CAMAROZ28AQUINO

1) how many degrees advance should i get ground in for 91 octane fuel, stock head gaskets. and would be best for heads down the road.

2)What length pushrods would be optimal? 7.425?

3)What lobes do get ground on? is XE-R okay?

this is for an A4 with 3000 verter, 3.73 gears.

JPH

iTrader: (2)

1. 2*
2. 7.400-7.425
3. lsk or xe-r, xfi maybe.

02TransAm/Batmobile

iTrader: (32)

1. I think when I measured your cam +4 degrees it came out to 8.01 DCR which is fine for pump gas. I don't think degreeing or retarding a cam would dictate which set of heads to purchase alone.
2. Not sure
3. This depends on you. You could get the XE-R lobes which are pretty good lobes but the XFI and the LSK lobes are quicker off the seat and allow more duration at .006. This means that it'll be harder on the valvetrain. It's probably recommended that you get heavier duty valvetrain components with other lobes.

CAMAROZ28AQUINO

thanks for the infor so far..i contacted Dave at texas-speed and he said they could grind me this cam in 3 days so, also a very nice person..looks like everythings gonna be a go! ordering this cam thursday...i still need to clarify what the differences will be with +2 degrees or +4 degrees of advance and the for sure length of pushrods.

BOWTIE

Well to be sure on the pushrods you would need to hold off on ordering them until you have everything together and then measure with an adjustable pushrod to get the perfect length. As for what advance to get the cam ground on, dont fret over that too much. I would suggest +2 just because that was what I decided to go with on mine which is very similar to what you are getting, but you can just get a multiple keyway timing set and set it wherever you want.

PREDATOR-Z

Auto + 4*
XE-R lobes

Or you can do LSK intake and XE-R exhaust

227/232 .643/.595 110+4 LSA

CAMAROZ28AQUINO

could you explain the differences between 4* and 2* advance on this cam and why 4* would be better for an auto...can this be run on 91 octane with
4*? thanks predator-Z

PREDATOR-Z

The difference is about 200 rpm lower band, + 4 because autos do not like to rev high.

JPH

iTrader: (2)

i disagree, it all depends on the engine combination.

PREDATOR-Z

2 things kill 4L60Es, heat and high revs.

CAMAROZ28AQUINO

bump...pushrods?

Patrick G

iTrader: (14)

+4 advance for an auto running stock heads.

+2 advance for an auto running higher compression ported heads

7.425" pushrods with stock unmilled heads and stock gaskets.

XE-R lobes for intake and either the .595" XE-R or the .575" XE high lift lobes for the exhaust (to enhance spring life of the stressed exhaust valve spring).

Sharpe

iTrader: (7)

TORCHD 02 TA

iTrader: (39)

I have that same cam.. I got mine on a 110+4... stock heads, stock 3.42. See my dyno numbers and sound clip in sig. I am also using 7.425" PRs

The only thing, being cut on a 110 with a +2/+4 advanced it does make it a bit harder to tune with the LSA being so narrow.

The difference between +2 and +4. the +2 will get you to the PB faster but fall off faster in the upper Rs. and the +4 is for top end Rs

Good Luck

CAMAROZ28AQUINO

thanks man...but i thought +4 would bring the rpms down further? any loss of torque with this cam over stock down low? where does it start to pull? if it does

hammertime

iTrader: (1)

The advance shouldn't make that cam any harder to tune. A 228/232 on 110LSA has 10 degrees overlap no matter how much it's advanced.

That's correct, more advance moves the power band down, less advance (retarding) pushes it up. See PREDATOR-Z's posts above.

Either way, that cam should pull well by 3000 rpm's with the proper DCR. You'll lose more low-end with stock chambers and gaskets because of the lower compression. A stock LS1 should get 8.28:1 DCR with that cam at +4. Mill the heads to 64cc (or replace with stock LS6 - 243 castings) and run a .045 thick gasket to get it up to 8.71, which is the max you could run with 91 octane, and that will still require a damn good tune.

JScamaro

iTrader: (6)

How would a cam like this with the 110 lsa be on the bottle? Say maybe a 100-150 shot.

CAMAROZ28AQUINO

no highjacking allowed!

TORCHD 02 TA

iTrader: (39)

Sorry, i miss typed, the further that it is advanced the RPMs are moved down.. Sorry about the mis info. Yes my car is a dawg below 2500 RPMs. i need to get gears and some heads. i am still on the stock ones. Here is my cam graph



And yes Being on a 110 +4 makes it harder to tune. LSA is mu8ch tighter than a straight up 110.

NoMoreFWD

iTrader: (1)

Wrong again.