kelford 280 cams

[92tsiawdguy]

I have a a quick question. I bought a set of kelford 280 cams to run on my stroker. My question is are they too big for my gt3082R? Does anyone forsee a problem with my set-up? I could always upgrade the turbo later to a 35r or hx40 but as of right now i have a gt3082r with an .82 hot side. check my profile for mod list.

 

[95blackGsTurbo]

I would recommend a 272 setup with your turbo. While the .82 housing is good for topend, I think you may really be losing out on the mid range power with the 280's. Even with an HX35 I would keep the 272's until you move into the 35r or HX40 range.

 

[turbo23]

I'd agree that they are big for that combo. but if you have them, I would change the overlap by degreeing the cams differently, ths should help flatten the curve, maybe leave the exhaust straight up, or retard it 1*, and advance the intake 2*. I do beleve that the 272s would be better suited for your combo, but I thinkyou could make the 280s work well for you. plus the extra cubes will help bring the power curve down in the rpm range. is it a 2.3???

 

[TheBoz]

How high are you going to spin that motor. If you are going to 9k, then the 280's would be fine. I am running the 280's with a 37r right now, and they are an up top cam. So high boost, high rpm, big power. If you are only pushing 20psi, and a 30r, run the 272's. They have proven great gains and huge power. If you are going 35r or larger at some time, do the 280's. Remember you need to rev them out to at least 9k.

You must have springs and retainers for the 280's.

 

[slowgsr]

How high are you going to spin that motor. If you are going to 9k, then the 280's would be fine. I am running the 280's with a 37r right now, and they are an up top cam. So high boost, high rpm, big power. If you are only pushing 20psi, and a 30r, run the 272's. They have proven great gains and huge power. If you are going 35r or larger at some time, do the 280's. Remember you need to rev them out to at least 9k.

You must have springs and retainers for the 280's.

You need springs for the kelford 272s as well. Are you using kelfords as well because 280 dosent mean anything when talking about the true size of the cam. OP are you using the 280/276 combo?

 

[cjridert1]

Its been my understanding that the stroked engines benefit from more lift, rather than duration (I know those kelfords have hella lift - 11mm+ or something). 280s are top end cams, where are you planning to rev your stroker to? The powerband for those cams may be starting late and letting off @ a rpm thats too high for the stroker - ie not advantageous for your setup. Any 280 + stroker guys to chime in?

 

[92tsiawdguy]

Its a 2.6L. 2.4l that has been stroked. Ill be rev'n to 8000 around 33psi with meth. Its the 280 278 set up with kelford springs and manley ti retainers. Alot of people run 280 cams with a stroker. The only problem is the kelford 280s are like bc288 cams thats what has me worried.

 

[Rockbmx1]

I have spent a lot of time learing about what cams work for different setups and such, and I have found that strokers benifit from duration and lift. Several articals that I have read say that stroker motors make big cams seem smaller (ie 280's seem like 272's) cause strokers can take advantage of the extra airflow that the larger cams make avalible. Rpm's are a non related thing to where the cams make good power, its the flow its self and the cams aid the motor with ingesting all of the flow from the turbo and displacement. If that is correct, then stroker motors will be better suited to have larger cams cause they can do more with the airflow at lower rpms then a 2.0l can. With the OP having a 2.6l motor, I think that they 280 cams will rip with his setup. I local evo owner has a 2.3l with kelford 280 cams and an fp 3586hta and at 21psi he made 571whp. Needless to say, his setup works. OP, I wouldn't have any worries about running those cams with your stoker setup, I think that you will have a great setup and you will be spooling that turbo like a 14b. It should make for a great street setup.

A side note, I would look into getting some Kiggly valve springs cause I doubt that the Manley springs can take the abuse of the Kelford 280s for too long.

 

[92tsiawdguy]

they are kelford springs with manley retainers.

 

[Cassera]

I say if its for a daily driver go with the 272's but if its mainly for the track than why not go all out on 280's. Thats just my opinion. Does anybody agree?

 

[92tsiawdguy]

its a race car with with some street play. but i solved my problem. I bought a 6 blade holset hx40 for 400 new in the box from holset. I love craigslist.

 

[TSimage]

You can get those turbos for $200 all over the place, .

Paid $150 brand new for the one I had.

Good luck with the build. PM sent.

 

[dsm-onster]

WOW you have enough cam for it for sure. 238/230 at .05" lift is nuts. NONE of the advertized duration kelfords are in the right catagory for comparison. For example kelford 264s have significantly more duration than hks272s and fp2s. That's why they do so good in cam testing. Marketing ploy

Regardless, I recommend a BEP t3 housing. Or a divided runner (twinscroll manifold) and the stock hx40 turbine housing. You got the motor and cam profile. Good flow out the motor is all you have left to tackle.

Big question is whether you have the 56mm 6blade hx40 or the famous 60mm hx40. Based on the price, I suspect you have small one, not the 68lb/min one.

