Crower Spring and Retainer Kit vs Manley Springs

[The Flash]

I did some research about valve springs and FP2X cams. I read many times that it's ok to use them with Manley single springs if you don't rev them past 8500 RPMs. So my question is, would the Crower springs and retainers be ok to use with the FP2X cams? Are they just as good as the Manely springs without the retainers? I'm asking this because I just recently ordered a ported head and I plan on upgrading to the FP2X cams at the same time. I all ready have the Crower springs and retainers on my current head and I really don't want to buy new springs and retainers unless there is a good reason to. I know FP recommends their dual springs and retainers, but if I don't have to spend that $365, I'd rather not. I don't plan on revving my car past 8500 RPMs because my transmission doesn't like to shift that high. I do want to be sure that I don't end up bending the valves on my new head though.

Any opinions or advice would be greatly appreciated.

[Slippi84]

Yeah look up a guy named Dsm-onster runs just the manley springs with stock retainers with fp2x cams and revs pretty high he said. I would just sell the spings and retainers you have and pick up the manley's from sbr it's like 120 or something. Manley springs are stronger than some dual srping kits from what I have hear but all you have to do is check the spring tension or strength on the springs sites.

[The Flash]

Thanks, I think I'll get the fp springs to be safe. It just sucks they're on back ordered.

[chuckdog_5]

funny how i did the exact same thing, got the ported head and went with the fp2x's, if you want look up my thread "FP3x's, what do you guys think" theres a lot of info in there about basically everything you need to know. i order the manley spring and retainer kit, the guys at Slow Boy said i would be fine reving to 8500, ive heard good and bad things about the crowers, so i cant say much there

[GstRacer]

i personally wouldnt rev that high with either springs. they are ok to rev maybe to 7500 but if you missshift and the revs go sky high they wont protect u from valve float, if you miss shift at 8500 your revs will ###### go almost to 10000

[Slippi84]

Originally Posted by GstRacer

i personally wouldnt rev that high with either springs. they are ok to rev maybe to 7500 but if you missshift and the revs go sky high they wont protect u from valve float, if you miss shift at 8500 your revs will ###### go almost to 10000

I can't say that this is missinformative just plain lackin balls. Do you knwo how many people on here rev past 7500 with just springs and retainers. I don't think you know what causes valve float cause if you did then you would know that stronger springs and retainers are EXACTLY what protect you from it. SO like I said before Manley springs are stronger than some dual spring setups so you throw on some retainers to and trust me your internals or trans will go before the valves float.

[GVR4592]

If I floated my valves any time I went past 7500 I would've screwed my engine years ago. I take it to 8200 with a completely stock engine.

[The Flash]

But do you do it with fp2x cams?

[Slippi84]

Look for DSM-onster cause he does

[The Flash]

Originally Posted by The Flash

But do you do it with fp2x cams?

That was meant for GVR4592.

[Slippi84]

Originally Posted by Slippi84

Look for DSM-onster cause he does

And that was meant for you

[GstRacer]

dude i know all about valve float and what causes it. i have ferrea valve dual springs witch cost 700 dollars, and the best you can buy for a dsm. im saying that with a high lift cam like 272's it's ok to rev to say 7500 but if you miss shift and bring that motor skyhigh you can still valve float with single springs even with dual SI springs it can happen. it might not happen the first or second time but it can happen and will. ferrea are the only ones i know of that you can rev to 10000 and be fine even miss shiffting that what i'm saying just trying to look out for people

[Slippi84]

Well then all of the dsm world is wrong cause there are A LOT of people that run single springs with retainers that rev to 8500 hell there's a lot of people that have 272's with stock springs that rev past the stock rev limit not that that's smart but it just proves that if stock srpings can be reved that high then aftermarket springs and retainers are fine. Sure WHAT IF you miss a shift and like a dumb ass keep flooring it for 10 seconds sure something might happen, BUT your talkin about a car reving that high for a fraction of a second to maybe a second tops we're not talkin consistant 9500 revs every time you race.

