I don't want to keep hijacking threads so I started my own.

The previous owner claims to have rebuilt my stock heads with bigger valves (1.60/1.90). He also claims to have put in 1.6 rollers, & ported and polished the ports to match the lower cobra intake. I have an E cam, full exhaust, CAI and other goodies that I don't want to type up now but can if it will influence your answers to my question:

Although aftermarket aluminum heads will weigh a lot less (exactly how much?) and flow more than my alleged setup, but for the price is it worth it? I plan to go forced induction around this time next year and I really don't want to drop nearly all the $ necessary to blow this thing on a set of heads that will give me negligible benefits over my stock heads. In other words, I am going to get more power with my current setup plus a blower than I would with an awesome set of heads. What would you do?

 

if the heads are indeed ported and polished with 1.9/1.6 valves i wouldnt bother swapping them out just yet

 

That's what I say. Thanks for the reply, Adder. Getting replies from dependable sources on this forum can be like pulling teeth. I appreciate your input and kinda hoped you'd throw in your .02.

 

depending on which way you go with forced induction... you can still crack the block with FI and stock heads...

 

I find it odd that someone would go to all the trouble and expensive to put in 1.9-1.6 valves..also I highly doubt it has a 1.6 exhaust valve in it maybe 1.54. that's where it's great if the guy had paper work...only way to know is pull a head off...me I'd want to know because I would be skkkeeerrrrddd to make a cam change not knowing

 

that's why you check ptvc...you big dummy

 

you know people here don't do that ..dingleberry

 

Ha, dingleberry...haven't heard that in a while If you were going to stay N/A, I would say that swapping to 165's or TW's would probably be worth your time. The research I've done has led me to the conclusion that throuroughly ported E7's are a little better than stock GT40's.

But, if you do indeed have larger valves, I would just keep them and get your blower. One can make good power on a stock (untouched) longblock, much less one w/ ported heads and bigger valves and a E cam.

 

only way IMO they would flow anything is install some severe duty manley valves that has the cut back stem

 

PTVC? Am I missing something?
I agree that the alleged heads seem a bit fishy, but considering how well put together everything else is, I wouldn't doubt it too much. The guy I bought it from barely did anything to the drivetrain. The guy before him setup the engine and he has a list of all the things he did for his ownbragging rights and you can tell it was filled out as things went along. Who knows. I just know that a turbo or blower is where I want to go and I don't want to get at the internals until I have blown them up with boost