is anyone running these heads if so what kind of ets are you getting

 

im running those heads....

200cc runners

64cc chamber

202/160 valves

and i ran a 12.50 running a 406 with a small hydraulic cam and a performer rpm intake... i reall havent used them to full potential yet so when i change the cam and intake ill let u know...i was told by many ppl they are really good heads for the money....

 

cool what plug are you running, and heat range,im running 215 cc dart heads with rpm intake and comp extrem 274 230 236 @.50 and 488 490 lift,1.6 roller rockers,the motor is a 355ci with holley 650 dp,best et in the 1/8 is 8.2 at 90,i was hoping for a better time,get back with me on those plugs thanks

 

just a regular temp plug ngk 6s i think??

my cam has a .515 lift 300* of duration.. with 1.6 rockers and a holley 750 dp...
my 1/8 mile was 8.0@86... so u get an idea where u are at....

 

chad.....why are you running such huge heads on a 355(small motor) with such a small cam??? that combo can't possibly run as well as it's potential. I'm running a similar cam in my 305....because I needed a big cam for it. Now i'm not running huge heads and it works for what i'm doing

you need to up the cam, or do something to help it out there. plus a bigger carb would probably help you out on the track as well.


my .02

 

the cam is good for 1500 to 6000 rpm,intake 1500 to 6000 and the heads are good to 7000

 

do you think that going with the larger 215 CC compared to 200cc is costing you HP at all?

 

i dont no mybe,im getting a proform main boddy for it to a 750,going to try that then if it helps then with upgrade cam,mybe a 284extrem

 

the car traps 90 mph in the 1/8,i was hoping for 94 95

 

your losing alot of low end torque that the cam and intake want to produce by using that big of a runner head. we are running the 200cc heads with a holley street dominator intake, a 525" lift solid cam, we should be running 11's this year. haven't gotten the motor totally back together yet...

 

what cam do you think i should run

 

I am running stock 305 heads (mild porting) with a 750 VS, Torker 2 and Summit 234 duration/.488 lift cam w/1.6 roller rockers on a 305. We have currently run a best of 8.11 @ 85.75 in 1/8th mile.

To improve, we are going to try a 230 duration/.465 lift cam from Crane w/performer RPM air-gap manifold.

Our best 60' time is 1.84. With current set up, it does not appear that there is enough low end to improve 60' time. We have no traction issues, car now hooks well. We had the choice of changing converter to raise stall speed or look for more low end. Since we will be installing a 350 or 383 we elected to try and improve initial torque.

What are your 60' times?

 

1.9 is the best,spins bad

 

my best 60ft was a 1.76 with the sway bar still on and the 17s still in front... im hoping for 1.6s soon..

 

fix your traction problems, then come talk to us...
get a set of the new M/T Drag Radials and some good suspension(like spohn). the new tires will be released in April...

 

Those heads are giving up a lot of air velocity in the low rpm range there for torque and hp too.You generally want to match
cam total lift to the max flow of the heads for peak performance.
on the other hand most street cars spend very little time in the max flow area.Mid flow since the valves cross this point twice(rising and return) I think has the most influence as far as drivability and useable hp and torque..

 

well the heads dont flow that great,268cfm intake and 175cfm exhaust but thats at 600 lift and i got 488 and 490 lift with 1.6 rr,its a little better with the 1.6s

 

i'd go bigger cam to help you out....i like the .525 lift suggestion from mw66nova, although you could go bigger with that 1.6 ratio.

 

yeah im going to try that,i think the heads suck to honest i wish i would have gone with the afr

 

get some traction and that cam.....i think you'll be much much happier. I know i would be.

 

well, i have heard nothing but great things about these heads from all of the hardcore engine builders that i have talked to. if your not making lots of power, then you have something miss-matched. before you go and do another head swap, put in a cam that is suited for the heads. what gears/stall are you running? with those heads i would suggest at least a 3500 stall converter and a 3.73 gear. (assuming you have a 700r4) call comp cams and ask about a custom cam for your combo. spend the money on the phone, then spend your money on your combo once.

 

tko t-5 5 speed 4.10 gears

 

90 mph in the 1/8 is really good, I would put more money in the
traction area first. Improve your 60 ft targeting about a 1.8 and
then make a decision after that.

 

Actually I'm running those heads on my firebird. I'm using a Melling O.E. LT1 grind from 70+ corvettes. 13.03 @ 102.40 with a 1.88 60ft. Not bad for a action+ manifold with a 600 CFM vs holley.

 

A friend of mine had a 406 with Iron Eagles on it in an all steel 1970 Chevelle and ran a best of 10.96, but consistantly ran 11 teens. It even still had the drum brakes in the front.