SVTeeshirt

First of all sorry for the thread title, but, its the economys fault lol, I've had plans to blow my car with probably a T-Trim or a Novi2k for a while now, but since i've actually started buying parts my work has sloooooowed down SOO MUCH its riduclous, its almost non existant, barely enough to pay the little bills i have, anyway, i'll get to the point. I'm sick and tired of not driving my car, i want to drive it but i don't wanna throw away the blower dreams, thus brings me to my question, Pistons! well more so the ccs and overall compression ratio, i'll be using 01 cobra heads/intake. I know its winter but i haven't drove it forever, thats gotta change, so im forging the internals obviously, stock crank, h beams and pistons, what i want to know is is there a middleground for compression as to where i could run it N/A, still make decent power (315ish crank?) and when the time comes still be blower friendly to make big power? Im thinking since im waiting im gonna go twin screw which i wanted to do in the first place... iirc that means higher compression is better?
I'm guessing i could run like 9:1? or more/less advance/retard timing? Thanks in advance.

Xemeth

9.0:1 is probably right around stock compression (I forgot the exact numbers). So if you were to keep it around there, you'd basically have a stock 99/01 engine. That should be blower friendly, depending on how much boost you plan on making in the future. What's your final HP goals?

Worst case scenario if you really want to up the boost, you can find thicker head gaskets to lower the compression ration a hair.

Are you using stock 96/98 cams? If you degree them properly with the C heads/intake, it'll be good for another 15-25 hp. It's a popular cheap cam setup for 99/01 Cobras and 03/04 Machs. I can't see 315 crank hp being too hard to hit.

SVTeeshirt

I have all the cams at my disposal, the 01s are new the ones in my old heads have 158k on em, do cams go bad? lol lobes get wore down or anything, i might do that, Would i be losing anything come boost time? Thanks for the reply @ 3:24am here lol.

Xemeth

Well, cams can go bad, but I highly doubt there's anything wrong with them. Just look for excessive wear marks, you'll be able to see it if there's a problem.

I'd go with the 96-98 cams in the C heads, personally. You have both, and you can always upgrade later if you want. I don't imagine either cam would affect the boost differently than the other.

I think we're in the same time zone. It's 4:00 am here. I got home at 2:30ish. If I'm up that late, I usually can't fall asleep till around 4:30, 5:00.

SVTeeshirt

I'm the same way ever since work pretty much came to a halt, im in MD, the 01 cams are already in the heads, you think i can rev higher than 6850 if i throw in some valvesprings? Or you think i'll still be limited by the crank pulley?

Xemeth

Well I doubt stock cams (either of them) and the intake will even make higher than that, so I don't see the need to rev that high without some aftermarket cams and at least ported short runner intake.

SVTeeshirt

I may do it anyway just for preperation for boost.

SVTeeshirt

Ok so i did some research, it seems like the cams are only worth if if i have 03/04 cams to start with, maybe? "Just did some desktop dyno simulations for the '03, '01, '98 intake cams and FGT cams. Engine spec'd around my car, only difference was in the intake cams and FGT cam set. HP is at the flywheel."

Peak HP/TQ:
2003 cams: 382@6000, 370@4000
2001 cams: 397@6000, 368@4500
1998 cams: 401@6000, 368@4500
FGT cams: 391@6000, 374@4500

Average HP/TQ
2003 cams: 272/320
2001 cams: 282/327
1998 cams: 284/329
FGT cams:273/320

HP/TQ:
RPM - 2003 cams - 2001 cams - 1998 cams - FGT cams
2000 - 110/289 - 108/283 - 108/283 - 111/292
2500 - 137/288 - 137/289 - 138/290 - 134/281
3000 - 176/308 - 174/305 - 173/303 - 168/294
3500 - 229/344 - 225/338 - 224/336 - 224/336
4000 - 282/370 - 279/366 - 279/366 - 281/368
4500 - 316/369 - 315/368 - 316/368 - 321/374
5000 - 341/359 - 348/366 - 352/368 - 352/370
5500 - 358/342 - 369/352 - 372/355 - 368/352
6000 - 382/335 - 397/348 - 401/351 - 391/342
6500 - 361/292 - 384/311 - 389/315 - 361/292
7000 - 305/229 - 360/270 - 374/281 - 288/216

96-98 204 deg dur
99/01 200 deg dur
This is the specs for the cams. As you can see there is only 4 degree difference in duration.

from SVTP but originally from a mach website.

However, im not sure if it would make a difference as he tested in 03/04 heads, idk if 01 heads would make a difference.

SVTeeshirt

http://www.mach1registry.org/forums/...ad.php?t=93205

99BlackPonyGT

**edit nvm just saw your last post