406 build for low 11 seconds high 10's



Here is the setup so far need to know what to run for compression..

Dart 200cc iron eagle heads- manley race valves, slightly ported
1.5 ratio roller rockers should i get 1.6's?
stud girdle
doug herbert cam 245 duration 567 lift solid roller
pbm solid roller lifters
eagle crank, eagle 5.7 rods
msd 6al ignition
currently have rpm air gap intake/ single plane work better?
3000 stall convertor.... will get higher if needed? cam recomends 3000
th350 trans race built
3.90 9 inch rear
holley blue electric fuel pump
currently have 650 mechanical demon, will prob need to get bigger carb?
hedman long tube headers
3240 pound car with me in it, pretty much stripped

havent got pistons yet, not sure how much compression i should run, i would like to be able to mix race gas and 93 octane. As i will drive this car to local car shows and occasionaly to work. would run straight race gas when racing, maybe get a igntion retard box when running it on street? let me know what you guys think

 

If you're using a big cam and a stud girdle, those 200cc heads aren't going to be enough. I also don't think those heads are that great.
However, that cam is barely big enough to be considered lumpy, in a 400 that is. I don't think you'll need the stud girdle, IMHO.

Yes, bigger carb. 750CFM at least.
Single plane is what i'd recommend.

10.5:1 CR. Make sure you have a .035-.040" quench. With 93 octane, and a tiny bit of timing knocked off (and it's a light car), you should be able to get away with it on the street. Add in a bit of race fuel and tweak the timing for best power and run the strip.

Trevor Jacek (sp?) runs a similar combo, and I think he hits 11.0. Slightly bigger/better heads though.

 

well i already have the stud girdle so i might as well use them. I know the heads arent the best but i ran 12.20 last year with them with a xe274 cam 490 lift and 240 duration, holeshot 2000 stall, Also was running keith black 30cc dish pistons... im guessing about 9.0 compression or less. you think the porting to the heads, new cam and higher compression, single plane intake, would be good for atleast 11.5?

 

I'd zero deck the block and run a good forged flat top piston with a small chamber head and go for as much compression as possible.

Run the 1.6 ratio rockers that will give you alittle more lift and area under the curve out of the cam.

The intake and carb are not sufficient for what you want to do. pickup a Brodix single plane manifold with a Holley Hp 850 carb.

go for at least a 3000+ stall converter with a trans brake

 

hypertectric pistons be allright? didnt think i would need forged since im not going to be spraying or using any boost.

 

Exactly.

 

Just out of curiousity, for the sake of the motor, how much street life will this motor see (idling time)?

 

ok i run a solid flat cam(306s) and i have 200cc heads(brodix racerite 200) that are a bit small for my 385.. dart pro 1 215's are a good choice but AFR 210's are better..

750Dp carb, compression should come up to around 10.5:1, zero-decked block, good quench(.035-.040), single plane(vic. jr.).. and you are set..

no need to run pump/race mix.. you could possibly run 89 in that combo.. i safely ran 11.2:1 on 92 octane..

 

i think i am going to go with arond 10.5 compression, car will only be driven to work every once in awhile and to local car shows. I have heard with the solid roller cam that it is not good for them to idle for long periods of time if thats what you are getting at.

 

That's what I'm getting at. Some of the older style SR lifters don't have the adequate low RPM (think: idle) oil suppy for the roller bearings which doesn't bode well for the life expectancy of the lifter.