Need help fast!! Heads!!

[UnderPressureGT]

Well i just popped my headgaskets running 12 lbs of boost.... i am going to pulley it back to 9 when it was allright...

If im gonna rip the wholew top end apart anyways, i feel that if them heads are off, itll be stupid not to buy different heads.... I would want to use the stock valves for the low end torque, but much better flowing heads.... two machine shops told me that i would keep popping headgaskets because my compression isnt for a blower.......

wouldnt you think that a better flowing head would in fact LOWER the compression of the motor??? would i hurt my bottom end or headgaskets????? what do you guys think??? my dad wants to put my stock heads back on because my bottom end is stock with 115K miles on it and think that ill either blow more gaskets orrrr my bottom end.... im probably gonna show my dad this thread sooo your best advice would be great!!!!

 

[IndyBlk5.0]

I bet you your bottom end will take more abuse than you give it credit for. You are planning on running less HP than most people running h/c/i and boost. Don't worry about your bottem end until you are beating on it with about 450rwhp. For the heads. I recommend TFS TW's. Reason being is that when you do decide to upgrade your bottem end, use the TFS heads agian. Get a custom grind... And for gods sake, get rid of SD. You basically found the limits of your SD system when you lit your head gaskets up. Your out of fuel.

 

[UnderPressureGT]

i wont run into problems switching heads./.. its the cam i gotta worry about........ i wanna keep a smaller sized valve soo i dont need to dot he cam right now..... someone showed me a set of GT40Y heads real cheap online.... their alumin and have a 1.94 1.54 valves... those are the heads i am set on... this is the only thing thats holding me back because he is believing what a machoine shop is telling him rather then this huge mustang place in NJ telling me i can do it...

Edit: i deffinately didnt run out of fuel.. look at that guy DAGGAR on this forum.. he is running much more of a rad combo then me and he is sitll using his 24's.. only he is using a kenne bell boost-a-pump and has a wideband to moniter his air fuel........ i am going to buy the wideband and the boosta-pump to see if i can get a good air fuel reading.. if worse comes to worse and i cant do it, ill upgrade to mass air and bigger injectors and be done... at LEAST ill have the wideband to tell me if im running lean or not... also i wont dare step up the boost to 12 again.. ill keep it at 9 and will probably lose alittle with the enw heads...

here is his combo
86 GT w/ stock short block. Twisted Wedge Heads / Bassani exhaust / DF Centerforce / 1.6 rockers / E-303 / SPEED DENSITY!!! (+30 HP) / March Ram Air / K&N / FMS alum DS / 24 lb/hr injectors / adjustable FMU / Kenne Bell Blowzilla / 2 1/2 in unducted cowl / Superduty T-5 / Tri-Ax Shifter / Innovative LM-1 WB02 / and no 5.0 Badges *wink*

the reason i blew my gaskets is bc i didnt have a clue what i was doing and guessing my air fuel ratio... that is why i am buying the wideband.. im gonna do it right...

 

[IndyBlk5.0]

What do you mean you didn't run out of fuel? You lit your head gaskets up. What from? I bet you it was from detonation and being lean.

 

[Daggar]

I think you two have a difference when it comes to the meaning of "running out of fuel". I definitely believe that you were running lean up top GT. I don't think you've reached the limit of SD but I DO think that you were no where near an ideal tune.

 

[Blk91stang]

What is your current compression ratio? Mine is 10:1 and running 10lbs of boost and I have no problems except I have a custom chip which gets rid of the FMU and retards the timing under boost. Do yourself a favor and get 42# injectors and a chip burned for your combo. Running 12#'s of boost and not knowing what your dealing with is a disaster waiting to happen... you're lucky only your headgaskets went...

 

[UnderPressureGT]

i am going to set the boost back to 9... probably 7-8 with the heads it will fall to..... i have a vortech timing retard waiting to go on when it gets fixed anda vortech fmu.. i dont think i will jump it to 12pounds of boost for a while!!!