Dart SB-Chevy ''Pro 1'' Aluminum Heads

SB-Chevy Pro 1 Aluminum Cylinder Head
200cc Intake Ports
64cc Combustion Chambers
2.020'' Int/1.60'' Exh Valves
1.250'' Valve Springs, 110lbs @ 1.700''
.520'' Max Lift
Straight Plugs or Angled Plugs

I need a good set of heads right now. My 383 Shortblock is gonna be here in 2 weeks and im not putting my stock heads back on. The valve guides are shot. I saw other brands like AFR but I heard they take too long to deliver. Trick Flows don't have heads with intake ports this big. From what I see these are really good, if they fit.

 

The only way they can work is if you have a machine shop convert them to the reverse cooling LT1 style. It can be done, but you'll probably be better off porting some Trickflows out for the cost.

 

The short answer is no. Im looking at trickflows for later next summer, you could be a guinne (sp?) pig and tell me how they work

 

You have a lot of learning to do. The stock heads worked by a competent shop are VERY capable, you should have sent them out to be redone, pretty easily support a 500+fwhp drivable stroker and over 500rwhp race motor.
Far as the Trickflows not being as big a port, well if you think port volume is the be all end all of performance then there is probably no helping you anyway. The Trickflows are I think 195 untouched which is adequate volume for a stroker, there are guys who port stock castings to easily outdo those as cast though.

The heads you asked about are rated at a max lift of .520 and I don't think anyone would tell you to run a cam with that little lift, most of us run .550+ with some guys going .600+.

You NEED to put the brakes on this project and do some learning before you go any further otherwise you are going to spend a lot and someone who did a heads/cam package on a stock shortblock properly will mop the floor with you.

I know that sounds harsh but do some reading and you will see I am right.

 

Wasn't there a guy on Thirdgen.org that spent like $4000 on his motor and ended up running a half second slower in the 1/4? Mismatched parts == stupidity.

I think his username was poncho or something. What a dumbass. Your solution is to research before throwing parts on or put your motor in a 2500lb car like I did :P

Later,
Colin

 

Im not as retarded as you guys think. Ive done a full V8 swap in my S10. I just never had to deal with this kind of project before, valvetrain I mean. I understand that flow rate is more important thean port size. I also know that LT1 heads are unique. I just didn't know how different. I was gonna send my heads to Loyd but my car is a daily driver and cannot wait for weeks to get the heads back.

 

That is exactly why some people buy a spare pair of LT1 castings and send them to Lloyd so they have no downtime. Then they turn around and sell their stock castings that they pull off after putting on the freshly ported Lloyd heads.

 

No Dart 200cc Pro 1's dont' fit.... but Dart does have a 180cc LT1 head coming out this spring.

Bret

 

I didn't say you were retarded. I was chiming in and agreeing with a previous poster that some forethought needs to be put into modifications.

I cut the floor out of my Vega and am fabbing up pretty much everything else so I know what I'm doing, too. I just thought I'd offer my suggestion.

good luck,
Colin

 

Didn't you hear him he thinks the Trickflow 195 is too small .

Like I said you need to STOP and learn so you can get this done right especially since it is a daily driver. Do it wrong now and you will have downtime again in the future when you try and correct the mistakes you are looking to make now.
Also way too late to be picking heads if the shortblock is so near completion. What size combustion chamber was used when determining a target compression ratio for the shortblock? If they figured a stock casting head at 54cc and targeted 11.5:1 and you throw a 64cc chamber head on like the Trickflows you are going to endup below stock 10.4 compression or if they figured 11:1 with 64cc you would push it near 12.5 putting a stock chamber size on there.

 

have you talked to Lloyd? I am pretty sure he buys up used heads, just so he can sell them to people who can't send theirs out, then you can send yours to him after you get the other ones from him

 

Dwayne.... a 195cc port is too small but that's why you PORT THEM! A 383 needs 200+cc volume.

We have no clue what the pistons are so no way to tell him what size chambers he needs, that right there will make the choice on the heads for him.

Bret

 

i think he was reffering to the fact you said 180 darts after he said the 195's were too small.

I would just port the stockers if your not building a race motor, ported and cam...
there are some afr 227 in the sale section.....

 

Yes that is what I meant.
I would disagree with Bret on the port volume thing to a degree but we don't need to go there now.

Notice we are agreeing on the shortblock specs dictating what heads he has to choose from?

Get us specs on the shortblock and we can play with numbers to help you pick someting appropriate.
What are the ideas for a cam??

 

You guys just lost me. Maybe I am retarted and thought I knew more than I really do. I dont even know what the CR is on my short block with factory heads. I will find out today before I buy heads. I just needed my car to run so bad that I rushed into things. The guy I bought this block from posted this for CR. JE/SRP Forged Pistons Flat Top +.030 1.125 C.H. 10.8:1 with 64cc head dished pistons. Now I realize I need help!