 

[Delta Cam]

kelford 280 duration @.050 for comparison is 212' 448 lift with 1.72 rocker ratio

 

[dsm-onster]

.05" is right at about 1mm. Per kelford's site, duration at 1mm lift is 230/230. HKS 272s are 213/213 at .05" and fp2s are 212/212 at .05" .

kelford 280s are HUGE and should not be put in the catagory of other 280s any more than their 272s with other brand 272s.

 

[mindset]

My understanding of this thread hit the shitter at post #13

 

[dsm-onster]

Advertized duration means NOTHING. Kelford 272s are better than hks 272s because they advertize the duration as being the same as hks but infact they have FAR more duration where it counts: at .05" lift. This is why the cam tests are a joke and meant for many in the evo crowd who havn't been around long enough to understand basics.

Get the results from cams in the same range of true effective duration (at .05" lift). You'll see that they don't vary so much.

Point: no one should buy kelford 272s becaue they want the same powerband as hks 272s but have the better peak results that the kelford272s provided in the cam test vs the hks 272s. The kelford272s have FAR more duration and are meant for higher rpm application thus the power goes up quite a bit higher than hks272s with the boltons the test employed. The number 272 means NOTHING. It's a marketing ploy.

. . . But I love kelford 272s I would pick them if I were in the market for typical 280-288 cams.

 

[Delta Cam]

advertised fixed

 

[andy4g63]

Advertized duration means NOTHING. Kelford 272s are better than hks 272s because they advertize the duration as being the same as hks but infact they have FAR more duration where it counts: at .05" lift. This is why the cam tests are a joke and meant for many in the evo crowd who havn't been around long enough to understand basics.

Get the results from cams in the same range of true effective duration (at .05" lift). You'll see that they don't vary so much.

Point: no one should buy kelford 272s becaue they want the same powerband as hks 272s but have the better peak results that the kelford272s provided in the cam test vs the hks 272s. The kelford272s have FAR more duration and are meant for higher rpm application thus the power goes up quite a bit higher than hks272s with the boltons the test employed. The number 272 means NOTHING. It's a marketing ploy.

. . . But I love kelford 272s I would pick them if I were in the market for typical 280-288 cams.

Thanks again many times for pointing that out, AGAIN..

 

[rbwtrans]

Advertized duration means NOTHING. Kelford 272s are better than hks 272s because they advertize the duration as being the same as hks but infact they have FAR more duration where it counts: at .05" lift. This is why the cam tests are a joke and meant for many in the evo crowd who havn't been around long enough to understand basics.

Get the results from cams in the same range of true effective duration (at .05" lift). You'll see that they don't vary so much.

Point: no one should buy kelford 272s becaue they want the same powerband as hks 272s but have the better peak results that the kelford272s provided in the cam test vs the hks 272s. The kelford272s have FAR more duration and are meant for higher rpm application thus the power goes up quite a bit higher than hks272s with the boltons the test employed. The number 272 means NOTHING. It's a marketing ploy.

. . . But I love kelford 272s I would pick them if I were in the market for typical 280-288 cams.

I think this is one of the most confusing statements that I've ever read on here. So what are you saying? Are the HKS better or are the Kelfords better? Your first sentence says Kelfords are better, but then you state that no one should buy them, then you go on to say that you love them. I'm not trying to be a jerk or nit pick, just trying to understand. I am about to upgrade my cams, and I'm trying to do research on opinions. Everything I find says Kelfords are the best, but you have me really confused. Would you please clarify what it is that you're trying to say?

 

[92tsiawdguy]

this was a true hx40w 60mm 6 blade turbo. I already ordered the bep coated housing. I think after more consideration that these cams will be perfect with my set up. Should be about to put down around 600whp with a good tune.

 

[talon20g]

I think this is one of the most confusing statements that I've ever read on here. So what are you saying? Are the HKS better or are the Kelfords better? Your first sentence says Kelfords are better, but then you state that no one should buy them, then you go on to say that you love them. I'm not trying to be a jerk or nit pick, just trying to understand. I am about to upgrade my cams, and I'm trying to do research on opinions. Everything I find says Kelfords are the best, but you have me really confused. Would you please clarify what it is that you're trying to say?

What he said was easly enough to read. Try going back and read a little slower this time. I'd explain but don't want to spend the time breaking it down (I'm lazy)

 

[turbo addict]

I think this is one of the most confusing statements that I've ever read on here. So what are you saying? Are the HKS better or are the Kelfords better? Your first sentence says Kelfords are better, but then you state that no one should buy them, then you go on to say that you love them. I'm not trying to be a jerk or nit pick, just trying to understand. I am about to upgrade my cams, and I'm trying to do research on opinions. Everything I find says Kelfords are the best, but you have me really confused. Would you please clarify what it is that you're trying to say?

hks smaller than kelford.
both good cams.
kelford has more topend,

 

[rbwtrans]

hks smaller than kelford.
both good cams.
kelford has more topend,[/QUOTE

Thanks. I mis-understood what he was saying. I'd never heard anyone say not to buy Kelfords, and was wondering why. I see what he meant.

 

[andy4g63]

^^^ Very simple.. Kelofrd's ARE NOT as what they are advertized---- 272's..
Is that simple.. Their REAL lift and duration is more like 288+ cams...