KMdoza7

iTrader: (1)

Long story short my car overheated and my head gasket blew.
So if I'm going to go threw all the trouble of replacing my head gasket i might as-well string together a new combo right? well why not? This car will be seeing the track, (if i ever get it to run right!) and it will also be my DD. i need some assistance in choosing my parts because i dont want to be disappointed in my build. All ADVICE IS WELCOMED and APPRECIATED!

GOAL:around 350 HP or more if possible with the TPI (thats why i posted in this section)

SPECS:
NOW: CR: 9.71:1
SC:9.7
DC:8.202
Heads: 193 65cc
CAM: 12-256-4 (1500-5500)(212/218)(.449/.456) 1.6RR (.479/.486) 112*
it was an ok cam to say the least, it worked pretty good with the 193 heads and ported intake.

Specs W/ new combo

SCR: 10.28:1 W/ felpro 1094 and 65cc head (193 or AFR 195cc or 180cc)
10.08:1 -10.27:1 W/.028-.020 thick gasket and 64cc head (083 tpi head)
10:1-10.31:1 W/.041-.028 Thick gasket and 62cc Head (TF 195s)

CR: 10:1-10.3:1
my cam options are: Computer Controlled
12-404-4
(1800-5800) (222/226) (.464/.464) 114*

12-256-4
(1500-5500) (212/218) (.449/.456) 112*

12-262-4
(1500/5500) (218/224) (.464/.47) 114*

12-268-4
(1800/5800) (224/230)(.477/.48) 114*

Xtreme Fuel Injection:
12-365-4
(1500/5500)(216/226)(.499/.493) 113*

12-366-4
(2000/6000)(224/231)(.52/.515) 113*

12-367-4
(2400/6400)(236/241)(.552/.547) 113*

12-368-4
(2800/6800)(248/253)(.584/.579) 113*

(I know some are too big!)
Those are about all the CompCams that i found worked with the TPI and/or were computer friendly.
If theres any other cam options from other brands let me know please

HEADS: I can either port my 193 heads, port and machine my 083 heads that i have laying around..... OR i can go ahead and save up alittle bit more cash for some Trickflows or AFR's.


SUGGESTIONS?

EDIT 1: I forgot to mention that the block is a flat tappet

KMdoza7

iTrader: (1)

So right off I know which cams not to go with 12-368-4, 12-367-4 (to much duration for my 10.1 SCR) , and 12-256-4

KMdoza7

iTrader: (1)

So I guess im just going to port my 193 heads, use a .015 thick headgasket, and go with the comp cam 12-268-4 W/ 1.6 RR.
SCR: 10.28:1
Im also going to simease my intake while its out

Johnny Blaze

iTrader: (15)

I'm building a similar combo, shortblock is done, heads being ported.

355
10.23:1
083 heads 2.02/1.6 ported
comp 08-501-8
1.52 comp roller rockers
ported stock base
ported slp runners

desktop dyno shows at least 360hp, does not allow for ported tpi. I doubt it's that high, but I'll be happy with at least 325hp.

Mine will have a 5 speed and 3.27 gears.

Comp suggested the 500-8 for better milage, as I'm building a daily driver.

KMdoza7

iTrader: (1)

Are you going to dyno it when its done?

KMdoza7

iTrader: (1)

Well before I pull the trigger and spend some cash i would like to get some input from some of you people here.
I want my SCR to be between 10.2-10.3:1
I can either port my 193 heads, port my 083 TPI heads, or save a little more cash to get some TF or AFRs
I have narrowed it down to four cams so far.

12-268-4
(1800/5800) (224/230)(.477/.48) 114*

12-365-4
(1500/5500)(216/226)(.499/.493) 113*

12-366-4
(2000/6000)(224/231)(.52/.515) 113*

12-367-4
(2400/6400)(236/241)(.552/.547) 113*

So what do you guys think??

Johnny Blaze

iTrader: (15)

Are you planning on machining the heads to clear that much lift?
My 083s are cut for bigger springs as well.

I'll probably chassis dyno my car at some point to get the tune better.

Have you asked comp for a recommendation?

Johnny Blaze

iTrader: (15)

With my speed pro flattops, sitting .020" in the hole, I'm running a .015" gasket, giving me a tight .035" quench and 10.23:1 static with my 64cc heads.

KMdoza7

iTrader: (1)

Well right now my springs will hold a .500 lift and they dont even have 100 miles on them .also i neee to check they head to see if its warped. Ill give Comp a call later on to see what they say.
do you have the four valve relieve speed pro pistons? The 5cc ones? Before my build I never new anything about quench, SCR, or DCR, i just started finding things out not to long ago. So with this new combo I want to have parts that will work best with eachother.
Right now im leaning on the XE268h with 1.6 rr. It should give me a .502/.505 lift, good enough to make some good power and I wont need to get new springs.

KMdoza7

iTrader: (1)

Just got off the phone with comp and they said the XE268h is the way to go.

RaverRacerX

put as much lift into is as is safe.

the 366-4 has a healthy ramp rate but if you can get more.. get more. believe it or not, the XFI lobes are among the most aggressive ramp rate wise.

if you have a competent tuner.. id say the 366. if you could get the 224/230 duration with teh 368's lift.. do it. itll be a lil harder on the springs but itll keep the valve open in the heads higher flow areas longer. the in between would be the 224/230 with teh 367 lift of 552/547

would love to see/use an XE-R lobe on an SBC one of these days with teh 1.7 rockers too.

KMdoza7

iTrader: (1)

Will there be much to gain with all that lift from these pocket ported 193 heads?
Im looking into getting some dart 180cc heads if that makes any difference
I took the topend apart already, I just need to find a good combo that I will be happy with

RaverRacerX

no matter the head, a cam works mostly in the mid lift areas. the peak lift is just that.. peak. the avg lift of the cam will be somewhere in teh middle of the flow sheet so to speak. the duration determines how long it will be there. duration must be paired with lift as its what makes the power.

the high ramp rates will get the valve open and close more quickly and will help keep velocity up which is a must.

another thing to remember is that the lower duration/high lift cams will also raise your DCR. anything above 8:1 in the dynamic compression is getting up there, at least for the LSx. its tougher to get a very high DCR with lower SCR (static compression) but it can be done.

because you are using stock castings, they need to be crutched a bit and i think the higher ramp cam would work well. so.. its a long winded yes.

interesting part about high ramp rate cams? they can make a large amount of power and be very... sleeper'ish..