[K7cobra]

im thinking about doing a motor swap on my cobra im not sure what motor i want to go with for 4 grand i can get a brand new 04 cobra motor from ford. but im not to sure if it will fit or what i will have to change in my car to make it fit. or should i go the N/A root and build my motor to achaive 750 rwh. i have the money i just dont know what i want to do

[DickH]

How much do you have to spend? with a 98 cobra you already have an amazing block and rods. You should swap out rods and pistons, and look into a turbo or something.

[K7cobra]

im looking to spend about 6grand over the course of the winter right know my motor has 82k on it im going to keep the 5 speed and change the clutch to a twin disk clutch. i have 2 ford 9in rear ends with 4.10s and a nother one with 3.73s so im looking to spend on motor. im just having a hard time deciding what to do. ether way i want to make 750 or more at the wheels

[DickH]

Yeah best bet would be to do a turbo on your motor. With forged pistons/rods, and a nice turbo, you should be able to hit that.

[K7cobra]

the only thing im worried about is my cobra being street able im the only one that drives it but still. most of the experience with doing performance builds is with superchargers such as procharger and kennybell. turbos would be something different its good food for thought

[DickH]

should be fine with a turbo on the street, its not like its always boosting like a supercharger.

[K7cobra]

ok what are your toughts about twin turbos

[manolith]

6 grand is not enough for 750whp... you will need at least 2500 bucks for a transmission a clutch alone.. you need to bullet proof the bottom end and more than probably do some head work to take advantage of masive boost. so if you do everything your self thats about 6500bucks and you still need a turbo or blower. turbo might be cheaper. but still about 5 to 6 grand.. on the turbo setup and still need another grand for fuel setup plus rear end needs to be beefed up...at least it will take about 1200bucks for the rear if you want to take advantage of that power.

sorry i didnt see that you had 9 inch rears.. never mind the rear then.. still need a transmission and clutch.

[K7cobra]

good thing i all ready have the twin disk racing clutch and i build tranny lol sorry dident add that and 6 will only be a start in total ill spend about i dont have a set limit race ill do everthing my self from boring the motor to grinding a crank and i dont pay sales taxs other then that ill bend my own tubing for the turbos so that takes away from a kit ill get evey thing done just looking for ideas

[manolith]

Originally Posted by K7cobra good thing i all ready have the twin disk racing clutch and i build tranny lol sorry dident add that and 6 will only be a start in total ill spend about i dont have a set limit race ill do everthing my self from boring the motor to grinding a crank and i dont pay sales taxs other then that ill bend my own tubing for the turbos so that takes away from a kit ill get evey thing done just looking for ideas

cool.. what transmission do you have?

[86er]

forge the rotating assembly and machine work 3000 ish for good guts and machine work, then get you one of the new mmr sheet metal intakes, 1200 and throw a fogger kit of say 250-300 on a 10:1 motor and you have the best of both worlds, good street power, but when you wanna dick slap someone turn the juice on and bam there you got

[manolith]

yeah you will never go wrong with juice..i think that anything over a 250shot is not as reliable as a turbo even on a forged motor.. nitrous can be a sneaky mofo. but if the fuel is right and all the safety features are good it should be fine.. direct port multy stage setup. 175 plust a 125 for second stage.

[K7cobra]

[QUOTE=manolith;3017649]cool.. what transmission do you have?[/QUOT

its a toss up i have a built toploader i took out of my torino and i have a built t5 that a customer never paid for i much perfer the 5 speed. and i love the twin disk clutch systems. i do like using spray i had it on my camaro the only problem i have with the spray is even with a good safe tune using spray can still go wrong. and i think im going to go with ether the turbos or the supercharger. im thinking 18 psi out of a KB mammoth blower or twin turbos with 20 psi. i am caging the car so im planing on more boost on race day.


what do you guys think about spraying off the line with twin turbos or would it be a bad idea

[86er]

turbos are just as bad, waste gate spring breaks or gets soft and boom boost spike and spilled guts out the block

[manolith]

srpay and with turbo=anti lag. turbos love spray.

[Stephen4036]

6 grand for a 750whp na motor will be tough...

I say 04 cobra motor/ steigmeister stage 4/pulleys/JLT

[RCCOLA]

Originally Posted by K7cobra im thinking about doing a motor swap on my cobra im not sure what motor i want to go with for 4 grand i can get a brand new 04 cobra motor from ford. but im not to sure if it will fit or what i will have to change in my car to make it fit. or should i go the N/A root and build my motor to achaive 750 rwh. i have the money i just dont know what i want to do

Can you explain how u can get a brand new 04 cobra motor from Ford for 4 grand?

[ZoomZoomMFer]

Originally Posted by RCCOLA Can you explain how u can get a brand new 04 cobra motor from Ford for 4 grand?

I was going to comment on that as well lol. I bought my used longblock for 2500, and total am close to 7k and im not done yet.

and if you do a turbo setup. Do a large single turbo, twins are not worth it.

[TRMach1]

I'm still trying to get my head wrapped around why anybody would want to drive a 750+ horsepower car on the street. It sounds good on paper, and it's cool to toss around the numbers in a conversation, but actually driving the car can be rather stressful! You get caught by surprise in the rain, or hit an oil slick on the road, hell, just hitting the gas, and you're not really sure which way that sucker is going jump and fishtail, and trust me, it will fishtail, no matter what kind of suspension and tires you put on it!

Good luck with your project!

[Cricket]

Lets just clear a few minor details up

Originally Posted by DickH should be fine with a turbo on the street, its not like its always boosting like a supercharger.

You are not always in boost with a supercharger. Each supercharger takes a certain amount of horsepower to even begin creating boost. Like the stock eaton on a terminator takes about 100hp before it even starts to create boost. I can drive my car around not in boost at all times. Once I get on it then it will start to create boost.

Originally Posted by manolith srpay and with turbo=anti lag. turbos love spray.

Turbo lag is almost a thing of the past now with ball bearing turbos. Also when you are racing at the track you should have the turbo and the rest of the car setup to launch in boost. You should never be out of boost unless you are not racing.