setup. This is obviously very costly, and frankly playing around with just the capabiltiies of the eManage will give me better results. (thinking VTEC input mod to force into open loop).

With emanage just fit injectors and remap. The riser is just to make the system think more air went in

That clears that up! So really it should be possible to incorporate the MAF mod into the map.
But I remember you saying that you tried the whole bigger injectors thing and it just didn't work out with piggyback. Need PFC or Ultimate. Right?

Not sure if it's appropriate to ask- but given the current state of the private dashes section, does anyone have any thoughts on buying yellow injectors second hand? Any pitfalls? Is it better just to buy new?

Nothing wrong with buying 2nd hand, but it would be worth having them cleaned. Chances are they'll be alright, but you don;t know what happened after they were removed.

[jvanzyl]

Over all it sounds like a nice Mod to do - I think I just need to be very sure on the injectors side of things. Thanks for the background!

[hiace82]

Good reason to think about the state of injectors. I had mine delivered refurbished mid last year (AUSinjection through Amazon - wasn't too sure about that source but they worked a charm). Not sure if it's decent to chime in here with an ongoing sale but with works for my rebuild having started, the set of injectors I'm putting up for sale has been only removed yesterday by my garage.

Would be glad if someone could advise me on how to store/ship them as safely as possible in case someone wants them.

[Anonymous]

If shipping insulate as well as lots of padding.

On the injectors with emanage it will be fine as you tell the ecu the size and it will adjust the timings on the injectors to keep the quantity of cc's to the same.

As for things that need standalone ecu if stage 2 + cams as they take the overlap past what the stock ecu can cope with.