JasonG

iTrader: (1)

After reading as much as I possibly can I'm thinking about getting a custom cam to replace my G1 cam that I have now. I'm mostly looking for more under the curve than that peak number(even though I don't think I'll lose too much up top). Right now 228/232 .588/.575 113LSA and my TEA 5.3 Stage1.5v2 milled .010. Here are the head flow #'s:

Lift Int Ex
.100 68.0 50.3
.200 140.5 110.3
.300 202.1 157.4
.400 253.2 217.5
.500 291.7 251.1
.550 305.4 257.2
.600 315.6 262.1

Keeping with mostly a street car in mind and not wanting to replace the springs every couple of years(I put about 5k per year down) here is what I was thinking.....

224/228 .605/.610 110LSA(+0)

Now with those basic specs brings in the questions... I'm not sure I wanna go all the way with the LSK lobes so I was thinking about the XFI(I think) lobes. Now if I went all out with the LSK lobes vs both lobes on XFI how much would I be giving up? Would there be any reason(more power under the curve) to run say the intake on a XFI and the exhaust on a LSK, or vice versa, or even with an XE-R lobe? And should I take any advantage of +1 or +2 instead of straight up? Finally I would also wanna know will I have to worry about PtV clearance since I have 5.3 heads and they are milled a small .010? If so, what type of adjustments should be made to take that into account? And I know the easy answer is to clay, but most of the guru's out there will know if it's close. I think I'd change things if it were close, as I'd prefer someone to be able to say "no problem, plenty of room".

Mods are in sig, if I do replace the cam I'll prob. add a ported TB and underdrive pulley at the same time. Also the head gasket is the gm replacement. If ya made it this far, thanks for reading.

PS- Mods if ya feel this is better destined for Advance Tech feel free to move it.

Cstraub

iTrader: (1)

Are you numbers with intake bolted on the heads or without? Well looking at the I/E % you need to consider a reverse split for the best bang for the buck. Your at 86% at .500 lift. Why crutch the exhaust, it can easily get out what will be left behind in a short amount of time/duration...

JasonG

iTrader: (1)

Flow numbers are the standard ones provided from TEA on thier machine, so it's just the heads.

So judging by the numbers you'd suggest something more along the lines of 228/224 instead?

Cstraub

iTrader: (1)

Yes thats the route I would go.

eamador11

Why are you thinking that high of a lift and LSA of 110? that would be choppy as all hell.....plus that will equal spring change every 15k miles.

Might as well go with the AFR 224/228@114 cam, designed for street car in mind and it doesnt stress the springs.

Patrick G

iTrader: (14)

A 224/228 110LSA cam is not choppy in comparison to many more popular cams on the market. With only 5 degrees of overlap at .050", it's hardly a monster. With today's spring technology, Comp 921s can last 30-40K miles with that cam if they're shimmed properly.