[GstRacer]

you know what you are absolutly right man but when you buy a 3000 plus bottom end and a fully built head or even just a built bottom end are you willing to blow that up on a chance that it wont happen to you?? becasue i'm not and i'm just letting some peopl know that dont know crower spring are only about 15 percent stiffer then stock so.. if that good enought for u then that cool just i'm not willing the risk buying a 3rd motor over a couple hundred dollar diff in springs crower kit 300 ferea 700 ya it sounds like a lot but it the extra 400 worth never having to worry no matter what?? that somthing you will have to decide

[jo1]

i'm running comp cam 200 and using hks spring with crower retainer, i rev my motor regularly to 8500-9000 and mishift a couple time but never have any problem what so ever with the motor. Just the gearbox keep on breaking
A few of my friend also running a stock motor with a different cam and spring like HKS and Tomei with different combination but never have their motor fail because of mishift and we talking about 8500-9000 rpm.
Just the problem right now is with one car which running comp cam 300 have valve float when it rev to 8500. This motor have try using a few brand valve spring but the problem still occur. The owner now in the process ordering a supertech valve spring to settle the problem. But for the time being still running with valve float and did misshift a few time with the same long block till today.

[GstRacer]

fellas my piont is not to sart and agument at all. i know it has and is being done right now with other spring combos, reveing high and no probs. but it only takes one time ya know. i'm just saying for 400 extra i like the insurance factor

[Slippi84]

Originally Posted by GstRacer

i personally wouldnt rev that high with either springs. they are ok to rev maybe to 7500 but if you missshift and the revs go sky high they wont protect u from valve float, if you miss shift at 8500 your revs will ###### go almost to 10000

I underdtand what your saying in your more rescent post but this post right here from everyone's experience is just false. That's the only thing I have a problem with as now even another guy has come on and said he is reving past stock rev limiter and has no problems and has missed shifts. Granted crower's are only 15% stonger but Manley's are actually stronger than some dual spring setups either way what you call security I call overkill.

[dsm-onster]

Bottem line. . .

8500rpms weekly for thousands of miles. Manley springs. STOCK retainers. FP2Xs. New stock valves.

There's no way that I got so lucky as to get 16 incredibly processed stock valves, 16 exceptionally strong manley springs, or 16 unusually light stock retainers. Too many variables. . .

Get the manley spring and retainer kit for insurance... Because it is correct that too much is at risk. Nevertheless, I offed my car as the guinea pig. It worked.

Read this post:

http://www.dsmtuners.com/forums/showpost.php?p=1719962&postcount=2.

I have also heard questionable results from Crower springs... But this is just hearsay. I cannot offer personal experience.

Back in the day guys would take shimmed stock springs, stock retainers, and stock valves to single digit ETs.

[Slippi84]

Originally Posted by dsm-onster

Bottem line. . .

8500rpms weekly for thousands of miles. Manley springs. STOCK retainers. FP2Xs. New stock valves.

There's no way that I got so lucky as to get 16 incredibly processed stock valves, 16 exceptionally strong manley springs, or 16 unusually light stock retainers. Too many variables. . .

Get the manley spring and retainer kit for insurance... Because it is correct that too much is at risk. Nevertheless, I offed my car as the guinea pig. It worked.

Read this post:

http://www.dsmtuners.com/forums/showpost.php?p=1719962&postcount=2.

I have also heard questionable results from Crower springs... But this is just hearsay. I cannot offer personal experience.

Back in the day guys would take shimmed stock springs, stock retainers, and stock valves to single digit ETs.

|

Straight from the horses mouth

[CanadianTSi]

I've been turning my FP2x's up to 7500 (stock limiter) quite frequently with the Manley Spring and retainer kit with no problems.

Also FP2x's have alot more lift then 272's and the ramp rate is alot quicker (this is killer on the springs)

Shepherd use to turn 272's with stock springs to 9k back in the day...

[squeak10686]

I rev'd my comp 101200's on stock springs to 8500 RPMS all day on my talon for 10,000 + miles

I will be rev'ing my colt to 8750-9000 RPMS with some Manley springs and retainers...

If it breaks I'll fix it.

You guys are ####y's.