I just installed full RB and FCD-other than that my 87 T2 is stock. Sometimes it pops, but not necessarily when im being hard on it. One time it was a series of pops, and once was just 1--but this only happens when i am decelerating. Is this lean popping, or what??

 

I have a 1990 turbo rx7 with full rb and fcd and intake. i just bought a rx7 year ago.. i was going 240 km/h and the electrode in the spark plug broke off and inside the engine because it got too hot , there wasnt enough fuel to accomadte those mods. rewiring the fuel pump shouold help.. my rx7 was stock also.. time for you to get a fuel upgrade. as for me i learned the hardway i wish i knew bout this website earlier..

 

I planned on a walbro soon, should that do it?? also--my car definatley dosent get near as hot as it used to. maybe because my DP is wrapped??

 

Ya a walbro should do it. but you should think about rewiring it also. i learned how to rewire a fuel pump from this site.. theres a post somewhere. and if you get intake, be careful. you'll push past 10lbs. i had boost creep n engine went.. i ran 14 lbs cuz i didnt know what the hell i was doing. so anything after 10 lbs make sure you get injectors and a afc.. just remember fuel comes before anything else.. it be a good idea to get the wastegate ported if your pushing 10 lbs.

what did you wrap your downpipe with?? i was lookin for something like that..

 

every car will do this with a big exhaust. you are not going to hurt the car while decelerating. you run lean here anyways.

however, while under boost with those mods you are asking for trouble!! do you have a boost gauge? do you know what you are running?

 

My stock gauge hasn't read full yet which is 40 mm, or 7.7psi, so i dont think i am running enough boost to be lean yet, correct me if i am wrong. I ususlly hit about 35mm at the most.

 

what do u guys mean walbro? and how do i see if im getting a enough fuel? also how do i rewire the fuel pump?


pinfield

 

A walbro is a 255lph fuel pump--u need an A/F gauge to tell if you are running lean. u can find a fuel pump rewrite how-to at the tech section of www.1300cc.com

 

erm... the stock boost gauge is a POS... about as useful as the stock temp gauge, which basically has three modes... cold engine, ok engine and blown engine...

get a nice aftermarket boost gauge and an A/F meter is a good idea too

car runs cooler with wrapped DP eh? I'll have to try that...

 

DUDE GET OFF THE GAS!!!! the stock boost gauge will never get to the top because the FCD limits the boost the ecu sees. that's the point of it.

stay off the gas and get a real boost gauge. you are going to blow your engine. many have. A fuel pump alone is probably not enough for a full intake and RB exhaust. First find out how much boost you are running. but don't go over 10psi!!

 

I am about to cry! If you going to throw money at a car to make it faster, please find someone smarter or who has done it before.

I am in Syracuse NY, if you need someone to mod/upgrade you rx safely let me know.

I have seen a few fc turbos at my shop where money was dump on them to go faster. It will only last for a short time unless done right, then you spending or selling!

 

My stock boostgauge goes to the very top and covers up the plus sign on the top there with the number next to it.... how much boost is that about????

 

I wouldn't trust the stock gauge. it also depends on year. 89-91 gauges go higher the 87,88. also like I said before if you have a FCD your readings are not correct anyways.

 

I am not sure how many times people on this forum can stress this. THE STOCK BOOST GAUGE IS ****. Before you do ANY mods buy yourself an air/fuel gauge, and a real boost gauge. Why not position yourself on the side of safety, the couple hundred bucks it might cost you to buy those gauges is nothing compared to the cost of a rebuild. Lets be smart people.

 

alright guys, there is very good advice on this forum so I'll heed it. my next mod will be a a/f gauge and boost gauge.. yeah I dont know how much boost im running, and i do have a fcd of course, so my stock gauge readings dont mean anything I guess. =)

 

aww ****--i knew i was living on the edge but i did not know my stock boost gauge was that big of a POS--looks like a boost gauge and POV maybe for me.

 

could I forget about the fuel system for now, and get a popoff valve and set my boost limit to 9 or so psi?? would this take care of the danger? I know I will have to do the fuel sometime, but wouldnt the POV make my car safe by limiting the boost from entering the "danger zone"??

 

Also i was told that if i was running lean i would know it--as in like a sudden power loss--is this just for n/a's or have i just not hit that point?? Also--my car can shoot flames, wouldnt that mean i was more on the rich side than the lean??

 

Going to have to get myself a boost gauge and also a Walbro myself (I just did the same mods as dcamcoTII) , how easy are the Walbros for a relative mechanical moron to install? - I have little knowledge but I follow directions well

I saw this pump over at rx7.com that replaces the stock pump exactly, this might be a good buy if I can save $ by installing it myself.

The owner of the shop that did the exhaust already suggested the boost guage, I will probably ask him to set it up as soon as he has time.

 

Um no. I dont mean to sound like a dick, but quit avoiding the correct fix, youll pay in the end. A walbro fuel pump wont set you back a but a few bucks, and cant be too much more than a POV. Find the best deal you can on the pump, and present it to Jason at the Rx7 store. Thats what I did, and I got my pump for 130 bucks, and it was easy to install. I also hard wired my pump, with 8 guage wire you can hear it screaming in the hatch. If you dont have guages, I suggest you get those also. An Autometer boost guage, A/F guage, and dual pod holder set me back about 120 bucks at the Rx7 store. I found the cheapest price, and presented it, and it was honored. The only discount I got was on the Boost guage, because Jasons prices were better. All this **** is easy to install, just plan on using a day to do it.

 

no running lean will give you more power. untill it goes pop.

flames mean you are running rich at that moment of when you let off the gas. doesn't mean you are running rich at 6k rpm at 10psi. which you are not.