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supercharged 306 possibly running rich

5.8K views 22 replies 8 participants last post by  flattusmaximus78  
#1 ·
hey guys its been since may 2008 since my last confesion..lol

anyhow, i got a 87 mustang lx now.

vortech supercharger s-trim 8psi
edelbrok performer rpm aluminum heads
edelbrok upper and lower with spacer
65mm TB spacer edelbrok
65mm TB bbk
95mm lightning maf
forged internals .30 over to a 306
42lb injectors


actually got a couple questions.... what timing should i be running? currently went from 12* to 8* and seems to be doing better. other question is i think im running way to rich. i can see the white smoke when i stomp on it and i can smell it. i havent physically checked the pressure yet which i will by this weekend to find out where im standing on.
Im no pro but i would think my solution would be to boost more, maybe around 12-15psi. The pulley size 2.87 should bring me right to around that psi i would think and lean me out a bit to match my injector output. as for what I've been reading they 42lb injectors are mainly for cars 400-460 even 500hp range or even higher. if i can skip a tune i would dont want to spend all that money when i can just simply boost more maybe change the crank pulley and check my fuel pressure from there and call it a day. I need some second opinions on this. possibly other setups and how it works out for you. if you have the same setup as me tell me what I'm possibly doing wrong. i've been also thinking of putting my timing to 5* as i heard in other forums that it works -1* per every psi you boost. Not sure how true this is but seems the lower i go the better it runs just want to be safe and now sorry so left it at 8* for now. Let me know guys. Thanks
 
#7 ·
thanks for the suggestions....
I already have the car tuned by fordspeedracing in clearwater,fl. it has the chip and all. he had to tune it in order to install the new maf, injectors and computer. i set my base timing at 8deg seems to be doing alot better. had it set to 12deg which wants to bog at top end. I heard the FMU's were junk its just forcing more fuel pressure. I dont need that i have the 42lb injectors and have plenty of fuel. I didnt mean to say i wanted to skip a tune I already have one its just that i need to lean it out some and also have the right timing set which would put me right on the spot.
 
#10 ·
+1 I am going to say take it to another tuner, your car should not have left the other one in that condition, I don't know if they had it right and you tried playing with something and got it goofed up or if they left you like that, but if they did, DEFINATELY find another place to tune your car, A boosted car, without a good tune is just waiting to come apart on you, I know its not cheap to get a good tune, but think how much its going to cost when that thing comes apart and you have to start all over! Throwing more boost on it is just a recipe for disaster in my opinion...
 
#11 ·
ok i'll try that. i think i would have to agree with the bad tuning. the car was still bogging around 5krpm when i got it he said it should be good i dont understand why he would leave it that way. charged me $1600 to get the maf, injectors and computer in along with the tune and a dyno that i never got graphs for. he told me i was running 350 somthing at 3500rpm but couldnt tell me facts or even a sheet to go with it. its bs if you ask me. car seems to be doing alot better now at 8* he never even touched the timing on it which is why i think it was a crappy tune to begin with. I'll find another tuner. i also called him and he said maybe we can try something else and i really dont know what he means by this by something else why couldnt it be done right the first time. i think he's more worried about his 6 sec mustang then his own customers. i always see the same cars at the shop getting worked on too.
 
#13 ·
I wish it were that easy bro...haha...hey what setup are you running on yours.. i see your running 14.47 @96mph and 12psi boost. looks like you got the stock intake from the picture. I ran a 13.9 @ 104 last thursday before i tore up my input shaft on the tranny. Come to find out the guy who had it before me put a 4 banger tranny on it and i didnt even know it until it came down to rebuilding the thing. Never the less had to get a new tranny but i dont regret it. T-5 with fordracing rebuilt kit and hardend gears.
 
#15 ·
maybe even just 30lbs would have been suffice but the tuner told me i had to run the 42lbs for some reason. I guess cause of all the bolt on i have and assuming that i was going to go back sooner then later to get another tune to boost more which was my plan to begin with but if he couldnt get it right the first time why would he get it right the second time.
off subject.. what kind of wheels are those that you got on your stang. looks almost like the ROH Z06 wheels i have on mine.
 
#16 ·
They say A.R.E on the center caps. They were on there when i got the car back in 1998. They are so beat up thay have missing clear coat and alot of curb rash. Its time to change them out. trying to save some money
 
#19 ·
yea thinking of getting retuned again soon. im only boosting 8lbs but either way yes your right i should be running 110mph and mid to high 11's at the qtr mile. im hurting on my 60ft times because of traction but soon this will change. planning on getting some cheap 10hole wheels and slapping some slicks on them for the track. i also just got a new trans i had the 4cyl trans before and noticed they were shorter then the 8cyl t-5 so i'll probably be going again soon right after my tune. for now im just taking it easy.
 
#22 ·
The tuner did a compression test and it was good. dont think i have any problems there. just talked to him yesterday too and he said my retard is built into my program so i should be good there. i do need to buy a fuel pressure regulator though it might just work out better for me that way. reason why i thought i was running rich is cause i can smell it real bad. my wife everytime she drives behind me she says everytime i stomp on it blows white smoke from the exhaust. my boss told me the same. also when i go to the track i cant put the pedal through the radiator have to go half way if not it bogs at around 5k rpm and struggles to get to 5500rpm. my base timing was set at 10deg but when i put it on 8deg seems to do alot better and can power shift at around 5500 or 6000rpm if not a little more sometimes if its cool. i got 42lb injectors too that could also have a factor with my setup and im only boosting 8psi. maybe if i boosted more like around 12-15 give or take maybe the injectors i have would not be so much. i know alot of guys with my same setup running 30lbs and they run perfect at 8psi - 10psi of boost. i'm planning on boosting more in a couple weeks either way so once i do i'll get it re-tuned again and go from there. I will also buy the fuel pressure reg so that they can adjust fuel for the tune also. I dont know how i got tuned without it but my tuner told me i didnt need to get a regulator that the stock one was suffice. we'll see what happens in a couple weeks.
 
#23 ·
You could have 60lbers on the same low 8psi, it's all accounted for in the tune. Your not using boost to lean it out. The tuner uses his skills that you paid him for to do so in the tune, which he didn't clearly. You have a good plan so stick with it. White smoke is usually completely unburnt gas coming out almost as liquid through the tail pipes. Coolant comes out white as well, but you should be able to tell the difference. If it's gas it will straight reek.