98WS6Hville

iTrader: (7)

Debating between these two cams. The lift kind of makes me nervous. What lifters are you guys running with these cams? How long have you been running your car with one of these two cams in it? How often are you replacing your valve springs? Did you flycut your pistons? General precaution questions. Obviously you will need to measure PTV clearance when running such a big cam.

Cstone812

iTrader: (5)

You won't have to flycut your pistons. You won't be changing valve springs unless you are driving the car literally every day all the time. Both of those cams suck imo and you would be better off getting a custom grind cam from someone. If you are dead set on those cams you better be getting just about every supporting mod possible for it to work right.

xdanny510x

Im running a ms4 with ls7 lifters and btr springs..no fly cut was required... All this backed by a th400 with a 4400 hughes stall and and a 12 bolt...been driving it for 2yrs so far

98WS6Hville

iTrader: (7)

I do.. I've done extensive research on here. I just feel that some of the more important aspects don't get mentioned, which is valvetrain stability.

Mods are...
Fast 92/92 (FAST 38# Injectors)
PRC Stage 1 243 Heads
MS4 Cam on 111 LSA
BTR Dual Valve Springs with Steel Retainers
Debating on which lifter to get due to high RPM bleedoff
TSP 1-7/8" Headers
3" X-Pipe
4.10 gears with TA girdle cover
Monster Stage 2 clutch

whatsa347

iTrader: (6)

I had it, only reason the motor let go was due to a broken valve spring which was my fault during a downshift, daily'd the car for 2 years before that, and the previous owner had it for a year or two before, all on PRC .650 springs. No signs of float or anything before that.

98WS6Hville

iTrader: (7)

That's the kind of stuff that I'm looking for. There are a ton of threads on here talking about either spinning a rod bearing of a piston kissing a valve, but no reason as to why it happened. Thanks for post. Anyone else have their own personal experience to share?

HCI2000SS

iTrader: (2)

Why is your heart set on these two cams only if I may ask?

Marc 85Z28

iTrader: (8)

I've been running my MS4 for almost 8 years. I did have to cut the pistons, but my heads are milled with 2.04 intake valves and a thin head gasket. Stock replacement LS7 lifters. Still on the same PRC springs my heads came with back when I built it. I had the springs tested back several years ago and all were within a few pounds of the advertised specs. Maybe 15,000 miles on them? That's the only time I've opened up the motor since the build. It sees 7000rpm every time I drive it, and I've never had any kind of mechanical issue.

98WS6Hville

iTrader: (7)

I suppose that I could go with the polluter, but I have the MS4 sitting at the house. The only time that I'm on the throttle hard, is when I'm already rolling. I don't do any races from a dig. Might as well not, these 10 bolts are crap.

Aside from that, even with my 224R the powerband dramatically increases around 4500 RPM's. That really doesn't bother me. Now if I had 1-3/4" headers, my powerband would probably occur much sooner.

BSAWS6

Why do these cams suck?

TXZ28LS1

iTrader: (5)

If your set on those size cams, i would just run the MS3 instead.

Cstone812

iTrader: (5)

Old lobe style. No low end. People hear them on YouTube and then want them. A custom grind will perform way better.

HCI2000SS

iTrader: (2)

While I agree these cams will be down a bit on low end power, they are still strong performers in terms of all out performance

Cstone812

iTrader: (5)

I agree they don't completely suck but there are much better options.

xdanny510x

Baaically these are a max effort cams..

Sales3@Texas-Speed

iTrader: (2)

Between the two I would personally choose the Tsunami camshaft for your set up for more power under the curve. You would only be giving up around 5rwhp up top compared to the MS3/MS4 cams. Now if you wish to get a custom cam give me a call and I can spec you a cam specifially for your combination and if you would like softer lobes we can spec one with softer lobes as well.

Lonnie

badtransam97

iTrader: (5)

Been running the tsunami for about 6 months now, no mechanical probs as of yet. I can tell a loss of low end, but I put 4.10's in and helped. Recently went to a th350 and it's literally a slug now. I'm hoping to fix that with a fti 36-3800 stall, if that don't help I'm going with something smaller I guess.

john563

iTrader: (17)

i think when running these large cams people got to keep in mind to add the suppoting mods to go with it..i have TSP 5.3 heads..my buddy has the same heads and their 233/239 cam..but he has 3200 stall 323 gear he complains bout low end etc driveability...now me my cam is almost identical..232/238..BUT 3:73 gear and 4200 stall...no low end loss or driveability issues with mine...when people step up to larger cams for that extra 15rwp keep in mind what you might want to change if ypu wan ti to act the way it did before you made that cam swap..

garygnu

get new trunnion bearings ,and get your valve train geomentry correct with the correct push rod length .find a good tuner .

dreww

iTrader: (1)

good info, don't know if OP is running an auto or not, but go big on the stall. I got a stock cam/heads on an auto with the 2.73s and a 4k stall. thing still ***** and gets.