Ran my first 10.9xx @123 this weekend. Driving 1 hour there and back in a 1972 Nova
Current is (406 509 stock rods crank trw pistons trickflow 195cc heads boosted on terminator)
I have a new SHP block forged crank and rods DSS power adder pistons 10:1 waiting on deck for machine work.
My current combo is out of steam at 1200 ft. Shifting at 5800 and through the traps at 6000 but not making any more power.
Goal for next year 9.99 street car.
Whats a good head for this goal? 220cc? Brand?? Characteristics I should look for? Cam is also not purchased yet.

 

whats your cam specs?

 

Have not purchased one for new engine. . Current is 15 years old and unknown.

 

I guess I could see a 400 eating up those heads.
I like afr heads. Always seem to be good quality, and good power.
Im not the guy to tell you what heads will support it. Might call the head company you decide on and get their recommendation.

I would think with a suited cam and more boost it should go easy 9s. Seen plenty of 383s with bitty heads go high 9s on 12 ish lbs in a similar weight car and drive line.

 

I filled out 4 cam request forms and received 1 back. These are the recommended specs for this build.

Howards cams
.560 lift
114 l/c
297 Dur
245 @.050

 

For reference, my old 400 with dart 230s would go 10.90s@ 123 4500 converter , 255 @ .050 , 108 lsa
6500 ish out the back. This was na combo.

My new turbo cam is in the 250s on a 114 lsa. But it was specd for 1000 ish hp on boost.

How much boost did you have on 10s pass? What fuel? Gear?
Did they give an rpm window with those cam specs? Was that cam specd with those heads?

 

12 psi boost pump E85 3:42 28 tall tire.
Rpm window requested was 2400-6500 they didnt supply a number for their grind.


New just in recommendation from CamMotion.
Hey Shawn,

Here's what i would like to see you use,

Solid Roller: .016'' Hot Lash
249/257 Duration @ .050''
116 LSA, 111 ICL (116+5)
.645''/.630'' Lift with 1.5 rockers
Core: 8620 Billet Steel (331-0183)
Price: $515.00 + Shipping
Grind# ML249/430-ML257/420-116+5

I know you said you wanted a hydraulic roller but this setup would benefit greatly from a solid roller profile.

 

It sounds like your unknown cam might be holding you back.
I like solids.
Any head in the 300cfm range is gonna be what I would look for.

Was the tune up like? Ive had low timing e85 stuff just stop revving undertimed.
I feel like there is more in what you have.

 

37* controlled with Terminator x.

 

Cam Motions solid roller rpm window 3500-7000.
How would this work on the street? It seems like a bottom of the page pick.

 

New recommendation
Jones cams
242 @.050
114 lc
.562 lift
3300-7000
Hydro roller. HR75375-114

 

The jones or howards cam should work. They are very similar.
If hyd is the route you want.
The cam motion seems a bit aggressive for what you want.

There is something holding your current combo back. This new combo should be capable of 9.9os on less boost then you have now.

 

I dont know if it was because I left my air filters on or what but the motor was done pulling at about 1200 feet.

The fact that my current short block is as came from GM in 197? Makes me not want to push much harder. Stock But for +.030 pistons And a Howards cam.

 

A general rule of thumb when comparing hyd vs solid is to subtract 10* from the solid duration for lash. So the solid has less "effective" intake duration. The solid is gonna make more hp, make better use of any good head you put on it, and with the lsa act milder than you'd think. None of them are gonna be great at low rpm cruising, so good on the street depends on your wants.

 

Do you have a recommendation for better street manners? And still make power enough for a 9 second pass?

 

Howards rpm window. 3500-7000

 

How much hp do you need? So much of that is dependent on the chassis, trans, and converter. Plenty of people go 9's with much less cid, and a cam in the 220's. More head flow, mild cam, and more boost makes for the most streetable combo imo.

 

I asked about street manners. Jones said it would be OK but not fun in traffic so he recommended this.
Did not give rpm window I dont want to bother him again....

If you want something more street friendly, Here's what I recommend.
Cam#: SBC, HR73353-114
231/[email protected]"
.353"/.353" Lobe Lift
.529"/.529" Valve Lift
114 LSA
Price: $561.64

3000-6700 (i bothered him again)

 

Its doesnt sound bad.

blown385 on this site went high 8s with a cam specd 236 ish @ .050 112 lsa with a 383 cid. 4400 lbs truck.
Lots of boost but it did it.

 

Instead of banging my head any more I ordered the last one. His wait time was better than anyone elses as well.