a good friend of mine just came upon a 97 cobra... the car is not salvageable but the engine is in excellent condition. he told me i could have everything i needed to make my car a 4v for $300 (except the block because he wants that) and he will be helping me with the work. i havent looked into this before because i knew it was expensive but $300 doesnt sound bad at all.

my questions
i know 97 cobra heads are different from 03-04 heads because they're either single or double port and the newer heads are the opposite but i cant remember which way it was. i think 97's are single port.

would i need the wiring harness or can i modify my own to make this work? (i remember seeing a website dedicated to swapping 4v's into gt's but cant remember where that was)

is it worth doing? i know the 4v breathes much better than the 2v but this is an older 4v and im not sure if its worth the hassle or not.

and finally are there any other parts i will need besides what i can get off the car?

my original plan was to buy a vortech blower by mid summer, what would i need to still put a blower on the car after this swap?

thanks for any info.

 

I've asked this before on MPH, I don't remeber the specific answer, but I remeber evryone telling me its not worth it, and it's a pain in the ***...mabey someone can come with more info

 

yeah thats the kinda info im looking for... why would it be a pain in the ***? the price is good, although i'd think i'd probably need to change my exhaust also... for the most part it shouldnt be too bad except for the wiring harness but i remember seeing a site that showed how to modify a 2v harness to work on a 4v... i wish i could find that again.

 

for 300 bucks it's worth it! We've chatted a good bit about motor swaps so I think you know where I'm coming from on this.

You'll need the whole top end, front cover, fuel system, wiring harness, engine computer, exhaust manifolds, all the cooling system pieces except the radiator, 3-10 days to put it together, and a complete gasket set.

Those heads are nice. They're a different design in places to the newer 99-01 and 03/04 heads but they still flow lots of air and 4 valves are better than 2 for most things.

remember that you probably have a 6bolt crank so you'll have to keep that in mind when you go to get parts like a clutch and such.

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If you slap them on your bottom end you'll drop your static compression a bit which isn't good for NA power but helps if you want a blower on it and pump gas is your plan. Blowers on 4V engines always (all else being equal) have better results than blowers on 2V at the same boost level.

If I were you, I'd do it. It's a quick and relatively painless way to add major power potential.

 

thanks, thats exactly what i wanted to hear. and i was hoping you would see this thread. i was actually going to send you a pm about this. it will be a couple months until i get the blower so i will be driving n/a... how much do you think the lower compression will hurt my power output? it should still be more power than im making right now. and what would i need to make the blower work? different brackets because of the different top end?

last question, what else should i add to the car while it's apart that will complement the blower?

 

ok, i just talked with my friend again about this... basically i can buy all the parts i need to convert mine for $300 or i can have the whole aluminum teksid block with everthing to make it run for $700 and just drop that right in my car... but here's the problem. the blower i was going to put on would cost me $2500 for everything, im buying it from a friend around the middle to end of summer. in order to put a blower on the 4v i'd have to spend around $3500 or more on top of the $300-$700 to buy the engine. so i dont really think im going to buy the 4v because of the blower options...

 

Buy the whole thing and drop it in. You'll drop a hundred pounds which you'll appreciate a lot more than 400 bucks. Teksid blocks are killer and VERY expensive, so you're getting a great deal.

I'm betting you'll be at around 9.0-9.2 compression with GT pistons on a 4V head which isn't so bad (an estimate..not going to be exact). You'll still be seeing more than stock 99 GT power and you'll have more than 1000 extra RPM to use to build more. Other things to add would be blower cams (1000 bucks), single blade TB, 90mm Lightning MAF, a great tune and headers. The 4V flow like mad but they're butt plugged by junk exhaust manifolds. Biggest improvement on blower cars apart from more boost is better intake and exhaust parts.

making the blower work should just be a discharge tube, belt, and bracket (plus fuel system stuff that you'd need anyway). I don't know how you'd get to 3500 in parts to make it work... they're mostly the same kit and brackets are not expensive really.

Don't get discouraged...you're staring a 425rwhp monster in the face... put it in your car. It's more useful there.

 

also, a used blower for 2500 is too much money. 2k tops and that's if it's pretty close to new. Don't let people bowl you over to paying too much for used parts. Figure the kit is 3800 new, cut that in half and that's the most I'd consider paying for a used blower. I'm cheap but I also get good deals by waiting for them.

 

hmm... you got me thinking again.. i may do this swap. ill find out this weekend. if i do im going all out and buying the block but it will just be that much longer until i have the blower on the car.

the blower is brand new, never been installed. i figured $2500 was a damn good price.

 

2500 is good if it's totally new. I assumed something and was wrong... my bad. Sell any parts you can't use or swap them for parts you need.

Remember... the one thing you have is time. Taking the time to build it how you really want it makes it so much more satisfying when it's finally done. I've spent 3 years on mine and I'm almost done with suspension and safety systems. I've still got the 5.4 swap and a blower to work through.

 

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