Delta 272's

[Killian]

I have heard some debate but i need to know if my delta 272 cams will work with my BC springs and retainers, or do i have to go with dual springs?
pls help meh!

 

[TSimage]

You'll be fine.


BC springs suck however. They can hold the 272s just fine (I've ran similar on stock valvetrain)

Your issue is going to be the lack of build quality associated with BC.

 

[Pyro13]

Good to know, but what kind of quality issues do the BC's have?

 

[kottyking]

You will be fine. I know somebody running 280's with those springs and they are still holding.

 

[Killian]

Much appreciated thank you for the boost 'o' confidence!

 

[LiquidX]

Good to know, but what kind of quality issues do the BC's have?

Just start searching Brian Crower (BC) and you'll find some threads showing the carnage.

OP, which 272 from Delta are you talking about? Is it the HKS grind or the Kelford as both sets are 2 completely different monsters. You can't make assumption just based off of "264, 272, 280, 288 etc." but rather the lift, duration numbers and what RPM you plan on going to.

If it's the HKS grind then the BC springs will work and I wouldn't go anything over 8.5K RPM on them. It it was the Kelford grind then you'll want stronger springs like the Kiggly beehive springs.

 

[BogusSVO]

I have installed appox 30 sets of the BC1100 springs, some with the Ti retainers, but most with the factory retainers.

I believe these springs are getting a bad rep due to the people installing them not taking the time to check installed height and shimming the spring to the proper spec.

I will agree with LiquidX tho on the point of the rpm limit, I would like a little more seat pressure than what the BC1100 springs provide in the upper rpm band

From looking over the specs, the fearrea behive springs are a tad more than the kiggley springs also...
here is some info on springs and there specs.....
http://www.dsmtuners.com/forums/newbie-forum/341209-4g63t-valve-spring-info.html

 

[BigBeans]

Just start searching Brian Crower (BC) and you'll find some threads showing the carnage.

OP, which 272 from Delta are you talking about? Is it the HKS grind or the Kelford as both sets are 2 completely different monsters. You can't make assumption just based off of "264, 272, 280, 288 etc." but rather the lift, duration numbers and what RPM you plan on going to.

If it's the HKS grind then the BC springs will work and I wouldn't go anything over 8.5K RPM on them. It it was the Kelford grind then you'll want stronger springs like the Kiggly beehive springs.

I have a set of the Delta 272 Kelford grinds about to go in with BC springs and retainers. I'll be revving into the mid 8000rpm range.

If i drop a valve i'll let you know, but i'm not worried. I tend to agree with Bogus on this one.

 

[TSimage]

I have a set of the Delta 272 Kelford grinds about to go in with BC springs and retainers. I'll be revving into the mid 8000rpm range.

If i drop a valve i'll let you know, but i'm not worried. I tend to agree with Bogus on this one.

Let us all know how that goes. Those cams are FAR beyond the capacity of those springs. I've seen people run HKS 280s on stock springs but that doesn't make it a good idea. Top that off with the fact that the K272s are about the size of a 188 cam and there lies your issue.

FP recommends a heavy duty dual spring or their own fp beehive springs for their FP4r cams which are roughly the same size as the Kelford 272s..


I assumed the OP had the HKS 272s since the HKS 272s are known as "Delta 272s" and the Kelford grinds are called "K272s"

 

[jlr2196]

I run the Delta HKS 272 regrinds on stock springs & retainers (for approx. a year now) but don't rev over 7200-7300 rpm. Like others are asking or telling you, make sure you pick the right spring for the particular cam grind used. I agree with Bogus as well, I don't see why the BC springs wouldn't work out so long as you have the installed/compressed heights set correctly. Another tip...only run a spring big enough for your inteneded use, anymore and you're just putting more stress on the valvetrain & wasting horsepower.

 

[EclipticalGS]

Delta hks regrinds with stock springs id rev out to stock redline

Deta hks regrinds with BC's Id rev out to 8k solid. Make sure they are installed correctly or take em' back and grab some Manley springs/tita. retainers.

My question..Does anyone have a Dyno comparison of an hks 272 and a Delta K272?? I would love to see what that higher lift does on a sheet. That would actually help me make a choice for my spare head.

 

[Killian]

Hmm i will have to do some more research but i have the delta K272's pls provide feed back if you or someone you know is running or has had problems with these. Not sure how much past the 8k range i will be going not really building a track car just a 500+ hp street. pls keep the feedback coming it is much appreiciated.

 

[Pyro13]

This guy dyno'd a bunch of cams including some from Delta -> http://www.dsmtuners.com/forums/cyl...est-delta-hks-272-delta-k272-bc-272-cams.html Lots of good info.

 

[BigBeans]

Delta hks regrinds with stock springs id rev out to stock redline

Deta hks regrinds with BC's Id rev out to 8k solid. Make sure they are installed correctly or take em' back and grab some Manley springs/tita. retainers.

My question..Does anyone have a Dyno comparison of an hks 272 and a Delta K272?? I would love to see what that higher lift does on a sheet. That would actually help me make a choice for my spare head.

Yeah, i've got one for an Evo. The kelfords make a lot more power (456 vs 498). Granted, this is an Evo and these are the authentic Kelfords but it goes to show that the aggressive kelford grinds delta is copying are capable of a lot of power.

Ams Evo Cam Test - evolutionm.net


It's A LOT of cam. If you're running a 50+lb turbo and a SMIM with ported head, you'll reap the maximum benefits, otherwise you're creating a car with poor street manners that isn't set up for high rpm flow.