Imperator

Current setup: '99 Firehawk M6, ARE S1 heads, TR 224 (112) cam, 918 valvesprings, stock retainers, LS6 intake manifold, Grots, 3" ORY, 4.10 rear. Right now it's putting down right around 400RWHP / 385 ft-#, but I think I'd like to try a new cam grind.

I'm looking for a grind with more duration, not necessarily any more lift, ground on a 114LSA for an easy idle and putting around town (daily driver). I've been eyeballing the MMS 229 v2.1, but I've also seen a newer MMS 229 v3.0, also ground on a 114LSA. I can get MTI's X1 on a 114, and TSP has an interesting single-pattern 228 on XE-R lobes. I'm partial to a single pattern grind and open to new ideas. Can anyone give me feedback on any of the above grinds or some ideas for something new? Thanks in advance.

LOnSLO

iTrader: (15)

The 114 won't help hardly at all for drivability. I'd keep the 112, and switch to a reverse split pattern. They seem to help the drivability side a little. The X1 does just fine for street duty, and I'm sure the other grinds that you mentioned will too.

Imperator

Will the 114 LSA help idle quality considerably over the 112? These grinds have been around for quite a while... is there anything new I should check into? I'll most likely find a grind I'm interested in and call Comp to reproduce that for me.

DONAIMIAN

iTrader: (18)

you can try a 230/230 .570/.570 112 +2

Imperator

Do any of the tuner shops offer that grind right now? I take it that's on XE lobes... would you happen to have a grind number on that cam from Comp?

MyLS1Hauls

iTrader: (2)

You could try a 228/228 114+4 Comp XE profile. The lift is about .566ish. If you want a higher lift, try that TSP 228/228. Running 4 deg of advance is a good idea when running cams w/ duration this high, especially on the street.

Ragtop 99

iTrader: (7)

The mms would be a good choice. the problem with not running higher lift is the lobe rates slow down and that makes the idle worse. I now have an XE-R 228/228 114 +4 and it idles very smoothly at 900 rpm with just a hint of lope. You could consider the TR 320/224 on a 112. TR uses fast ramps but with slightly lower lift than the XE-R.

Imperator

Thanks for the advice. I also have to consider a couple other requirements:

-Reliability and valve spring compatibility. I'll want to keep the cam and springs in for at least a year, 20K miles or more without worry of having to change springs on intervals.

-I'm starting to get into road racing, so my setup is changing. I'll go with a 3.73 rearend ratio and I'll need a healthy amount of torque from 3,000RPM and up to muscle the heavy car out of corner exits.

CHRISPY

My 230/230 112LSA XE-R cam with my ARE heads and other mods makes great power (peaks at 6300rpm) and is pretty smooth and driveable with a 950rpm idle. (See sig for performance numbers)

I also passed roller emissions with this cam and the good tuning.
Cheers,
Chris

Coolvet

Sorry to steal the thread, but how do you set up a 114 LSA cam with +4 degrees? Do you need a special timing chain or pulley?

93Polo

iTrader: (5)

Chris do you have any any advance in the 230/230 or straight up?

Thanks,

Terry Burger

iTrader: (4)

I'd stick with a 114ls cam myself, I've run from 110-114 and 114 is definatly nicer on the street!

I've twiced used the MMS 229v2.1, once in a stock shortblock and another with my 396. Great street/strip cam IMHO.

Imperator

Terry, you keep up with MMS... what has MMS changed with their new Aggressor cams over the older tried and true MMS 229 v2.1? v3.0?!

MMS218 v2.0 218/218 .558 114LSA
MMS224 v4.0 224/224 .570 114LSA
MMS224 v4.1 224/224 .570 112LSA
MMS229 v3.0 229/229 .578 114LSA
MMS229 v3.1 229/229 .578 112LSA
MMS233 v1.0 233/233 .578 113LSA
MMS233 v1.1 233/233 .578 111LSA
MMS Stage IB cam 214/224 .544/.570 115LSA
MMS Stage IIB cam 218/228 .558/.558 115LSA
MMS Stage IIIB cam 224/233 .570/.578 113LSA

Larry

iTrader: (4)

If the cam is ground on a 110 ICL you have your 4 degrees of advance. If it has anything else you would need an adjustable timing chain set to achieve the 110 ICL.

Cal

iTrader: (1)

Excuse me also for butting in here, but you passed emissions on the roller, does that mean they used a tailpipe sniffer as well? That's the biggest cam I've ever heard of passing emissions.

Imperator

Bringing this thread back to the top... still very interested in the MMS grinds. How many degrees of advance is ground into the MMS 229 and what's different on the new 3.0 grind?

DONAIMIAN

iTrader: (18)

Yup, it was a sniffer test. I remember a while back about him using every trick in the book trying to pass and he did. Ill let him tell you the rest

Damian

iTrader: (89)

Let's also clarify Chris that you're running slightly more CI. That being said, a 230/230 cam is MUCH more liable to pass in your car than a 346. Bigger motors eat up 346 cams, even slightly bigger. I've seen guys fail with a TR230 here in GA.

I'm running this exact cam myself in a 346, although i'm running a 110 LSA. I have stock idle speed, and it idles like a wimp IMO. Not near enough idle for me, but for others it may be enough. Not sure if it'll pass emissions or not, I dont have to worry about that. Definately driveable on the street.


Josh