94gtmax50

i have my car at the tuning shop and he said i should of put a 65mm tb instead of a 70mm . he also said the 70mm is harder to tune the car with and i have all these things done to the are and the car has been at the shop for a week . is it that are to tune a 94 model. he is burning a chip for me . the chip is a superchip .


i bought a 302 bored over.040 to a 308 9.8:1 it has :
all forged interenals piston, i beams, rods.

- heads specs -

trick flow twisted wedged heads #51400002

61 cc combustion chamber

2.02 intake valve

1.60 exhaust valve

high rate valve spring 7,degrees lock manganese broze guides.

trick flow 1.6 roller rockers

--cam specs --

brand new trick flow track heat cam # 51402000

lift : 499 in intake / .510 in exhaust

duration : 275 intake / 2.79 exhaust

lobe separation : 112 degress


--add on to the engine--

cobra upper and lower intake manifold

bbk long tube headers

70mm throttle body edelbrock

75mm mass air pro-m

30lb injectors calibratred

255 fuel pump

bbk fuel pressure regualtor

i cant get it running right it has bad idle the air /fuel mixture is off and it dies out when coming to a stop .

7upedition

your TB should be the same size as the inlet to your intake manifold in theory otherwise you create resistance, as far as tunign goes i have no idea... sorry

mpswirl

Sounds like your tuner doesnt know what hes doing and hes taking it out on a 75mm throttle body. I MIGHT of believed he knew what he was talking about if he said the 30lb injectors were a little big. If hes programming the chip that combo sounds ok although i dont see why you would need a chip with that combo.

94gtmax50

the car has a rough idle and it is running to lean the header and cats get red after awhile at opert temp. i dont know what is going on with the car .

mpswirl

just a question, how do u know its running lean?

94gtmax50

when the header and cats are getting red

mpswirl

There is no way that with your set up that engine should be running lean naturally aspirated. You have 30lb injectors on a 308 for god sakes and a 255lph fuel pump with afp regulator. Your tuner should know to check fuel presuure and air fuel ratios when tuning a car properly. Make sure your timing is ok, and check those other 2 things i mentioned.

94gtmax50

what should the pressure be at

Mustangkiler

70 mm sounds perfect for those heads and cam, hell the street heat intake if thats what u got i think has a 70 mm opening to it if not bigger

Katmandu

You'll get ALOT better throttle response and driveability with a 65mm TB!

70mm and 30lb injectors are a bit to big IMHO.