engine swap stock to 306

hrdroc · Apr 21, 2008

Hello its been a while since I been on here but Im back....So anyway Ive change my mustang. Now it has a 306, AFR 205cc heads ported and polished, X303 cam ,75mm throtle body, 24lb injectors, afm power pipe, msd 6al, msd distributor,80mm mass air for 24lb injectors,and victor jr spyda probe intake. So give some intake on what Ive done and what u think.... Thanks

GTOreturns · Apr 21, 2008

Any dyno #'s or track X's ?

Foxfan88 · Apr 21, 2008

what rpm are you turning the engine? 205s are some pretty big heads for a such a small motor (306)

mustangfan1990 · Apr 21, 2008

yeah you only have 24s pushing those AFR 205s those heads are WAY TO BIG for that engine...youll never reach the potential of those heads with a 306

5.0ina66 · Apr 21, 2008

I was gonna say, is it just me, or is that motor a clusterfook? Guess it ain't just me Port velocity > that combo. Heck, cam selection > that combo And how in the sam hill do you port CNC'ed race heads? Sure there's a little left in them, but people who would do that don't care what it costs, or don't mind paying...I somehow get the feeling that ain't the case here

bynummustang · Apr 21, 2008

The heads sound a little out of place mang.

BlownFiveLiter · Apr 22, 2008

I could see using those heads on a forced induction application with a 306, but It wouldn't be on a stock block. To take advantage of the 205cc intake ports, that thing would need to move a lot of air.

5spd GT · Apr 22, 2008

Sounds suspicious...

It is a mismatched combination. How many RPM are you pulling?

DMAN302 · Apr 22, 2008

That is not going to be a fun car at all...cam is very wrong for the intake and heads IMO.......heads are oversized for CI's and injectors will likely be fine since I cant see it making very good power at all.

GTOreturns · Apr 22, 2008

Smells like ?

hrdroc · Apr 22, 2008

I bought the motor the way it sit. I got it in the car and all hooked up and I gotta say it is real strong. I dont agree with the cam myself I'd rather have a custom ground cam. I guy I bought it from was going to put on a supercharger or spray 200-250 shot of nos. So somebody give me some things that i need to do...Also the rocker arms stagger 1.6 on intake and 1.72 on exhaust......

ninety15.0 · Apr 23, 2008

good lord what a mess. I would say rip the heads off and sell them for what ever you can get for them and buy some AFR 165s. Those heads are far too big. A 306 just doesnt have the breath to run those heads. I bet that thing doesnt come alive until 4500 rpm.

i would sell the heads to be honest with you. Whats the purpose of the car? is it a street car of any kind? if yes...sell the heads. get something more street friendly. and then get a custom cam.

I dont even know what a vic jr, spyder, probe intake?????

hrdroc · Apr 23, 2008

I thank you all for the info and your opinion on what i got. Im goona take to the track soon and see what somes about it. The rpm of this motor is rite at 7900rpm shift point. I guess we will see what it does thanks.By the a victor jr intake is the intake that is made for fuel injection. It looks its made for a 4bbl carb....

hrdroc · Apr 26, 2008

okay I took the car to the track and these are the results first pass leaving at 6500rpm 60 ft time 1.52 1/8 mile 7.45 92mph. Not bad for of you who thinks this is a complete mess up.....Second pass 1.50 60ft 1/8 mile 7.42 93 mph.... So please tell me ur thoughts now...Shifting at 6800rpm

5spd GT · Apr 26, 2008

Looks solid, but you could do better...

Keep it up.

MAC'n89Blckstng · Apr 26, 2008

I would say 165's would be better but who knows. My buddy has 185's on his 327 stroker.

hrdroc · Apr 27, 2008

Im gonna put a 200 shot of NOS on the car. The engine has a 9.5:1 compression ratio....

hrdroc · Apr 29, 2008

okay im taking the x cam out and putting in a custom ground and ill give u the results from that...

82CapriRS · Apr 29, 2008

why not go higher on compression? then you would have more power n/a an could still run pump gas. i agree with the heads bein to big. maybe 185s at most. from what i gathered you wouldnt see the potential of those heads unless your pushin a decent amount of boost or high revs, like 8k rpms an higher. just my 2 cents. i would do 185s, nice cam around 560lift with 1.6 rr, an put compression between 10- 10.5 max. still run pump gas an have more fun when you dont spray.

bloopbloob · Apr 29, 2008

something doesn't sound right about all this! heads seem like way too much for a n/a 306 from everything i've seen over the years, but yet you're cutting some of the sickest 60ft's i've ever seen posted on here????.......

engine swap stock to 306

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