You are currently viewing our forum as a guest, which gives you limited access
to view most discussions and access our other features. By joining our community, at no cost, you will have access to start new topics, reply to conversations, privately message other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join RX7Club.com today!
after reading both your posts and a few others to this point the lightbulb finally clicked ON. so instead of tuning to some mix afr number i just tune to what i like on the knock and egt and i will find the number resembles pretty closely the afr i ran on pump. it is good by 9s and 10s. at least i know my ignition will fire just about anything.
i am embarassed about this as much as i am looking forward to leaning it out.
again, thanks for hammering on this important point.
I go out of my mind somtimes trying to explane something that is so simple to customers when Tuning there cars.. thay seem to have some comlicated throrts that tells them that you can not tune an engine running Methanol or any other fuel exept pump fuel with a A/F meter that does not display Lamda..
It does not change... 1 lambda = 14.7:1 AFR petrol and thats it!! its the stoich point of the fuel you are running that changes.
You can not tune an engine running Methanol or any other fuel exept pump fuel with a A/F meter that does not display Lamda..
Stuie
RX Performance
The ones that normally make those claims are the ones that have not tried it or come to terms with the concept of 'lambda vs afr's'.
Sometimes it is true that the same lambda used to make safe power on regular fuel might be a little different for what's needed on methanol but that depends on application. It's all based on tuning experiences with the said combination and all the same rules most must be applied during a tuning session.
__________________
CRISPEED Rx-7 9.204@150.47
TRAVIESO RACING Rx-3 10.04@130.86mph ALL MOTOR
AWD MOTORSPORTS 8.75@163EVO8 GSR E85
AD TURBO 2JZ S2000 8.69@163 E85
CHARLES/RAW 2JZ S2000 8.7213@157
BIG DADDY PERFORMANCE SUPRA's MKIII 8.70@170/MKIV 7.95@180
if running methanol 20%, or in that neighborhood, you will likely find approx 4 degrees less timing v racegas will get you where you want to be.
AFRs will vary from car to car and to your risk tolerance but low to mid 11s should work for most.
re post 7
methanol will not damage your O2 sensor. generally lead is the culprit which does not exist in pump gas or methanol. i run my O2 sensor all the time and do not use the narrow band sensor.
hey guys well im planning on getting the AEM 50:50 BUT my question is can i make this work with my stock ecu? do i just simply boost more till my afr is back to the way it was? i have a 1988 T2 with gslse 680injectors on the secondary's boosting 14psi my afr on my wide band is 10.7-11.5. stock intercooler stock turbo stock ecu. can this w/m kit work?
i was simply thinking of setting the system to activate at 14psi (when my afr is good) then boost more when the kit is activated until i reach the 10.7 - 11.5 afr again. sort of new to this
hey guys well im planning on getting the AEM 50:50 BUT my question is can i make this work with my stock ecu?
Yes but not in the way you're imagining.
Quote:
Originally Posted by swkiller
do i just simply boost more till my afr is back to the way it was?
No, not a good idea.
Quote:
Originally Posted by swkiller
i have a 1988 T2 with gslse 680injectors on the secondary's boosting 14psi my afr on my wide band is 10.7-11.5. stock intercooler stock turbo stock ecu. can this w/m kit work?
Yes the kit will absolutely work.
Quote:
Originally Posted by swkiller
i was simply thinking of setting the system to activate at 14psi (when my afr is good) then boost more when the kit is activated until i reach the 10.7 - 11.5 afr again. sort of new to this
First - 14psi on the stock HT-18 is very much shortening its life span. Power won't increase much above 12psi as I've seen on the dyno, so by running 14 you're mostly just killing the turbo without much gain in the power department.
Next, you need the ability to tune the fuel if you plan on using methanol (or at least, very much of it) and for your purposes an SAFC would work fine. You also have the option of running straight water which won't richen your AFR's but will provide some cooling and knock protection. The best setup on a stock turbo FC would be to run a small pre compressor nozzle and a larger aft nozzle. There's alot of neat things that happen when you inject before the compression of the intake charge.
Quote:
Originally Posted by swkiller
also will my stock turbo be able to withstand more boost with the kit?
No. The limitations of the stock turbo are purely mechanical. Adding chemical intercooling to the equation just makes it better for the engine - not easier on the turbo. As I mentioned 14psi is stretching the limits of getting a reasonable lifespan out of the turbo, spraying meth won't make its bearings hold together
__________________
The only way to apex a corner is with apex seals under the hood!!
"These four wheels feel like home to me.......they breathe" - Flatliners, This Respirator
Thanks alot for the answers really helpful, i really dont have an option with what im boosting, since i dont have much control of fuel i compensate with the boost, i think id be running to rich for 12psi. plus i still got the original turbo as a spare just incase, i swapped in the 91 turbo(got it for free with exhaust maifold)also got an msd 6a dont kno if that helps out im guessing it should in the power stroke.
So you are saying to spray just water pre turbo then pre intake manifold? or with 50:50 . Also how much HP you think this might give me?with water and with 50:50 (if i keep boosting the same)
^It won't change HP much. You will however see benefits in cooling and knock prevention. Stop playing games with boost and no fuel control. You NEED fuel control at the very least!
__________________
Johnson
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. RIP 1/16/10
89 Jeep Comanche - Goes where the 7 can't
)
)
Linear Mode
