wat cam?

[wick]

Trick flow gets you a 2.02 valve and no piston notching. Its a no brainer. They can be had cheap too. Used.

[Killercanary]

your gt40s are just as good as afr 165s, i have seen almost the exact power from guys with either heads (ported gt40s of coarse)

That's your opinion Tim and I respect it but I couldn't disagree more. Head weight, valve train stability and weight, deck thickness, port velocity, chamber design, port flow, consistency of flow across all ports, etc all need to be considered when selecting a head and its no contest when looking at all of the factors. You may get a peak number out of a HEAVILY worked GT40 head that can come close to matching that of an AFR but I'd bet money that they AFR will have more area under the curve and ultimately be the faster car. Higher peak HP numbers do not mean that the car will be faster, the car with more area under the curve will even if it doesn't make as much peak power. I was running 12.1 at 111mph with 294rwhp with my AFR165 heads in my heavy 'vert which was ~3700lbs at the time.


I made 380rwhp with my 8.89:1 compression 331 with my AFR165's and that was with my old FTI cam that was ground for my stock shortblock combination. I do believe I was about maxed out at that point with them, but the rap they get for not being able to grow with combinations is a bit exaggerated.



94SVTcobra- Here are just a few of your options that will work with stock pistons:

-GT40 iron
-GT40P
-GT40X
-Edelbrock performer and RPM heads with the 1.90" intake valve
-TW
-AFR165 (this is my choice for a stock shortblock combo)
-Holley (its been a long time since I've kept up on holley's heads, but the heads that originally came in the systemax II kit came with a 2.02" valve that cleared the stock pistons back when my dad put the kit on his '91.

[Blown91gt]

I'm extremely happy with my GT-40 irons. I know they are considered "old school" but they make power. It's going to be more cost effective for Mike to get his heads worked and do a cam swap at the same time than to pick up a set of AFR's. That is if his car still has GT-40s on it......

[94svtcobra]

What's wrong with the bottom end you have now?

I want to build a 347 stroker

and paul I understand what your saying, but for the cost I really dont want to put money out for a head that wont be a major improvement, I think thats wat Tim was getting at, he knows my limited financial situation, If I have to I'll just wait until I can afford to build it correctly I will

[94svtcobra]

That is if his car still has GT-40s on it......

one of the previous owners might have installed one e7 head

[Rodeheaver's]

That's your opinion Tim and I respect it but I couldn't disagree more. Head weight, valve train stability and weight, deck thickness, port velocity, chamber design, port flow, consistency of flow across all ports, etc all need to be considered when selecting a head and its no contest when looking at all of the factors. You may get a peak number out of a HEAVILY worked GT40 head that can come close to matching that of an AFR but I'd bet money that they AFR will have more area under the curve and ultimately be the faster car. Higher peak HP numbers do not mean that the car will be faster, the car with more area under the curve will even if it doesn't make as much peak power. I was running 12.1 at 111mph with 294rwhp with my AFR165 heads in my heavy 'vert which was ~3700lbs at the time.


I made 380rwhp with my 8.89:1 compression 331 with my AFR165's and that was with my old FTI cam that was ground for my stock shortblock combination. I do believe I was about maxed out at that point with them, but the rap they get for not being able to grow with combinations is a bit exaggerated.



94SVTcobra- Here are just a few of your options that will work with stock pistons:

-GT40 iron
-GT40P
-GT40X
-Edelbrock performer and RPM heads with the 1.90" intake valve
-TW
-AFR165 (this is my choice for a stock shortblock combo)
-Holley (its been a long time since I've kept up on holley's heads, but the heads that originally came in the systemax II kit came with a 2.02" valve that cleared the stock pistons back when my dad put the kit on his '91.

haha, i am glad it was you that chimed in... I am sure we can agree to dis agree on this one..:) I guess I am just a little hard headed when it comes the afr heads, I havent been to happy with them in the past, so i choose to go another direction... But many many people absolutely love them and that is their choice.

