274 Cam on My De-T

[Djdaveflow1]

Can i use my 274 Coltcam for **N/A** performance on my klde-turbo? , i will have some other mod in my head like small porting and valve seat bigger

[Ryan]

You can use it, but you may not see the gains you're looking for from it.

[marcdh]

I'd guess the NA cams might have too much duration for FI. I'd bet there's a question like this on probetalk.

[Josh]

you want higher lift usually for turbo applications not duration, as it will contribute to higher end gains when the turbo spools. BUT anything you do to your car N/A to improve your performance like cams will improve your performance when you give it FI.

This is why my B6 made so much power, I was using stage 2 racing cams it dyno'd at almost 238 WHP boosting at 14psi, I was anywhere from 20 to 40 hp higher than others with similar setups. There are a lot of misconceptions when it comes to cams and boost general rule of thumb if it makes power N/A then it will when boosted. despite what many forum goers say, it all comes down to the set up and the tuning.

There is such a thing as too BIG though to. I may have stretched that line with my set up, it has to idle at 1200 rpms to stay alive. Here is a link to my first start up on my BP, the cams are made for SCCA N/A track use, they are like 286 duration and 11.4mm lift i was the first to use them on a turbo application same with my B6 cams. A K series would sound a hell of a lot better than an I4 but http://video.google.com/videoplay?docid ... 318102561# at idle many have asked if i had a 4.6 under the hood, i dont think it sounds like a v8. But cams will defiantly give you that aggressive sound.

Probably TMI but i though it might help

[Ryan]

Holy s--- Josh, you're right, those cams are ridiculous. I think you mean advertised duration right? They're more like 220? Were you interference at .45" lift?

[Josh]

Holy s--- Josh, you're right, those cams are ridiculous. I think you mean advertised duration right? They're more like 220? Were you interference at .45" lift?

no no I am pretty sure they are really 286 duration i will have to find the spec sheet to make sure. They were from Integral cams, and they had one more set with bigger duration and TODA cams were the biggest i cam across, but kept it moderate and was going for the lift. I had the shop do the head work I wanted to ensure that it was done correctly and I didn't want to take any chances with the amount I was dumping into it. they said that they were some of the biggest cams they have seen put into a 4 banger, we had to file the sides of the lifter guides so the lobes would clear. I did all the final assembly work. Yes they were interference at .45 so when I purchased custom length SS back cut valves to compensate. I am also only at 8.4:1 comp ratio vs. the stock 9:1

fun stuff, I am getting so eager to get this thing back on the road.

[Flinch]

Interprep makes a sick set of cams ranging all the way up to 280grind they require DE heads for specific shimming, fuel management is also a requirement to run them. www.interprep.com if the link is ring just google it.

[Djdaveflow1]

Interprep makes a sick set of cams ranging all the way up to 280grind they require DE heads for specific shimming, fuel management is also a requirement to run them. http://www.interprep.com if the link is ring just google it.

The answer from coltcam : Yes, the 274° will work in a turbo you will get a little more turbo lag than necessary though compared to our true turbo grind.


Difference between cam

COLT PERFORMANCE N.A.
INT & EXH: 210° @ .050 .355 LIFT (274° Advertised duration)

COLT PERFORMANCE TURBO
INT: 210°@ .050 .355 LIFT
EX: 200° @ .050 .350 LIFT

and

NEW TRI-FLOW GRIND:

Exh: 210° @ .050 / 274° duration .355 L Turbo


I will put this cam on my new KL forged engine

[Nd4SpdSe]

NEW TRI-FLOW GRIND:

Exh: 210° @ .050 / 274° duration .355 L Turbo

You can't compare a 274* tri-flow with a regular 274* cam, that's a whole different ball game