[95riosnake]

I think thats wat Tim was getting at, he knows my limited financial situation, If I have to I'll just wait until I can afford to build it correctly I will

I think if I was you, I'd buy a 302 block and start building the motor separately. Save up and buy some really good parts the first time, then once the motor is done, swap it into your car and sell your motor to make back some cash. I think most anything you decide to throw on your motor now would probably not be enough to use with the 347 in the future. Your car is making really good power for what you've done to it so far, so it's not like you're driving around in a dog of a car in the meantime. Just my .02

[yeahloh95]

i too like the afrs, but i have a set of trick flows that might end up on my coupe, so we will see how they work ???

[somethingclever]

I want to build a 347 stroker

, he knows my limited financial situation,

if you have a limited financial situation I don't understand why you would spend, what, close to 2k, to replace a good running 302 shortblock with 45 more cubes....ESPECIALLY if you still intend to run a 351w based engine down the road.

I see respectable HCI cars on tons of forums and at PRP.

[94svtcobra]

the 347 would replace the 351 based engine, after seein what my 302 can do, a 347 with hci should be plenty.

[94svtcobra]

I think if I was you, I'd buy a 302 block and start building the motor separately. Save up and buy some really good parts the first time, then once the motor is done, swap it into your car and sell your motor to make back some cash. I think most anything you decide to throw on your motor now would probably not be enough to use with the 347 in the future. Your car is making really good power for what you've done to it so far, so it's not like you're driving around in a dog of a car in the meantime. Just my .02

I hear ya dan, just trying to see wat wat my options are, I'll probably still throw a cam in my car over winter with some roller rockers. porting my gt40s n cobra intake might be the way to go just to get a lil more out of it, n not spend a fortune

[biminiLX]

I understand what you're saying Mike on finances but a TFS TW is the best alternative that would work with a stock shortblock AND your future stroker (with or without porting as a buddy has used unported TWs on a 408 and gone deep 10s).
Why pay for porting and then heads down the road?
You can find a set used for $1000 usually.
yes you would need rockers, but you'd need those down the road also and are relatively cheap
Did I read you might have ONE E7 head and ONE GT40?
Wow, that would suck and make upgrading to aftermarket decision even easier.
Like I said earlier, head flow is where you can gain the most power.
-J

[94svtcobra]

no on the one gt40 and one e7 , just joking after finding that I had 7 24# injectors and 1 19# injector

[Killercanary]

IMO its a waste to make any of the changes you mention above. To pull the heads, you will need to replace the head gaskets, head bolts, lower intake gasket, header gaskets, possibly header bolts, coolant, etc. This can add up quickly, especially when adding the cost of porting on top of it. Also, if you put a cam in it you will more than likely need a new tune as it'll more than likely not want to idle. That is why I retained the stock cam in my cobra when I put my AFR165's on it. I don't have the money for a tune right now so a head swap is all I did to it. I'd drive it as is and build a new engine on the side as Dan mentioned above so in a weekend you could swap it all out.

[Killercanary]

haha, i am glad it was you that chimed in... I am sure we can agree to dis agree on this one..:) I guess I am just a little hard headed when it comes the afr heads, I havent been to happy with them in the past, so i choose to go another direction... But many many people absolutely love them and that is their choice.

No problem with not agreeing as long as its civil right? :) Maybe I need to come down and spin the rollers to make a believer out of you. :)

[94svtcobra]

paul in ur opinion, would it be worth throwin on a set of roller rockers?

[cam303]

No problem with not agreeing as long as its civil right? :) Maybe I need to come down and spin the rollers to make a believer out of you. :)

We could do a dyno run off.. A 331 with afr's and a 331 with trickflows. hahaha..

[yeahloh95]

paul in ur opinion, would it be worth throwin on a set of roller rockers?

your car should already have 1.7 ratio roller rockers

[wick]

your car should already have 1.7 ratio roller rockers

[Killercanary]

paul in ur opinion, would it be worth throwin on a set of roller rockers?

Cobra's came with 1.7 roller pedestal style rockers.